Re: [Emc-users] Serial Encoders

On Mon, 2008-03-10 at 22:28 -0400, Stephen Wille Padnos wrote: > Since you're convinced you want a quadrature encoder now, here's a link: :) > > > > I've used these before, and they're good, robust controls. They have

Re: [Emc-users] Spindle Index

On Mon, 2008-03-10 at 22:38 -0400, Stephen Wille Padnos wrote: > Kirk Wallace wrote: > > >On Sun, 2008-03-09 at 16:29 -0700, Curtis W. Moore wrote: > > > > > >>If I added pulses can it be done? My encoder is just a homebuilt opto > >>switch. Cutting out a new wheel with more slots/holes would be

Re: [Emc-users] pwm-0-gen problems

> I haven't even gotten that far, this is trying to use axis to enable it > and 'spin' it by issueing the pwm and dir sigs. I don't have the outputs of > Steve's card even connected to the spindle controller card yet, I'm at the > point of trying to get the card to actually recognize that it

Re: [Emc-users] Spindle Index

Kirk Wallace wrote: >On Sun, 2008-03-09 at 16:29 -0700, Curtis W. Moore wrote: > > >>If I added pulses can it be done? My encoder is just a homebuilt opto >>switch. Cutting out a new wheel with more slots/holes would be trivial. >>Can EMC thread with just one train of pulses? Ie use just one pin

Re: [Emc-users] Serial Encoders

Since you're convinced you want a quadrature encoder now, here's a link: :) I've used these before, and they're good, robust controls. They have detents (pretty good clicky ones), and the switch is also a pushbutton

Re: [Emc-users] Stepper speed

[EMAIL PROTECTED] wrote: > Been reading through some old stuff recently and found the graphic I put in > pastebin at http://imagebin.ca/view/clpgA5sW.html. It was in the graduate > theses that Sagar wrote on his EMC propelled SCARA robot. IMO the zero > torque portion of the speed/torque curve

Re: [Emc-users] pwm-0-gen problems

On Monday 10 March 2008, Kirk Wallace wrote: >On Mon, 2008-03-10 at 20:15 -0400, John Kasunich wrote: >> Gene Heskett wrote: >> > Greetings all; >> > >> > I'm in the process of hooking up one of Steve Stallings #106 spindle > >... snip > >> > So, what do I check next folks? >> >> Divide and conquer

Re: [Emc-users] pwm-0-gen problems

On Mon, 2008-03-10 at 20:15 -0400, John Kasunich wrote: > Gene Heskett wrote: > > Greetings all; > > > > I'm in the process of hooking up one of Steve Stallings #106 spindle ... snip > > So, what do I check next folks? > > > > Divide and conquer. Pwmgen is known to work, so thats not likely to

Re: [Emc-users] pwm-0-gen problems

Gene Heskett wrote: > Greetings all; > > I'm in the process of hooking up one of Steve Stallings #106 spindle > controllers, and have run into either a config problem, a buglet or a > hardware problem. > > I thought it might be a bios vs parport thing, and when I checked, I found > the > bios

[Emc-users] pwm-0-gen problems

Greetings all; I'm in the process of hooking up one of Steve Stallings #106 spindle controllers, and have run into either a config problem, a buglet or a hardware problem. I thought it might be a bios vs parport thing, and when I checked, I found the bios was setting it for SPP, so I changed i

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, [EMAIL PROTECTED] wrote: >Been reading through some old stuff recently and found the graphic I put in > pastebin at http://imagebin.ca/view/clpgA5sW.html. It was in the graduate > theses that Sagar wrote on his EMC propelled SCARA robot. IMO the zero > torque portion of th

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, Kirk Wallace wrote: >On Mon, 2008-03-10 at 12:27 -0400, Gene Heskett wrote: >...snip > >> You can see mine at along with the >> rest of the old farts messy machineing corner in my wood working shop. >> That *was* an HF MicroMill at o

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, Kirk Wallace wrote: >On Mon, 2008-03-10 at 12:55 -0400, Gene Heskett wrote: >> On Monday 10 March 2008, Kirk Wallace wrote: > >...snip > >> No, it can serve to absorb it, quite well from my experiences so far. >> Common sense says the weight of the damper will lower that f

Re: [Emc-users] Decompiling PLC file

No problem Dale. BTW, what is being controlled by the PLC now? John On 10 Mar 2008 at 6:02, [EMAIL PROTECTED] wrote: > John, > I will make the list in the next 2 or 3 weeks. By then I will finish > reading HAL/Classic Ladder and then start the PLC program. If I have > problems can I get

