Hi, Steve Stallings wrote: > There are motor drivers that have internal logic to > automatically reduce the drive current while idle. > These will weakly hold position and run much cooler > when at rest. They can resume full power instantly when > a step pulse arrives. Of course, this is a feature > that the driver either has or doesn't have, no > signal from EMC can produce this result if the > driver does not support it.
right. I realized something like that in my driver (.comp module) by loading a counter every time the stepper is clocked. When the stepper is not clocked in a cycle, i decrement the counter, and when the counter becomes zero, i reduce the current of the electronics. When a new stepper-clock arrives, full power is re-enabled. It works very smooth. This requires of course that you have a (electronic) signal to reduce the current, and that the electronics can increase the current to full power in a fraction of the time of one step. When the current is about one third of the normal current, the stepper holds very well its steady position. Luc ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
