Calibrating my machine

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  1. #1
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    Default Calibrating my machine

    My first machine was belt driven and mach3 would calibrate. I changed to ball screws and i have been unable to calibrate. Any suggestions?

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    Default Re: Calibrating my machine

    By "calibration" do you mean finding the correct steps-per-unit values?



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    Default Re: Calibrating my machine

    Yes



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    Default Re: Calibrating my machine

    Those are pretty easy to calculate without using Mach3's wizard. Post some information about your machine:
    - ball screw thread pitch
    - ball screw number of starts
    - stepper motor degrees per step
    - stepper driver number of microsteps per step
    - any gearing between the stepper motor and the ball screw.



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    Default Re: Calibrating my machine

    SFU1605 RM1605 1605 Ball Screw
    Pitch is 5
    Start is 5
    Nema 23 57mm Stepper Motor High Torque
    200 steps





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    Default Re: Calibrating my machine

    You did not say what your microstepping is, but let's assume it's 8.
    Then your steps-per-millimeter would be:
    200*8/5=320.
    If you are using inches, multiply 320 by 25.4.

    P. S.
    According to the Internet, SFU1605 is single-start, not 5-start. So it has 5mm thread pitch and 5mm lead.



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    Default Re: Calibrating my machine

    16



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    Default Re: Calibrating my machine

    Then 200*16/5=640 steps per mm.



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    Default Re: Calibrating my machine

    Thank you for your help. When i am twicking movement when movement is more than requested do i add or substrat ?



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    Default Re: Calibrating my machine

    Thank you.



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    Default Re: Calibrating my machine

    If your ball screw is accurate (and it probably is), then the calibration should be spot on. But if you do need to tweak it, then BIGGER steps-per-unit means BIGGER movement.

    edited. sorry, got it wrong the first time.



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Calibrating my machine

Calibrating my machine