Troubleshooting Stepping Motor
6.1 I have wired up the stepper motor for testing. I checked the resistance and found them around 3R. If I power them with 12V, current would be 4A, and when disconnecting, might create a back EMF of perhaps a couple of time of 12V or around 30V+. I think to play safe, I should monitor the coil current and start with only 6V.
Troubleshooting Stepping Motor
6.1 I have wired up the stepper motor for testing. I checked the resistance and found them around 3R. If I power them with 12V, current would be 4A, and when disconnecting, might create a back EMF of perhaps a couple of time of 12V or around 30V+. I think to play safe, I should monitor the coil current and start with only 6V.
5.1 WARNING: Do not connect or disconnect motor when A4988 power is on. Reason: motor coils are inductive devices. Back EMF when switch off coil current might fry A4988.
5.2 This basic test is for full step mode. Connect MS1, MS2, and MS3 to ground. Do not leave them floating, though datasheet says OK to do so.
5.1 WARNING: Do not connect or disconnect motor when A4988 power is on. Reason: motor coils are inductive devices. Back EMF when switch off coil current might fry A4988.
5.2 This basic test is for full step mode. Connect MS1, MS2, and MS3 to ground. Do not leave them floating, though datasheet says OK to do so.
