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  1. #1
    Member BJM737's Avatar
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    Default A Axis

    I have added a stepper motor to my machine and enabled it as axis "A" in mach 3, Does anyone know how I can get the "A" axis stepper motor to rotate continuously? using G-Code? How can I set the speed? I have a stepper motor that has 0.6 Degrees per step.

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  2. #2
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    Default Re: A Axis

    If you want to do 4-axis machining, simply mounting a stepper to your mill's bed isn't going to help much. You really need a rotary table with a substantial gear ratio to withstand cutting forces that will tend to overpower the stepper. G-code commands don't tell steppers to rotate continuously, although you can direct it to advance to a large number of degrees. If you wanted continuous motion, it would be better to set it up as a spindle rather than an axis, and use M-codes to control it, using PID to set the speed. Usually a different sort of motor would be used for that, not a stepper. Or you could start with a lathe rather than a mill or router.

    Andrew Werby
    https://computersculpture.com/


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