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Thread: rotary axis

  1. #1
    Join Date
    Oct 2012
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    Default rotary axis

    Hi there, I have built a rotary axis for my lathe, and I have no idea how to calibrate it, can anyone out there help me out with ideas, instructions or even some clues, all will
    be greatly appreciated. I use UCCNC software, asked the same question on the UCCNC Forum but NO results.

    Regards
    Nick

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  3. #2
    Join Date
    Nov 2018
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    Default

    You could have a look at this page: Avid CNC Rotary Axis - the two installation and calibration guides may give you some ideas. They're mach4/avidCNC specific, but you may be able to do something similar with your setup.

    Basically uses the auto touch-off plate positioned on the tailstock to calibrate alignment; and a touch-off routine on a chuck locating pin.

  4. #3
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    Oct 2012
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    Default

    Thanks Bernmc, I had a look at the you tube but it's not what I am after, I have already calibrated the x and z axis, what I am after is the actual rotation part, how many steps needed to make 0ne full rotation of the Y axis, I have a 3 to one reduction pulley set up.
    Cheers
    Nick

  5. #4
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    Default

    Sounds like you want to know the number of steps a stepper motor has to make to turn the rotary axis.

    Like this:

    How to perform motor turing for a rotary axis?
    https://www.cnczone.com/forums/uccnc...are-forum.html

  6. #5
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    Default

    Re-reading the post. Stepper motors normally turn 1.8 degrees per step. 3:1 reduction means 0.6 degrees per step on your A axis. Note this is not Y. Rotation axis should not be X,Y or Z.

    At this rate you need 600 steps. Ie: 360 / 0.6 = 600.

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