Re: [Emc-users] stepper power supply
On Wed, 2011-12-28 at 12:03 -0500, gene heskett wrote: There are hall effect based ammeters A while back, I mooched a Tek Hall-effect current probe from my buddy Eks to take some interesting pix: http://softsolder.com/2011/06/20/stepper-sync-wheel-current-waveform-first-light/ http://softsolder.com/2011/06/27/stepper-motor-winding-current-rise-time/ The winding current stays within a skosh of the setpoint for each microstep, which the driver determines by applying the sine cosine of the microstep (electrical) angle to the overall peak current setpoint. That may also contribute to the mystical 70% derating factor, because in full-step mode the driver (well, Allegro drivers, anyway) applies 1/sqrt(2) = 0.71 of the peak current setpoint to *each* winding. That keeps the overall motor power dissipation the same, but the total current into both windings is 2*(1/sqrt(2))*peak = 1.4*peak. Perhaps the person who first stated that factor, back in the dim past, forgot about the current in the *other* winding? While I was doing that, I managed to stoke a mechanical resonance that back-drove the winding current something awful: http://softsolder.com/2011/09/12/stepper-dynamometer-mechanical-resonance/ Keeps me off the streets at night... [grin] -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thu, 2011-12-29 at 21:14 -0500, gene heskett wrote: pointers to the articles That was a series on transformers triac triggering, with a resistance soldering setup as the McGuffin. CC doesn't put articles online (if you know where to look, go for April/June/August 2008), but I put up some notes a while ago; start at the first post and rummage through the next few days: http://softsolder.com/2010/09/07/resistance-soldering-gizmo-overview/ The transformer notes, complete with a B-H curve, may be most useful: http://softsolder.com/2010/09/08/resistance-soldering-transformer/ The triac trigger circuitry was *insanely* complex, because I wanted to show what happens during four-quadrant triggering with sub-cycle control. In real life, you'd just fire a triac driver for the entire heating pulse and be done with it. A while back, Eks forced me to take his homebrew water-cooled pulser built around a stack of hockey-puck transistors that he'd been using for EDM. All I need is a bulk supply behind the thing, a bit of Z axis control, and I could sink dies with the best of 'em... [sigh] -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Fri, 2011-12-30 at 16:33 -0500, Jim Coleman wrote: how stable the voltage remains across a range of loads I really didn't measure that, but I think the core losses are just this side of terrible. After all, they used core saturation for output power control, so reducing losses probably wasn't particularly important. Some handwaving: It pushed 280 A into a 14 m-ohm load with 4.1 V at the lugs, which made the winding + terminal resistance 3 to 4 m-ohm. That's higher than I expected for four parallel #10 wires: 1 m-ohm/ft x 4 ft = 4 m-ohm each, so you'd expect 1 m-ohm total. Frankly, my measurement accuracy isn't up to the task and I'm ignoring core losses. Putting three of those #10 wires in series, rather than parallel, would give 15 V with maybe 10 m-ohm. You pull 75 A for 1 kW at 13.5 V, so the voltage would drop a bit under 1 V due to copper resistance. Add or subtract a turn or two for the right answer. It might come heartbreakingly close to working. any reason this technique couldn't be used for higher voltages The original secondary had a bazillion turns of fine wire to stuff what, 4 kV or so into the magnetron. The catch would be winding the heavy wire you need at 1 V/turn: a dozen or so turns would be do-able, but much beyond that won't fit through the core windows. You could, I suppose, delaminate the transformer and start all over again, but that starts to resemble actual work. Also, the recycled Romex wire I used is, , suboptimal in a high-current transformer. I'm not sure you (well, I) could feed enamel (or whatever they use these days) insulation through the core windows without nicking it; the thick plastic insulation on that Romex gave me decent results with crude techniques. But, again, it'd probably come pretty close to working... -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gEDA / Correcting for workpiece warpage.
On Thu, 2012-01-12 at 17:28 -0500, gene heskett wrote: get another armload of 2 1/2 ring binders If you can stand to wait for a bit, I'll run off a booklet-sized version and send it to you. The printer uses bulk ink, I've finally got the restack orientation down to a reflex, and I have a comb binding machine. The booklet will be half-letter size, which is about what the old EAGLE manuals used to be, back in the day. Color, too, if the PDF has any. A 334 page manual will boil down to 84 letter-size sheets of paper, cut in half to make 168 half-size sheets, so it'll be maybe 3/4 inch thick. Thinner than the stack of EMC2 manuals everybody wanted to buy off me at Cabin Fever a year or so ago... Send me your mailing address and I'll get one off as soon as the CadSoft site recovers from the 6.0.0 - 6.1.0 onslaught. Your payment: keep telling war stories that I can send to our Larval EE in up Rochester as examples of what she won't learn in the classroom. Deal? -- Ed http://softsolder.com -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] steppers
On Fri, 2012-01-13 at 10:09 -0700, Cathrine Hribar wrote: if the steppers are wired in series, like I wired mine, they would require twice as much current Having waded through this mess not too long ago, here's what I (think I) know... Putting the two halves of a single pole's winding in series doubles the number of turns, doubles the winding resistance, and increases the inductance by a factor of four. Doubling the turns doubles the magnetic flux density in the pole, which is easier to see with the old-school unit of Ampere-turn instead of the fancy-pants metric Gauss or Tesla. Because torque is proportional to magnetic flux, you should get twice the torque for the same current. Unfortunately, the armature will probably saturate because you're now running it at twice its design flux, which will kill the torque and perhaps the motor, too. That's not a desirable outcome, so, paradoxically, a motor rated at 2.8 A per winding should run at 1.4 A with two windings in series. The resistive power losses would double at the same current, but will go down by a factor of 2 at half that current. If the motor has enough magnetic headroom, you can reduce the current by 1/sqrt(2) to dissipate the same amount of power: 2.8 A * 0.707 = 2 A. The increased inductance increases the overall L/R rise time by a factor of 4, assuming the external circuit is supplying substantial resistance (as in antique L/5R DC drives with hulking power resistors). With modern current-limiting chopper drivers, however, the rise time depends mostly on the winding's internal resistance, which increases by a factor of 2, so the net L/R increases by a factor of only 4/2 = 2. So, with the series-wired windings connected to the same supply voltage, the current rise time doubles. If you were pushing the motor's upper speed limit, the torque will fall off because the current reaches the limit set by the driver much later in each microstep. In the worst case, it no longer reaches the limit at all. It's enough to make your (well, my) head spin... -- Ed http://softsolder.com -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] eagle-6.1.0 (again)
On Tue, 2012-01-17 at 20:30 -0500, gene heskett wrote: If I fix the library, will that fix the schematic when it is next loaded? Nope, the schematic holds copies of all the components, so that you can't inadvertently wreck all your circuits with a single library change. You must delete all instances of the old part from the schematic, refresh the library to get the new part, and then re-place all of them. It's a pain, but it does make a certain kind of sense. those manuals were in my mailbox this evening. Excellent! Now, keep telling the occasional war story... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] eagle-6.1.0 (again)
On Wed, 2012-01-18 at 00:03 -0500, gene heskett wrote: Alright, how about this one? That'll work! [grin] And who knows? My Larval Engineer may remember how to poke around inside the safety covers without dying, in some future day when they desperately need a fix right *now*... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] eagle-6.1.0 (again)
On Wed, 2012-01-18 at 13:46 +1100, Erik Christiansen wrote: Nope, to update the library info used in an open schematic editor, hit Library-Update and select the modified library, or just use Library-Update_All. That's exactly what I expected to work, but it didn't: http://softsolder.com/2011/11/13/emc2-logitech-gamepad-trigger-button-name-change/ Of course, that involved a pin name change, rather than a footprint or wiring change, which may make all the difference. Mutter... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question on gcode parsing
On Sat, 2012-01-21 at 12:44 -0600, Jon Elson wrote: Every numeric value is preceded by a letter telling what it is. Except in the wonderful world of RepRap, wherein they're now (contemplating?) dual-extruder G-Code with multiple numeric values after the E axis to mix / simultaneously extrude multiple materials: http://reprap.org/wiki/G-code#M160:_Number_of_mixed_materials The E axis must then absorb a linear distance of filament, plus the mix fractions for each material. The RepRap dialect seems to be diverging fairly rapidly from what the LinuxCNC parser understands; in particular, their myriad M codes look like a problem. -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question on gcode parsing
On Sat, 2012-01-21 at 21:27 +0100, Michael Haberler wrote: LinuxCNC in the chipmaking corner of the CNC universe. Which it does exceedingly well! For a number of reasons, I don't like the Arduino-based motion control that's common to DIY 3D printers and would vastly prefer LinuxCNC for the high-performance printer that's on my far back burner. The language is close enough, right now, but it'd take some effort to make the answer come out right; which is why I'm spring-loaded to notice discussions about parsers. Returning to my lurking niche... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Mon, 2012-01-23 at 14:56 -0500, gene heskett wrote: by destroying that known position as the homed flags are set. Although I *do* have home switches on the Sherline, I also inserted [TRAJ] NO_FORCE_HOMING = 1 So it doesn't enforce the must-home-before-moving rule. Axis then starts up wherever it shut down, with the previous position in place, and runs just fine. It doesn't display the homed crosshairs, but that really doesn't matter. Ought to work for you... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Mon, 2012-01-23 at 22:34 +0200, Viesturs Lācis wrote: also tells Axis to remember joint positions on shutdown It's a simpleminded XYZA Sherline mill that wouldn't know what to do with a joint if it saw one... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Tue, 2012-01-24 at 00:12 -0500, gene heskett wrote: Its doing all moves on the .bot. files in negative X from the reference point I'm pretty sure there's a checkbox along the way that reads Mirror X axis to make that answer come out right without any further attention. The Eagle gerbv274x CAM file has a mirror option that might do exactly what you need. Probably applies only to the bottom layer, though. [*fails to install pcb2gcode due to dependency hell*] The pcb2gcode man page seems to imply (in --mirror-absolute) that backside mirroring normally takes place at the middle of the board. Perhaps you have one or more of: - the Eagle origin at the wrong spot - the backside Gerber file exported without mirroring - the --mirror-absolute option set/unset I'd expect some option twiddling would solve the problem without resort to G-Code hackage. After all, you're not the first person to mill the backside of a PCB with this tool chain! And you really need an automatic tool height probe switch... really you do! -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Tue, 2012-01-24 at 18:04 -0500, gene heskett wrote: if I can insert those few lines of code after the M6 T# command. If you add: [EMCIO] TOOL_CHANGE_AT_G30 = 1 Then M6 will move to the G30 position, which you've cleverly set right above the probe switch. Admittedly, you must then call the probe subroutine, but a little sed-fu [grin] should do the trick if pcb2gcode doesn't have an option buried in there to wrap some user code around the tool change. The sourceforge pcb2gcode page has a bullet item: output can be adjusted for automated height probing, see http://www.cnczone.com/forums/showthread.php?t=82628 That discussion points to: http://www.cnczone.com/forums/pcb_milling/82628-cheap_simple_height-probing.html Which seems to be a generalized planar-surface probe process that's likely too complex. All you must do is insert a G38.2 probe-and-set subroutine, because you've already solved the PCB flatness and alignment problems. Some sed-fu should do the trick. I vaguely recall reading that stuff while building my hand-hewn G-Code routines. Mercifully, those didn't have the problem of integrating with anything else in the known universe... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Wed, 2012-01-25 at 22:20 +, andy pugh wrote: Even that is potentially optional: Oh, *wow*... Yet Another Way to confuse myself beyond recognition. I must put the tool probe switch somewhere more-or-less fixed before I start invoking that code, but I like what it can do! -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] DIY output driver
On Fri, 2012-01-27 at 12:26 -0500, gene heskett wrote: The LM317T is a linear regulator device and could be made adjustable so as to compensate for the wiring and switching loss in your controller. Judging from Viesturs' description in a later message: Nope, I see 2 resistors in series for the middle leg. The LM317 is probably wired up as a current controller, not a voltage controller: it's providing a fixed *current* to the laser diode, not regulating the voltage across the wires. https://en.wikipedia.org/wiki/File:LM317_1A_ConstCurrent.svg In that mode, the voltage drop from controller to laser doesn't make much difference, at least within reasonable limits. What *does* matter is the voltage supplied to the controller (which sets the compliance it needs to regulate the laser current) and the current available from the raw +12 V supply (which must be greater than the laser current). Tweaking the resistors or substituting a voltage source for the laser controller will let the magic smoke out of the laser! The BD139 has a 1.5 A current rating, with a fairly low hFE = 40. That says it must have 1.0 / 40 = 25 mA of base current to saturate while carrying 1 A. More base current will be better. The 4N25 has a current transfer ratio of 20%, which means the LED current must be 25 / 0.20 = 125 mA. Anything less than that won't provide enough base drive, so the transistor won't saturate, so the laser controller won't get enough power, and the transistor will eventually overheat and die. However, you can't jam that much current through the 4N25's LED. At the risk of sounding like an Olde Farte, the easiest way to get this contraption working is a small mechanical relay: a few tens of mA in will switch an amp of DC on the output. No voltage drops, no muss, no fuss. The optoisolator won't have enough current capacity for the relay, so you will probably need the driver transistor to power the *relay* from the digital output. But there's no need for the optoisolator in that case. Or, of course, I could be completely wrong... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Back to isolcpus=1, again...
