Ok well the machine is not new, but rather an old Bridgeport Boss 5 CNC. I had this machine running with steppers and Mach 3 years ago. Then I decided to upgrade it, long story that you are not interested in. Got side tracked by life and a couple of years went by and now I'm starting over, so it's a new conversion and nearly everything has changed except the old iron. I'm using Mach 4 demo, CNC4PC C82 break out board, Ethernet smooth stepper, ClearPath Integrated Servo Motors (CPM-SDSK-3421S-RLS). I got 3 axises jogging, but it's acting a bit weird. Sometimes I command it to jog and it does not move even though the DRO indicates a move. Most of the time it does jog, but sometimes it seems my jog command doesn't move the axis. This happens on all 3 axises. Any ideas? I'm not even sure where to start looking, is this a Mach issue, Clearpath issue? My feeling it's a setting or configuration I need to make in Mach for the clearpath motors. Any suggestions? Thanks!!