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IndustryArena Forum > Machine Controllers Software and Solutions > WinCnc > Rotary Axis is using inches for degrees!
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  1. #1

    Join Date
    Oct 2018
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    13

    Rotary Axis is using inches for degrees!

    Today, while running a test piece on my rotary axis using Aspire 9.510 and Wincnc, I was making a rounding tool path on a 4X4 post. I set the Rounding Tool project up as per the Vectric instructions, and the machine worked well. However, instead of the (for my machine) B-axis turning 360º per cut, it was turning 360" per cut (that's 35 revolutions)! What am I doing wrong? Is this something in the post processor that needs to be corrected? Is it a setting in the G-code? If I can get the B-axis to recognize degrees instead of inches, I think things will work great! Any ideas?

    Steve Weaver
    newbe

  2. #2
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    Mar 2008
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    1734

    Re: Rotary Axis is using inches for degrees!

    If you command the B axis to zero, then command B360, does it execute 1 revolution? If not then your steps/unit are incorrect

    What type of axis is the B defined as in the INI?

    Are you using a Rotary Wrapped post processor in Aspire? Which one?
    Gary Campbell CNC Technology & Training
    GCnC411 (at) gmail.com www.youtube.com/user/Islaww1/videos

  3. #3

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    Oct 2018
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    13

    Re: Rotary Axis is using inches for degrees!

    1.- Okay! When I input B360 the B-axis turned 360 inches (that is, Approximately 35 revolutions.

    2.- This is the only settings for B-axis I find in the INI

    [B Axis]
    axisspec=p0 s4 d4 r2000 a2200 o0 t4
    axisvel=r1500 f300 s150 m500 h1500

    3.- I'm using WinCNC Rotary X9*.tap)

  4. #4
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    Re: Rotary Axis is using inches for degrees!

    The "r" parameter on the axis spec line is the issue. It needs to be set to steps per degree. to arrive at the correct number you will calculate as follows:

    Motor steps per rev * reduction ratio / 360
    Gary Campbell CNC Technology & Training
    GCnC411 (at) gmail.com www.youtube.com/user/Islaww1/videos

  5. #5

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    Oct 2018
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    Re: Rotary Axis is using inches for degrees!

    Thank you so much!

    Steve Weaver

  6. #6

    Join Date
    Oct 2018
    Posts
    13

    Re: Rotary Axis is using inches for degrees!

    These are the figures of the motor/gearbox:
    Neugart PLS70--- 1=10
    F-Nr 2040332 - 1 -008
    OP .UN. 02/2009
    If any of these make sense to you.
    I'm very new at this so I'm not sure how to find the steps-per revolution or the reduction ratio.

  7. #7
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    Re: Rotary Axis is using inches for degrees!

    Those are not really numbers that jump off the page as definitive, but assuming your motor is a common 200 steps per rev, here are the numbers that you can pick from to match the settings on the drive.
    Attached Thumbnails Attached Thumbnails Rotary REZ.jpg  
    Gary Campbell CNC Technology & Training
    GCnC411 (at) gmail.com www.youtube.com/user/Islaww1/videos

  8. #8

    Join Date
    Oct 2018
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    13

    Re: Rotary Axis is using inches for degrees!

    Thanks!

    Steve

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