On Mon, 2012-01-30 at 23:35 -0500, gene heskett wrote: htop shows 2 cpu's with the 2nd one sitting at 0.0% use. As I understand it, that's the way it should be. The point of isolating the second CPU / core / whatever is to dedicate it to the real-time parts of RTAI, thus reducing interrupt latency. The CPU will sit there, completely idle, most of the time, so that when a real-time interrupt / task needs work, it can be dispatched immediately. Pinning AXIS to that idle CPU will definitely make the UI run much faster, but then the interrupt latency will (uh, should) get much worse, with the usual horrible effects on software step pulse generation. At least, that's how I think it works... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Back to isolcpus=1, again...
On Wed, 2012-02-01 at 10:59 -0500, Tom Easterday wrote: run the latency-test on the idle core AND run glxgears there (using taskset to move it too), my latency is very bad. That makes perfect sense: the video involved in glxgears locks out interrupts for protracted periods, so running it on the same core as the real-time handler should dramatically increase interrupt latency. It seems the AXIS UI is much better behaved, so running it on the real-time core doesn't affect latency all that much. Of course, running AXIS on an otherwise idle core will vastly improve overall performance, but that's not really the point of fencing off that core. I'd want to study the whole latency thing a lot more closely, with steppers whining away and the interpreter chewing through G-Code, before concluding that running *anything* other than real-time tasks on that core was a Good Idea. Now, if you had a four-core CPU, you could put the real-time stuff on one core, AXIS on another, have two left for everything else, and get wonderful performance... but, then, that's not a cheap Atom box. [grin] -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] US Digital encoders?
On Thu, 2012-02-02 at 09:36 -0500, gene heskett wrote: that would require a function generator Perhaps gimmicking up a HAL circuit with siggen or freqgen to drive the stepper, then compare the encoder input with the motor output? You probably don't need a sine wave, just drive the motor back and forth at a variable rate: siggen providing a sawtooth wave to freqgen? Surely it'd be more complex than that, but triggering on one edge of the motor output and looking at the corresponding encoder edges should be revealing... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] US Digital encoders?
On Thu, 2012-02-02 at 22:21 -0500, gene heskett wrote: what can he use for an exciting signal? It seems I'm missing something obvious. I thought the idea was to move the motor back forth while comparing the commanded (presumably, the actual) position with the encoder's (also, presumably, the actual) position to see if there's any lag / jitter / instability between the two. Using freqgen (plus stepgen or whatever the motor might require) to drive the motor should accomplish the first part. Triggering halscope on (some part of) the output signal, then displaying both output and input traces will reveal their relation. Then use siggen to ramp / sawtooth freqgen and you'll see how the relation varies with speed acceleration. Yes? -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need an electronic tech smarter than me
On Mon, 2012-02-20 at 17:42 -0500, gene heskett wrote: 4. All logic outputs with the slots open are sitting at about 18 millivolts. The doc says a high output when the optical path is clear, so something's definitely wrong... If that were my board, I'd expect the top-surface ground line running barely 25 mils from the screw terminal pads to be at least mildly shorted to all three output pins. Given the weak pullup, that'd hold all three to ground. With the power disconnected, are all three outputs isolated from each other *and* ground? With both polarities of the DMM? The bottom surface trace from the B terminal along those same pads may give you a clue. Whip out a magnifier and check that clearance. If you have a duplicate unsoldered board, check that one out... Is the board drawing (3 x 25 mA) for the LEDs + maybe (3 x 10 mA) for the detectors? If the detectors aren't powered up, that's a hint. If they *are* powered up, then their outputs are shorted to ground. The datasheet recommends a 100 nF cap between VCC and ground near the device. That probably doesn't make much difference in a test setup, but I'd be superstitious and slap one cap in place across the board power input. Having just brought up a homebrew PCB, I never cease to be amazed at the wide variety of things that can go wrong. Like having to scratch off a tiny un-etched copper filament shorting a IC pin to ground *under* the IC; it was visible, but just barely, only after I soldered the IC in place. Before that, it wasn't there. [sigh] -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need an electronic tech smarter than me
On Tue, 2012-02-21 at 16:15 +1100, Erik Christiansen wrote: But it has banana sockets, so it'll do me. Murphy also has his way with them, particularly nowadays: http://softsolder.com/2012/02/08/power-supply-banana-jack-misfit/ Grumble... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need an electronic tech smarter than me
On Tue, 2012-02-21 at 23:37 +1100, Erik Christiansen wrote: the last paragraph of the wikipedia entry for banana connector Seems to me that's an eBay market opportunity: who could possibly object to a small envelope with a gift from afar? -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] The future of LinuxCNC mailing lists and bug tracking
On Tue, 2012-02-21 at 10:46 -0600, Jeff Epler wrote: approval of a user's initial post will be required. My admittedly limited 3-year experience with my Wordpress-based blog shows that exactly zero spammers have figured out how to post one meaningful, on-point comment in order to clear the approve-first-comment bar and then hose the place down with junk. I have seen a few borderline cases, but right up front I say that I reject first comments along the lines of Cool post!... and I do. So my data point says approval should work pretty well. -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Q re lathe vs axis
On Wed, 2012-03-14 at 11:04 -0400, gene heskett wrote: And that man page is as obtuse as any I've seen. Rather than hammering that out by hand, use the remote desktop built right into Ubuntu? On the Ubuntu machine attached to the mill, clicky: System - Preferences - Remote Desktop Then select: Allow other users to view your desktop Allow other users to control your desktop Set up the Security section to suit your paranoia. On the Ubuntu machine attached to your Comfy Chair, clicky: Applications - Internet - Remote Desktop Viewer It'll show you a list of what's available on your network, which should include the milling machine. Clicky to select, feed in a password if you set it up that way, blow that window up to full screen, and you're there... Works for me, anyhow. I do pretty nearly all the setup fiddling from the Comfy Chair for both the Sherline Thing-O-Matic, then drop down to the Basement Lab to actually start building things. Not quite so manly as mud-wrestling with X, but ... -- Ed http://softsolder.com -- Virtualization Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Q re lathe vs axis
On Wed, 2012-03-14 at 22:23 -0400, gene heskett wrote: PClos on this quad core phenom. Well, OK, use whatever *PClos* uses for remote desktop sharing... it's not like PClos is some mutant without all the usual Linux stuff tucked away under the hood. linuxcnc runs just fine from its own keyboard, but not from an ssh login Which is why I'm recommending you do something *other* than wrestle with X through SSH: export the whole [mumble] desktop and be done with it. That's stock technology, designed to Just Work. Anything Linux-oid with a package manager should have *something* that speaks VNC to the far end of the network. Set up the milling box to allow desktop sharing with VNC, set up your desktop box to connect with a VNC desktop, and you're done. Modulo, of course, having your network running, which may not be a given at this point. That, alas, is a real swamp... -- Ed http://softsolder.com -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] database Q?
