Re: [Emc-users] Step Direction for use on Servo Amps
Of course you can. I have a machine set-up running like this now. But as some others have already said, the speed of software step generation will be your limiting factor. If I had to do it over I would have taken a different route with my set-up, and used hardware step generation (probably with a Mesa 5i25 and one of its daughter cards). You can increase your speed with the drives internal gearing at the expense of resolution. I had to do this to get acceptable speed, taking an 8000count/rev system down to 500. This large step in turn made tuning the drives a little more difficult. - Original Message - Can the stepper motor 'step direction' output from EMC2 be used to run a servo based system that has step direction input amplifiers where the servo motor encoder feed back goes into the amp and not EMC2? I believe the Yaskawa Sigma II amps can run in this mode. My thought was to build a simpler system and avoid the additional motion control boards if the Yaskawa amps could connect directly to an isolator/break-out board from the parallel port. Or are these two completely different systems with only the step direction words in common? Thanks for your help Steve Van Der Loo Tube Gauge Inspection Fixtures Inc 420 Neptune Crescent London, ON N6M 1A1 -- Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Todd Zuercher mailto:zuerc...@embarqmail.com -- Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Step Direction for use on Servo Amps
Can the stepper motor 'step direction' output from EMC2 be used to run a servo based system that has step direction input amplifiers where the servo motor encoder feed back goes into the amp and not EMC2? I believe the Yaskawa Sigma II amps can run in this mode. My thought was to build a simpler system and avoid the additional motion control boards if the Yaskawa amps could connect directly to an isolator/break-out board from the parallel port. Or are these two completely different systems with only the step direction words in common? Thanks for your help Steve Van Der Loo Tube Gauge Inspection Fixtures Inc 420 Neptune Crescent London, ON N6M 1A1 -- Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Step Direction for use on Servo Amps
On 8 October 2012 17:44, Steve from Tube Gauge st...@tgifinc.com wrote: Can the stepper motor 'step direction' output from EMC2 be used to run a servo based system that has step direction input amplifiers Yes, absolutely. In fact there are at least two ways to do it. You can run open-loop, sending position information as step and direction signals just as if the servos were stepper motors, or you can run the stepgens in velocity mode, and have a PID controller Inside LinuxCNC controlling the position with the servo amps acting effectively like velocity-mode drives driven by step-rate rather than analogue voltage. The latter system requires that the encoder feedback goes to both the drives and the PC. You will probably run out of pins if using a parallel port. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
