Re: [Emc-users] Encoders

On Saturday 16 June 2018 21:40:08 jeremy youngs wrote: > Gene, it was an inference I knew you would get, all those years > working the dairy farm in upstate, I only cook with the real thing. > Having lost my grandma,mom and my brother now type 2 I strive really > hard to keep lean and sugar low. I

Re: [Emc-users] Encoders

Gene, it was an inference I knew you would get, all those years working the dairy farm in upstate, I only cook with the real thing. Having lost my grandma,mom and my brother now type 2 I strive really hard to keep lean and sugar low. I gave up sodas, heavy drinking, breads and anything else with un

Re: [Emc-users] Encoders

I followed the link and was shocked at the price. Try Digikey. They are $0.83 and you get them fast as they are a US supplier. Check the data sheet to see if they work for you. On Sat, Jun 16, 2018 at 11:49 AM jeremy youngs wrote: > Thank you Gene, > eBay item # 302357383187 > These correct?

Re: [Emc-users] Encoders

On Saturday 16 June 2018 19:42:14 jeremy youngs wrote: > On Sat, Jun 16, 2018, 5:53 PM Gene Heskett wrote: > > On Saturday 16 June 2018 14:48:27 jeremy youngs wrote: > > > Thank you Gene, > > > eBay item # 302357383187 > > > These correct? If so I will get them coming. > > > > Thats 2 for 11 buc

Re: [Emc-users] Encoders

On Sat, Jun 16, 2018, 5:53 PM Gene Heskett wrote: > On Saturday 16 June 2018 14:48:27 jeremy youngs wrote: > > > Thank you Gene, > > eBay item # 302357383187 > > These correct? If so I will get them coming. > > Thats 2 for 11 bucks, for that he ought to cover the postage. But yes, > thats the on

Re: [Emc-users] Encoders

On Saturday 16 June 2018 14:48:27 jeremy youngs wrote: > Thank you Gene, > eBay item # 302357383187 > These correct? If so I will get them coming. Thats 2 for 11 bucks, for that he ought to cover the postage. But yes, thats the one I had in mind. > On Sat, Jun 16, 2018, 12:54 PM Gene Heskett

Re: [Emc-users] Encoders

On Saturday 16 June 2018 14:06:51 Chris Albertson wrote: > On Sat, Jun 16, 2018 at 1:23 AM Gene Heskett wrote: > > On Friday 15 June 2018 23:53:03 Chris Albertson wrote: > > > > > > By using pdm/pwm in the pwmgens. At 50 kilohertz, then integrating > > that to get your analog voltage. But no not

Re: [Emc-users] Encoders

Thank you Gene, eBay item # 302357383187 These correct? If so I will get them coming. On Sat, Jun 16, 2018, 12:54 PM Gene Heskett wrote: > On Saturday 16 June 2018 13:00:08 jeremy youngs wrote: > > > A quick Google, digikey and eBay search turned up nothing for an if357 > > , or an irf 357 . Any

Re: [Emc-users] Encoders

he apparently searched for 'if' which isn't going to work On Sat, Jun 16, 2018 at 1:53 PM, Gene Heskett wrote: > On Saturday 16 June 2018 13:00:08 jeremy youngs wrote: > > > A quick Google, digikey and eBay search turned up nothing for an if357 > > , or an irf 357 . Any other suggestions? > > Di

Re: [Emc-users] Encoders

On Sat, Jun 16, 2018 at 1:23 AM Gene Heskett wrote: > On Friday 15 June 2018 23:53:03 Chris Albertson wrote: > > > By using pdm/pwm in the pwmgens. At 50 kilohertz, then integrating that > to get your analog voltage. But no not pass the raw signal thru an > opto-isolator, the control linearity wi

Re: [Emc-users] Encoders

On Saturday 16 June 2018 13:00:08 jeremy youngs wrote: > A quick Google, digikey and eBay search turned up nothing for an if357 > , or an irf 357 . Any other suggestions? Did I do a "typu"? Or is lower case confusing the issue. s/b an LF357. Or if you want the most stable, highly tested version,