On Mon, 2012-04-02 at 23:12 -0400, gene heskett wrote: so if it did do an automatic save Among the other things I set up with a new OO/LO installation: Tools - Options - Load/Save General - check Save AutoRecovery information every and set the timer for 10 minutes That dramatically improves the chances of recovering *something*, because if it's turned off, you're stuck with whatever's been manually saved. That might be nothing at all, as you've discovered. But, come now, you *know* recording data on a crash-test dummy box is Bad Technique. Case in point: this past weekend at a robot contest, an otherwise useless stack of shredded dead trees turned out to be absolutely vital... -- Ed http://softsolder.com -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... A case for a GPS+voice amateur radio circuit: http://softsolder.com/2012/04/13/wouxun-kg-uv3d-gps-interface-functional-case/ Adapter to hold a camera on a microscope, a macro lens holder for that camera, plus an LED ring illuminator for the microscope: http://softsolder.com/2011/11/14/canon-sx230hs-microscope-and-close-up-macro-adapters/ http://softsolder.com/2011/04/11/microscope-led-ring-illuminator/ Caliper repair part (no finishing required!): http://softsolder.com/2011/05/27/thing-o-matic-caliper-repair-perfection/ Bike helmet mirror mount (ugly, but better than commercial units): http://softsolder.com/2011/07/01/helmet-mirror-mount-first-light/ http://softsolder.com/2011/06/29/helmet-mirror-mount-solid-model/ Blinky light mount for my recumbent: http://softsolder.com/2012/01/03/planet-bike-superflash-tour-easy-mount/ Cookie cutter: http://softsolder.com/2011/09/07/tux-cookie-cutter/ Fuzz blocker for a Kindle Fire: http://softsolder.com/2012/04/10/kindle-fire-power-button-protector/ Simple stepper motor mount: http://softsolder.com/2011/08/23/nema-17-stepper-motor-mount/ And, of course, improve the 3D printer: http://softsolder.com/2011/04/20/thing-o-matic-x-axis-rod-follower-installed/ Beyond their hand-knitted appearance, the parts are entirely serviceable for most of the things I do. Of course, that may just mean I do simple things that don't involve a lot of stress on either the operator or the user. [grin] Now, admittedly, those parts emerged after the better part of half a year of rebuilding to persuade my Thing-O-Matic to work the way they claimed it would. That's a whole 'nother story... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, 2012-06-01 at 08:44 -0400, gene heskett wrote: the bolts are 3/8 but the holes are 7/16 In this case, the bolts were 7/16 and the holes 3/8... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, 2012-06-01 at 10:10 -0400, Eric Keller wrote: anyone that makes things Unlike folks who use industrial-grade machinery to build exquisite widgets (you know who you are), mostly, I fix stuff. Being able to sketch out a solid model and then have it *happen* is wonderfully liberating. The Sherline CNC mill does great work (I just made a plug-ugly manual-CNC scabbard for a garden knife yesterday), but for complex shapes the 3D printer can't be beat. That radio case was what compelled me to get the printer: I couldn't imagine carving another case from solid acrylic on the Sherline. It took a few tries to get the design sizes right, but now I can build a second and a third with only a few minutes of finishing fitting; the printer can be building a case while I'm making the PCB to go inside. When we eventually downsize, I know which machine tool is a keeper... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Sun, 2012-06-03 at 21:08 -0400, Dave wrote: buy one or two PID controllers. The slicing software can produce different extrusion temperatures for different layers (or classes of layers), so the printer needs programmatic control over *everything*. You may as well integrate all that in LinuxCNC, where it belongs. The thermal time constants of small extruders seem to be on the order of tens of seconds, while my hunk o' steel requires minutes. The whole extrusion process is strongly nonlinear along many axes, which is something that's becoming more difficult to ignore as extrusion speeds increase. With XY speeds under about 30 mm/s, the linear assumptions work reasonably well. Moving faster than that shows the limits: oozing from a stopped extruder, nonlinear flow-vs-pressure, nonlinear flow-vs-acceleration, and (for my printer) unstable mechanical construction. The threshold obviously varies with printer design implementation, but the high end of of DIY 3D printing has now collided with the low end of CNC machine control. The limits of the Arduino-class controller programming model are becoming apparent (at least to me, anyhow). LinuxCNC could implement a complex extruder model as a HAL component, with inputs from temperature sensors and motion control, far better than an Arduino-based controller. Handling multiple extruders with different material properties would be relatively straightforward in HAL. Doing all the soon-to-be-required toolchanging, height probing, and platform leveling in HAL / Classic Ladder makes a lot of sense (again, at least to me). Methinks anyone working on such a contraption would receive a visit from a nattily attired lawyer who would explain his employer's view of the US patent system... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Mon, 2012-06-04 at 08:44 -0400, Dave wrote: Who hold the patents? The big players that have been doing 3D extrusion since the mid 80s, the ones with positive cash flow and actual engineering teams. The Wikipedia article has a list: https://en.wikipedia.org/wiki/3D_printing#Industrial_uses Although the earliest patents have expired, a guy at the presentation I gave to the local ACM chapter mentioned that the reason none of the DIY printers have an enclosed, temperature-controlled build chamber is because whoever (Stratasys or 3DS, I don't recall) holds *that* patent and licenses it with some vigor. I can't cite the number, though, so the story may be n-th hand hearsay. To a good first approximation, machine-shop 3D printing technology is a solved problem at industrial scale (the nanoscale stuff seems blue-sky handwaving). DIY printers started about 25 years behind the state of the art and now lags by just under one patent lifetime, where it's likely to stay. Basement-shop DIY is one thing, building a business around that tech is entirely another matter. None of the DIY players amount to pocket lint in the major league. I expect Makerbot's recent 10 megabuck infusion triggered some talks that circumscribe their enthusiasm, but I have no actual data. That said, I'd love to do a LinuxCNC-based printer, starting with extruder modeling. So many projects, so little time... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Mon, 2012-06-04 at 11:53 -0600, Jeshua Lacock wrote: you are basing this on what? Rumor, supposition, hearsay, random tales, and watching the slow-motion destruction of mobile phone innovation through internecine IP warfare. The fact that a judge had to rule that APIs can't be copyrighted tells you pretty nearly everything you need to know about the state of the art. Given the current attitude toward IP, there's no reason to expect benevolent behavior from the major players. The only reason we don't see lawyers catapulting over the parapets seems to be that the minor players lack enough money to make it worthwhile... [grin] I've started reading the old 3D printing patents. It's heavy going, but many of the clever ideas I've had / seen elsewhere seem to be covered. Verily, there's little new under the sun and, of course, I'm now coated with a thin layer of precious IP floobydust. As the saying goes: It's not whether you're paranoid, it's whether you're paranoid *enough*. -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Mon, 2012-06-04 at 18:31 -0600, Jeshua Lacock wrote: Also, as far as I know, Makerbot et al have not had much of a legal battle so far. True, but now that they're doing something over $5 M/yr with substantial funding, they look more like a target. Again, I know nothing other than the fundamental truth that money changes *everything*... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Mysterious direction-signal changes
AXIS 1.4a0 EMC2 2.0.4 (stock iso + all updates) This story takes a while to set up... While cutting out a cam that involves lots of fiddly motions, my (mostly stock) Sherline mill gradually forgot its origin position and would have, had I not popped the Esc key, gnawed its way right through the fixture. I set up another blank and, dang, the same sort of thing happened. A bit different positions, but equally bad. So I took everything apart, cleaned lubed tweaked, made a great improvement in the overall mechanical goodness, chucked up another blank, and -blap- same story. I hate it when that happens. The failures are similar, but not identical: the XY position gradually drifts in off into the +X/-Y quadrant and the Z position drifts downward. The final G0 move away from the (ruined) blank should be vertically upward, but typically goes vertically downward and thunks the fixture. The AXIS preview looks fine, so the g-code is correct. Admittedly, it took a while to get there, but it's OK. After fiddling with numerous dead ends, I reinstalled the whole Ubuntu/EMC thing from scratch. Starting from the stepper_xyza base, I set the velocity acceleration values to drive the mill at well under its ratings: 0.25 ips max velocity, 1 in/sec^2 max acceleration. This is achingly slow, but it eliminates motor dynamics from the problem: I can -watch- the motors ramp up to their peak nose-picking speed! This is on a Dell Dimension 4550, 2.4 GHz P4, 1 GB RAM, so I set the base period = 25 us. I then added steplen / stepspace / dirsetup / dirhold statements to the HAL file to put 4 ticks between each edge going to the controller box. That eliminates noise and pulse speed from the problem. With a minimum pulse length of 4 ticks, the maximum motor step rate should be 8 ticks = 200 us. That's well under actual rate required by the max velocity, so it's not producing following errors even with the slow pulses. Now, under manual control with the jog speed dialed back to 1 ipm, I have a solid failure. Tapping PgUp and PgDn (or the other axes, as well) generally does what I'd expect. However, -sometimes- the motors turn (slowly!) the wrong way; start correctly, jerk backwards, then run backwards; run correctly for a short time and then stall; and so forth. I attached a digital 'scope to the Z axis step direction signals. They're clean digital pulses, good amplitudes, no noise worth mentioning. The step signal shows the expected ramping-up and ramping-down frequencies at about the right rates. However, the direction signal misbehaves! Erratically, occasionally, but reproduceably (if I'm patient), the direction signal changes while the step signal is pulsing. For example, it will change from 1 to 0 to 1 (high - low - high) while I'm holding down the PgUp key (not calling for a direction change). The other axis behave similarly. The changes seem to be in the tens-to-hundreds of millisecond range and generally occur at the leading or trailing ends of the motion, not in the middle, but that may just be my observations so far. While the direction signal glitches, the step pulses continue to ramp up or down, so it seems as though something is losing track of which the motion direction for a while . The resulting transients whack the motors pretty hard; they're obviously not carefully planned direction changes! Note that the parallel port is disconnected from the driver box, the spindle motor is off, and this is pure software from the PC. Nothing mechanical at all! This is the most complex part I've made, so the mill was running longer and doing more motions than ever before, which would cause the misbehavior to add up. However, I -think- it's the first part I've done since the most recent EMC updates, although I'm ashamed to admit I haven't been logging what I've been doing against those changes. It -definitely- didn't misbehave like this back in the BDI days. I -think- the first few EMC2 versions were OK, but I can't be sure because it's intermittent enough that I might have not noticed slight errors on the simpler parts. It's not like I'm doing really high-precision stuff here... I did manage to make one good cam before the latest updates, so it -did- work correctly a week or so ago. Anyhow, I think I've eliminated all the things that could cause the problem outside of the EMC2 code itself, but if there's any other information I can provide or debugging I can do, I'm willing, because it flat out doesn't work for me right now! Thanks... -- Ed - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Emc-users
[Emc-users] Axis 2.1.6 jogging always uses inches?
As nearly as I can tell, Axis always jogs in inch units, even in G21 mode, even when displaying millimeters. Fire up Axis, F1 F2 to get started, F5 type G21 for metric units, View - Show MM, then F3 to get manual controls. Select X axis, pick 0.1 jog increment from the list, then click the + button: the displayed X position changes by 2.54 mm. Yikes! Seems like it ought to change by 0.1 mm. I -think- that means Axis must keep track of the G20/G21 state and update its stepping value accordingly. Of course, that might be a whole lot trickier than it seems... as is always the case with software! -- Ed - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis 2.1.6 jogging always uses inches?
