Re: [Emc-users] Beam Stiffening?

2024-05-23 Thread Dave Engvall
Great! Good to see your gut feeling was at least close. So nice to see a problem fixed w/o having to throw lots of $$ at it. D > On May 20, 2024, at 6:26 AM, Todd Zuercher via Emc-users > wrote: > > I did to exactly that. With the dial indicator on the ends vs the center, it > moved 10

[Emc-users] Vevor 12 nm 90 v stepper servo

2024-05-23 Thread Dave Engvall
Hi, Don’t know yet if I’m going to need this much power/torque but thot I’d ask anyway. Does anyone have opinions/experience with these? Tnx.

Re: [Emc-users] Beam Stiffening?

2024-05-14 Thread Dave Engvall
This is why I’m a chemist not an engineer. So how does it break out cost vs results, not exactly the same as weight. Even tho it is not an aircraft app working towards lightness may make sense. Thanks for the elucidation. Really happy it is not my problem. ;-) A Boeing engineer once commented

Re: [Emc-users] Beam Stiffening?

2024-05-14 Thread Dave Engvall
Hi all, Since I’m cheap I’d prototype with a fiberglass tube and fill with urethane foam. How much does the modulus change between a rectangular tube and elliptical geometry? Box with corner braces that are viscous damped. It all comes down to load and frequencies. I’m just the aging dummy in

Re: [Emc-users] Carving a spiral

2024-04-10 Thread Dave Engvall
https://www.britannica.com/science/spiral-mathematics Several options here, take your pick. Should be trivial to move it from floating pt to fixed. May have to scale to make it happy. ;-) Dave > On Apr 10, 2024, at 12:09 AM, gene heskett wrote: > > On 4/10/24 01:57, John Damme

Re: [Emc-users] Not so slight problem with spindle/tools

2024-03-20 Thread Dave Engvall
I have a very good Cat40 bolt to bench for installing tools but it is a nasty job to bolt the cat40 back into the spindle. If I could get access I’d pull the whole mess and replace (ideally). The stack is 105 washers so not too expensive. I’ll climb up on top and take another good look down

Re: [Emc-users] black list aliexpress

2024-03-20 Thread Dave Engvall
Considering how much of the Ru munitions have western chips proves how much of the world is willing to cheat for a buck. > On Mar 18, 2024, at 7:33 PM, gene heskett wrote: > > On 3/18/24 18:50, Jon Elson wrote: >> On 3/18/24 07:53, Todd Zuercher via Emc-users wrote: >>> Gene, >>> >>> In all

Re: [Emc-users] black list aliexpress

2024-03-19 Thread Dave Matthews
We had some training on traveling wave amplifier tubes, referred to as TWAT tubes back in Nike Hercules tech school in 1977. Dave ex MOS 22L On Tue, Mar 19, 2024 at 4:35 PM gene heskett wrote: > On 3/19/24 14:15, Robin Szemeti via Emc-users wrote: > > I purchased a couple of large t

Re: [Emc-users] Not so slight problem with spindle/tools

2024-03-19 Thread Dave Engvall
that is moving a lot of material in my case 8620 or 20 carbon steel, not too challenging. > On Mar 18, 2024, at 5:26 PM, andy pugh wrote: > > On Mon, 18 Mar 2024 at 21:13, Dave Engvall wrote: > >> So I’ve built Tee-nuts that will retain the cat40 assuming the >> M6 shcs hol

[Emc-users] Not so slight problem with spindle/tools

2024-03-18 Thread Dave Engvall
that will retain the cat40 assuming the M6 shcs hold. Planned use is to use small tools at max spindle speed. (4K). I need ideas to clamp the cat40 so I can torque down tool while in the spindle. Any inspiration? Dave ___ Emc-users mailing list Emc-users

Re: [Emc-users] Axis direction

2024-03-04 Thread Dave Engvall
> On Feb 5, 2024, at 6:19 PM, gene heskett wrote: > > On 2/5/24 18:26, John Dammeyer wrote: >> Thanks everyone. On the Unimat list there were a number of people really >> pushing the idea that Z+ was towards the chuck and it just didn't make >> sense. And as we all know, nowadays once can

Re: [Emc-users] where to nuy gears

2024-03-04 Thread Dave Engvall
Stockgears.com makes plastic gears. However, they seem expensive to me. Been years since I’ve seen a price list. Dave Ps. Had to pull out a small cutting board they made as advertising to remember the name. ;-) > On Mar 4, 2024, at 9:30 AM, andy pugh wrote: > > On Mon, 4 Mar 2024