[Emc-users] Small CNC Build

Aram, (or anyone interested) I got to thinking about your CNC project. One way to save money and get help, might be to get a group of people together that want the same type of machine. Each member could contribute their skill or money to the cause. Each person contributes, each person gets a mach

Re: [Emc-users] Radius to start differs from radius to end

At 01:01 PM 3/10/2008, you wrote: >Gentlemen, > Does Synergy's post allow you to specify the end point of the arc >to be exactly on the circle? The distance between the starting point >and the center of the radius AND the distance between the ending point >and the center of the radius must matc

Re: [Emc-users] Stepper speed

On Mon, 2008-03-10 at 12:27 -0400, Gene Heskett wrote: ...snip > You can see mine at along with the > rest of the old farts messy machineing corner in my wood working shop. That > *was* an HF MicroMill at one point in past history, not sure what it should

Re: [Emc-users] Serial Encoders

--- [EMAIL PROTECTED] wrote: From: ben lipkowitz <[EMAIL PROTECTED]> To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Serial Encoders Date: Mon, 10 Mar 2008 17:46:26 + (UTC) ...if you do need an inexpensive absolute encoder, austria microsystems makes an interesting magneti

Re: [Emc-users] Radius to start differs from radius to end

Hi Stuart, I have to play dumb here. I just let Synergy do it's thing. I didn't find anything in the post. If you draw it correctly it seems synergy will do it. I think emc is double precision internally. Plenty of resolution. :-) Someone will correct me if this is incorrect. ;-) Dave On Mar 10

Re: [Emc-users] Stepper speed

On Mon, 2008-03-10 at 12:55 -0400, Gene Heskett wrote: > On Monday 10 March 2008, Kirk Wallace wrote: ...snip > No, it can serve to absorb it, quite well from my experiences so far. Common > sense says the weight of the damper will lower that frequency somewhat also. ... snip Yes, I agree. I mus

Re: [Emc-users] Stepper speed

Been reading through some old stuff recently and found the graphic I put in pastebin at http://imagebin.ca/view/clpgA5sW.html. It was in the graduate theses that Sagar wrote on his EMC propelled SCARA robot. IMO the zero torque portion of the speed/torque curve on the full step graph ought to

Re: [Emc-users] Serial Encoders

On Mon, 10 Mar 2008, John Kasunich wrote: > > Kirk Wallace wrote: >> I am looking into adding a knob for setting spindle speed manually. This >> serial encoder is close to what I am looking for: >> >> http://www.usdigital.com/products/a2/ >> >> but is over-kill and way too expensive. Does anyone h

Re: [Emc-users] Serial Encoders

On Mon, 2008-03-10 at 13:00 -0400, John Kasunich wrote: > Kirk Wallace wrote: > > I am looking into adding a knob for setting spindle speed manually. This > > serial encoder is close to what I am looking for: ... snip > If you use an incremental encoder with no scale, then it can coexist > nicely

Re: [Emc-users] Radius to start differs from radius to end

Gentlemen, Does Synergy's post allow you to specify the end point of the arc to be exactly on the circle? The distance between the starting point and the center of the radius AND the distance between the ending point and the center of the radius must match. I don't know the numeric precisio

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, [EMAIL PROTECTED] wrote: >Gene, > >I may have to investigate adding dampers like you have done. I didn't >consider adding it between the motor and the machine. I had always seen >dampers on the back side of the steppers. > >Jim C > Those aren't dampers on the work end of

Re: [Emc-users] Stepper speed

Gene, I may have to investigate adding dampers like you have done. I didn't consider adding it between the motor and the machine. I had always seen dampers on the back side of the steppers. Jim C - This SF.net email is s

Re: [Emc-users] Serial Encoders

Kirk Wallace wrote: > I am looking into adding a knob for setting spindle speed manually. This > serial encoder is close to what I am looking for: > > http://www.usdigital.com/products/a2/ > > but is over-kill and way too expensive. Does anyone have a link to an 8 > or 10 bit serial (SPI like) ab

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, Kirk Wallace wrote: >On Mon, 2008-03-10 at 10:49 -0400, [EMAIL PROTECTED] wrote: >> Please, I did not in any way mean to be unfair to EMC. I did not mean it >> in that way at all. >> >> EMC is a fantastic program. >> >> What I mean is that by doing the electronic gearing

