Reply To: VRef for A4988 drivers (especially for joint 4)

#2327
Angel LM
Admin

    Hello AliSintax!

    You are using the same stepper model for articulations 5&6, right? If so, you are experiencing the same issue with those steppers?

    I can think in 3 possible issues:
    1. Maybe the art4 driver is broken and is not working well. To check it just switch the driver with any other and try to move the motor.
    2. The wires of the stepper are not well connected. Sometimes the manufacturer messes up with the position of the wires in the connector of the steppers. They should be placed in order: 1A1B2A2B. A quick way to check the wires is, with the motor disconnected, connect a wire between two of the motor connector pins. If you try to turn the motor shaft by hand and it generates a higher resistance than when the wire is not connected, it means that the pins you have connected correspond to the pins of one of the coils (1A1B) for example.
    3. The max speed or acceleration value is set too high. Check that the $parameters match with the ones posted here.

    Hope it helps!