While a better choice in emc 2.1 would have been to treat the jog distance as in the currently-displayed coordinate system That would definitely have obeyed the principle of least surprise... I think the version 2.2 solution will be even better. Sounds good to me. Be sure to include both inch and metric units in the default list, so that it's usable for both right out of the box! Is it in the CVS code these days? Any reason not to use the Latest Greatest version? Thanks... -- Ed - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Cabin Fever presentation
Gene: Where and when is this Cabin Fever supposed to be? York, PA. Two weekends and counting: http://www.cabinfeverexpo.com/ More info should be up shortly; I just sent in a description. Gene: another emc article in Circuit Cellar? I write about analog and RF stuff for them, but, hey, stepper drive circuitry has lots of analog issues! You'll see some of those same pix at Cabin Fever, should that influence your decision (one way or the other). Seth: I am definitely planning to be there. OK, at least you and me will have a fine time playing with my show-n-tell gadgetry... -- Ed - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Cabin Fever presentation
are you going to video the talk and place the video where we can see it? I don't know what the show organizers have on tap, but I wasn't planning to immortalize the thing! I could put up the PDF version of all the slides I'll be using (where? suggestions?); it's about 8 MB. Plenty of pix, some bullet-item text, but none of the patter. I don't know how useful that would be, but I used a Creative Commons license and it's good to go. -- Ed - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Cabin Fever presentation
with the 'patter' would be golden. I briefly considered hitching a Webcam+mic to my laptop, the one running the presentation, and recording on the fly. Then I came to my senses. If anybody else will be there with audio or video recording gear, we'll go for it... but I'll have enough to do, what with simultaneously standing up -and- talking! -- Ed - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] CNC Presentation Trip Report
About 50 people showed up for my Why CNC? An Introduction talk at Cabin Fever Expo, perhaps ten snuck out early, and about two dozen hung around afterward for the demo. I think a good time was had by all: the presenter wasn't injured during the after-game melee. I made a botch of the demo by not telling my assistant (my daughter) which parallel port I used for the motor controller, then fumbling around for far too long figuring that out. However, the crowd learned how Things Go Wrong and that problems can be fixed with the help of some friends; my thanks to the guy who noticed that the box had -two- parallel ports. After moving the cable, the pace of the festivities picked right up. I don't know who was wielding the video camera, but there -is- a recording. Given the dim lighting, I'm probably just a blur, so if someone could extract the audio track, turn it into an MP3, perhaps add slide-change beeps (I think I can do that), and put it next to the PDF of my slides, that would be better. The PDF is at http://members.localnet.com/~ednisley/CNC%20Introduction.pdf where it will stay until that account closes in February. If anyone has a better spot, feel free to shuffle the file as needed. Our van's mass air flow sensor died on I-81 near Harrisburg on Friday night, so I spend Saturday afternoon Sunday morning diagnosing fixing that, rather than exhibiting my toys yakking with the CNC folks at the show as planned. Swapping a MAF sensor in the Advance Auto Parts parking lot at 19 degrees with a 20-mph breeze is -not- my idea of a good time. The folks at the Toyota dealership confirmed my already low opinion of Toyota's personnel, but I heroically suppressed my urge to urinate in their Mr. Coffee. My daughter was enchanted by the craftsmanship on display at the Expo and gained an appreciation of what's required to produce -perfect- work instead of doing just enough to get by. Truly, those engines are jewelry, not machinery! Thanks to all of you folks for -your- craftsmanship in EMC, which made my presentation possible. I hope I showed it in a good light and got a few people started on the CNC path. -- Ed - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] CNC Presentation Trip Report
If someone needs it emailed, or zipped A ZIP file won't be much smaller, alas, because the JPG images are so large. I just generated a version with brutally squashed pictures that look pretty grotty, but the file is a mere 1.6 MB: http://members.localnet.com/~ednisley/CNC%20Introduction%20-%20lowres.pdf Apply eyedrops and you'll be OK... At least this one ought to be easier to email! -- Ed - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Nisley Presentation at Cabin Fever
posted your introduction pdf to my site Thank you! I haven't been able to track down who did the video recording during my talk. Does anyone know? If we can find that tape, peel the audio track off, and put it near the PDFs, that would be a good addition. Why the kid's finger in disrepair? Fortunately, that's not her finger. The caption on the original reads Honey, I told you I'd never take my ring off. It's a condition called degloving: the guy caught his ring in rotating machinery. My shop assistant tells me she doesn't like that picture at all, not one little bit. I tell her Good. Think about it. Warning: graphic injury! http://www.safetycenter.navy.mil/media/posters/posterimages/hand.jpg They post a new and disturbingly -true- safety situation every week: http://safetycenter.navy.mil/photo/default.htm -- Ed - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Singular realtime delay error
Gene Heskett wrote: When starting emc on its own screen, I do get a realtime error, just one that never repeats. That just cropped up here after I updated to 2.2.3. There's one realtime error when Axis starts up, then nothing else. I run it either locally or through rdc, with the same results. The info in dmesg looks like this: [ 187.772175] I-pipe: Domain RTAI registered. [ 187.772183] RTAI[hal]: magma mounted over IPIPE-NOTHREADS 1.3-00. [ 187.772186] RTAI[hal]: compiled with gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5). [ 187.772192] RTAI[hal]: mounted (IPIPE-NOTHREADS, IMMEDIATE (INTERNAL IRQs VECTORED), ISOL_CPUS_MASK: 0). [ 187.772194] PIPELINE layers: [ 187.772197] f8bca780 9ac15d93 RTAI 200 [ 187.772200] c02d1680 0 Linux 100 [ 187.791834] RTAI[malloc]: vmalloced extent f8c3e000, size 2097152. [ 187.791902] RTAI[malloc]: loaded (global heap size=2097152 bytes). [ 187.793705] RTAI[sched_lxrt]: loaded (IMMEDIATE, UP, USER/KERNEL SPACE with RTAI TASKs). [ 187.793716] RTAI[sched_lxrt]: hard timer type/freq = 8254-PIT/1193180(Hz); default timing mode is periodic; linear ordering of timed lists. [ 187.793729] RTAI[sched_lxrt]: Linux timer freq = 1000 (Hz), CPU freq = 2392319000 hz. [ 187.793732] RTAI[sched_lxrt]: timer setup = 2010 ns, resched latency = 2689 ns. [ 187.843547] RTAI[math]: loaded. [ 188.027891] config string '0xecf8' [ 190.667837] RTAPI: ERROR: Unexpected realtime delay on task 1 Running the latency tests for an hour didn't turn anything up, so it looks like a startup glitch. Suggestions? -- Ed - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Netiquette: Trimming Messages
A plaintive note from a lurker... When you guys hit Reply to fire off a one-liner message, could you -please- trim off the 1300-some-odd lines of diagnostic trace / dmesg dump / status log that accompanied the original note? I'd appreciate it if folks replying to digest messages would do the same, as there's nothing quite like sorting through two or three nested digests to find the one-liners. Ob-EMC: 2.2.6 is working great for me on my hacked Sherline. Back to lurking. Thanks... -- Ed - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Sherline CNC show-n-tell
I've offered to show off my Sherline CNC setup for a couple of folks from the Sherline list who are thinking about buying one. After considerable to-and-fro-ing, we've settled on this coming Sunday, 24 September. If anybody else is interested, c'mon over... I figure you guys all know more than I do about EMC, so anybody who shows up can keep me straight. We'll shoot the breeze, see how the CNC thing works, talk about EMC G-code stuff like that, and play with shiny toys. No agenda, no schedule, no sales pitches. I'm in Poughkeepsie, NY, halfway up the Hudson between NYC and Albany, inconveniently located quite far from nearly everywhere else. Drop me a note for details. Show up before noon-ish and you'll get in on some cold-cut lunchy things. If you're not out by suppertime, you'll be forced to eat something then, too... -- Ed - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Sherline CNC show-n-tell
It is already November for this year. And you know what? They're going to change the month -again- in just a few days. I can't keep up any more! This coming Sunday is actually 24 November. Right? sigh I will be home: can't risk going out in this condition. And that is a fur piece from Ithaca A mere 4 hours along the Future I-86. Heck, you could sneak out back before supper and nobody'd notice. Now, after eight hours on the road, you might be as disconnected from reality as I was after returning from near Harrisburg PA on Tuesday, through the Pocono Snows. Driving always dumbs me right down to room temperature. Must. Recalibrate. Caffeine. Delivery. System. -- Ed - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Sherline CNC show-n-tell
My 2008 one says this Sunday is November 23. Hey, we live here: just show up some time, OK? From the back door, the head is on your right, the basement door is straight ahead, and the kitchen is on the left. What's not to like? Pay no attention to the doddering fool in the living room crouched at the keyboard; he can't help ya nohow. Right now I'm laying out a solar panel measurement circuit board. This story is not going to have a happy ending... *fumbles for more teabags* -- Ed - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Gcode Newbie Question - repetitive par t making
if Ed will be continuing similar articles in the future That's the plan! The Winter 08 column deals with fillets on internal corners: using cutter comp and figuring the arc centers for mostly right-angle corners. Pretty easy once you see it. Next up: finding the centers when the sides aren't at right angles. Time to haul some trig functions out of the closet, blow the dust off, and fire those devils up. So many topics, so few issues... -- Ed -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Gcode Newbie Question - repetitive part
Once upon a time, I wrote some gcode subroutines Sure: I'm always interested to find out what I could do better! Or at least differently, as I seem to have a lot of code sitting around that makes me wonder what I was thinking at the time. Maybe nothing, aye, there's the rub. Thanks... -- Ed -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] New cutter compensation algorithm in TRUNK
The new algorithm handles concave corners And here I am, halfway through writing the next installment of Adventures in Filleting, explaining how to lay an arc into a concave corner to avoid gouging. I am crushed, I tell you, -crushed- by this horrible news! big grin The timing is actually great. I'll add a note along the lines of by the time you read this, EMC2 should handle concave corners automagically, folks can download the Live CD, and everybody lives happily ever after. I love a happy ending. I must do some prep for Cabin Fever (i.e., whack stock into bite-sized pieces collect my toys into one untidy heap), but after we're back I'll see how it works. I don't do any of that fancy machining stuff, though, so most likely I can't contribute any useful checking; if it ran your testcase, it'll have no trouble with my parts. Great improvement... many thanks! -- Ed -- Check out the new SourceForge.net Marketplace. It is the best place to buy or sell services for just about anything Open Source. http://p.sf.net/sfu/Xq1LFB ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Cabin Fever Trip Report
Here's a writeup of my Cabin Fever Expo adventures, with Brian's incriminating picture. There's a link to my handouts and I'll get more of my code up as examples of what (not) to do. http://softsolder.wordpress.com/2009/01/21/cabin-fever-trip-report/ Cabin Fever's demographics are grim; in a decade most of the exhibitors will be gone. EMC may be a way to get more young folks into the craft, but we definitely gotta buff up our image... -- Ed -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Cabin Fever Trip Report
cut out a pinewood derby car design. bring my 3 axis router (kit built) Given the Sherline's itsy-bitsy work envelope and nose-picking speed, I think carving out -real- Pinewood Derby cars on your router would be even better. Bolt a block to a plate, clamp the plate to the base, and then let the chips fly. How long would such a thing take? If you were excruciatingly clever, you could mill the axle supports, too, perhaps as little stubs faired out from the sides. When you're done, unbolt the block, hand the kid a finished car (with pre-drilled axle holes?) and a ziplock baggie full of wheels, nails, and an EMC sticker or two. Killer demo, if a bit noisy. We'll all be hoarse anyway. I could mill out wheels, albeit at a pathetically slow pace, by bolting plastic disks to the rotary table and carving the tread with nice algorithmic patterns. Haven't thought on it much more than that, but it'd likely be the same level of complexity as the demo-quality finger rings I keep muttering about. for people to try installing from the Live CD and running the simulators That would exceed the attention span of most folks, but if you'd put on a quasi-seminar showing how it's done and -then- break to the simulators, that'd be a win. Run the talk a few times during the day (with announcements on a board in the lobby and over the unintelligible PA system) and folks would flock to it. Sounds like a plan, it does indeed ... -- Ed -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Data Point: How Many of Us Are Here?