Re: [Emc-users] Capto

2024-02-21 Thread Dave Engvall
Just cheat a bit. If you are belt driven then put a small idler/tensioner pulley arranged to be driven by the main belt. On the Mazak the servo motors had resolvers built in: with a 1:7 gear to increase the resolution . > On Jan 4, 2024, at 7:14 AM, Sam Sokolik wrote: > > We had gotten some

Re: [Emc-users] Run Fusion 360 on LInux

2023-12-01 Thread Dave Matthews
new mill and my old lathe. Dave On Fri, Dec 1, 2023 at 12:42 PM Thaddeus Waldner wrote: > Yeah, I saw this after I posted. I use an educational account. > > Cheapest option that works appears to be “startup” at $150/3 years. > > > > > On Dec 1, 2023, at 9:31 

Re: [Emc-users] Run Fusion 360 on LInux

2023-12-01 Thread Dave Matthews
Unfortunately not available to the hobbyist level account. Commercial and Education only. I go this when I logged in: Autodesk Education or Commercial Account Required Dave On Fri, Dec 1, 2023 at 9:26 AM Thaddeus Waldner wrote: > I’m not sure if you’ve seen this, but Fusion 360 now has a

Re: [Emc-users] CNC machining setup cards

2023-07-05 Thread Dave Matthews
I don't know if Thailand falls under the ITAR rules but they may be what you are hitting. If you can't install it you probably can't run it either. Autodesk loves the cloud and calling home. Dave On Wed, Jul 5, 2023, 22:41 Thomas J Powderly wrote: > thc all > > but the question s

Re: [Emc-users] CNC machining setup cards

2023-07-05 Thread Dave Matthews
Fusion 360 is still free for personal use. The limit is $1000 in sales. The do defeature some parts like rapids in tool paths. https://www.autodesk.com/products/fusion-360/personal Dave On Wed, Jul 5, 2023 at 2:40 PM gene heskett wrote: > On 7/5/23 13:29, Thomas J Powderly wrote: > &

[Emc-users] Wandering in the wilderness

2023-02-27 Thread dave engvall
file? Comments and advice please. Thanks. Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Progress!

2023-02-17 Thread dave engvall
ichuan.com/Private/ProductFiles/470763d1b2947213fdc2.pdf I know the board is well protected but I'm not one to just hook things up and hope the magic smoke is well contained. ;-) Thanks Dave ___ Emc-users mailing list Emc-users@lists.sourceforge

Re: [Emc-users] Running PathPilot on non-Tormach Machines

2023-01-26 Thread dave engvall
not a business opportunity! I must admit the subject prompted a lot of traffic. Dave On 1/26/23 8:45 AM, ken.stra...@sympatico.ca wrote: Nor do I! That is why I sent a pile of cash to Tormach instead of trying to roll my own. It just works and allows me to make chips without worrying about editing

Re: [Emc-users] Home switches for LinuxCNC on a Lathe

2022-12-04 Thread dave engvall
is. I think one can do something similar with glass scales but they tend to have several (3) guard lines each side of the R. Dave On 12/4/22 5:25 AM, Stuart Stevenson wrote: You might try the FADAL mill method. They use two arrows (markers). One on the moving member and one on the unmoving

Re: [Emc-users] Deep slot chip removal

2022-12-02 Thread dave engvall
pockets. However, just getting a good starting hole with a drill and then continuing with a mill is a smoother process.  In desperation mode blow air and catch the chips with vacuum much like a dentist does. Dave On 12/1/22 12:18 AM, Gregg Eshelman via Emc-users wrote: Flood coolant, air

Re: [Emc-users] losing encoder counts

2022-10-06 Thread dave engvall
with the spindle power carefully disabled and proceed with measurements. Notice I did not say much about a Chinese glass scale. Some are good some not so good. You pays your money and takes your chances. Dave On 10/5/22 7:53 PM, Jon Elson wrote: Wow, it gets deeper! It is NOT the encoder

Re: [Emc-users] XSY inverters (VFD)

2022-09-25 Thread dave engvall
ne Heskett. The controller for the spindle motor on the Mazak changes field current relative to spindle speed. I don't suppose there are any hooks to do the same for the XSY inverter. Just a random thought. Dave ___ Emc-users mailing list Emc-users@lists.sourc

Re: [Emc-users] missing tooth index questions..