Re: [Emc-users] fanuc

Hi Patrice, You can use the link below to get to the page index for the emc wiki. Peruse the Mazak entries for an idea of how a conversion goes (went). ;-) http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?action=index HTH Dave On Mar 10, 2008, at 10:39 AM, Jon Elson wrote: > patrice.vallade Valla

[Emc-users] Serial Encoders

I am looking into adding a knob for setting spindle speed manually. This serial encoder is close to what I am looking for: http://www.usdigital.com/products/a2/ but is over-kill and way too expensive. Does anyone have a link to an 8 or 10 bit serial (SPI like) absolute encoder? I checked Digikey

Re: [Emc-users] Stepper speed

Kirk Wallace wrote: > > I think you stated the crux of the problem with "there is no way to > avoid a condition where a stepper motor is operating at a step rate > where resonance is present." > > The mechanical damping can move where resonance happens. I also noticed > from other threads, that

Re: [Emc-users] Radius to start differs from radius to end...

Hi Kirk, I have two EMC posts on my machine. The standard one labeled EMC and one that uses R rather than I,J for circular interp. D On Mar 10, 2008, at 9:30 AM, Kirk Wallace wrote: > So far, I have used Synergy to draw the part, then draw the tool paths > and use the path way points to write

Re: [Emc-users] fanuc

patrice.vallade Vallade wrote: > Is il possible to use emc2 whit a Fanuc, but i dont now what sort of > fanuc it is. Fanuc makes machine controls, not machine tools. EMC is usually used to REPLACE a dead machine tool control unit. We replaced the Fanuc control on a Mazak VMC-5 at Roland Freistad

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, [EMAIL PROTECTED] wrote: >Please, I did not in any way mean to be unfair to EMC. I did not mean it >in that way at all. > >EMC is a fantastic program. > >What I mean is that by doing the electronic gearing there is no way to >avoid a condition where a stepper motor is ope

Re: [Emc-users] Radius to start differs from radius to end...

So far, I have used Synergy to draw the part, then draw the tool paths and use the path way points to write G-code. That method may not be usable for complex parts, but I suppose it lets you use tool compensation. I have only written a few programs, so writing programs by hand is probably good, but

Re: [Emc-users] Stepper speed

On Mon, 2008-03-10 at 10:49 -0400, [EMAIL PROTECTED] wrote: > Please, I did not in any way mean to be unfair to EMC. I did not mean it > in that way at all. > > EMC is a fantastic program. > > What I mean is that by doing the electronic gearing there is no way to > avoid a condition where a ste

Re: [Emc-users] Radius to start differs from radius to end...

Hi Ben, Remember, Synergy does things differently. It writes code that is offset by cutter radius and also uses G41/G42. This means the tool table diameters need to be zero. Small deviations are then entered into the tool table to compensate for sharpening or small adjustments in dimensioning.

Re: [Emc-users] Radius to start differs from radius to end...

Ben Dugan wrote: > I'm pretty sure I've seen this asked before, but I couldn't find it in > the archives for this mail list. > > I'm running EMC2. I get this error on lines with G2 or G3 in them. (The > code is output from Synergy). If I get this error, is there still a > setting (like INCH_TOLERA

[Emc-users] Radius to start differs from radius to end...

I'm pretty sure I've seen this asked before, but I couldn't find it in the archives for this mail list. I'm running EMC2. I get this error on lines with G2 or G3 in them. (The code is output from Synergy). If I get this error, is there still a setting (like INCH_TOLERANCE) that will relax the con

Re: [Emc-users] Stepper speed

Please, I did not in any way mean to be unfair to EMC. I did not mean it in that way at all. EMC is a fantastic program. What I mean is that by doing the electronic gearing there is no way to avoid a condition where a stepper motor is operating at a step rate where resonance is present. It wil

[Emc-users] fanuc

Is il possible to use emc2 whit a Fanuc, but i dont now what sort of fanuc it is. Thanks. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse01200

Re: [Emc-users] Stepper speed

On Monday 10 March 2008, [EMAIL PROTECTED] wrote: >Kirk, > >Yes, I have used the dampers and they work well. My motors at home don't >have the dual shafts. I made due with some old motors. Things are working >well for me right now without them. I could run faster if I had them on >the motors. >

Re: [Emc-users] Stepper speed

Kirk, Yes, I have used the dampers and they work well. My motors at home don't have the dual shafts. I made due with some old motors. Things are working well for me right now without them. I could run faster if I had them on the motors. Here are work, I have seen the results and it's not pret