Re: [Emc-users] Just a Thought
Rayh wrote: So the easy answer is we could work up some sort of survey but most of our users, once they get the kinks/configurations worked out for their machines are never heard from again. One solution would be to have EMC bug the user after so many hours of run time (or so many days after installation) with a message box: Hi! You have been using EMC for some time now, and the developers would like to know what you think of it - good or bad - as well as what your setup is, what you produce, and where you live in the world. This is completely voluntary, but it will help us improve EMC. Please send feedback to address. Don't direct feedback to one of the sf.net lists, as people must register. I remember a couple people who asked their questions elsewhere because they felt sf.net was a pain. Mark - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought
--- Ray Henry [EMAIL PROTECTED] wrote: Hi guys. These posts bring to mind two long running thoughts, one directly related to EMC and one not quite so related. There was a heated discussion at that long ago FEST meeting in Ann Arbor when we created the EMC board. It was related to it's (us) becoming a legal entity. It was my opinion, still is, that we need such an entity so that we can accept and use contributions to the central benefit of the project -- contributions of code, cash, or whatever. I don't have a clue exactly how we would set up and prioritize cash or equipment worthy projects but many other open source projects have jumped that hurdle and are legal entities that accept and distribute cash. Doesn't sound like a bad idea to me. I think non-profit would be better, otherwise ya pay a lot in taxes. Plus being un-sueable has its benefits. I can think of some things the money could be used for: -Defray travel costs for developers who must travel long distances to get to the fest. -Ensure all developers have at least a small machine and some tooling (It's much easier to program and debug when you have actual hardware and have hands-on knowledge of how it's used) -Buy relatively high-dollar items to aid developers (fourth axis, renishaw probe, DSO, etc) Second thought is connected to the idea of web mediated manufacturing. Yep someone would need to take the lead at least on a per product basis. That person would probably never make the kind of wages that a product coordinator (vice president) might make in a traditional business. Probably the leader of that first product would not make much at all on it. There is a lot of manufacturing ability among us. We've got folk who can handle everything from electronic and computational circuits to metal working to assembly, distribution, accounting, and product liability. I like this one! However, as others have mentioned, there are the problems of payment and shipping. Shipping things like chunks of steel can be expensive - this could eat up profits. Or if it's fragile - a precision part made of soft metal, a circuit board, etc - and someone at your favorite shipper drop-kicks it into a wall because it's marked fragile. (Yes, I know someone who says they saw co-workers do this at an airport!) It would certainly be helpful for people who are getting started and need something made - say motor mounts - that maybe isn't easy to machine manually. Or they need circuit boards. or This sounds like the way RepRap fabbers are expected to spread: Get the parts for your own, then once the machine is complete, make several copies of those parts and ship them to other people so they can build their own. Exponential growth, if everyone with a RepRap does it. Mark - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought
Hi Ben On Wed, 2007-08-15 at 04:09 +, ben lipkowitz wrote: I want to make sure people are aware that these _are_ two distinct ideas and that one is not reliant on the other. I think it would be a bad idea for the two to be directly associated as there will eventually be conflicts of interest between the two entities. This doesn't mean that they can't help each other out when it is mutually advantageous. Exactly and we don't want to lay any extra burdens on the board to keep track of some sort of manufacturing -- other than software systems. Rayh - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
Hi Fenn, What is it that you imagined? Other than the fact that o-words are numeric (on my list of work to do is allowing them to be alphanumeric), what else would you like? Ken [EMAIL PROTECTED] Mark Kenny Products Company, LLC 55 Main Street Voice: (888)ISO-SEVO (888)476-7386 Newtown, CT 06470Fax: (203)426-9138 http://www.MarkKenny.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of ben lipkowitz Sent: Tuesday, August 14, 2007 10:26 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Macro Language Jeff, There most certainly is not any macro langauge, at least not one like I imagined. I bet someone figured that the O-word subroutine calls satisfied this feature request and moved it to the done list. I'm moving it back to the request list for now. Sorry about that. It sure was fun reading back over my old rambling super-future wishlist. -fenn Hi, The wiki.linuxcnc.org Emc features page has under the heading of DONE: macro language: support for a macro language, the macros written should be able to command motion io. the macros should have english-readable names and accept arguments and nesting added by: alex_joni (on IRC) and fenn I couldn't find any reference to Macros in the EMC2 v2.1 Users handbook. Does anyone know if they are available, and if so, where I can find documentation regarding them? Thanks, Jeff - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought-standards
