Need Help! Rotary Axis is using inches for degrees!


Results 1 to 8 of 8

Thread: Rotary Axis is using inches for degrees!

  1. #1
    Member scweaver59's Avatar
    Join Date
    Oct 2018
    Posts
    22
    Downloads
    0
    Uploads
    0

    Default 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

    Similar Threads:


  2. #2
    Member
    Join Date
    Mar 2008
    Location
    US
    Posts
    1762
    Downloads
    0
    Uploads
    0

    Default 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 GCnC Control
    Servo Control & ATC Retrofits


  3. #3
    Member scweaver59's Avatar
    Join Date
    Oct 2018
    Posts
    22
    Downloads
    0
    Uploads
    0

    Default 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
    Member
    Join Date
    Mar 2008
    Location
    US
    Posts
    1762
    Downloads
    0
    Uploads
    0

    Default 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 GCnC Control
    Servo Control & ATC Retrofits


  5. #5
    Member scweaver59's Avatar
    Join Date
    Oct 2018
    Posts
    22
    Downloads
    0
    Uploads
    0

    Default Re: Rotary Axis is using inches for degrees!

    Thank you so much!

    Steve Weaver



  6. #6
    Member scweaver59's Avatar
    Join Date
    Oct 2018
    Posts
    22
    Downloads
    0
    Uploads
    0

    Default 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
    Member
    Join Date
    Mar 2008
    Location
    US
    Posts
    1762
    Downloads
    0
    Uploads
    0

    Default 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 Axis is using inches for degrees!-rotary-rez-jpg  
    Gary Campbell GCnC Control
    Servo Control & ATC Retrofits


  8. #8
    Member scweaver59's Avatar
    Join Date
    Oct 2018
    Posts
    22
    Downloads
    0
    Uploads
    0

    Default Re: Rotary Axis is using inches for degrees!

    Thanks!

    Steve



  9. #9
    PhyllisSmith's Avatar
    Join Date
    Oct 2022
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default Re: Rotary Axis is using inches for degrees!

    We use inches for degrees, not centimeters. The reason is that it is easier to do calculations in inches and then you can check https://www.buybestcertificate.com/ and convert them to degrees. It's normal for the axis of a rotary axis to be oriented in degrees, as opposed to radians. The reason for this is that rotary motion requires an angle, and an angle requires a point at which to make the measurement.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

Rotary Axis is using inches for degrees!

Rotary Axis is using inches for degrees!