TMC2100 Stepper Motor Driver
1, the drive current algorithm: i = Vref * 1.9 / 2.5, the default Vref about 0.65v, so the default
current 0.5A, the maximum current 1A!
2, Vref measures Gnd and potentiometer middle end voltage.
3, when measuring voltage must not connect the motor, or easy to burn drive.
4, measuring voltage should be connected to power, do not just connect the USB power supply.
Note: when you use the TMC2100, some tips you need to follow.
1, Adjust the potentiometer with a special ceramic screwdriver. Otherwise, the drive is easy to be damaged.
2, The heat sink on the drive block is stuck to the middle of the chip (the other driver is the same), otherwise, it is liable to be shortened in current with the next pin.