Hi,
I'm configuring my machine with Mach3. I have the following specification:
HDBB2 parallel port BOB (no motion controller)
DG4S-08020 cncdrive servo amps
75vdc 20a SEM MT30 servo motors
I have all 3 axis configured and the steps set accordingly, with accurate results! However I'm having an issue with my Y axis. The axis moves to position as it should when commanded. However upon stopping it just jitters or oscillates rapidly and sounds like buzzing bee until the next move is commanded. Sometimes it will stop after 5 - 10 seconds. If I pull lightly on one side of the drive belt from the motor I can get it to stop.
All three servo amps are configured identically (see below)
http://www.cnczone.com/forums/attach...d=348664&stc=1
When the drive is oscillating, if I check the drive / amp diagnostics it seems as if the servo is fluctuating by +0.001852 and -0.001852 around the commanded position (see below)
http://www.cnczone.com/forums/attach...d=348666&stc=1
If I can just get this ironed out I'll be over the moon, as other than this the machine is absolutely spot on! I'm afraid if I leave it, damage will occur to either the servo or the drive.
Many thanks in advance.
Jim