Re: [Emc-users] Encoders

A quick Google, digikey and eBay search turned up nothing for an if357 , or an irf 357 . Any other suggestions? -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sd

Re: [Emc-users] Encoders

On Sat, Jun 16, 2018, 3:23 AM Gene Heskett wrote: > On Friday 15 June 2018 23:53:03 Chris Albertson wrote: > > > On Fri, Jun 15, 2018 at 7:58 PM Gene Heskett > wrote: > > > On Friday 15 June 2018 20:20:20 jeremy youngs wrote: > > > > > > Aerotech mentions > > > using 741's (op-amps) but the gain

Re: [Emc-users] Encoders

On Friday 15 June 2018 23:53:03 Chris Albertson wrote: > On Fri, Jun 15, 2018 at 7:58 PM Gene Heskett wrote: > > On Friday 15 June 2018 20:20:20 jeremy youngs wrote: > > > > Aerotech mentions > > using 741's (op-amps) but the gain of a 741 above 10 hz falls like a > > rock, and that leaves the n

Re: [Emc-users] Encoders

On Fri, Jun 15, 2018 at 7:58 PM Gene Heskett wrote: > On Friday 15 June 2018 20:20:20 jeremy youngs wrote: > > Aerotech mentions > using 741's (op-amps) but the gain of a 741 above 10 hz falls like a > rock, and that leaves the nyquist phase v stability angles in doubt. If the paper suggests us

Re: [Emc-users] Encoders

On Friday 15 June 2018 20:20:20 jeremy youngs wrote: > Always another hurdle . Lol. I abandoned the h bridge plan for now as > I am lacking sufficient power supply. I have 2 aerotech 4020 linear > drives . The issue is they need tachometer feedback and it appears > though the drive isn't configure

Re: [Emc-users] Encoders

Gmail is queing my messages for some reason. I apologize if this double posts. Always another hurdle . Lol. I abandoned the h bridge plan for now as I am > lacking sufficient power supply. I have 2 aerotech 4020 linear drives . The > issue is they need tachometer feedback and it appears though the

Re: [Emc-users] Encoders

Always another hurdle . Lol. I abandoned the h bridge plan for now as I am lacking sufficient power supply. I have 2 aerotech 4020 linear drives . The issue is they need tachometer feedback and it appears though the drive isn't configured for armature feedback. So the question is, is there a readil

Re: [Emc-users] Encoders

5ext. 2031 -Original Message- From: jeremy youngs [mailto:[email protected]] Sent: Monday, June 04, 2018 12:05 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Encoders > > No Index??? Seems like it would be handy. It appears to have an index slot in the glass

Re: [Emc-users] Encoders

> > No Index??? Seems like it would be handy. It appears to have an index slot in the glass plate , but not enough wires 🤔🤔🤔 OTOH, for XYZ, not a hard and > fast requirement as long as the home switches are good. I have 5 of those inductive pickups we were talking about a few months back, I t

Re: [Emc-users] Encoders

On Sunday 03 June 2018 22:31:32 jeremy youngs wrote: > Update, I pulled this other ametek motor apart. And it had a glass > disc encoder, only 4 wires and clearly labeled a,b,5, gnd , so no > blown opto when I hooked it up. The glass disc said 1000 on it so I'm > presuming it's a 1000 PPR encoder,

Re: [Emc-users] Encoders

Update, I pulled this other ametek motor apart. And it had a glass disc encoder, only 4 wires and clearly labeled a,b,5, gnd , so no blown opto when I hooked it up. The glass disc said 1000 on it so I'm presuming it's a 1000 PPR encoder, I will check part numbers tomorrow . Hooked it to 7i90 and it

Re: [Emc-users] Encoders

Yes, they have Mac, Linux and Windows version of the software. Closed source but free from Saleae. The $8 clone is just a tiny uP that reads 8 input pins really fast and puts the data on USB. Al the smarts is in the software. Saleae makes some really nice ones that use the same software but ha

