Re: [Emc-users] steppers with encoders in closed loop

- Original Message - > From: "Valerio Bellizzomi" <vale...@selnet.org> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Sent: Tuesday, June 27, 2017 3:58:34 AM > Subject: Re: [Emc-users] steppers with encoders in

Re: [Emc-users] steppers with encoders in closed loop

t; loops. > > > > - Original Message - > > From: "Tom Easterday" <tom-...@bgp.nu> > > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > > Sent: Monday, June 26, 2017 8:37:47 AM > > Subject: Re: [Emc-users] stepp

Re: [Emc-users] steppers with encoders in closed loop

Latest plot (on X axis): http://bgp.nu/~tom/pub/pid-X-ff2.png -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot

Re: [Emc-users] steppers with encoders in closed loop

Thanks Peter, It did help a small bit. Max f-error is now .00014 to .00015 (vs .00018 to .00019). That is a sensitive parameter. I played with FF2 = .001 (bad), .0006 (bad), .00055 ok but ferror was .00016-.00017, so I left it at .0005. -Tom > On Jun 26, 2017, at 7:35 PM, Peter C. Wallace

Re: [Emc-users] steppers with encoders in closed loop

On Mon, 26 Jun 2017, tom-...@bgp.nu wrote: Date: Mon, 26 Jun 2017 19:20:14 -0400 From: tom-...@bgp.nu Reply-To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> S

Re: [Emc-users] steppers with encoders in closed loop

And for those following along at home, I got the machine set up in velocity mode and the pid tuned fairly well. The following error is less than .0002 and the machine runs very nicely, and I can now Home to the index pulse on the encoder (which is where this all began)! Yay. Below are links

Re: [Emc-users] steppers with encoders in closed loop

"Tom Easterday" <tom-...@bgp.nu> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Sent: Monday, June 26, 2017 8:37:47 AM > Subject: Re: [Emc-users] steppers with encoders in closed loop > > Exactly, and any help in

Re: [Emc-users] steppers with encoders in closed loop

he encoder feedback. Then connect the encoders to the PID loops. - Original Message - From: "Tom Easterday" <tom-...@bgp.nu> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Monday, June 26, 2017 8:37:47 AM Subject: Re: [Emc-us

Re: [Emc-users] steppers with encoders in closed loop

Exactly, and any help in getting my stall detection and position tracking working using velocity mode would be greatly appreciated  -Tom > On Jun 26, 2017, at 6:52 AM, Rene Hopf wrote: > > there is no benefit in using them in linuxcnc, apart from stall detection or >

Re: [Emc-users] steppers with encoders in closed loop

> On 26. Jun 2017, at 00:12, tom-...@bgp.nu wrote: > > I would like to attempt to get my machine with stepper motors running in > velocity mode with feedback from the encoders. this setup makes absolutely no sense. if the drive does not use the encoder, there is no benefit in using them in

Re: [Emc-users] steppers with encoders in closed loop

On Sunday 25 June 2017 22:13:04 Tom Easterday wrote: > Gene, > Thanks for the response. The machine has been running great for years > on those values but in position mode, not in velocity mode. I > wouldn't think that any of the step-gen parameters would need to > change when changing to

Re: [Emc-users] steppers with encoders in closed loop

Gene, Thanks for the response. The machine has been running great for years on those values but in position mode, not in velocity mode. I wouldn't think that any of the step-gen parameters would need to change when changing to velocity mode...? I suspect the PID parameters I am using,

Re: [Emc-users] steppers with encoders in closed loop

On Sunday 25 June 2017 18:12:14 tom-...@bgp.nu wrote: > I would like to attempt to get my machine with stepper motors running > in velocity mode with feedback from the encoders. Below are the > relevant parts of my Hal and Ini files for just the X-Axis. I figured > I would do one axis at a

[Emc-users] steppers with encoders in closed loop

I would like to attempt to get my machine with stepper motors running in velocity mode with feedback from the encoders. Below are the relevant parts of my Hal and Ini files for just the X-Axis. I figured I would do one axis at a time. Currently nothing happens when I try to jog the X axis