2022-09-18 Thread dave engvall
This may be a bit wild  but use pll and trigger when the expected pulse doesn't appear. Maybe a bit far out of the box. Basically the reverse of synchronous detection. D On 9/18/22 1:59 PM, Sam Sokolik wrote: in case that screenshot didn't come through

Re: [Emc-users] Pocket milling

2022-09-18 Thread dave engvall
indeen! Spiral out from center going as deep as possible and constand radial engagement. When that is exhausted them try same idea on the triangular remanents. Then go back and test that against Jon Elson's code. Machining is an experimental science. Eh? Dave On 9/18/22 12:18 PM, Nicklas SB

Re: [Emc-users] Pocket milling

2022-09-18 Thread dave engvall
Hi Nicklas, Just a WAG, offset cutter maybe .25 mm from real corner and plunge then clean up in incrementally with a couple of passes to clean out the wings. I think most cam programs just take light passes including the finish pass. How stiff the spindle is and sharpness of the cutter are

Re: [Emc-users] Linuxcnc OEM?

2022-07-21 Thread dave engvall
One has to remember that emc was written not as a machine controller but to demonstrate the concept of communication between machines. In like manner steppers were an add-on. Linuxcnc is only alive today because of a critical mass of dedicated volunteer programmers. Dave On 7/21/22 2:32 AM

[Emc-users] Suggested replacement for Servo Dynamics SDFCC1020-12 amp?

2022-07-11 Thread Dave Matthews
the input on an a to d pin and pwm a mosfet. The arduino will go fast enough in fast pwm mode. Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Clausing NC Spindle drive belt tension and noise.

2022-07-04 Thread dave engvall
Indeed! Poly-Vee belts are acceptably quiet but of course then you need to rig an encoder. Probably a decent trade  off.  Available, not too expensive, transfer power well and seem to last. Years ago I made both of my pulleys. Dave On 7/4/22 10:05 AM, andy pugh wrote: On Mon, 4 Jul 2022

Re: [Emc-users] spindle problem

2022-06-27 Thread dave engvall
the loading low. I don't have much to lose. My chances of living more than 10 years more are not good and that assume health good enough to work in the shop. Dave On 6/27/22 7:25 AM, Todd Zuercher wrote: Gluing a spindle taper into a spindle sounds like a truly horribly idea. (I'd be more worried

Re: [Emc-users] spindle problem

2022-06-27 Thread dave engvall
Update: The drive lugs get in the way of a safety disk or ring or anything else. Epoxy looks more promising; just a semi-permanent solution. Note: Epoxy can always be removed with heat or chlorinated solvents but... Dave On 6/27/22 6:27 AM, dave engvall wrote: Back again; Since crawling

Re: [Emc-users] spindle problem

2022-06-27 Thread dave engvall
the radiator cap and run a new(er) one in. Still that brings all sorts of problems of its own. Hard to win. Back to the drawing table. ;-) Dave On 6/26/22 9:10 AM, andy pugh wrote: On Sun, 26 Jun 2022 at 15:45, dave engvall wrote: A couple of solutions present themselves but neither are ideal

Re: [Emc-users] spindle problem

2022-06-27 Thread dave engvall
to the side it indeed would be easier. What would have been not too difficult 10 years ago is somewhat intimidating now. 'Sides I'm not the best supervisor. Still thanks for the idea. Dave On 6/27/22 4:09 AM, Roland Jollivet wrote: Surely you could hire a buff mechanic from down the road

[Emc-users] spindle problem

2022-06-26 Thread dave engvall
(custom dia) to drill/ream. I have sets of ER20 and ER16 collets. Note: spindle is 4000 rpm and 5 HP geared. If anyone has a better idea I'm all ears. As usual TIA: I seem to be out of easy/ideal solutions. Dave ___ Emc-users mailing list Emc-users

Re: [Emc-users] cable connector for lcda357H stepper_servo

2022-05-23 Thread dave engvall
 Mucho thanks everyone for all the help. Ebay looked good but fallback would be Digikey. Note: I'm not tight, I just squeak a little when I walk. Have an order in for 5 in case I need spares. Dave On 5/23/22 2:40 PM, gene heskett wrote: On Monday, 23 May 2022 15:01:15 EDT Rob C wrote

[Emc-users] cable connector for lcda357H stepper_servo

2022-05-23 Thread dave engvall
more of it. ;-) Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Hight Frequency VFD

2022-05-19 Thread Dave Cole
and the Siemens drives are easier to use. Plus Siemens phone and website support is really good and free. Dave On Mon, May 9, 2022 at 2:58 PM Todd Zuercher wrote: > No, for some reason I hadn't checked with Siemens. One of our machines > even has a Siemens drive, but it's a gigantic thing that

Re: [Emc-users] Do pnp prox switches need a pulldown load R?

