Hello,

We have been running a Multicam 5'x10' table retrofitted to mach 3 for quite sometime.  We are having an inconsistent issue where on multiple depths/pass jobs we sometimes have passes that don't line up by a few hundreths of an inch.  I'm having a hard time telling if it is because the material is shifting or if the machine is losing steps.  We are using an ethernet smooth stepper board with cnc4 pc C32 boards.  The machine has pacific scientific stepper 6410 stepper cards and some pretty beefy motors.   

Reduce the Velocity and Acceleration by half and see if it still happens, if it does then its likely not losing steps.
Hood

I'm wondering if any of the settings relating to the data rate and buffer need to be adjusted.  They are all set to the mach 3 defaults.

Data rate and buffer?
Hood