I mean it's really hard to actually read it, once you've paid the $15k or so to actually get the documents. (You can get an idea by looking at the draft standards.) This is done so the people who wrote the standards get to keep their jobs as the people who read and explain the standards to you in plain english. As someone who writes standards, I have to disagree with this. It is extremely difficult to write standards, and the language comes from the need to say specific things in a general way that will be legally enforcable should the standard be adopted as law directly or by reference. Look at the NEC. In many places it refers to an ungrounded current carrying conductor, which in the vernacular is a hot. Problem is, hot is an ambiguous term that works fine in casual conversation but not in a standard. If you are trying to make a specific rule for all hots everywhere in the country you have to use generalized languge or it will not be enforceable. This brings up another point about forming a legal entitity. If EMC goes the non-profit route it would be better able to contribute to standards than individuals. Each standards making organization has it's own rules for participation, but most ANSI standards groups have a User interest category that often needs members. I have not looked into it in depth, and would be willing to if there is interest, but it is possible that EMC as an entity would be able to send a representative to the task group that maintains the G-code standard. That could have tremedous value. Thanks, Javid - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Encoders with steppers
Dear All, I am considering adding encoders and home switches to my Sherline CNC mill. I see 2 benefits: 1) Being *sure* of not loosing steps (estop, ...) 2) Using (low precision) home switches and the index of the encoder, I get *excellent* repeatability when homing. The mill is equipped with regular sherline steppers (135 oz-in, 1.8 degrees) and a P/N 8760 driver (800 step/rev.) connected to a parallel port. The steppers have a double ended 1/4 shaft. They are driving a 1mm master screw. Everything is connected to EMC2 running on a dedicated PC. All is actually working fine, with rapids of 450 mm/mn. I have a 4th axis on a turntable with the same stepper. I expect to use US digital E2 quadrature encoders with 400 CPR and index, giving a maximal theorical resolution of 1/400 mm, more than needed :) for a cost of about ~200$. I expect to use the E2 T model, which will be sticked on the rear of the stepper, in place of the handwheel, using the US digital centering tool. I expect to connect the outputs of the encoders to a second parallel port on a PCI card. My questions: 1) Is it stupid :) ? 2) Has anyone already done that? 3) Is a parallel post fast enough for reading the 4 axis encoder pulses at full speed? 4) Are there other encoders suitable? Is 400 CPR the correct value? 5) I suspect that HAL+classicladder is powerful enough to handle the *complex* homing (eg. Zero till the home switch trips (low precision microswitch), then forward to the encoder index pulse, for all joints). Am I right? If not, is it possible to program the homing sequence in C ? 6) Any tips in setting up HAL? PID tuning? Best mode for the parallel port? Any existing example? Thanks a lot, Michel - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Encoders with steppers
Michel Gouget wrote: Dear All, I am considering adding encoders and home switches to my Sherline CNC mill. I see 2 benefits: 1) Being *sure* of not loosing steps (estop, ...) 2) Using (low precision) home switches and the index of the encoder, I get *excellent* repeatability when homing. The mill is equipped with regular sherline steppers (135 oz-in, 1.8 degrees) and a P/N 8760 driver (800 step/rev.) connected to a parallel port. The steppers have a double ended 1/4 shaft. They are driving a 1mm master screw. Everything is connected to EMC2 running on a dedicated PC. All is actually working fine, with rapids of 450 mm/mn. I have a 4th axis on a turntable with the same stepper. I expect to use US digital E2 quadrature encoders with 400 CPR and index, giving a maximal theorical resolution of 1/400 mm, more than needed :) for a cost of about ~200$. I expect to use the E2 T model, which will be sticked on the rear of the stepper, in place of the handwheel, using the US digital centering tool. I expect to connect the outputs of the encoders to a second parallel port on a PCI card. My questions: 1) Is it stupid :) ? Basically - No - working via software - maybe 2) Has anyone already done that? The Taig closed loop controller does it via a modified step and direction board, which adds extra steps itself when it detects a missed step. If the required count is more than 200 steps adrift, it flags a fault. 3) Is a parallel post fast enough for reading the 4 axis encoder pulses at full speed? It probably can, but in combination with the pulse generation there may be a timing problem. You will only get the encoder edges sampled at the read rate, so while raw counts should be correct, there is a problem with fine control. As long as you do sample fast enough you should see all edges. 4) Are there other encoders suitable? Is 400 CPR the correct value? If my calculations are correct that will give you 1600 edges in quadrature which will be fine with your 800 step motor. You should see two steps per one that you request. 5) I suspect that HAL+classicladder is powerful enough to handle the *complex* homing (eg. Zero till the home switch trips (low precision microswitch), then forward to the encoder index pulse, for all joints). Am I right? If not, is it possible to program the homing sequence in C ? 6) Any tips in setting up HAL? PID tuning? Best mode for the parallel port? Any existing example? Not had the closed loop controller running with EMC, only the older open loop controller, but the hardware based solution does not require the encoder fed back to the computer anyway. -- Lester Caine - G8HFL - Contact - http://home.lsces.co.uk/lsces/wiki/?page=contact L.S.Caine Electronic Services - http://home.lsces.co.uk MEDW - http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/ Firebird - http://www.firebirdsql.org/index.php - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
