Sequre Nema 23 closed Loop Stepper Motor
A open 4, calibration mode. First reverse, then smooth. Step angle 1.8 degree

B open 3, open loop mode. 1024 pulses per turn

C open 1, 3. Open loop mode. 2048 pulses per turn

D open 2, 3. Closed loop mode. 4096 pulses per turn

E open 1, 2, 3. Closed loop mode., 8192 pulses per turn
F enable signal

G direction control

Steps video