Re: [Emc-users] Encoders

The device is a clone of the Saleae analyzer so it works with their software https://www.saleae.com/downloads/ There is also some open source software that works with it https://sigrok.org/wiki/Main_Page On Fri, Jun 1, 2018 at 9:40 AM, Greg Bernard wrote: > Interesting. What software do you use

Re: [Emc-users] Encoders

On Friday 01 June 2018 12:32:09 Chris Albertson wrote: > On Thu, May 31, 2018 at 5:38 PM, Gene Heskett wrote: > > On Thursday 31 May 2018 19:45:24 jeremy youngs wrote: > > > Encoders in hand, shaft turned and mounted, it looks good, 3 more > > > to do . encoderawcount.jpg > > >

Re: [Emc-users] Encoders

Interesting. What software do you use with that? On Fri, Jun 1, 2018 at 11:32 AM, Chris Albertson wrote: > On Thu, May 31, 2018 at 5:38 PM, Gene Heskett > wrote: > > > On Thursday 31 May 2018 19:45:24 jeremy youngs wrote: > > > > > Encoders in hand, shaft turned and mounted, it looks good, 3 m

Re: [Emc-users] Encoders

On Thu, May 31, 2018 at 5:38 PM, Gene Heskett wrote: > On Thursday 31 May 2018 19:45:24 jeremy youngs wrote: > > > Encoders in hand, shaft turned and mounted, it looks good, 3 more to > > do . encoderawcount.jpg > > >w?usp=d

Re: [Emc-users] Encoders

On Thursday 31 May 2018 21:58:49 jeremy youngs wrote: > On Thu, May 31, 2018, 19:39 Gene Heskett wrote: > > On Thursday 31 May 2018 19:45:24 jeremy youngs wrote: > > > Encoders in hand, shaft turned and mounted, it looks good, 3 more > > > to do . encoderawcount.jpg > > >

Re: [Emc-users] Encoders

On Thu, May 31, 2018, 19:39 Gene Heskett wrote: > On Thursday 31 May 2018 19:45:24 jeremy youngs wrote: > > > Encoders in hand, shaft turned and mounted, it looks good, 3 more to > > do . encoderawcount.jpg > > >w?usp=drives

Re: [Emc-users] Encoders

On Thursday 31 May 2018 19:45:24 jeremy youngs wrote: > Encoders in hand, shaft turned and mounted, it looks good, 3 more to > do . encoderawcount.jpg > w?usp=drivesdk> That does look pretty good at first glance. I can't read

Re: [Emc-users] Encoders

A,b and index. I'm beat for the day , I will follow up tomorrow, been really busy in shop, beginning an ls swap and restoration of an 83 3/4 ton Chevy for a customer. That will limit my ability to get this done , but will provide much needed funds. Also, I won the bid on that 6 horse bldc 37 NM mo

Re: [Emc-users] Encoders

On 1 June 2018 at 00:45, jeremy youngs wrote: > Encoders in hand, shaft turned and mounted, it looks good, 3 more to do . > encoderawcount.jpg > Is that with only one channel connected? Rawcounts should increa

Re: [Emc-users] Encoders

Encoders in hand, shaft turned and mounted, it looks good, 3 more to do . encoderawcount.jpg -- Check out the vibrant tech community on

Re: [Emc-users] Encoders

On Sat, May 26, 2018 at 9:23 AM, Jon Elson wrote: > On 05/26/2018 10:54 AM, Chris Albertson wrote: >> >> I had to look up the link to see how it is possible for an encoder to >> cause lag. Only by not having enough resolution for low speed >> operations >> > The AMT encoders use interpolation of

Re: [Emc-users] Encoders

On 05/26/2018 10:54 AM, Chris Albertson wrote: I had to look up the link to see how it is possible for an encoder to cause lag. Only by not having enough resolution for low speed operations The AMT encoders use interpolation of a very low resolution basic sensor. They must have some kind of

Re: [Emc-users] Encoders

On Sat, May 26, 2018, 10:54 Chris Albertson wrote: > I had to look up the link to see how it is possible for an encoder to > cause lag. Only by not having enough resolution for low speed > operations > > Did you notice the 20 week lead time and the note about problems at the > factory? > I did