He is probably looking for something a bit more industry standard. Like G65 simple macro call and G66 modal macro call with G67 cancel, with more normal looking argument assignment. Like this one using argument assignment type I. G65 P1001 Z-0.750 R0.100 D#101 A#100 F#9 Then there is assignment type II which is more like what EMC does, the order of the parameters determines which local variable gets which value but the parameters on the calling line are labled with A_ B_ C_ I_ J_ K_ I_ J_ K_ I_ J_ K_ ... until all 33 local variables are used. Then there is IF GOTO jumps and IF THEN loops In the following #110 is the number of the tool being used and 13000 is the base number of the tool table with the radius comp numbers. And #111 is the desired surface feet per minute, and the machine has a max spindle RPM of 8000. * (CALCULATE,RPM) #33=#[13000+#110]*2(TEMP) #19=[#111/[[3.1416*#33]/12]] IF[#19LT8000]GOTO11 #19=8000.0 N11 * Same thing using the IF THEN * (CALCULATE,RPM) #33=#[13000+#110]*2(TEMP) #19=[#111/[[3.1416*#33]/12]] IF[#19GT8000]THEN #19=8000.0 * and WHILE DO loops * #120= 2.000 #121= 0.010 WHILE[#120GT0.000]DO1 (code that does stuff with using #120) #120=#120-#121 END1 * and just a GOTO. * GOTO300 (code that does stuff) N300 (code that does more stuff) * Also access to the status of the current modal commands using variable numbers 4001 - 4021 and 4201 - 4221. Access to positon information using variables 5001 - 5104, so the macro can find out where the machine is currently siting and the endpoint of the block immediantly before the current one. And every machine I have written macros for has had access to the tool data table so the macro can use that data to positon the tools without hitting things. And all the rest of the stuff that comes with macro B, there is a macro A but it is a real pain to use. At 06:56 AM 8/15/2007, you wrote: Hi Fenn, What is it that you imagined? Other than the fact that o-words are numeric (on my list of work to do is allowing them to be alphanumeric), what else would you like? Ken [EMAIL PROTECTED] Mark Kenny Products Company, LLC 55 Main Street Voice: (888)ISO-SEVO (888)476-7386 Newtown, CT 06470Fax: (203)426-9138 http://www.MarkKenny.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of ben lipkowitz Sent: Tuesday, August 14, 2007 10:26 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Macro Language Jeff, There most certainly is not any macro langauge, at least not one like I imagined. I bet someone figured that the O-word subroutine calls satisfied this feature request and moved it to the done list. I'm moving it back to the request list for now. Sorry about that. It sure was fun reading back over my old rambling super-future wishlist. -fenn __ Andre' B. Clear Lake, Wi. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
Kenneth Lerman schrieb: What is it that you imagined? Other than the fact that o-words are numeric (on my list of work to do is allowing them to be alphanumeric), what else would you like? I don't know what Fenn would like to see, but here is a use case for such a language which I currently can't efficiently do in GCode (for one because of missing symbolic names for variables or missing calling parameters for O-words/functions/macros): Ask user to define minimum and maximum X, Y and Z positions by moving the tooltip to the relevant positions manually or by entering the values numerically. Then use a procedural (possibly recursive) approach to scan the work pieces surface with a touch probe. Speaking of this: I thought I read on this list about such a use, but I can't see any mentioning of a probe input in the list of pins in the integrator manual. Is there such a pin or would I need to abuse some other pin for that use? Regards, Sven - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Encoders with steppers
Michel Gouget wrote: Dear All, I am considering adding encoders and home switches to my Sherline CNC mill. I see 2 benefits: 1) Being *sure* of not loosing steps (estop, ...) 2) Using (low precision) home switches and the index of the encoder, I get *excellent* repeatability when homing. The mill is equipped with regular sherline steppers (135 oz-in, 1.8 degrees) and a P/N 8760 driver (800 step/rev.) connected to a parallel port. The steppers have a double ended 1/4 shaft. They are driving a 1mm master screw. Everything is connected to EMC2 running on a dedicated PC. All is actually working fine, with rapids of 450 mm/mn. I have a 4th axis on a turntable with the same stepper. I expect to use US digital E2 quadrature encoders with 400 CPR and index, giving a maximal theorical resolution of 1/400 mm, more than needed :) for a cost of about ~200$. I expect to use the E2 T model, which will be sticked on the rear of the stepper, in place of the handwheel, using the US digital centering tool. I expect to connect the outputs of the encoders to a second parallel port on a PCI card. My questions: 1) Is it stupid :) ? Encoders with steppers comes up every so often. I wouldn't call it stupid, but there are issues. If you lose a step because the load torque was more than the motor can deliver, a PID loop is not the answer. PID's response to feedback falling behind command is to drive the motor harder. With a stepper, that means step faster, which will just result in less motor torque and more lost steps. That