Re: [Emc-users] Axis Direction Change with Servo System - How?
Thanks Chris, that did the trick. Regards Steve Corboy Message: 6 Date: Mon, 28 Dec 2009 20:26:05 -0600 From: Chris Radek ch...@timeguy.com Subject: Re: [Emc-users] Axis Direction Change with Servo System - How? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 20091229022604.gp1...@timeguy.com Content-Type: text/plain; charset=us-ascii On Tue, Dec 29, 2009 at 12:50:15PM +1030, Steve Corboy wrote: I understand how to do this with a stepper system - by changing the sign of the input scale in the .ini file. However, when I do this with a servo system, the axis happily charges off in one direction when powered on because now (presumably) the sign of the feedback no longer corresponds to the sign of the table motion. ie encoder counts are opposite sign to table motion. Change the signs of both INPUT_SCALE and OUTPUT_SCALE. -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Direction Change with Servo System - How?
If it's a DC servo then you can simply change the polarity while also swapping the pinout in the encoder accordingly. I did swap the polarity once only and then looked for a couple of days for the problem that the drive disabled with the first step... Of course... the encoder has to be adapted as well. Rainer On Tue, Dec 29, 2009 at 7:35 PM, Steve Corboy stevecor...@gmail.com wrote: Thanks Chris, that did the trick. Regards Steve Corboy Message: 6 Date: Mon, 28 Dec 2009 20:26:05 -0600 From: Chris Radek ch...@timeguy.com Subject: Re: [Emc-users] Axis Direction Change with Servo System - How? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 20091229022604.gp1...@timeguy.com Content-Type: text/plain; charset=us-ascii On Tue, Dec 29, 2009 at 12:50:15PM +1030, Steve Corboy wrote: I understand how to do this with a stepper system - by changing the sign of the input scale in the .ini file. However, when I do this with a servo system, the axis happily charges off in one direction when powered on because now (presumably) the sign of the feedback no longer corresponds to the sign of the table motion. ie encoder counts are opposite sign to table motion. Change the signs of both INPUT_SCALE and OUTPUT_SCALE. -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- _ Rainer M. Schmidt Complex Consulting LLC b...@complexllc.com Voice (646)-657-8815 FAX (646)-435-9216 -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Axis Direction Change with Servo System - How?
In the dying stages of retrofitting EMC2 to an OKK mill with servo motors. Everything is happy, the PID loops all behave the way they should. However, one of the axes needs it's direction reversed. I understand how to do this with a stepper system - by changing the sign of the input scale in the .ini file. However, when I do this with a servo system, the axis happily charges off in one direction when powered on because now (presumably) the sign of the feedback no longer corresponds to the sign of the table motion. ie encoder counts are opposite sign to table motion. What's the easiest way around this? I know if I tinker I'll get it eventually but it's a pretty big lump of metal and my enthusiasm for seeing unexpected movements on power-on is diminishing somewhat :-) Thanks very much Steve Corboy -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Direction Change with Servo System - How?
On Tue, Dec 29, 2009 at 12:50:15PM +1030, Steve Corboy wrote: I understand how to do this with a stepper system - by changing the sign of the input scale in the .ini file. However, when I do this with a servo system, the axis happily charges off in one direction when powered on because now (presumably) the sign of the feedback no longer corresponds to the sign of the table motion. ie encoder counts are opposite sign to table motion. Change the signs of both INPUT_SCALE and OUTPUT_SCALE. -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
