... I've built a JGro-type cnc router that's being controlled with a hobby cnc card and their 305oz steppers.
I'm trying to use the emc ubuntu distribution to control it.
i've got motion, but I'm having intermittent problems with movement.
sometimes the steppers will just hum or make a grinding sound instead of moving. if I slow my feed rate down the problem seems to go away.
so what I'm thinking is that I have an acceleration problem when jogging the axises...
is there a easy way I can configure an acceleration ramp so that it doesn't go from 0 to 100ipm immediately, but starts slower and then speeds up? Or is this something I don't want to do?
secondly.. it appears that my direction is reversed from what EMC is showing on the screen in Axis... how do I change the control signals? I tried adding the -invert options in the hal file, but i'm not really sure what hal file emc is reading... so I'm kinda lost on that front too.
Thanks!
-J