Hi. Due to the way our machine drives the axes, we would like to turn off the amplpifiers when no axis moves (even when the spindle is on), since the steppers get really hot if they don't move but are driven at full current.
However, axis.*.amp-enable-out goes true as soon as the machine is enabled in EMC. Is there any pin for the axes which only gets enabled shortly before the respective axis starts moving and gets disabled again when it stopped moving? Or any other way we could emulate that behaviour with the latest released emc version? In my opinion, the current behaviour could easily be emulated if axis.*.amp-enable-out would go true only under the above condition if a pin iocontrol.emc-machine-on would be added. Alternatively (so as not to break old installs), adding a pin axis.*.enable-movement (possibly under a different name) would surely work just as well. On a different topic: Also, our controller supports a "boost" option. This increases the current on the steppers to gain some torque at high speeds and/or high accelleration. We don't really need it, since our use of the machine doesn't care to much about speed, but support for this would really be nice in the future (we plan on building a new machine from scratch once we got the current one working nicely with EMC), but using boost needs some thinking. For example it can't be used for too long, since it might heat the steppers up too much, so its usage would need to be tracked in the motion planner I think, since it needs to slow down movement/accelleration if the boost had been used too much recently. Regards, Sven ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