said, there ARE benefits to encoders with steppers. If you avoid closing the PID loop, you can still use the encoder for position feedback. That would give you a following error if you ever lose steps. Better to find out right away instead of much later. It would also give you position feedback when the motors are disabled - basically a DRO during manual operation of the machine. The idea of using the index pulse for accurate homing is an excellent one. 2) Has anyone already done that? 3) Is a parallel post fast enough for reading the 4 axis encoder pulses at full speed? I'm not sure whether your 400 CPR encoders are 400 counts per rev or 400 cycles per rev. The latter would give you 1600 counts per rev. If the former, the parport is definitely fast enough - you have 800 steps per rev, and EMC's software based encoder counter can count at LEAST as fast as the software based step generator can step. If it is 1600 counts per rev, you need to do the math. A speed of 450mm/min with a 1mm screw is 450RPM. 450RPM/60 = 7.5 revs/second. Times 1600 counts per rev = 12,000 counts per second. Add 50% to allow for variations in the quadrature waveform and you get 18,000 samples per second minimum. That corresponds to a base period of 1/18000 = 55.5 microseconds. Just about any computer can do 50uS, and many people are running much faster base periods in the 20uS range. 4) Are there other encoders suitable? Is 400 CPR the correct value? That depends on what your goals are. With 800 step per rev drives, you might want at least 800 counts per rev on your encoder. 5) I suspect that HAL+classicladder is powerful enough to handle the *complex* homing (eg. Zero till the home switch trips (low precision microswitch), then forward to the encoder index pulse, for all joints). Am I right? If not, is it possible to program the homing sequence in C ? Actually, EMC2 can already do homing to an index pulse. It finds the switch, then continues on to the index. However there is a problem using that with steppers. In a servo system, when you reach the index pulse during that final stage of homing, the feedback value suddenly jumps to zero from whatever it was (the encoder counter resets on index). EMC is aware of that, and the position command ALSO jumps to zero at the same time. The result is that the command and feedback to the PID match, and everything works. But with steppers, you aren't using PID. When the feedback jumps to zero, EMC will make the command jump to zero, and the stepgen module will see and attempt to follow that command jump. One way to avoid that problem would be to run the stepgen in velocity mode with a normal PID loop. (The default is to use position mode which doesn't need a PID loop and lets you avoid tuning.) But doing that gets you into all the joys of PID tuning. An alternative approach would be to NOT reset the position feedback when the index pulse arrives. Instead, the index pulse would be ANDed with the home switch to provide a precision home switch. The problem with that approach is that the home switch would only be on for a very short interval. The homing code expects the home switch to turn on when you hit it, and not turn off again until you've backed off of it. I'm sure there is a way to solve that problem, but nothing springs to mind right now. Regards, John Kasunich
Re: [Emc-users] Macro Language
Hi EMC2 pros I was using 12 years IBH CNC: http://www.ibh-cnc.com They had so called Parameter sentences. A parameter sentence was always one Line, and startet with a star, for example: *N10 P43=4000 With this lines you could perform simple math like *+-/, sqr, If, goto etc, you had about 200 Parameters (P0...P200) This parameters are set global, this means you could simply call a subprogram to set machine zero points etc. the great advance was you could move the Machine fixture to another place, set the new values in the subprogram and run all old programs without any hassle. Parameter lines could not move any axis and set no M code I used it a lot for parameterize my code, eg set machine fixture zero point, speeds. distances etc. this Parametes could be used for setting distances, speeds etc in normal CNC code like: N10 X10 Y10 F=P43 I'm quite sure, also other manufacturers used some similar approach to get such results. In my opinion, this approach has the advantage, to be used without any restrictions for other CNC Code. Only my 5 cents. Hansjakob Am 14.08.2007 um 08:10 schrieb Jeff Pollard: Hi, The wiki.linuxcnc.org Emc features page has under the heading of DONE: macro language: support for a macro language, the macros written should be able to command motion io. the macros should have english-readable names and accept arguments and nesting added by: alex_joni (on IRC) and fenn I couldn't find any reference to Macros in the EMC2 v2.1 Users handbook. Does anyone know if they are available, and if so, where I can find documentation regarding them? Thanks, Jeff _ Find a local pizza place, movie theater, and more .then map the best route! http://maps.live.com/default.aspx? v=2ss=yp.bars~yp.pizza~yp.movie% 20theatercp=42.358996~-71.056691style=rlvl=13tilt=-90dir=0alt=-1 000scene=950607encType=1FORM=MGAC01 -- --- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
Ask user to define minimum and maximum X, Y and Z positions by moving the tooltip to the relevant positions manually or by entering the values numerically. Then use a procedural (possibly recursive) approach to scan the work pieces surface with a touch probe. Not the most advanced waz to do this, but it does a good job. http://cvs.linuxcnc.org/cvs/emc2/nc_files/gridprobe.ngc?rev=1.5;content-type=text%2Fplain Regards, Alex Joni - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