Re: [Emc-users] Encoders

I had to look up the link to see how it is possible for an encoder to cause lag. Only by not having enough resolution for low speed operations Did you notice the 20 week lead time and the note about problems at the factory? On Sat, May 26, 2018 at 4:40 AM, andy pugh wrote: > On 25 May 2018 at

Re: [Emc-users] Encoders

On 05/26/2018 06:40 AM, andy pugh wrote: On 25 May 2018 at 07:24, jeremy youngs wrote: https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d Any thoughts? Seems like a good solution I was expecting Jon Elson to chip in. I think he foun

Re: [Emc-users] Encoders

On Saturday 26 May 2018 07:40:05 andy pugh wrote: > On 25 May 2018 at 07:24, jeremy youngs wrote: > > https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46 > >O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d Any thoughts? Seems like > > a good solution > > I was expecting Jon Elson to c

Re: [Emc-users] Encoders

On Sat, May 26, 2018, 06:41 andy pugh wrote: > On 25 May 2018 at 07:24, jeremy youngs wrote: > > > > https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d > > Any thoughts? Seems like a good solution > > I was expecting Jon Elson to chip

Re: [Emc-users] Encoders

On 25 May 2018 at 07:24, jeremy youngs wrote: > https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d > Any thoughts? Seems like a good solution I was expecting Jon Elson to chip in. I think he found an odd accelleration lag with these en

Re: [Emc-users] Encoders

These will be here late next week -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mail

Re: [Emc-users] Encoders

On Fri, May 25, 2018, 07:01 Gene Heskett wrote: > On Friday 25 May 2018 02:24:57 jeremy youngs wrote: > > > New thread, as I seem to be done getting the 7i90 functional. > > These are capacitive and seem to have good response, universal and > > programmable. And cheap and u.s. stock, 15.3 mm is t

Re: [Emc-users] Encoders

On Friday 25 May 2018 02:24:57 jeremy youngs wrote: > New thread, as I seem to be done getting the 7i90 functional. > These are capacitive and seem to have good response, universal and > programmable. And cheap and u.s. stock, 15.3 mm is the largest of them > I can find, and I don't understand wha

Re: [Emc-users] Encoders

>From looking at the mechanical drawings on the datasheet, it looks like the axial/radial mount refers to the direction of the connector pins. On Fri, May 25, 2018 at 1:24 AM, jeremy youngs wrote: > New thread, as I seem to be done getting the 7i90 functional. > These are capacitive and seem to

[Emc-users] Encoders

New thread, as I seem to be done getting the 7i90 functional. These are capacitive and seem to have good response, universal and programmable. And cheap and u.s. stock, 15.3 mm is the largest of them I can find, and I don't understand what they say about axial or radial mount . I will call them tom

[Emc-users] Encoders

Hi all. These ametek motors have undefined encoders on them. One is just an empty 4 pin. The other has a flat 4 pin ribbon. I'm awaiting my 7i42 . The flat ribbon is marked with a hot lead. I also have a 5v current limited supply on order. I'm thinking set voltage low and shuffle ground until I fin

Re: [Emc-users] Encoders

On Dec 13, 2011, at 11:03 PM, Jon Elson wrote: > Peter C. Wallace wrote: >> Theres a FAQ fom AMT that mentions a jumper on the card that can be removed >> to approximately 1/2 the filter time constant (at the expense of more noise) >> > And, that is real hard to do once the hub has been glued!