After I posted the note about my Cabin Fever trip report a week ago, that blog entry got a bunch of hits in quick succession. In round numbers, 176 people clicked on that link from an actual email, a Web email client, or the many mailing list archives scattered around the Web. Dunno how many total list subscribers there are, but there's one number. A simple plot and a few numbers lives here: http://softsolder.wordpress.com/2009/01/27/hits-from-emc-mailing-list/ As nearly as I can tell, this is a small, but -very- helpful group! Thanks to all of you for hauling me along... -- Ed -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Either I am a survivor, or he isn't ready for me.
On 06/07/2014 03:24 AM, Gene Heskett wrote: I keep telling myself he isn't ready for me yet. One of my aunts had stroke that knocked her flat out on the kitchen floor, but she thought Oh, no, you don't! Dragged herself over to the table, pulled the tablecloth off to get her phone, dialed 911, and yakked with the EMTs all the way to the hospital. Some years earlier, she insisted on *watching* while they carved a huge tumor out of her belly; evidently, they couldn't use general anethesia for some good reason. She's always been about the size of a sparrow, but losing 10% of her body weight didn't slow her down at all. As for you: every morning, the Devil wakes up, checks his status board, and says Whew, Gene's still alive! Now, get back to making chips... -- Ed softsolder.com -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] integrator manual
I M does not shows any working sample Here's how I did it for my little Sherline mill... Modify the Sherline control box to accept the wiring. This is an example for the tool length probe line, but the same thing happened for the home switch input: http://softsolder.com/2010/04/11/sherline-tool-length-probe-adding-a-jack/ Connect the physical home switches to the parallel port pin and define the HAL wiring that connects the input pin to the homing signals: http://softsolder.com/2010/05/11/sherline-cnc-mill-adding-home-switches/ Define the homing parameters that control the motion on all three axes: http://softsolder.com/2010/05/12/sherline-cnc-mill-defining-home-switches/ That configuration worked back in the 2.4 days and has continued to work fine ever since, so it should get you reasonably close to your goal. Hope that helps ... -- Ed softsolder.com -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] integrator manual
On 07/16/2014 04:35 PM, a k wrote: I did input # Read home switch inputs from I/O card. net x-home-sw = hm2_[HOSTMOT2](BOARD).0.gpio.026.in net y-home-sw = hm2_[HOSTMOT2](BOARD).0.gpio.030.in net z-home-sw = hm2_[HOSTMOT2](BOARD).0.gpio.034.in Did you change the *example* HOSTMOT2 and BOARD strings to match the actual hardware in your system? This *sample* for my hardware shows the commands that dump the names: http://softsolder.com/2013/06/17/mesa-5i25-7i76-hal-pins/ I believe there's a period (.) missing before the BOARD part of the identifier in what you have written. This seems more likely: hm2_5i25.0.gpio.032.in However, that's for my system, not yours, and you must modify the *examples* to match your actual hardware. -- Ed softsolder.com -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] uvcvideo vs v4l video
On 07/24/2014 09:06 PM, Gene Heskett wrote: the real problem that caused the usb disconnect? If the dmesg dump says something like: hub 1-0:1.0: port 2 disabled by hub (EMI?), re-enabling... Then I'll lay you long odds it really *is* EMI from your myriad steppers and suchlike. Spent quite a while figuring that out, but in my case it was an acrylic jacket: http://softsolder.com/2009/01/28/usb-disconnects-nobody-moves-nobody-gets-hurt/ Now, if that's not what dmesg says, I'd still suspect EMI... -- Ed softsolder.com -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G-Code files needed
On Sun, 2011-01-23 at 12:23 -0800, Neil Baylis wrote: large or complex g-code files The programs I've been writing for my Along the G-Code Way columns in Digital Machinist aren't all that large, but they do exercise some EMC2-specific language features. The more recent ones will probably be the most useful. They're tucked into the ZIP files at: http://www.digitalmachinist.net/downloads Which text editor are you targeting? -- Ed http://softsolder.com -- Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G-Code files needed
On Sun, 2011-01-23 at 15:00 -0800, Neil Baylis wrote: If there's demand, I would consider other editors as well I'll put in a vote for KATE, the KDE editor. It already has G-Code highlighting, but, lacking EMC2's language features, it's pretty much useless. http://kate-editor.org/ -- Ed http://softsolder.com -- Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Multiplexers
On Sun, 2011-02-13 at 07:59 -0600, John Thornton wrote: use a multiplexer to get 4 thermocouples into one MAX6675 Given the microvolt-level signals from a thermocouple, it's not clear the signal emerging from a multiplexer would bear more than a casual relation to the actual temperature. With any additional conductors / connectors in the middle of a run of thermocouple wire, each temperature gradient adds *another* thermocouple joint with its own voltage to the mix. An analog multiplexer adds several solder joints socket pins, each with its own temperature gradient, to the input and output signals. Inside the chip, the signal faces silicon offset leakage voltages that are about the same size as the thermocouple signals. While I'm sure multiplexing thermocouples can be done (nay, has been done), it's a nontrivial project to get *accurate* measurements out of the far end. The MAX6675 is actually a pretty good deal, considering that it goes directly from thermocouple microvolts to Celcius digital values: think of it as buying engineering expertise. DIY op-amp circuitry faces similar problems: while it can be done, *accurately* amplifying microvolt DC signals and stabilizing the result is a nontrivial project. If you do use MAX6675 chips in a situation where the thermocouple bead could contact a live wire, take this problem into account: http://softsolder.com/2011/02/06/thing-o-matic-mk5-extruder-protecting-the-thermocouple/ Sounds like you've got a fun project, though... -- Ed http://softsolder.com -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Joypad button to tell axis to move?
On Thu, 2011-02-17 at 13:39 -0600, Igor Chudov wrote: I would like to use regular joypad buttons I did that with my Logitech gamepad: the joysticks do gradual motion and the buttons do on-off motion. This should get you started: http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/ I wrote up a somewhat more elaborate version for Digital Machinist magazine. You can fetch the files (but not the article itself) from: http://www.digitalmachinist.net/files/downloads/2010Winter/DM%205.4% 20Nisley.zip There's a bit of trickery in that version to avoid some race conditions, but the overall logic is straightforward. As soon as I got it set up, there was no going back! -- Ed http://softsolder.com -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Temperature Controller with nested PID loops
On Fri, 2011-02-18 at 19:53 -0800, Kirk Wallace wrote: I might not have to be the only one that's always right. I regard it as my solemn obligation to be one of the two dozen folks who are (almost) always wrong... after all, without me, how could you possibly look so good? [grin] -- Ed http://softsolder.com -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Single to Three Phase Rotary Converters
On Mon, 2011-03-14 at 11:00 +, andy pugh wrote: which caused some worrying sizzling noises. Obviously, your radio isn't turned up nearly loud enough... (Which helps with car repairs, too.) -- Ed http://softsolder.com -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] manual tool change
On Fri, 2011-03-18 at 20:58 -0500, Jon Elson wrote: pre-measuring all your tools and entering the length offsets in the tool table, so you don't have to touch off at each tool change. Or you can add a tool length probe station and have tool length measurement happen automagically, without interrupting the program. You *definitely* need something far more rugged on a real milling machine in an actual machine shop, but the switch itself need not be more complex than a snap-action button: http://softsolder.com/2010/12/06/improved-tool-length-probe-switch/ The stability and repeatability are surprisingly good: http://softsolder.com/2010/12/07/improved-tool-length-probe-switch-repeatability/ http://softsolder.com/2011/01/15/improved-sherline-probe-length-switch-repeatability-selah/ When it comes time for a tool change, the G-Code does the G30 / Tx M6 dance and puts up a prompt. My ArmStrong tool changer swings into action; it finishes by whacking the spacebar to continue. A subroutine measures the new tool length, adjusts the offset, and the G-Code continues with a properly adjusted tool. That doesn't solve the my tool broke and I can't jog manually problem, but for my simple needs it's *wonderful*: swapping tools is no longer a major pain. One gotcha: Axis will occasionally leave the machine in the G59.3 coordinate system (which has absolute machine coordinates) after I interrupt the program, even if I interrupt it when G54 (which has the tool fixture offsets) should be active. This is most likely due to my misunderstanding of how coordinate systems work, not an intrinsic flaw. Highly recommended... -- Ed http://softsolder.com -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] multiple instances of emc?
On Sat, 2011-04-02 at 15:33 +0100, Steve Blackmore wrote: The custom kernel says edit menu.lst - doesn't exist any more The Grub2 file is /boot/grub/grub.cfg. It looks different, but gets basically the same treatment as Grub1's menu.lst. But it's actually worse than that. The grub.cfg file gets rewritten every time there's a kernel update; there's a warning at the top of the file to *not* hand-edit it. You're supposed to futz with the configuration files in (IIRC) /etc/grub that tell Grub2 how to automagically create grub.cfg as part of the kernel update. HOWEVER, I've been unable to figure out how to do something special with the RTAI-modified kernel: there's no way (that I can find) to *not* regenerate a standard kernel boot line for the RTAI kernel. So whenever I hand-edit grub.cfg, I add a note to the RTAI menu entry showing that it's decorated with isolcpus=1. After every kernel update, that note vanishes: it's time to edit grub.cfg again. Maybe there's a way to do that automagically, but ... -- Ed http://softsolder.com -- Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Monitor and control my CNC through an IP camera ?
