Tom, EMC2 can indeed use an index pulse for homing after tripping a switch or sensor. It is the most accurate method. I'm just curious, if you have servomotors why not use them with matching servo amps? Closing your position loop back to EMC2 is also the most accurate, and you will love your D510MO again! Jim
----- Original Message ----- From: Tom Easterday <tom-...@bgp.nu> To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> Sent: Wed Sep 07 15:00:40 2011 Subject: [Emc-users] example configs for running servo/encoder machine as velocity mode stepgen with pid loop I am trying to configure a gantry machine (X,Y,Y,Z) which is built with Gecko 320X drivers connected to servo motors. I originally had a parallel breakout board driving the Geckos (doing step generation in EMC) but was getting random high latency on the D510MO motherboard and strange behavior of the servos (perhaps attributable to step generation issues). I also wanted to use the index pulse for homing, and the 320Xs don't use the index pulse at all, and I was told by several people that EMC can't do homing with it either. So I was thinking about using Mesa 7i43 cards to remove the step latency problems and Peter Wallace suggested I could try a variation of a config that some people have used with success, that is, running the encoder signals back to the 7I43 and run the step generator in velocity mode (with PID loop), approximating a velocity mode servo. I am wondering if there are any example configurations out there for this setup? Tom ------------------------------------------------------------------------------ Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users This communication is for the use of the intended recipient only. It may contain information that is privileged and confidential. If you are not the intended recipient of this communication, the disclosure, copying, distribution or use hereof is prohibited. If you have received this communication in error, please advise me by return e-mail or by telephone and then delete it immediately.
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