Hey Flemgunner, go to your motor tuning tab and turn down speed and acceleration and try that..
Top left side in "config tab" THen down to motor tuning and turn those down on every axis until you get what runs the steppers correct.
Remember to hit ENTER when you change each box then apply then re-start mach and go from there.
Are your motors going in the right amount of steps as well? so a 1 inch move is 1 inch?
Then go to SETTINGS tab in mach and right above the RESET on the lower left is the calibrate axis as well.
Hope this helps..
Also if you are new check out the training videos on the main Mach or Artsoft page they are real helpful with setting up the machine settings
Gary