FAQ

This is the basic angle at which the driver sends a pulse signal to turn the motor. A complete 360 degrees circle divided by the step angle is the number of steps per motor revolution. For example, each full step of 7.5 degrees is a common step size rating, which is equivalent to 48 steps per revolution. The Epoch step motor has 0.9 and 1.8 degrees for HB, and PM has 3.7 degrees, 7.5 degrees, 15 degrees, and 18.0 degrees.

The step motor has a fixed number of steps per revolution. Microstepping is a way of increasing the number of steps by sending a sine/cosine waveform to the coils inside the stepper motor, which allows stepper motors to run smoother in low speed.

• It is recommended that the motor speed be slower or the acceleration/deceleration time be extended to confirm whether the motor PO torque cannot overcome the system dynamic load
• If it happend in the stationary, check whether the system static load has exceeded the holding torque.
• Check if the motor lead wire is badly soldered and whether it is connected to the controller signal.
• Check if the signal sent by the driver is disturbed.
• Check if the motor input current has reached the set value.
• Check the motor surface temperature, the high temperature will cause the torque to drop, in the worst case even the permanent demagnetization of the magnet.

1. Between driver and pulse generator : A. Shorten the wiring length B. The signal line is far away from the power
2. Between driver and power supply : A. Reduce noise with filters B. Confirm that the grounding is correct

• The stepper motor is driven by a pulse signal. Therefore, it is normal for the vibration to be felt by touching the motor housing with a hand during operation.
• The natural frequency of the stepping motor is in the low frequency range. It is recommended to operate at 400PPS or more. It can also be driven by half step or microstepping.
• Reduce the motor current.
• Confirm if the motor cable pins are correct, or whether the driver side welding is correct.

1. High torque at low speeds, and higher holding torque.
2. A pulse signal input is equal to one step angle of the motor, which is relatively easy to control the motor rotation angle.
3. Open-loop control using digital pulse signals makes the system simpler and low cost.
4. The rotation angle deviation does not accumulate.
5. One type of the brushless motor.
6. Fast response, easy to start, stop, forward and reverse transformation, acceleration and deceleration changes.