On Mon, 2011-04-11 at 09:51 -0700, Kirk Wallace wrote: a page on the wiki covering the making of bellows. For those of us with Sherline mills and no flood coolant, plain old paper works surprisingly well. You don't form a deep emotional attachment to it, so throwing it out when it gets really crusty doesn't hurt at all... http://softsolder.com/2010/02/26/improved-sherline-way-bellows/ -- Ed http://softsolder.com -- Forrester Wave Report - Recovery time is now measured in hours and minutes not days. Key insights are discussed in the 2010 Forrester Wave Report as part of an in-depth evaluation of disaster recovery service providers. Forrester found the best-in-class provider in terms of services and vision. Read this report now! http://p.sf.net/sfu/ibm-webcastpromo ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Beating Grub2 into submission
On Sat, 2011-04-09 at 21:41 -0400, Kent A. Reed wrote: Kudos, brickbats, big yawns, gleeful nitpicking, all willingly accepted, Well, here's a heaping double handful of kudos from me! Your script bottles up a whole bunch of magic that I certainly couldn't have figured out on my own. Thanks... -- Ed http://softsolder.com -- Forrester Wave Report - Recovery time is now measured in hours and minutes not days. Key insights are discussed in the 2010 Forrester Wave Report as part of an in-depth evaluation of disaster recovery service providers. Forrester found the best-in-class provider in terms of services and vision. Read this report now! http://p.sf.net/sfu/ibm-webcastpromo ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Sat, 2011-06-11 at 19:17 -0400, Colin K wrote: you can make very complex geometries without multiple setups or fixtures That's why I got a Thing-O-Matic: create near-net parts that don't need much finishing. This one came out perfectly: http://softsolder.com/2011/05/27/thing-o-matic-caliper-repair-perfection/ The parts have a rather hand-knitted aspect that doesn't matter for the things I build. Some close-ups: http://softsolder.com/2011/04/18/hbp-aluminum-build-plate-abs-film-win/ It's handy for cranking out one-off parts on short notice: http://softsolder.com/2011/06/11/stepper-motor-sync-wheel/ Fortunately, some parts really don't have any accuracy specs: http://softsolder.com/2011/06/02/thing-o-matic-graduation-day/ Being that sort of bear, I've tweaked / improved / rebuilt / replaced much of the printer's innards and now have something that works quite well. Other folks have had zero problems with the stock printer, so much of what I've done has been along the lines of That doesn't seem quite right, I'd rather do it this way rather than the rare Dang, it's busted! Like, for example, my experience with the stock stepper motors: http://softsolder.com/2011/05/05/thing-o-matic-mbi-stepper-motor-analysis/ It now produces good parts almost every time, although you must design parts with the printer's limitations in mind. The smallest feature will be a bit under 1 mm, you can put edges anywhere with resolution around 0.05 mm, it doesn't do steep overhangs very well at all, and the objects must fit in a more-or-less 100 mm cube. But you can print some truly odd things: http://softsolder.com/2011/05/02/what-would-barbie-pack/ The firmware doesn't apply acceleration limiting, which I regard as a major limitation on performance and dependability. I'd like to plug the motrors into EMC2 and whip up some HAL / ladder logic to control the extruder temperatures, but I've reached my tinkering limit for a while. DIY 3D printing is *definitely* not a plug-and-play experience! If you have nothing better to do for a while, my blog's Thing-O-Matic category may be amusing... -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Sat, 2011-06-11 at 23:54 -0700, Mike Payson wrote: that is a limitation of the Makerbot firmware. As nearly as I can tell, ReplicatorG has become sufficiently intertwingled with the firmware that it's best to not stray too far from the beaten path, so I'll continue to use the 2.7 firmware until things settle down a bit. RepG 24 has 17 different drivers for various combinations of machines / firmware / configurations and it's not at all clear what works with what. I used to like being a beta tester, but I've gotten over it... integrated MCU based driver The problem with that is economics: right now, the hardware cost for the microcontroller(s) and motherboards has run up against the cost of an ATX system board. In fact, the MBI retail price for the Ardino / Motherboard / Extruder Controller exceeds the full-up Atom I'm using with the Sherline. There's not all that much horsepower in an 8-bit microcontroller and the firmware is bumping up against those limits, too. I expect the next generation will use an ARM or some such, at the economics will definitely favor a commodity PC and a very cheap analog interface board; you need pretty much the same stepper drivers for either one. All the firmware does is eat G-Code and spit out parts; that's exactly what EMC2 does with my Sherline mill. I think it'd be a whole lot easier and less expensive to use EMC2 for motion control than to re-invent all those functions and jam them into an Arduino. Plus, you'd get a much better user interface, bigger displays, better keyboards, and a much more stable system for free. The fact that the computer inside the printer is a PC running EMC2, instead of a microcontroller running something else, is largely irrelevant. From the outside, you feed either printer with G-Code from Skeinforge it produces parts; the advantage of using EMC2 is that developers can concentrate on improving *printing* rather then reinventing motion control / UI wheels. I'd like to do it just to show how it works, but ... not right now. -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Sun, 2011-06-12 at 14:33 -0700, Mike Payson wrote: a bit of a Makerbot champion The *idea* behind the Thing-O-Matic is great, but the *implementation*, well, not so much. Plus, all the things on the their wishlist seem to be done deals with EMC2, but I digress. ship it, then sell them an upgrade when they complain. Which is why I have trouble recommending that anybody buy a Thing-O-Matic: it costs about $2k by the time you get it gussied up with everything required to make it work the way they described it late last year when I bought it. That's ignoring the inconvenient fact that not everything you'd get actually works the way it should; it's still a shop project. ARM chips are cheaper than an 8-bit ATMega *pumps fist* Yes! I had a ten-cent bet with myself that when everybody finally admitted that an Arduino couldn't handle the load, they'd step up to an ARM and start from scratch. since those same points are true of the RepRap today with the host software. Ah, but look at it a bit differently: A dual-core Foxconn Atom (with parallel port!) + 1 GB DDR2 + 80 GB SATA is $150 *retail* at Newegg, so it's under $70 OEM. Add a custom interface board with the stepper interface and an Arduino-class micro that handles the heaters / fans / thermocouples for maybe $50 OEM. You get a headless EMC2 system for $120 OEM that runs rings around a de novo ARM, particularly because you don't have to re-write all that motion control and UI code. Example: Want a higher-end 3D printer system with touch screens, keyboards, joysticks, whatever? Would you rather have this: http://www.makerbot.com/wp-content/uploads/2011/03/Interface_Text.jpg Or this: http://www.linuxcnc.org/docs/2.5/html/gui/touchy.html Given that a VGA-resolution 8-inch touch screen costs the same (admittedly, on eBay) as the MBI kit (modulo shipping), I think you see where I'm coming from. With EMC2, you just plug it in, load up the HAL code, and you've got a touch screen interface. Which printer UI would be an easier sell to the *next* 10,000 customers who aren't gearheads like us? Attracting their attention might be worth a hundred bucks right there... /rant [grin] -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepConf configuration | EMC conversion
On Mon, 2011-06-27 at 13:41 -0700, For Sale Sticker wrote: 'leadscrew pitch' (do I just count the number of threads per inch?) It's barely possible that the leadscrew will have a multiple-start thread, making the linear-motion-per-turn higher than you'd expect from a simple count of the threads-per-inch number. Turn the leadscrew by hand and count the number of threads that vanish / appear at the edge of the stage for each turn: mark a thread, then watch it for one turn. If one thread vanishes / appears, then the leadscrew doesn't have a multiple-start thread. If it has a multi-start thread, then the stage will move more than the threads-per-inch by the number of thread starts. (The Z axis on my Thing-O-Matic has a four-start leadscrew, so I had to puzzle through this mess while figuring out the mechanics...) -- Ed http://softsolder.com -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Emc vs modern lcd monitors
On Sat, 2011-08-13 at 08:50 -0400, gene heskett wrote: under the vesa driver on an ati x1650 video card I ran into something like that on a Foxconn dual-core Atom D520 box that I'm sliding under my Thing-O-Matic: the default video setup sent 1024x768 dots to a 1280x1024 monitor and didn't offer anything better. The gotcha lay inside the Ubuntu 11.04 monitor settings, wherein unchecking the Show same thing on both monitors box suddenly revealed a second monitor! The Atom board has bone-stock Intel graphics with (to the best of my knowledge) no second video output, but the second monitor config showed all the myriad resolutions supported by the actual display. So I turned off the first monitor, picked 1280x1024 for the second monitor, the LCD went *blink*, and it's now fine. BTSOOM. Dunno if that applies to the VESA driver atop an ATI board, but it's certainly worth checking. -- Ed http://softsolder.com -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NAMES and Flash Drive devices
Copying to user-provided flash drives instead of handing out CDs is a great idea, especially because it makes the user participate actively rather than just grab reflexively. Although that's true, I think trying to do anything that smacks of system administration while on the show floor is doomed to humiliating failure. Most of the time, flash drives Just Work under Linux, but there are a wide variety of flash drives and some require specific care feeding. All of us have the personality flaw that requires us to solve problems and there's nothing more compelling than Showing Off Our Sysadmin Chops. The inevitable result is being elbow-deep in the guts of the OS, desperately trying to write the victim's USB drive, while causing untold collateral damage. Worst case: neither his USB drive nor your system are ever quite the same afterward -and- you blew half an hour getting there. Better to keep a stack of CDs under the table and hand one out to each interested prospect. While the CD might not be readable in his drive, you can fix that up after the fact. I would not, under any circumstances, use a Windows box for USB-drive duplication, as you'd almost certainly propagate the malware brought to you by an unsuspecting victim. Case in point: http://www.news.cornell.edu/stories/Oct08/bots.ws.html Trade-show Exhibitor Rule Number 1: Keep It Simple, Stupid! Works for me, anyway... -- Ed -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Puzzling Interpreter Error
I narrowed down your program into a very short one: Well, that's certainly easier to follow! Thanks for the flensing... grin -- Ed -- Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Speaking of metric
Given that money is power, I propose we measure report all financial changes in decibels. Hearing The Dow was down 3 dB yesterday wouldn't be very disturbing, would it? Your previously extortionate 20% credit card rate would drop to a mere 0.8 dB. But your CDs would yield 0.08 dB and let's not talk about your savings account (remember those?). OK, enough of this... -- Ed -- Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Cabin Fever Expo, York PA - January 15-17
... if anyone will be set up there again this year I'll bring my little Sherline CNC mill stack o' simpleminded projects again. If the conference room isn't full up, I'll do my Why CNC? An Introduction song dance routine, too. Gotta start printing some handouts pretty quick! -- Ed -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Probing and tool-change coordinates
I'm beating a tool-height probe switch into submission and want to make sure I'm not misinterpreting what I see; the relevant sections of the EMC2 version 2.3 doc are not entirely forthcoming. Here's how I think the pieces work... The coordinates stored by G30.1 in #5181-#5186 are always in native machine units, which are inches for my Sherline's 20- tpi leadscrews. Thus, to program a Z-axis move to the G30 height while using metric units, you'd use G0 Z[#5183 * 25.4] The tool dimensions stored in the classic tool table file are always in native machine units: inches for my machine. Thus, the tool lengths used by G43 H- (read from the table) will be in inches. The coordinates stored by G38.2 in #5061-#5069 are in whatever units the currently active G20/G21 mode calls for. Thus, with G21 metric units active, #5063 has the most recently probed Z-axis coordinate in millimeters. The tool length used by G43.1 K- is also in the current G20/G21 units, which will be millimeters when G21 is active. So, with G21 active, doing a G38.2 probe stores coordinates in millimeters, which are exactly what's needed for the subsequent G43.1 K- G43.1 K[#5063 - #_ToolRefZ] That's the way it seems to work and it makes perfect sense, although the collision of units in the G43 family was disconcerting. Do I have all that right? Now, is there any way for a G-Code (sub)program to determine which of G20/G21 is currently in effect? It Would Be Nice If the routine could pick its Z traverse level and probing speed based on the current units. Thanks... -- Ed -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Tool Table Size Limit?
