Step 2
With power connected and on and the stepper motors connected, locate the Vref Adjustment
Pot and looking at the stepper driver in the following orientation the 2nd pin in from the left
along the top row and measure the current by putting the ground probe on the 2nd pin from
the left on the top row and the positive probe on the adjustment pot, poke the probe into the
pot until you get a reading on your multimeter. Make sure you don’t slip and touch any of the
other pins as this could damage the stepper driver
11.0 Commissioning & Calibration - Reprap Prusa Mendel Build Manual
©2012 NextDayReprap
Prusa Mendel Kit Build Manual V1.01 - 07/2012