Re: [Emc-users] Encoders

On Dec 13, 2011, at 11:08 PM, Jon Elson wrote: > Tom Easterday wrote: >> >> These are versions without the velocity command at 250ipm and ~1500ipm > Oh, at 1500 IPM, maybe you need to turn up the servo thread to faster > than 1 ms, or > have you tried that already? We did try that. But, I am o

Re: [Emc-users] Encoders

Tom Easterday wrote: > > These are versions without the velocity command at 250ipm and ~1500ipm Oh, at 1500 IPM, maybe you need to turn up the servo thread to faster than 1 ms, or have you tried that already? Jon -- Clou

Re: [Emc-users] Encoders

Tom Easterday wrote: > On Dec 13, 2011, at 1:09 PM, Jon Elson wrote: > >> If you can send me a picture form Halscope, I can compare it to what I >> get. >> > > See: > http://bgp.nu/~tom/pub/XPosErr-VelCmd.png > Doesn't look that bad. I'm a little surprised the FF2 can't make it bett

Re: [Emc-users] Encoders

Peter C. Wallace wrote: > Theres a FAQ fom AMT that mentions a jumper on the card that can be removed > to approximately 1/2 the filter time constant (at the expense of more noise) > And, that is real hard to do once the hub has been glued! Oops! Jon --

Re: [Emc-users] Encoders

On Dec 13, 2011, at 1:09 PM, Jon Elson wrote: > If you can send me a picture form Halscope, I can compare it to what I > get. See: http://bgp.nu/~tom/pub/XPosErr-VelCmd.png These are versions without the velocity command at 250ipm and ~1500ipm: http://bgp.nu/~tom/pub/XPosError-250ipm.png http

Re: [Emc-users] Encoders

On 13 December 2011 18:44, Tom Easterday wrote: > Thanks Peter.  And how/where does one set this as the velocity profile? It isn't currently an option with EMC2. Though I think at least some work has been done around adding it. -- atp The idea that there is no such thing as objective truth is,

Re: [Emc-users] Encoders

On Tue, 13 Dec 2011, Tom Easterday wrote: > Date: Tue, 13 Dec 2011 13:44:01 -0500 > From: Tom Easterday > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Encoders > > > On D

Re: [Emc-users] Encoders

On Dec 13, 2011, at 1:17 PM, Peter C. Wallace wrote: > A cubic profile > > Currently EMC uses a trapezoidal (linear) velocity profile (so parabolic > position profile) This means the acceleration profile is a step function. The > beginning of this step is whats hard to tune around (as you have

Re: [Emc-users] Encoders

On Tue, 13 Dec 2011, Tom Easterday wrote: > Date: Tue, 13 Dec 2011 13:20:28 -0500 > From: Tom Easterday > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Encoders > Theres a

Re: [Emc-users] Encoders

On Tue, 13 Dec 2011, Tom Easterday wrote: > Date: Tue, 13 Dec 2011 13:06:31 -0500 > From: Tom Easterday > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Encoders > > On Dec 1

Re: [Emc-users] Encoders

On Dec 13, 2011, at 1:09 PM, Jon Elson wrote: > If you can send me a picture form Halscope, I can compare it to what I > get. Are you using FF2? > This can be quite helpful in fixing errors on acceleration. You have to > use it in VERY small > amounts, though, like .005 or even less. It is ea

Re: [Emc-users] Encoders

On Dec 13, 2011, at 1:02 PM, Jon Elson wrote: > The more massive the load, the better, I guess. The worst case is a > low-inertia motor sitting on the bench. Yes, this is an important point - that we have learned the hard way. We were about to throw in the towel trying to tune our machine.

Re: [Emc-users] Encoders

Tom Easterday wrote: > Thanks for the info Jon. We are seeing a small (about 0.001) position error > just on initial acceleration and deceleration that we cannot account for. It > may be due to the encoder. Since this is mainly a plasma machine we will > probably live with it. If we need to

Re: [Emc-users] Encoders

On Dec 13, 2011, at 12:52 PM, Peter C. Wallace wrote: > On Tue, 13 Dec 2011, Tom Easterday wrote: > >> Date: Tue, 13 Dec 2011 11:45:41 -0500 >> From: Tom Easterday >> Reply-To: "Enhanced Machine Controller (EMC)" >> >> To: "Enhanced Ma

Re: [Emc-users] Encoders

Viesturs Lācis wrote: > 2011/12/13 Jon Elson : > >> Watch out for the CUI AMT-10x encoders at Digi-Key, they have a lag >> responding to acceleration, and >> may not be well-suited to CNC systems such as EMC2. >> > > Thanks for the warning, Jon! > I happen to have bought these encoders for

