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GRBL Spindle Control Easy Driver

Discussion in '3D printers' started by AndrewG, Nov 19, 2016.

  1. AndrewG

    AndrewG New

    Nov 19, 2016
    Likes Received:
    Hi Open Builds community,

    I am building a 3d printer from scrap and am looking to use the spindle control within GRBL to drive an a4988 (Easy Driver) controller to run a stepper motor.

    I have un-commented USE_SPINDLE_DIR_AS_ENABLE_PIN in config.h and have experimented with different settings for SPINDLE_MAX_RPM.

    I have PIN 13 going to DIR and PIN 11 to STEP on the Driver.

    I am able to get the motor to make a high pitched noise by sending a M3 S100 command, if I disconnect PIN 11 the motor will run for a bit and then stop.

    I know I am missing something here and would be very grateful for some expertise, I have Googled as much as I can. I suspect I am getting muddle between output for the spindle and the input to the easy driver but admit am a bit of a newbie to this and now a bit stuck.

    Thanks for reading.

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