2022-05-12 Thread dave engvall
Indeed!  Positional is critcal and useful. D On 5/12/22 2:07 PM, Gregg Eshelman via Emc-users wrote: Go traffic lights in Japan used to be blue. There may still be some blue ones in out of the way places. When the country adopted the international color standard for traffic light colors,

Re: [Emc-users] OT but built on linuxcnc machines:) affordable color sensor for project (24v model)

2022-05-12 Thread dave engvall
I like the idea of a web cam, much better than single chips. Even better if one can split out the  RGB channels, in which case you get built-in filters. Still concerned about getting enuf contrast off a thin film of marker pen; fluorescence?  Glad it is someone else's problem. Dave On 5/11

Re: [Emc-users] Hight Frequency VFD

2022-05-09 Thread Dave Cole
Have you checked to see if Siemens can help you? In order to go that fast they will sell you a license to install in a more or less standard drive. I understand that high freq drives can be used for other things, like gas centrifuges. So they try to keep track of where they go. Dave On Tue, Apr

Re: [Emc-users] A bit OT: Looking for pinout for a Chinese Scale reader head

2022-05-08 Thread dave engvall
the handwheel for the ballscrew. This is a 1963 Cinci tracer converted to cnc and at this point back to manual. The handwheel checked to 0.001" re the  digital display. Clearly YMMV.  Best wishes. Dave On 5/8/22 7:59 AM, Mark wrote: Hi All, I've got an elderly Shumatech DR

Re: [Emc-users] Blown BOB and ???

2022-05-01 Thread dave engvall
m. My hand made it to the big red button ahead of the upper corner but knowing the axis estop limits were there and working gives piece of mind. Especially when the combined weight of the saddle and the table is 700 Kg. Dave On 5/1/22 8:59 AM, Chris Albertson wrote: There is a good c

Re: [Emc-users] Do we have an m-code with access to halcmd?

2022-04-29 Thread dave engvall
Being a suspicious kind of guy I'd hang an encoder on the shaft and measure it. Jon Elson makes an  interface that  passes thru the encoder counts on a panasonic servo motor with your electronics background you ought to be able to do the same for your servo. Just thinking out loud which usually

Re: [Emc-users] Controlling DC motors.

2022-04-10 Thread dave engvall
think that project only lasted a few years. pulsed 220 drifting avout an orchard was just too dangerous. Finally came the switch to sprinklers and orchard fans. and then grey smog  in the morning went away. No the old days were not necessarily the good old days. Dave On 4/10/22 8:31 AM

[Emc-users] custom | stock bearing nut

2022-04-05 Thread dave engvall
spent a fair amount of time searching the web but maybe (probably) someone else's  google foo is better than mine. As always TIA Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Homebuilt encoder

2022-03-31 Thread dave engvall
Works fine here. If someone had not commented I'd wouldn't  of had a clue. Dave On 3/31/22 12:54 PM, Martin Dobbins wrote: Perfect, thanks! Martin From: Lawrence Glaister very strange... working fine here. maybe try the http version... using firefox 98.0.2

Re: [Emc-users] Homebuilt encoder

2022-03-27 Thread dave engvall
At high rpm a resolver may make more sense ... and more $$. Depends. ?? Dave On 3/27/22 2:03 PM, ken.stra...@gmail.com wrote: Gene, do you have a part number for your high RPM Omron encoder? Maybe I can snag one... -Original Message- From: gene heskett Sent: March 27, 2022 4:49 PM

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-21 Thread dave engvall
. Dave On 3/21/22 7:46 AM, gene heskett wrote: On Monday, 21 March 2022 08:19:14 EDT Sam Sokolik wrote: Dad ground the ball screw nut.. everything fits nicely under the cross slide it seems.. Found a bit of aluminium to make a simple bearing block for 2 angular contact bearings.. https

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-18 Thread dave engvall
turns. ;-) And I might say adds confidence to the job. I actually did it because I wanted a check on the, still in progress, project of having stepper-servos on all three axes. More later, maybe much later. Dave On 3/18/22 7:32 AM, Sam Sokolik wrote: Thought about it... :) On Fri, Mar 18