In emc2, these are known as parameters. The # character is used to set them or use their values. A parameter can be set with gcode like #43=4000 and used like this: X10 Y10 F#43 Math is supported: #43=[sin[45] * 300] and can be used anywhere a number would be used: X10 Y10 F[sin[45]*300] Jeff - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Encoders with steppers
I'm sure there is a way to solve that problem, but nothing springs to mind right now. how about a long limit switch (between 2 encoder indexes), just use a latch to toggle the state. to summarize: actual switch AND encoder index - toggle signal for the latch. latch output - emc home-sw input Regards, Alex - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
Cool! (I should read the Manual ;-)) Thanks anyway for telling me this feature. Hansjakob Am 15.08.2007 um 16:04 schrieb Jeff Epler: In emc2, these are known as parameters. The # character is used to set them or use their values. A parameter can be set with gcode like #43=4000 and used like this: X10 Y10 F#43 Math is supported: #43=[sin[45] * 300] and can be used anywhere a number would be used: X10 Y10 F[sin[45]*300] Jeff -- --- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
On Wed, Aug 15, 2007 at 03:16:35PM +0200, Sven Mueller wrote: Ask user to define minimum and maximum X, Y and Z positions by moving the tooltip to the relevant positions manually or by entering the values numerically. Then use a procedural (possibly recursive) approach to scan the work pieces surface with a touch probe. O-words are powerful enough to represent looping and recursion. Even before O-words, variables and expressions were available in emc's gcode. However, there is no gcode for allow the user to jog to a position then signal the program to continue. In fact, allowing something like this is a big change because running a program and ready to jog were designed as mutually exclusive, and this is deeply ingrained in many places including the GUIs and the task controller. (there is a similar division between running a program and homing an axis which makes the occasionally requested execute homing procedure gcode difficult to implement too) Jeff - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought
ben lipkowitz wrote: We tried to make a map where the users could place a pin at their location, I don't know what has happened to it. what ever has happened to the map ( google map if I remember right ) that even had pic's of users equipment ? the map is here: http://www.frappr.com/emc2 Oh, great! Another example of MicroSoft-centric web thinking. So, we have a Linux-based project, but you can't view the map without extensive gyrations to install MicroSoft spoofing software! I have to hang upside down by my toes to get Flash Player 9 to run. (I can't find a version of flash player 8 anywhere.) Nope, can't get it to run under Firefox either, which has flash player 9 installed (but may not be working right). Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought (a reply to Javid)
On Tue, 2007-08-14 at 20:45 -0500, Javid Butler wrote: I have been meaning to ask you about who fabricates your pcb's. I need to have a few RS-422 transmitter and receiver boards made. Kirk- Can you elaborate on what you need? ...snip Anyway, please tell us more about what you need and I'll see if there's anything that fits. Thanks, Javid Thank you for the offer. I want to use RS-422 between my encoders and controller encoder inputs. A rough description of the receiver board is: ~2 inch square with mounting holes on each corner. Opposite edges would have .2 inch screw binding terminals with one side having +12 V, Gnd, A out, B out, I out. The other having 12 V out, Gnd, A+ in, A- in, B+ in, B- in, I+ in, I - in. Centrally mounted would be a DS26C32, TO-92 5 V regulator and capacitor(s). That's it. I would like to make them as generic as possible so that I could trow them in where needed. A major concern is that the board mounting and wire connections be rugged. The transmitter boards would be the same except using a DS26C31 and .1 inch connectors. The board could be single sided with surface mounted components. You can see a first pass of this board here in the fourth picture down: http://www.wallacecompany.com/cnc_lathe/HNC/ I don't have a CNC mill yet, so I can't mechanically etch the boards I need. Making a batch of these boards might be a good project to see how pooling resources works. Kirk Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] EMC Features
Some of the recent discussion on wish lists and silent users etc. has prompted me to chime in here. I have been a lurker on this list for a long time, have played with EMC several times, and have dreamt of building a CNC machine (mill, drill, filament winder, or foam cutter, depending on which project I am consumed with at the time) for a long time. With the help of some like minded friends I have finally started building building a CNC Foam cutting machine (hot wire), and am interested in running it with EMC. It is almost done, and I have been using EMC to tune the axises etc. I have seen comments on these machines in the past on this list and the consensus seemed to be that EMC was not able to work with them. I am wondering if this has changed with EMC2/Axis. From browsing the .ini file, it looks like there are provisions for axis a,b,c, (I think, working from memory here) which are described in the comments as running parallel to x,y,z, is that what these are for? The other thing I am interested in building that I have not seen alot of discussion on is a filament winding machine. Again, I have looked at using EMC for this in the past, and came to the conclusion that it was not possible. But with the addition of the lathe/threading code, it seems that a filament winder should certainly be possible. I think the hardest part of this would be generating g-code for proper placement of the filaments/tows, but EMC2 should be capable of laying them down where you want while being indexed to the mandrel rotation once you have the g-code. Does anyone know of a g-code generator that would generate code for a filament winder that is free/open-source? Ryan Hulsker - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Encoders with steppers