In Axis 2.4.0, is it true that the tool table can have only 48-ish entries? I'm drilling circuit boards from Eagle layouts, using a script that extracts all the holes, sorts them by drill diameter, then visits each set in nearest-neighbor order. The problem is that Eagle's part libraries have a bewildering variety of hole diameters, which means you can't tell which drills you need for any given board, even rounded off to the nearest 0.001 inch. I use Txxx M6 and the Axis manual toolchanger, so my changer has access to all the drills mills in my cabinet. I figured I could shotgun the problem by simply listing all possible drill sizes from zero on up to about half an inch: larger than I'd want to drill with the Sherline, anyway. So I set up a tool table with 501 entries: T1000 P1000 Z1 D0.000 ... snippage ... T1020 P1020 Z1 D0.020 T1021 P1021 Z1 D0.021 T1022 P1022 Z1 D0.022 T1023 P1023 Z1 D0.023 T1024 P1024 Z1 D0.024 T1025 P1025 Z1 D0.025 ... snippage ... T1500 P1500 Z1 D0.500 The Z values are all 1 because I'm using a tool length probe to set the lengths on the fly. Unfortunately, Axis seems to truncate the tool table to about 48 entries. I'd expected that to not be a problem, because the doc gives this example: T9 P9 D23.75000 Z-0.300 ;You have a big tool changer Is there a user-level way to increase the maximum number of entries in the tool table? In practice, I use only a few drill sizes, because as far as I'm concerned 0.023 and 0.024 drills are identical. But the script doesn't know which drills I favor, so it lists everything it needs. I could stuff those sizes in the tool table, but a limit of 50 entries is perilously close to how many different drill sizes I actually use: I want to avoid having a separate tool table for each job! Thanks... -- Ed -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] tool length setting after toolchange
I got inspiration from these two sites I ran a quick-and-dirty test on the repeatability of my ugly tool length probe switch and discovered that it works surprisingly well: http://softsolder.wordpress.com/2010/04/17/ugliest-tool- length-probe-switch-repeatability/ Shorter link: http://wp.me/poZKh-15y A somewhat less hideous version of the probe subroutines lies buried in the G-Code accompanying this post: http://softsolder.wordpress.com/2010/06/15/water-bottle- spring-cap-repair/ Shorter link: http://wp.me/poZKh-1cI The trick is to put the G30.1 location far enough above the switch to accommodate the longest tool you'll use for that job. That's a gotcha I discovered on PCBs requiring both carbide drills in a 1/8 collet and twist drills in a Jacobs chuck. I recently got a sack of assorted SMD switches that (seem to) have more overtravel, but I'll procrastinate until I wreck the ugly one and must replace it. All in all, a tool length probe station isn't hard to build, at least if you're not writing up the project for Digital Machinist... [grin] -- Ed -- This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Speaking of Intel Atom 510 systems
It seems the Intel D510MO board works fine with the new 10.04 SMP version of EMC2, but one must wrap a box power supply around it, then kludge up a parallel port connector. Does anyone have an opinion on the $130 (+$5 shipping) Foxconn R3-D2 (or similar) barebones system? It has an Atom 510, a box with LPT connector on back, and a power supply, but needs $45 worth of DDR2/800 from Micron. Under $200 if you have a SATA drive in your parts box. Looks pretty close to plug-and-play with EMC2! Thanks... -- Ed -- Automate Storage Tiering Simply Optimize IT performance and efficiency through flexible, powerful, automated storage tiering capabilities. View this brief to learn how you can reduce costs and improve performance. http://p.sf.net/sfu/dell-sfdev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Speaking of Intel Atom 510 systems
Stay away from Foxconn, I went through three motherboards in a row That's the sort of experience I was looking for... This is surely the same Foxconn that makes all the fancy consumer electronics for all the Big Names, though. Perhaps those contracts pay for better reliability? Since we had other gear in that box that would need 12 V, This is for my simple Sherline setup, so plain old 120 VAC wall outlet power is just fine. I'd just conjure up a 12 VDC supply from the heap, but avoiding an AC-DC-DC conversion seems like a Good Thing. Thanks... -- Ed -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Automatic Z-axis touchoff ?
some G code snippets A somewhat improved version of the probe length routines are down near the bottom of this post: http://softsolder.com/2010/06/15/water-bottle-spring-cap- repair/ Shorter link: http://wp.me/poZKh-1cI I found that using the G59.3 coordinate system for probing prevented messing up the G54 coordinates. However, Bad Things can happen when you interrupt the program: it may leave you in G59.3, with the origin far away from the touch-off point in G54 that you're expecting to use. I'm still putzing around with the code, but that simple pushbutton switch works fine! -- Ed -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Eagle-to-HAL converter
Is anybody out there using Martin Schoeneck's Eagle2HAL configuration program? http://wiki.linuxcnc.org/emcinfo.pl?Eagle2HAL I'm writing up my Logitech gamepad Joggy Thing for Digital Machinist and realized that it's *much* easier to talk about circuit diagrams than lines of HAL code. I remembered Martin's work and decided that if I was going to draw schematics, I might as well get the HAL code for free. An email to the address given on the wiki page seems to have vanished (no bounce, but no reply after several days). A search for martin shoeneck eagle produces exactly one hit: http://martin.yaelbz.de/hal-write/ The main URL is essentially blank. Now, Martin may be on vacation, but ... it sure looks like an orphan project to me. So far, I've updated his hal-write.ulp script to handle (some of) the new devices introduced in EMC 2.4.x, added a few devices to hal-config.lbr, and am slowly figuring out how the whole thing works. I can take the changes far enough to scratch my itch, which is basically handling halui / hal_input device configuration. The intricacies of the schematic he used as a testcase / example / demo are *far* beyond what I need or can verify! Has anybody else been tinkering with Eagle2HAL? Any suggestions on what to do or how to do it? Thanks... -- Ed -- Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Eagle-to-HAL converter
On Tue, 2010-10-19 at 08:57 +0200, Martin Schöneck wrote: I only used it for my own configuration That's pretty much what I had in mind, too! I'll take a look at your changes and send you mine; between the two of us, perhaps we can scratch *both* our itches and make something useful to somebody else. More discussion off-list... Thanks! -- Ed -- Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Progress Report: Eagle Schematic to HAL code converter
I tweaked Martin's original Eagle ULP a bit, added some library devices, then built a schematic to connect my Logitech gamepad Joggy Thing as an EMC2 pendant. The grisly details, links to background info, and current files are at: http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/ Shorter link: http://wp.me/poZKh-1qh My intent is *not* to make a general do-it-all converter that can eat a schematic describing an entire machine and spit out a complete HAL file set, but to have something that can handle specific hardware gadgets that fit into an existing machine's HAL files. Basically, that's about all I understand how to do and have the machinery to test. It's reasonably usable as-is; I'll write up an overview of the pendant function for my Digital Machinist column. After some tweaking, adding more library devices, and cleaning up the internal doc, I'll figure out how to stuff the files back into the wiki. Suggestions, commentary, and funny stories are welcome... -- Ed -- Nokia and ATT present the 2010 Calling All Innovators-North America contest Create new apps games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Progress Report: Eagle Schematic to HAL code converter
On Sat, 2010-10-23 at 09:41 -0400, Kent A. Reed wrote: document existing configurations That's sort of what pushed me into getting the schematic converter running: I wanted to tweak my existing Logitech HAL configuration, but the prospect of figuring out how it worked seemed too painful for words. Using the loadrt and2 names=winken,blinken,nod option and naming the nets doesn't help much, because names don't make the interconnections any more obvious. Get that reverse-documentation thing running: I'll use it! -- Ed -- Nokia and ATT present the 2010 Calling All Innovators-North America contest Create new apps games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] slo-syn drivers
On Sat, 2010-11-13 at 14:38 +1100, Erik Christiansen wrote: The easiest way to increase the high-state output voltage, when it's only getting to three-and-a-bit volts, is to add a pull-up resistor. Be careful: the parallel port's output transistor probably doesn't have a particularly high output voltage rating. It'll almost certainly work fine with +5 V, but don't connect +12 V or (shudder) +48 V motor power supplies. The problem is not the forward current conducted when the transistor is on (which will be limited by the external circuit), but the voltage it must withstand when turned off (which is set by the external supply). The port pin may also be connected to ESD protection diodes and suchlike that will react unkindly to higher voltages. The general idea of an opto-isolator is to turn on an LED with a current (in the neighborhood of 10 mA) that can come from a low-voltage source that's switched by a low-voltage transistor like the one in the parallel port. What happens on the other side of the isolator doesn't affect the LED side. A bare optoisolator IC generally contains just the LED, so you must choose an external series resistor to limit the current to whatever the LED requires. However, if you're using a packaged optoisolator module, it probably has an internal resistor that's specified to work with a particular supply voltage. If that supply is supposed to be +12 V, then the LED won't get enough current from a +5 V supply. On the other side of the isolator, the output transistor will be good for operation at the (much higher) currents and voltages required by the motor drivers. Hope that helps a bit... -- Ed -- Centralized Desktop Delivery: Dell and VMware Reference Architecture Simplifying enterprise desktop deployment and management using Dell EqualLogic storage and VMware View: A highly scalable, end-to-end client virtualization framework. Read more! http://p.sf.net/sfu/dell-eql-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/13/2013 02:01 AM, Rafael Skodlar wrote: emerging personal 3D printing. G-Code is largely irrelevant for 3D printing: it's nothing more than an intermediate machine language between the slicer and the printer. The complexity of the motions required to produce a single layer of a model prevents anybody from writing or even modifying that code by hand: the slicer output is essentially a write-only code blob. A typical G-Code file for a small object contains half a megabyte of instructions; some of my models exceed 10 MB. For example, a 6 MB file has 141000 lines of G-Code. The slicers add short, hand-written G-Code routines to the beginning and end of the automatically generated G-Code blob, as well as insert shim routines at each layer and tool change. However, those routines perform stereotyped functions, such as axis home, nozzle wipe, motor disable, and camera trigger, that would be configured and written by the machine integrator rather than the machine operator. In the current DIY 3D printing world, one person may play both of those roles, but that era is coming to an end. In any event, unlike a subtractive machine tool, you can't pause a 3D printer, hack the G-Code, and fire it up again: time, tide, and molten plastic wait for no operator! To a reasonable approximation, a 3D printer's software stack eats solid models and produces plastic shapes, with no human intervention along the way. The typical user has no idea what G-Code is and really shouldn't get involved at that level: the high level language describes the object geometry, not the production method. -- Ed softsolder.com -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/13/2013 08:43 AM, andy pugh wrote: feed it STL rather than G-code Or, perhaps, an OpenSCAD model in source-code format, although you'd really want a better set of primitives that take advantage of arcs and suchlike. STL can't handle multiple colors / materials, has only triangle tesselation, and really shouldn't be the basis of further development. Just like G-Code, it'll live forever. [grin] doesn't let you control things like fill patterns. The newer, more consumer-oriented UIs have eliminated the myriad knobs we enjoy fiddling with, replacing them with a linear scale: fine, medium, coarse. It (or the original programmer) then chooses detailed settings based on the desired outcome, slices the model accordingly, and drives the printer. The real problem (and it *is* a real problem) then becomes generating the model geometry. Based on a very small sample, non-techies have trouble with 3D modeling and fancier CAD programs aren't the answer... -- Ed softsolder.com -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Easy 3D Re: Correct use of subroutines
