tuning of driver Vref 

A very important step to properly set up our 3d printer is tuning of driver’s Vref of the motor’s step by step. Very often a hasty calibration of these drivers leads to lose some steps or even to their break due to overheating…

tuning of driver Vref

I have used both the most current DRV8825 and the A4988 StepStick, both on different printers with different cards. The main difference between the two drivers concerns the capacity of current supplied and the number of managed steps: 2A and 16 microstep for the A4988, 2.5A and 32 microstep for the DRV8825. Obviously the cost varies and the A4988 are naturally cheaper.

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