- Original Message - From: John Kasunich [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Wednesday, August 15, 2007 8:59 AM Subject: Re: [Emc-users] Encoders with steppers snip PID's response to feedback falling behind command is to drive the motor harder. With a stepper, that means step faster, which will just result in less motor torque and more lost steps. Instead of PID speeding up the stepper, could it be connected to feed rate override and slow the feed until the stepper caught up? For example: a commanded feed of 10ipm, a step is missed, feedrate is reduced to 9ipm, proportional error adds 0.1 ipm, output is 9.1 ipm with trajectory feedrate at 9ipm, stepper will catch up. Perhaps it could be set up so if you missed enough steps for your feed rate override to be less than 50% you would get a following error. This could another can of worms with acel/decel, etc. I think I would prefer to just stop with a following error and be able to restart. Perhaps the feed was set too high, maybe the end mill is dull, or perhaps the acel/decel rates are too high. Either way, I would prefer to have a fault than ruin my part/vise/clamps/table/cutter/etc. Roger Neal - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Single Step'n
I have a confession to make. The only real CNC experience I have had was a three month stint a couple of years ago, mostly with a Fadal. (I really liked that machine, except for the tool changer randomly getting chips under the tool holder.) For the first run of a part, I recall reducing the feed rate and then single stepping through the program. I think there was a single step button you could activate before you hit the cycle start, so that the program would single step right from the first line. Whereas it seems that EMC will only single step after you start the program and several lines may have been executed. Does anyone have a favorite method to validate programs for the first run? Kirk Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EMC Features
Ryan Hulsker wrote: Some of the recent discussion on wish lists and silent users etc. has prompted me to chime in here. I have been a lurker on this list for a long time, have played with EMC several times, and have dreamt of building a CNC machine (mill, drill, filament winder, or foam cutter, depending on which project I am consumed with at the time) for a long time. With the help of some like minded friends I have finally started building building a CNC Foam cutting machine (hot wire), and am interested in running it with EMC. It is almost done, and I have been using EMC to tune the axises etc. I have seen comments on these machines in the past on this list and the consensus seemed to be that EMC was not able to work with them. I am wondering if this has changed with EMC2/Axis. From browsing the .ini file, it looks like there are provisions for axis a,b,c, (I think, working from memory here) which are described in the comments as running parallel to x,y,z, is that what these are for? Actually u, v, and w are the axes that are parallel to x, y, and z. They were recently added to EMC2 specifically for hot-wire foam cutters and wire EDM machines. They will be available in the version 2.2 release, or if you need them sooner you can get the current CVS version. The other thing I am interested in building that I have not seen alot of discussion on is a filament winding machine. Again, I have looked at using EMC for this in the past, and came to the conclusion that it was not possible. But with the addition of the lathe/threading code, it seems that a filament winder should certainly be possible. I think the hardest part of this would be generating g-code for proper placement of the filaments/tows, but EMC2 should be capable of laying them down where you want while being indexed to the mandrel rotation once you have the g-code. Does anyone know of a g-code generator that would generate code for a filament winder that is free/open-source? Ryan Hulsker Can you explain a little more about what is involved with filament winding? G33 threading passes are one way to sync tool motion with the spindle, but maybe not what you want, since each G33 pass waits for an index pulse - in a winding application you will still be winding fiber during that wait. Also coming in version 2.2 is feed-per-revolution mode, which might be an alternative to G33. It doesn't wait at the start of each pass, which is good. However, it is synced to spindle speed, not spindle position, so it might get slightly out of position at the end of a long pass. Another off-the-wall possibility would be to treat the rotating part as a rotary axis instead of a spindle. Then you could write g-code using X and A coordinates. However, if you are going to make thousands of revolutions on one part, your A axis will have a very long travel range. Not sure what the implications of that might be. Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Pluto (is not a planet)
How hard is the 8191 count per index limit on the Pluto controller? In other words, what are the chances of the count per index being increased? Kirk Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pluto (is not a planet)
