Description: 3D printer MKS TMC2100 stepper motor driver, Simple step and direction control interface. Ultra-silent excellent stability. The calculation method of driver current: i=Vref*1.9/2.5. Default Vref is 0.65v, Default Current is 0.5a max current is 1A. Specification: Material: PCB Size: 20x15mm Package Includes: 1 Piecex TMC2100 Stepper Drivers 1 Piecex Heatsink 1 Piecex Screwdriver Note: Be sure not to connect the motor when measuring voltage, otherwise it is easy to burn the drive. When using the Ramps1.4 or MKS Gen, remove the three jumper caps under the socket The heat sink is attached directly to the PCB TMC2100 motor direction and A4988, DRV8825 just the opposite, if you want to directly replace the A4988, please adjust the firmware or adjust the motor connection
