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wirelessly control a stepper motor

Ross Zhao
Prodigy 10 points

Other Parts Discussed in Thread: DRV8452, DRV8434S, DRV8434, DRV8462, DRV8461

I want to use a CNC machine to wirelessly control a stepper motor, but the problem I encountered is that the CNC machine cannot be connected to Modbus. Do you have any solution? Thanks!

  • 0
    TI__Guru 56105 points

    Hi Ross,

    Were you considering a wireless Modbus? In an industrial environment such as with a CNC wireless link must be robust. What interfaces are available in the CNC machine? What is the specification for the stepper motor, operating voltage and target full-scale current IFS for the motor. We have several stepper motor drivers that could be used to drive the motor itself. Examples would be DRV8434, DRV8434S, DRV8452, DRV8462, DRV8462 and we have several other drivers depending on supply voltage, current and microstep requirements. These drivers are usually controlled by a microcontroller. Our evaluation kits EVM typically has a microcontroller with USB to serial interface controlling the stepper driver. You can consider modifying this to use an industrial Bluetooth for example for wireless control. Thanks.

    Regards, Murugavel

  • 0 in reply to Murugavel4637
    Prodigy 10 points

    Hi Murugavel,

    Thank you for your reply. Yes, the solution I am currently considering is wireless Modbus. Can your evaluation kits EVM drivers be controlled using G codes from CNC machines? If possible, I will try your Bluetooth wireless control stepper motor solution.

    Best, 

    Ross

  • 0 in reply to Murugavel4637
    Prodigy 10 points

    Hi Murugavel,

    My CNC machine only has USB interface. The stepper motor operating voltage is 24, target full-scale current is 3A. Thanks ,Ross

  • 0 in reply to Ross Zhao
    TI__Guru 56105 points

    Hi Ross,

    EVM driver use virtual com port VCP.  EVMs cannot be controlled using G-codes. There are microcontroller boards available in the open market that can accept G-code and drive a stepper motor driver. You may want to check with those. For 3A stepper driver you may have to consider the DRV8461 or the DRV8452 stepper motor drivers.

    Regards, Murugavel