Re: [Emc-users] Encoders

On Tue, 13 Dec 2011, Tom Easterday wrote: > Date: Tue, 13 Dec 2011 11:45:41 -0500 > From: Tom Easterday > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Encoders > > Tha

Re: [Emc-users] Encoders

Thanks for the info Jon. We are seeing a small (about 0.001) position error just on initial acceleration and deceleration that we cannot account for. It may be due to the encoder. Since this is mainly a plasma machine we will probably live with it. If we need to do better we'll look at repla

Re: [Emc-users] Encoders

2011/12/13 Jon Elson : > > Watch out for the CUI AMT-10x encoders at Digi-Key, they have a lag > responding to acceleration, and > may not be well-suited to CNC systems such as EMC2. Thanks for the warning, Jon! I happen to have bought these encoders for one of the machines... Do I understand cor

Re: [Emc-users] Encoders

Tom Easterday wrote: > On Dec 12, 2011, at 9:38 PM, Jon Elson wrote: > >> Watch out for the CUI AMT-10x encoders at Digi-Key, they have a lag >> responding to acceleration, and >> may not be well-suited to CNC systems such as EMC2. >> > > Jon, > We are using these encoders on a gantry mach

Re: [Emc-users] Encoders

On Dec 12, 2011, at 9:38 PM, Jon Elson wrote: > Watch out for the CUI AMT-10x encoders at Digi-Key, they have a lag > responding to acceleration, and > may not be well-suited to CNC systems such as EMC2. Jon, We are using these encoders on a gantry machine and are currently trying to debug a sm

Re: [Emc-users] Encoders

Robert Pabon wrote: > Where do you guys buy yours? Looking for affordable, quality units. Need .25" > hollow shaft quadrature encoder, 2000ppr with L-D output. Anyone know a good > source Avago, US Digital and Renco come to mind. By hollow-shaft, do you mean "kit" encoders? Real hollow-shaft en

[Emc-users] Encoders

Where do you guys buy yours? Looking for affordable, quality units. Need .25" hollow shaft quadrature encoder, 2000ppr with L-D output. Anyone know a good source? Rob -- Systems Optimization Self Assessment Improve effic

Re: [Emc-users] Encoders on 7i48

On 9/17/2011 6:39 AM, Viesturs Lācis wrote: > BTW, I have set servo drive to work in velocity mode (there is special > application for changing settings in servo drives). So I had to set > the scale, how much RPM should motor do at 10V. Unfortunately I cannot > find any PID related parameters to tu

Re: [Emc-users] Encoders on 7i48

2011/9/17 Peter C. Wallace : >> >> I have 2 questions: >> 1) I have managed to get 2 joints oscillate around zero, (which tells >> me that they need have PID parameters adjusted). There is a problem >> with a third joint, which just runs away. When I try to change >> something for that third joint,

Re: [Emc-users] Encoders on 7i48

On Sat, 17 Sep 2011, Viesturs L?cis wrote: > Date: Sat, 17 Sep 2011 19:02:48 +0300 > From: "[UTF-8] Viesturs L?cis" > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users]

Re: [Emc-users] Encoders on 7i48

2011/9/17 Peter C. Wallace : > > Since you have no feedback until you get your encoders working, I would just > try getting +- 10V out of the 7I48 by setting the output scale to 10, > disconnecting the PWM .value from the PID loop and setting it > manually in volts with setp ) try +10, -10, +5 ,-5

Re: [Emc-users] Encoders on 7i48

On Sat, 17 Sep 2011, Viesturs L?cis wrote: Date: Sat, 17 Sep 2011 13:39:33 +0300 From: "[UTF-8] Viesturs L?cis" Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Encoders on 7i48 Hello, Peter! 2

Re: [Emc-users] Encoders on 7i48

Hello, Peter! 2011. gada 16. septembris 16:23 Peter C. Wallace rakstīja: > > Mode 2 is correct for the 7I48, what bit file are you using? My first email on this thread: > I am using this customized firmware, that was kindly provided by Peter > Wallace: > http://www.cutting.lv/fileadmin/user_upl