On 05/13/2013 06:41 PM, Gregg Eshelman wrote: As for sketchup, unless it's seen some massive debugging and improvements, it's a very nice utility for creating some of the most fouled up 3D geometry Aye! But the objects *look* good, so they should print fine. Right? [wince] I've given up explaining why Sketchup isn't good for solid modeling, but I also no longer (try to) advise people who have a totally botched model what went wrong. That maximizes the total happiness. But Sketchup seems to be the least user-hostile program out there for folks who want to build things. OpenSCAD definitely isn't the answer and traditional CAD/CAM packages aren't for those folks, either. 'Tis a puzzlement. -- Ed softsolder.com -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/14/2013 07:08 PM, Eric Keller wrote: cut a hole in the family room floor My buddy Eks got a spectacular deal on a CNC mill that was too tall for his shop doorway: he had to dismount the head. Then, of course, there was no clearance for a hoist between head and ceiling, so he drilled a hole into the bedroom above the shop, put a plate on the floor, threaded a cable through the hole, hauled the hoist into the bedroom, and finished the job. As he put it, Heck, it's just a little hole under the bed. Nobody will ever notice it. He *does* have a wife, but she's used to his, ah, quirks... -- Ed softsolder.com -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/15/2013 10:46 AM, Gene Heskett wrote: he'd have to patch it Oh, he did, and IIRC cut the carpet as a flap that laid down neatly over the plug... he's that kind of guy. But even if had been a hardwood floor, well, he *is* that kind of guy. a job fixing them newfangled TV thingies Which, as nearly as I can tell from here, was a perfect fit! -- Ed softsolder.com -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BeagleBone + BeBoPr 3D Printing
On 06/01/2013 12:39 PM, Charles Steinkuehler wrote: I particularly like the acceleration control in LinuxCNC. It seems smoother than the Arduino code. At least on the Marlin firmware branch of the RepRap tree, the interrupt handler switches from one-step-per-interrupt to two/interrupt at 10 k step/s, then to four/interrupt at 20 k step/s, with abrupt step timing changes. These pictures show the step pulses to the X axis of my M2 during the ramp up to 450 mm/s at 5000 mm/s^2: https://www.dropbox.com/s/llrx2ik6vlq4ne9/X%20Axis%20450%20mm-s%2050%20mm%20-%20100%20us-div%2041.9%20ms%20dly.png https://www.dropbox.com/s/z4w4mg6wklnhvpm/X%20Axis%20450%20mm-s%2050%20mm%20-%20200%20us-div%2019%20ms%20dly.png The top trace is the motor winding current, the bottom trace is the Step pulse from the Arduino to the driver chip. The pulse clusters on the right side show how a single interrupt produces multiple steps, with the *average* rate remaining constant. However, speeds over about 112 mm/s (on the M2, anyway) have irregularly spaced Step pulses. I'm getting ready to disconnect the stock RAMBo board and hitch up LinuxCNC through a Mesa card and some stepper driver bricks to the M2; I think it'll be happier with regular Step pulses! -- Ed softsolder.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pendant recommendations
On 06/02/2013 03:16 PM, Dave wrote: If you are using a USB joystick as a pendant, which model are you using?? At least for my Sherline, a Logitech Dual-Action gamepad works wonderfully well. Here's the initial description: http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/ It gives direct four-axis control: XY on the left, ZA on the right. The buttons along the top provide full-speed rapids and the joysticks go down to crawling speeds. The HAL circuitry detects which joystick axis starts moving and locks out all the others, which prevents inadvertent motion along an axis that you've already lined up against an edge. The buttons don't have that lockout, so you can slew diagonally at high speed when that's appropriate. More HAL wiring uses two of the four buttons on the cable side as an E-stop button: you must push both buttons to trigger the stop. Agreed, software should be in the E-stop loop, but this is a Sherline... and I haven't ever used those buttons, come to think of it, because shutting off the power to the motor driver box works even better. How practical are USB joysticks for use as pendants on a milling machine? Probably not very, at least on a real milling machine that's spraying coolants and hot chips and piles of swarf all over. On the other hand, gamepads are cheap and easily replaceable, so you don't form a deep emotional attachment to them... -- Ed softsolder.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BeagleBone + BeBoPr 3D Printing
On 06/02/2013 03:50 PM, Karl Schmidt wrote: improved surface finish Not really. The slicing software adjusts the extrusion speed to match the XY speed, so the printer lays down a consistent amount of plastic no matter what speed you choose. That's the theory. In practice (and for my setup), higher speeds produce worse results. I think part of the problem is that the extruder must paste the current molten thread onto the previous layer, which requires enough dwell time to melt them firmly together; higher speeds work against that, so things don't stick nearly as well. On the other hand, faster non-printing moves reduce the amount of time the printer spends *not* printing, which is generally a Good Thing... until something shakes loose. -- Ed softsolder.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machinekit LinuxCNC-on-BeagleBone Beta Release
On 06/13/2013 06:12 PM, Charles Buckley wrote: 1) None of the current GUIs are really good for this, I've been using http://gcode.ws/ to visualize the actual paths within each layer, but that's probably too weird for most folks. Keeping the spool sync'd with the filament feed rate Recently bumped on my priority list: a powered filament feeder that automagically maintains the loop feeding the extruder, specifically to eliminate the usual feed tube with all the usual problems. The drive gear/pulley/wheel ramming filament into the hot end shouldn't also drag filament through a long tube! I think the simplest approach will be a filament position sensor so a HAL circuit can run the feed motor as needed to maintain the loop height. Those I've seen in the wild can benefit from HAL... Given a filament position station, I have a notion that would add two-axis filament diameter sensing. That can feed into a HAL component that would produce the filament area, which could then twiddle the feed on the fly. PWM to control the heating element. With control based on actual thermal properties and measurements, rather than by-guess-and-by-gosh. I just laid in a stock of DC-DC SSRs for that very purpose! 4) Temperature reading. Dan Newman wrote some code for the TC4 thermocouple shield that converts it to a USB HID hal_input device that I'll be using with my M2 printer: http://softsolder.com/2013/06/10/tc4server-eagle-hal-device/ pushing as much of the machining steps into hardware as possible. I really want to use automagic probing to compensate for platform shape positioning, because there don't seem any cheap, flat, removable hotplates out there. Methinks this one is easier to fix in the kinematics than in the metal; the shape of the platform changes as it heats up and nobody wants to measure a hot platform by hand. The M2 is rigid enough to do XY axis homing once per session and be done with it, but the general case probably requires that on a per-print basis along with the platform compensation. Let many LinuxCNC installations blossom! -- Ed softsolder.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machinekit LinuxCNC-on-BeagleBone Beta Release
On 06/15/2013 08:43 AM, Viesturs Lācis wrote: take a look at probekins, That's exactly why I'm so enthused about automagic platform probing: somebody else wrote the kinematics module! [grin] -- Ed softsolder.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machinekit LinuxCNC-on-BeagleBone Beta Release
On 06/15/2013 12:04 PM, Charles Buckley wrote: you could treat the spool feed as an additional axis whose feed rate is the same as the 4th axis. I think that would come heartbreakingly close to working, because the feed rate depends so much on the effective diameter of the gear/pulley/wheel. A teeny difference in hobbing will eventually (i.e., over the course of a dozen hours) cause the filament loop to either vanish or spill off the table: gotta wrap some feedback around the filament coming off the spool. But it might be close enough. Do a coarse positioning at the start of the print to put enough filament in the loop, then run the two motors in parallel for a few hours without feedback. That would eliminate the need to keep track of the filament while it flops around, which sound like a Good Thing. measuring the table temp for a heated table bed would also be good. The TC4 board also has four thermistor inputs... and I now have some 25 A DC-DC SSRs on hand. [grin] -- Ed softsolder.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machinekit LinuxCNC-on-BeagleBone Beta Release
On 06/15/2013 09:01 AM, Viesturs Lācis wrote: I have no idea, how difficult that actually might be. Given the requirement that it match the extruder nozzle height to within 0.05 mm (more or less) over a wide temperature range, it's a *very* tough problem. I think separating the nozzle height measurement from the platform probe operation might be the only way to make both of them work properly. I put a simple switch on my much-modified Thing-O-Matic's platform and poked it with the extruder nozzle to set the zero height position, but that's obviously a poor general solution: http://softsolder.com/2011/05/18/thing-o-matic-z-minimum-platform-height-switch/ Those platform pictures come from the days of ABS slurry on Planet Barbie... [wince] I think a pogo test pin with a side flag tripping an optical interrupter, perhaps through an amplifying lever, might be workable for platform probing, but I won't believe it until I run the numbers. -- Ed softsolder.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
