Introduction - If you have any usage issues, please Google them yourself
Basic functions: to achieve eight shot four stepper motor speed control: acceleration, constant speed, deceleration can button control rotating, and with sound, light alarm. Extension: 1, led digital display current ○ 1 power wait state, ○ 2 run state (forward and backward signs, acceleration, constant speed, deceleration, and the current speed grade.), ○ 3 stop state. 2, to achieve a given value of the speed control stepper motor.