Re: [Emc-users] Graceful pi shutdown, power off

2022-02-15 Thread dave engvall
Those 'smart sockets' can be really handy. I use one to control the startup of my 3 phase rotary converter. That way I can be in the shop and only have the converter running when I need 3 phase. In the house is a manual lockout switch for times when I know I won't need 3 phase. Dave On 2/15

Re: [Emc-users] need gcode maker

2022-02-14 Thread dave engvall
I typically have gone to West Marine for epoxy. 5:1 mix ratio with metered pumps. Good  idea about avoiding the glass expander/thickener micro bubbles. :-) Fast, med and slow catalyst available. Dave On 2/14/22 2:10 AM, Gregg Eshelman via Emc-users wrote: Modern epoxies like the ones sold

Re: [Emc-users] need gcode maker

2022-02-13 Thread dave engvall
up job of making those threads. Going thru the pain to do that is left as an exercise for the local shop. ;-)  Nothing is impossible for the person that doesn't have to make it work. Dave On 2/13/22 10:32 AM, ken.stra...@gmail.com wrote: Thread milling would be a good approach except that I

Re: [Emc-users] need gcode maker

2022-02-13 Thread dave engvall
Other options for buttress. DIN |  ANSI .. Either grind a tool out of M2 or equivalent or go shopping for inserts on the web surplus sites. They won't be cheap but a bit less hassle. Single point thread mill?? Lathe sound easier than milling it. Dave On 2/13/22 9:37 AM, ken.stra...@gmail.com

Re: [Emc-users] IJK vs R

2022-02-10 Thread dave engvall
but that does not solve some conditions. Can't win them all. Dave On 2/9/22 4:17 PM, andy pugh wrote: On Wed, 9 Feb 2022 at 19:30, dave engvall wrote: Hi, It would appear that the 'easy' way to compare the two methods would be to use sim or usrspace. That would get it plotted but I doubt

[Emc-users] IJK vs R

2022-02-09 Thread dave engvall
that calculates points along the way. A gentle or not so gentle nudge would be appreciated. Dave stepper  should work also since it really doesn't know if something is connected ... ___ Emc-users mailing list Emc-users@lists.sourceforge.net https

Re: [Emc-users] Trouble with arc error

2022-02-07 Thread dave engvall
band. Any proof and or experimental evidence? Just poking the bear. ;-). Dave On 2/7/22 1:01 PM, andrew beck wrote: One option is set your post processor to post radius not ikj values. That helped me once. They are much more forgiving On Tue, 8 Feb 2022, 09:48 Stuart Stevenson, wrote

Re: [Emc-users] What Would You Suggest?

2022-02-04 Thread dave engvall
Hi, I seem to remember a crank as in crankshaft lashup to drive the table. Personally I think the hydraulic setup is better but harder to achieve. The free lunch is hard to find. Dave On 2/4/22 9:11 AM, John Dammeyer wrote: From: Kenneth Lerman [mailto:ler...@se-ltd.com] The longitudinal

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

2022-02-03 Thread dave engvall
Yep! Brain dead, missed those. Dave On 2/3/22 8:33 AM, andy pugh wrote: On Thu, 3 Feb 2022 at 15:28, dave engvall wrote: At first glance it looks pretty good but lacks pci slots unless my eyes have fully given out. Ditto on disk interface. Assuming you mean https://www.onlogic.com/pd14ri

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

2022-02-03 Thread dave engvall
Greetings: At first glance it looks pretty good but lacks pci slots unless my eyes have fully given out. Ditto on disk interface. So unless the pport has a good EPP and therefore useful for 7i43 | USC | ppmc it is not a good deal. Just my tuppence. Dave On 2/2/22 10:43 PM, Chris Albertson

Re: [Emc-users] 2.8 or 2.9?

