1Drive current algorithm: i = vref* 9/5, default Verf is about 0.65V, So the default current is 0.5A and the maximum current is 1A. 2Verf measure Gnd and the voltage at the middle of the potentiometer. 3The usage of driver module: When using on Ramps4 or MKS Gen, or Loco touch screen board, please remove the 3 jumper caps under the socket. pay attention to the direction, heatsink can stick on the surface of PCB. 4The motor direction is opposite to A4988 and DRV8825, adjust the firmware or motor wire sequence if want to change 4988. If you use the lego board, please set the motor direction directly on the touch screen. Set the direction from inside. 5Usage of driver module used on the lego board: Remove the 3 jumper caps under the jack, module has no subdivision settings, the value is calculated according to 16 subdivision. Using the difference algorithm to extend 16 subdivision to 256 subdivisio