'I think' that jepler has already increased that - I have 2540 line encoders/w index which are 10160 count that I have not tested yet but I think will work now.. I actually think he went about the encoder counting different so it isn't an issue. I am sure jepler will chime in here. :) sam - Original Message - From: Kirk Wallace [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Wednesday, August 15, 2007 12:18 PM Subject: [Emc-users] Pluto (is not a planet) How hard is the 8191 count per index limit on the Pluto controller? In other words, what are the chances of the count per index being increased? Kirk Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EMC Features
On Wed, Aug 15, 2007 at 01:08:26PM -0400, John Kasunich wrote: G33 threading passes are one way to sync tool motion with the spindle, but maybe not what you want, since each G33 pass waits for an index pulse - in a winding application you will still be winding fiber during that wait. Not quite true - adjacent G33 moves maintain synchronization while direction of motion changes. If the wire is .020, it seems like you could get the required motion simply with G33 Z2 P.020, G33 Z0 P.020, etc etc. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 5i20 Counter
The rating for the SoftDMC configuration is ~3 MHz if the filter is enabled, and faster if the filter is disabled. SoftDMC is not the config used with EMC2, but I think the encoder counter is the same, so I'd think it could count at 3 MHz or better, depending on noise filtering. - Steve Kirk Wallace wrote: Does anyone know off hand how fast the Mesa 5i20 encoder counters are? Kirk Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Controller to Amp Cable
Typically, how long can the cable be between the UniversalPWM controller and servo amps? The amps have differential PWM and direction inputs. I assume they are RS-422 compatible? (Just keep below 10 mA through 1 kOhms?) - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Macro Language
Alex Joni schrieb: Ask user to define minimum and maximum X, Y and Z positions by moving the tooltip to the relevant positions manually or by entering the values numerically. Then use a procedural (possibly recursive) approach to scan the work pieces surface with a touch probe. Not the most advanced waz to do this, but it does a good job. http://cvs.linuxcnc.org/cvs/emc2/nc_files/gridprobe.ngc?rev=1.5;content-type=text%2Fplain The point is: This is neither the most efficient nor the easiest to read way to achive this. What would really be nice would be a way to tell emc: move along X axis to 10(user units), stopping if probe is activated report position back Your example above leaves a few things to desire if you want to present the result to people: 1) a more readable program, with symbolic variable names for starters 2) a more flexible way for the user to specify the borders 3) a way to - for example - use several different sized probes to first get a quick rough image of what the piece looks like to then do the fine checks with smaller movements and this way hopefully also quicker and doing it in a single pass. Just like when you do a roughing and a finishing pass when milling. Also, as I mentioned in my previous mail, it's not clear how you need to wire the probe in hal: which input triggers the G38.2 to stop and print the position? I couldn't find that mentioned in the docs. Finally: I'm not necessarily talking about scripting in the place where currently Gcode is executed. Well documented script (perl, lua, ruby, python) language bindings to the movement and IO parts of emc2 would work just as well for me. Actually, what I would like to see is some relatively optimized version of surface scanning implemented with a GUI (perhaps in tkEMC or one of the other GUIs?). Since the existing GUIs already allow manual movements, I would think that all I would like to see (enter a position directly or by doing a manual movement, multiple scan passes with differently sized probe tips,...) should be possible using the same techniques currently used in the GUIs. Though I'm relatively good at C programming as well as Perl programming, I don't know how to build an interface between the two or how to use tcl. regards, Sven - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pluto (is not a planet)
The change in emc2.2 will be to allow any number of counts per index, so long as the maximum number of counts per servo cycle is within the permitted range. I made this change for sam and his 10160-count encoder, but I am not sure he's actually tested it with the updated version. Jeff - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Single Step'n
Quoting Kirk Wallace [EMAIL PROTECTED]: For the first run of a part, I recall reducing the feed rate and then single stepping through the program. I think there was a single step button you could activate before you hit the cycle start, so that the program would single step right from the first line. Whereas it seems that EMC will only single step after you start the program and several lines may have been executed. Does anyone have a favorite method to validate programs for the first run? It depends on the GUI you are using, but it's fairly similar. In TkEMC there's a button called 'validate', which will run through the program and check it against possible problems. In AXIS the same thing happens automatically while loading, and building the preview. To step though a program, you simply hit the Step button (both in TkEMC and in AXIS, might be different in Mini or Xemc, but I doubt that). btw, when I'm unsure of a program, I use touch-off in AXIS to set the Z really high (to clear the workpiece), and let it air-cut and watch the spindle and preview. (usually I also crank the feed override to something like 2-300% while doing that, because I get easily bored if it's running slow :). Hope this helps, Regards, Alex - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought
This could also be because Adobe havent released a 64bit version and the 32bit dosn't play nicely with any 64bit browsers. It has killed some things for me, but thats there loss Jason On Wed, 2007-08-15 at 21:56 -0400, Gene Heskett wrote: On Wednesday 15 August 2007, Jon Elson wrote: ben lipkowitz wrote: We tried to make a map where the users could place a pin at their location, I don't know what has happened to it. what ever has happened to the map ( google map if I remember right ) that even had pic's of users equipment ? the map is here: http://www.frappr.com/emc2 Oh, great! Another example of MicroSoft-centric web thinking. So, we have a Linux-based project, but you can't view the map without extensive gyrations to install MicroSoft spoofing software! I have to hang upside down by my toes to get Flash Player 9 to run. (I can't find a version of flash player 8 anywhere.) Nope, can't get it to run under Firefox either, which has flash player 9 installed (but may not be working right). Jon Its working here Jon, on an uptodate FC6 box, FF-2.0.0.6. Some of the lower scrolling images are contaminated though. As to exactly what incantation I used to make it work, it was months back up the log I've NDI what I did after all this time. About all I can say for sure is that my flash came from adobe, it is not a fedora rpm. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] MAX_DIO
I take it that EMCMOT_MAX_DIO is compiled into EMC (emcmotcfg.h). So if I need more than four m64pX's I would need to compile my own EMC? I suppose being able to compile my own EMC would be a good thing, but I'm trying to put it off for later. Thank you. Kirk Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MAX_DIO
On Wed, Aug 15, 2007 at 07:57:26PM -0700, Kirk Wallace wrote: I take it that EMCMOT_MAX_DIO is compiled into EMC (emcmotcfg.h). So if I need more than four m64pX's I would need to compile my own EMC? I suppose being able to compile my own EMC would be a good thing, but I'm trying to put it off for later. Thank you. Yes, unfortunately. You can build from cvs, or you could build a deb for yourself with just this change very easily (the debian way). Maybe we should increase it for 2.2. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Stepper dirves drom bsjd.com
hi all, just wondering if anyone has used a Q2HB44MA stepper drive ( http://www.bsjd.com/_en/products_show.asp?Productid=424 ) as I have just acquired some for my new mill. which is best a step/dir signal or CW/CCW signaling for steppers? Jason Cox - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepper dirves drom bsjd.com
On Thu, 2007-08-16 at 00:09 -0400, Gene Heskett wrote: On Wednesday 15 August 2007, Jason Cox wrote: hi all, just wondering if anyone has used a Q2HB44MA stepper drive ( http://www.bsjd.com/_en/products_show.asp?Productid=424 ) as I have just acquired some for my new mill. which is best a step/dir signal or CW/CCW signaling for steppers? Jason Cox Interesting Jason. That site doesn't seem to have a price list, so I'm wondering what the msrp of that one, and its 80 volt, 6 amp counterpart http://www.bsjd.com/_en/products_show.asp?Productid=428 might be by the time ups hands me a box of them here in the states? First appearance is they look solid. I got mine from an old banner sign printer that go thrown out (good stuff should never go to waist). Jason - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepper dirves drom bsjd.com
On Thursday 16 August 2007, Jason Cox wrote: On Thu, 2007-08-16 at 00:09 -0400, Gene Heskett wrote: On Wednesday 15 August 2007, Jason Cox wrote: hi all, just wondering if anyone has used a Q2HB44MA stepper drive ( http://www.bsjd.com/_en/products_show.asp?Productid=424 ) as I have just acquired some for my new mill. which is best a step/dir signal or CW/CCW signaling for steppers? Jason Cox Interesting Jason. That site doesn't seem to have a price list, so I'm wondering what the msrp of that one, and its 80 volt, 6 amp counterpart http://www.bsjd.com/_en/products_show.asp?Productid=428 might be by the time ups hands me a box of them here in the states? First appearance is they look solid. I got mine from an old banner sign printer that go thrown out (good stuff should never go to waist). Jason Thanks. To answer the original question, steppers are nearly always driven by step/dir signals. There are bipolar analogue setups about, but from my reading, quite a bit harder to tune. -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) The sky is blue so we know where to stop mowing. -- Judge Harold T. Stone - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Just a Thought
Gene Heskett wrote: On Wednesday 15 August 2007, Jon Elson wrote: ben lipkowitz wrote: We tried to make a map where the users could place a pin at their location, I don't know what has happened to it. what ever has happened to the map ( google map if I remember right ) that even had pic's of users equipment ? the map is here: http://www.frappr.com/emc2 Oh, great! Another example of MicroSoft-centric web thinking. So, we have a Linux-based project, but you can't view the map without extensive gyrations to install MicroSoft spoofing software! I have to hang upside down by my toes to get Flash Player 9 to run. (I can't find a version of flash player 8 anywhere.) Nope, can't get it to run under Firefox either, which has flash player 9 installed (but may not be working right). Jon Its working here Jon, on an uptodate FC6 box, FF-2.0.0.6. Some of the lower scrolling images are contaminated though. Well, I have a very outdated kernel, and outdated software on top of it. And, it is a big mess to change, as I have a lot of special sofware like FlightGear and VMware on this system. Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