2022-02-02 Thread Dave Matthews
I am happily running 2.8.0 with 4 homing switches to auto align the gantry (Gatton CNC). Works great. At the moment I am cutting lexan candy molds for the wife. Dave On Wed, Feb 2, 2022, 00:38 Andy Howell wrote: > Hello, > > I maintain a gantry style CNC router for our high school

Re: [Emc-users] motherboard that plays well with 7i43

2022-01-28 Thread dave engvall
My thinking is that the 7i43 is best used for rt tasks with an EPP port, hence the problem. I should have been more explicit.   The plan is mb -> 7i43 -> 7i42 for stepper-servos. Dave On 1/28/22 11:17 AM, Chris Albertson wrote: On Fri, Jan 28, 2022 at 10:18 AM dave engvall wrote: h

[Emc-users] motherboard that plays well with 7i43

2022-01-28 Thread dave engvall
hi, I'm looking for users that are actually using a motherboard with a 7i43 and can recommend candidate boards from experience. Thanks in advance. Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists

Re: [Emc-users] miniature taper-lock type pulleys

2022-01-27 Thread dave engvall
the mini   5/8" fits the SEM servo motors I use. Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] miniature taper-lock type pulleys

2022-01-26 Thread dave engvall
I assume everyone knows about these. https://www.fennerdrives.com/trantorque/ Not cheap but tend to work. Dave On 1/26/22 8:30 PM, Ralph Stirling wrote: I had some problems today with a small XL timing pulley slipping on a NEMA17 stepper shaft due to the set screw loosening after running

Re: [Emc-users] rotary table re-engineeering

2022-01-23 Thread dave engvall
in the boonies was using house insulation foam for patterns but that generated a lot of plain carbon smoke so I don't know if they do that anymore. Good luck with your part however you do it. Dave On 1/23/22 10:56 AM, Chris Albertson wrote: What you give a foundry is typically the part you want

Re: [Emc-users] motor coolant for water cooled spindles.

2022-01-16 Thread dave engvall
. If you can keep the mist away from your lungs you might try isopropyl alcohol. HTH Dave On 1/16/22 1:42 PM, gene heskett wrote: On Sunday, January 16, 2022 4:01:01 PM EST andrew beck wrote: Why not just engine coolant Is that what you are using? I first started out with rv antifreeze

Re: [Emc-users] Very good software backlash control demo.

2022-01-04 Thread dave engvall
but not perfect. The X  does have a 40 K count/inch in quadrature encoder on it. Note: Chinese glass scales are now mounted on X and Y since the Accu-rite scales do not play well with the Chinese DRO. Cheers, Dave On 1/3/22 6:58 PM, Sam Sokolik wrote: This has been done at a bigger scale... (2

Re: [Emc-users] Choice of CNC conversions

2021-12-25 Thread dave engvall
, moderate look a head and a screaming fast rt in a dedicated rt chip. Properly done the motion module doesn't change much but a lot of task stuff wrapped around it does and that allow improvements as the focus of the programmers changes. Just my tuppence devalued by inflation. Dave On 12/25/21 1:40

Re: [Emc-users] Complex 6 axis robot arm.

2021-12-23 Thread dave engvall
off the temp for wimpy thermoplastics. ;-) Dave On 12/23/21 9:12 PM, John Dammeyer wrote: I bought one of these well over 30 years ago. http://www.autoartisans.com/armatron/SuperArmatron.jpg My sons played with it until either they were bored or it stopped working. It went back in the box

Re: [Emc-users] Harmonic Drive

2021-12-21 Thread dave engvall
Soaking the plaster of paris encased part in sodium bicarb in water should dissolve the POP. Use as much bicarb as the weight of the plaster of paris. I've  not tried this so YMMV. ;-) Dave On 12/21/21 1:34 AM, Gregg Eshelman via Emc-users wrote: One method of strengthening 3D printed

Re: [Emc-users] ER32 collet chuck

2021-12-07 Thread dave engvall
Apparently standard grade collets are grade A , AA collets are concentric to 5 um. https://www.parlec.com/Products/Tool-Holding/ER-Collet-Chucks/Collets/5-Micron-(AA)/Inch-(1) Dave On 12/7/21 4:16 PM, John Dammeyer wrote: Does anyone know the difference between the non AA and AA collets

Re: [Emc-users] Spindle positioning.

2021-11-21 Thread dave engvall
you don't need orientation then a stepper motor and a gear would seem to be as simplistic as one can get. Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo

Re: [Emc-users] Power Draw Bar

2021-11-15 Thread dave engvall
In converting my Mazak I just tied a toggle switch to the control line for the valve that ran the hydraulics for tool release. One hand on the switch and one on the tool. Rather crude but it worked until the belleville stack broke. Dave On 11/14/21 4:02 AM, Roland Jollivet wrote: On a BT30

[Emc-users] 7i90 ethernet link

2021-11-15 Thread dave engvall
Is anyone using ethernet as a link between linuxcnc and a 7i90? Comments and/help appreciated Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Project Progress

