Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Nicklas Karlsson
> >> The feedback comes from the rotary encoder that is attached to the back > >> end of the servo shaft. So no backlash there. > > > > I was just thinking that looking at the command and feedback traces > > might reveal any response issues which could be backlash, encoder > > latency, or

Re: [Emc-users] Problem with servo setup --> tune mode

2016-10-25 Thread Nicklas Karlsson
MC)" <emc-users@lists.sourceforge.net> > Sent: Tuesday, October 25, 2016 1:33:21 PM > Subject: Re: [Emc-users] Problem with servo setup --> tune mode > > I have not. Dont know how I did not know about this. I will try it. > > >Did you try the tune mode? >

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Kirk Wallace
On 10/25/2016 01:15 PM, Kirk Wallace wrote: > On 10/25/2016 10:35 AM, Marius Liebenberg wrote: >> The feedback comes from the rotary encoder that is attached to the back >> end of the servo shaft. So no backlash there. > > I was just thinking that looking at the command and feedback traces > might

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Kirk Wallace
On 10/25/2016 10:35 AM, Marius Liebenberg wrote: > The feedback comes from the rotary encoder that is attached to the back > end of the servo shaft. So no backlash there. I was just thinking that looking at the command and feedback traces might reveal any response issues which could be backlash,

Re: [Emc-users] Problem with servo setup --> tune mode

2016-10-25 Thread Todd Zuercher
gmail.com>, "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Tuesday, October 25, 2016 1:33:21 PM Subject: Re: [Emc-users] Problem with servo setup --> tune mode I have not. Dont know how I did not know about this. I will try it. >Did you try the t

Re: [Emc-users] Problem with servo setup --> tune mode

2016-10-25 Thread Marius Liebenberg
cut.co.za>; "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: 2016-10-25 17:58:00 Subject: Re: [Emc-users] Problem with servo setup --> tune mode >Did you try the tune mode? > >It could be found in the hal configuratio and set via "setp&q

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Marius Liebenberg
The feedback comes from the rotary encoder that is attached to the back end of the servo shaft. So no backlash there. -- Original Message -- From: "Kirk Wallace" <kwall...@wallacecompany.com> To: emc-users@lists.sourceforge.net Sent: 2016-10-25 18:46:32 Subject: Re: [Em

Re: [Emc-users] Problem with servo setup --> tune mode

2016-10-25 Thread Marius Liebenberg
I have not. Dont know how I did not know about this. I will try it. >Did you try the tune mode? > >It could be found in the hal configuratio and set via "setp" command. >Manual http://linuxcnc.org/docs/html/man/man9/at_pid.9.html further >down on page "pid.N.tune-" > > > > > >On Tue, 25 Oct

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Kirk Wallace
On 10/24/2016 11:16 PM, Marius Liebenberg wrote: > Hi All > I have a problem with a machine using servos. It is a 4 axis machine > with the 4th axis being rotary. The linear servos are tuned and working > very well but the rotary axis is not behaving well. It has a severe > oscillation and I

Re: [Emc-users] Problem with servo setup --> tune mode

2016-10-25 Thread Nicklas Karlsson
Did you try the tune mode? It could be found in the hal configuratio and set via "setp" command. Manual http://linuxcnc.org/docs/html/man/man9/at_pid.9.html further down on page "pid.N.tune-" On Tue, 25 Oct 2016 06:16:04 + "Marius Liebenberg" wrote: > Hi All >

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Marius Liebenberg
rius Liebenberg" <mar...@mastercut.co.za>; "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: 2016-10-25 14:01:06 Subject: Re: [Emc-users] Problem with servo setup >On 25 October 2016 at 07:16, Marius Liebenberg <mar...@mastercut.co.za> >wr

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread andy pugh
On 25 October 2016 at 07:16, Marius Liebenberg wrote: > The 4th axis used to be a stepper and that worked well but we changed the > stepper for a servo to get more speed through a reduction planetary gearbox. > I attached the HAl and INI files. What is the ratio of the

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Marius Liebenberg
Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: 2016-10-25 12:19:49 Subject: Re: [Emc-users] Problem with servo setup >Hi, >First thing I notice, you dont have any ff term. I guess you have ho >external current or velocity regulator, just a position pid outputt

Re: [Emc-users] Problem with servo setup

2016-10-25 Thread Rene Hopf
Hi, First thing I notice, you dont have any ff term. I guess you have ho external current or velocity regulator, just a position pid outputting voltage via pwm? That is not really the best setup, but still should be possible to tune… Rene > On 25 Oct 2016, at 08:16, Marius Liebenberg

[Emc-users] Problem with servo setup

2016-10-25 Thread Marius Liebenberg
Hi All I have a problem with a machine using servos. It is a 4 axis machine with the 4th axis being rotary. The linear servos are tuned and working very well but the rotary axis is not behaving well. It has a severe oscillation and I cannot seem to get the PID trimmed to stabilize the servo.