1. Inspect the Motor
Swap the A+ and A- wires, or swap the B+ and B- wires, and check whether the motor's direction of rotation changes.
If swapping either pair of wires reverses the motor direction, the motor is functioning correctly.
2. Troubleshoot the Driver
2.1 Check the Driver Connector
Disconnect and reconnect the driver connector, ensuring all pins are fully seated, then check whether the motor operates correctly in both directions.
If a known-good driver is available, swap the connector from the known-good driver to the faulty driver and check whether the motor operates correctly in both directions.
2.2 Check the Driver Settings and Hardware
Some drivers allow you to reverse the motor rotation direction via a DIP switch. Check whether the motor rotation direction changes after adjusting the DIP switch.
Verify that the 5V/24V DIP switch on the top of the driver is set correctly. If the DIP switch is set to 5V but the actual input signal voltage is 24V, internal components of the driver may be damaged, which can cause the motor to rotate in only one direction.
⚠️ Warning: Always verify that the DIP switch setting matches your signal voltage before powering on.
Swap the driver with a known-good unit to confirm whether the driver is functioning properly.
3. Troubleshoot the Cables
Inspect the motor cables for disconnections or poor contacts.
If a known-good extension cable is available from another working setup, swap it in place of the current cable and check whether the motor operates correctly in both directions.
4. Check the Controller and Signals
Verify the following:
- The controller circuit is functioning correctly.
- The controller is outputting direction and pulse signals as expected.
- The signal voltage matches the driver's required input voltage (e.g., 5V or 24V).