2021-11-04 Thread dave engvall
For the fussy or perfectionist water cool. Probably water cool the ballscrew as heat conduction will be far superior to trying  to cool the acetal nut. Yep! I just fell out of the trees and damaged my head. ;-) Dave On 11/4/21 2:46 PM, andy pugh wrote: On Thu, 4 Nov 2021 at 21:34, John

Re: [Emc-users] Project Progress

2021-11-04 Thread dave engvall
desert area and do not seem to have an odor problem. Obviously YMMV. Dave On 11/3/21 11:34 PM, John Dammeyer wrote: I used the big 1/2" one for the large pocket and the smaller 5mm one for the smaller pocket and profile. The surface finish, given my crappy cast aluminium, was really nice. My

Re: [Emc-users] Prox sensors and wiring

2021-11-04 Thread dave engvall
Hi Andy, I have a box of those connectors in a 6 wide and will get a box of 1 wide and two wide. My thoughts are when used outside in a marine environment to glop some 3M Scotchcoat on them. Of course that make them rather fixed but they are cheap. :-) Dave On 11/4/21 1:44 AM, andy pugh

Re: [Emc-users] Shortening motor shafts

2021-10-18 Thread dave engvall
I use 1/16" grinding discs all the time for such. I think I'd arrange to clamp the shaft  not the motor frame so as to reduce vibration on the bearings. It it amazing what those discs will do at reasonable speeds. Dave On 10/17/21 10:27 PM, andrew beck wrote: Quick and easy way is t

Re: [Emc-users] Replacing a handle.

2021-10-13 Thread dave engvall
on the broken side about half way to the knob. bolt down piece of Al and mil a rough +.01  to +.02 replacement; pin and epoxy to handle, finish mill to final dimensions. Done in two. Did I miss something obvious? Dave On 10/13/21 7:22 AM, Gene Heskett wrote: On Wednesday 13 October 2021 05:50:52

Re: [Emc-users] more dc servo questions

2021-09-22 Thread dave engvall
for the student. ;-) Now I'll shut up and go away. Dave On 9/22/21 11:28 AM, Chris Albertson wrote: So you are driving it with something like this? amazon.com/HiLetgo-BTS7960-Driver... <https://www.amazon.com/HiLetgo-BTS7960-Driver-Arduino-Current/dp/B00WSN98DC/ref=asc_df_B00WSN98DC/?tag=hyp

Re: [Emc-users] more dc servo questions

2021-09-20 Thread dave engvall
and runs on a 50 us clock. The manual is available online. Dave On 9/19/21 5:12 PM, Chris Albertson wrote: Is the PID controller running on the PC under LCNC or is this an external PID controller you built? What are the numbers, the loop period, motor speed and numer of encoder lines. and so on? I

Re: [Emc-users] jerk control

2021-08-25 Thread dave engvall
. Ray Henry used to talk about tuning by milling before we had good tools in emc. It could also be that he was dealing with analog controls. ;-) Dave On 8/23/21 5:51 PM, andrew beck wrote: Andy do you know what the tormach uses for more than 3 axis path blending? On Tue, Aug 24, 2021, 11:11

[Emc-users] jerk and a bit of humor

2021-08-23 Thread dave engvall
read all the way to the bottom for the humor. https://www.linearmotiontips.com/how-to-reduce-jerk-in-linear-motion-systems/ Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] M62/M63 with a pwm output possible?

2021-08-14 Thread Dave Matthews
but the black cat was very light. I think I need to back down the velocity as it is moving over the pure black area too fast to do anything. Dave On Fri, Aug 13, 2021 at 4:34 PM Todd Zuercher wrote: > You might need to use M67 to set the PWM value and M62 to turn it on/off. > > Todd Zuercher &g

Re: [Emc-users] M62/M63 with a pwm output possible?

2021-08-13 Thread Dave Matthews
generated. I will just need to dig around for the number to use with the M67. Dave On Fri, Aug 13, 2021, 18:28 Ralph Stirling wrote: > I'm also an EE. Class D audio amplifiers are filtered PWM. A motor > inductance also filters pwm to an analog value. Your laser modulation > inp

Re: [Emc-users] M62/M63 with a pwm output possible?

2021-08-13 Thread Dave Matthews
. Thanks. Dave On Fri, Aug 13, 2021 at 5:21 PM Ralph Stirling < ralph.stirl...@wallawalla.edu> wrote: > PWM *is* analog (0 to 1.0). In hal, you would connect motion.analog_out > (syntax likely wrong, going by memory) to a pwm value input. That would > feed the M67 value to your pw

Re: [Emc-users] M62/M63 with a pwm output possible?