Re: [Emc-users] Encoders on 7i48

On Fri, 16 Sep 2011, Peter C. Wallace wrote: Date: Fri, 16 Sep 2011 06:23:37 -0700 (PDT) From: Peter C. Wallace Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Encoders on 7i48 On Fri, 16 Sep 2011,

Re: [Emc-users] Encoders on 7i48

On Fri, 16 Sep 2011, Viesturs L?cis wrote: Date: Fri, 16 Sep 2011 14:37:41 +0300 From: "[UTF-8] Viesturs L?cis" Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Encoders on 7i48 2011. gada 16. s

Re: [Emc-users] Encoders on 7i48

2011. gada 16. septembris 13:53 Viesturs Lācis rakstīja: > 2011/9/16 andy pugh : >> On 16 September 2011 11:26, Viesturs Lācis wrote: >> >>> From manual: >>> The 7I48 takes up/down PWM or PDM signals from the Anything I/O card >>> >>> From http://www.linuxcnc.org/docs/devel/html/man/man9/hostmot2

Re: [Emc-users] Encoders on 7i48

On 16 September 2011 09:03, Viesturs Lācis wrote: > I have Mesa 7i48 card, attached to 7i43. The 7i48 requires Muxed Encoders (support introduced in this commit http://git.linuxcnc.org/gitweb?p=emc2.git;a=commit;h=da0d5aa5563de8dc7f8f3a87044bd62e1ade5326 I have never figured out how to tell wha

[Emc-users] Encoders on 7i48

Hello, gentlemen! I would like to ask, if someone can suggest me, why I do not see encoders in HAL Config. I have pasted a screenshot here: http://www.cutting.lv/fileadmin/user_upload/emc2.png I have Mesa 7i48 card, attached to 7i43. The config line tells hm2 driver to load 6 pwm gens, 6 encoders

Re: [Emc-users] Encoders for MPG

I have changed over to making my own MPG's using the cheap ($24) AMT102 settable encoders. I make the shaft and wheel myself and fit a couple of BCD rotary switches in a neat little box. I tend to keep them simple. Currently I am making a substantial unit with two handwheels mounted in an alumini

Re: [Emc-users] Encoders with no Index

On 17 February 2011 19:19, Jon Elson wrote: > Probably the only way to > do it would be to rigid tap with the plug tap, change to the finish tap > but leave the holder loose and manually > start it into the hole, and let the existing threads synch the tap. > Then, tighten the tap holder while it

Re: [Emc-users] Encoders with no Index

Igor Chudov wrote: > Stuart, what I mean is this: > > 1) Drill a hole for tapping > 2) Tap with a plug tap > > Is that possible with a CNC mill equipped for rigid tapping? (like mine)? > It depends on the hole size, the thread engagement, the material, the thickness of the material, etc. I am s

Re: [Emc-users] Encoders with no Index

Igor Chudov wrote: >> > Which brings up a question, can one tap with a plug tap first, on a CNC mill > that is equipped for rigid tapping? > The problem is how do you synchronize two taps, in different holders, so that the threads are synched? I really don't think rigid tapping with a roug

Re: [Emc-users] Encoders x 2

Kim, On Wed, 2011-02-16 at 17:03 -0600, Kim Kirwan wrote: > Yes, this can be done and Stuart (for one) has done it. > > See the wiki "Combining Two Feedback Devices On One Axis" > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Combining_Two_Feedback_Devices_On_One_Axis > Certainly that looks lik

Re: [Emc-users] Encoders with no Index

On Wed, 16 Feb 2011 23:05:21 +0200, you wrote: >On 16 February 2011 19:28, Igor Chudov wrote: > >> Which brings up a question, can one tap with a plug tap first, on a CNC mill >> that is equipped for rigid tapping? > >Probably, but one flute of one thread cuts the whole thread. With a >taper tap