2021-08-13 Thread Dave Matthews
at it wrong? The laser is PWM between 0 and 5v. Dave On Fri, Aug 13, 2021 at 4:34 PM Todd Zuercher wrote: > You might need to use M67 to set the PWM value and M62 to turn it on/off. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (

[Emc-users] M62/M63 with a pwm output possible?

2021-08-13 Thread Dave Matthews
ted with the M62 to be a PWM output? - Is there an example of how to do this? Dave ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Something went wrong.

2021-08-04 Thread dave engvall
way. Edit tool table or change tool  number for successive passes. Spring pass as necessary. Chip removal: compressed air or vacuum or both like the dental hygienist does for cleaning.  OK for one-offs but production needs a better idea. That's my tuppence; machining is an adaptive and dynamic

Re: [Emc-users] Something went wrong.

2021-08-02 Thread dave engvall
and all his cousins have invaded your shop. ;-) Where is the can of murphycide? Dave On 8/2/21 2:59 PM, John Dammeyer wrote: And here's the other side. Notice no stair stepping so with conventional milling it appears just enough of a load to not show edges. Really do need ball screws or maybe

Re: [Emc-users] Something went wrong.

2021-08-02 Thread dave engvall
Weird! Is it repeatable? Did the program use R or I,J? Just fishing? ;-) Dave On 8/1/21 7:25 PM, John Dammeyer wrote: The milling operation was set up to always be climb milling. Zero point for the center hole and the outside perimeter was the same. And yet it milled more away on the LH

Re: [Emc-users] electrical inspection pain

2021-07-28 Thread dave engvall
need approval in its former location. If there is no clear authority for what he is demanding then he is out in left field. Good luck. Dave On 7/28/21 1:22 PM, Dave Cole wrote: IMO, your building inspector is stepping way outside of his authority. His job is "building" inspection.

Re: [Emc-users] electrical inspection pain

2021-07-28 Thread Dave Cole
ir" legal counsel involved as well, and that costs $$, it sparks internal meetings.   Lots of paperwork, etc. Suddenly you turn into a plague on the department. I do industrial integration and have been doing it since 2003.   I have LinuxCNC machines running in plants everyday. But I'm

Re: [Emc-users] A new lathe encoder option.

2021-07-21 Thread dave engvall
l solution. In electronic terms lathe spindles are pretty slow and have a lot of angular momentum. Most lathe spindles rpm range is not a lot over 5-6 binary bits. Just late evening rattling the cage. (off coffee until sunrise). Dave Could you solve the noise issue with a phase-locked

Re: [Emc-users] A new lathe encoder option.

2021-07-21 Thread dave engvall
l solution. In electronic terms lathe spindles are pretty slow and have a lot of angular momentum. Most lathe spindle rpm range is not a lot over 5-6 binary bits. I've actually considered putting a disc brake on the spindle. Not exactly joking. Just late evening rattling the cage. Dave Could

Re: [Emc-users] A new lathe encoder option.

2021-07-20 Thread Dave Cole
Nice work! On 7/20/2021 6:00 PM, andy pugh wrote: I have added missing-tooth index to the software encoder (only in master). https://youtu.be/t48TnJQtbCw This opens up a number of large-bore encoder options, as this is the scheme used on crankshaft trigger wheels. options:

Re: [Emc-users] Code of Conduct

2021-07-17 Thread Dave Cole
helpful! Tread lightly! I think that LCNC has been a huge success and has helped humanity. Try and find something else you have done that has "helped humanity". That is BIG. Lets not blow it. Again, I want to thank those folks on this list who have helped me and others with LCNC. I rea

Re: [Emc-users] Meanwell SE600-48 Power Supply

2021-07-15 Thread Dave Cole
You may have a bad power supply.  Do you have any output voltage? I'd attach a load and see if it holds voltage.   I cant think of anything that should be clicking in there.   Arcing can sound like clicking. The spec sheet says nothing about fan control and I would expect they would flaunt

Re: [Emc-users] Settlement on CoC topic

2021-07-13 Thread Dave Cole
to ignore it. I recommend the same. Carry on. I don't think it is worth the brain space. Dave On 7/13/2021 10:30 AM, Greg Bernard wrote: Although I'm pretty much a "lurker" on this list, I have been reading it daily for 7 or 8 years and can't recall any instances of rudeness, bullying

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