Re: [Emc-users] Encoders x 2

Yes, this can be done and Stuart (for one) has done it. See the wiki "Combining Two Feedback Devices On One Axis" http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Combining_Two_Feedback_Devices_On_One_Axis Thanks, Kim On 02/16/2011 03:21 PM, Marshland Engineering wrote: > I'm not sure if this can

[Emc-users] Encoders x 2

I'm not sure if this can be done but I do have it on my existing mill. It has servo drives with encoders but it also has encoders on the table. This obviously gets rid of backlash. (I have to say it is very accurate mill) Has anyone done something like this ? Thanks Wallace -

Re: [Emc-users] Encoders with no Index

On 16 February 2011 19:28, Igor Chudov wrote: > Which brings up a question, can one tap with a plug tap first, on a CNC mill > that is equipped for rigid tapping? Probably, but one flute of one thread cuts the whole thread. With a taper tap the work is shared over several teeth and flutes. Mach

Re: [Emc-users] Encoders with no Index

> Wow did we misunderstand. > yes definitely > > I don't think it would be very successful to use a bottoming/plug tap > as the first and only tap (whether on a mill or by hand) - if you try > it, let us know! > depends on the material and tap depth and percentage of thread (tap drill diameter)

Re: [Emc-users] Encoders with no Index

On Wed, Feb 16, 2011 at 02:21:40PM -0600, Igor Chudov wrote: > Guys, my question was not about re-entering tapped holes. It is about > tapping a hole with a plug tap as one, first and only tapping operation, in > a CNC mill equipped for tapping. Would that work, mechanically? Wow did we misunders

Re: [Emc-users] Encoders with no Index

On Wed, Feb 16, 2011 at 2:12 PM, Chris Radek wrote: > On Wed, Feb 16, 2011 at 02:04:45PM -0600, Stuart Stevenson wrote: > > > that would be tricky - maybe an optical comparator to make sure the helix > > is in the proper orientation. > > interesting > > Stuart > > > Yes - it would work fine - "al

Re: [Emc-users] Encoders with no Index

On Wed, Feb 16, 2011 at 02:04:45PM -0600, Stuart Stevenson wrote: > that would be tricky - maybe an optical comparator to make sure the helix > is in the proper orientation. > interesting > Stuart Yes - it would work fine - "all" you have to do is get the two taps in the holders oriented the sam

Re: [Emc-users] Encoders with no Index

On Wed, Feb 16, 2011 at 2:04 PM, Stuart Stevenson wrote: > On Wed, Feb 16, 2011 at 11:28 AM, Igor Chudov wrote: > > > > > > > Rigid tapping will always need two pins to sense direction, but unless > > > people do multi-pass tapping (and I guess they might, with taper, > > > second and plug (yike

Re: [Emc-users] Encoders with no Index

On Wed, Feb 16, 2011 at 11:28 AM, Igor Chudov wrote: > > > > Rigid tapping will always need two pins to sense direction, but unless > > people do multi-pass tapping (and I guess they might, with taper, > > second and plug (yikes!)) the index serves only to start the cycle so > > should be perfect

Re: [Emc-users] Encoders with no Index

Someone reading on a parport near/above to max speed could miss a pulse and not know. Shouldnt be doing that but Even with a pulse over speed just gives you a drunk thread no error condition. I cant think how one would set the offsets for a set of plug/middle/taper taps as they wont be consist

Re: [Emc-users] Encoders with no Index

On Wed, 16 Feb 2011, andy pugh wrote: > Date: Wed, 16 Feb 2011 19:21:01 +0200 > From: andy pugh > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: [Emc-users] Encoders with no Index > > Is th

Re: [Emc-users] Encoders with no Index

> > Rigid tapping will always need two pins to sense direction, but unless > people do multi-pass tapping (and I guess they might, with taper, > second and plug (yikes!)) the index serves only to start the cycle so > should be perfectly safe to derive synthetically. > > Which brings up a question,

[Emc-users] Encoders with no Index

Is there any reason why it would be a bad idea to derive an index pulse in software? I am thinking about situations where folk are short of P-port pins but want to tap/thread etc. You can do lathe threading with one pulse per rev and a single pin, but I can't help feeling that multiple pulses and a

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