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Project cutting larger than needed and machine

Discussion in 'General Talk' started by Chance Houston, Oct 7, 2022.

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  1. Chance Houston

    Chance Houston New
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    Hello, super newb here. I put my machine together last week. I am using Vcarve. I get my project looking awesome in vcarve and cut my tool path. When the machine starts it enlarges everything. A project that should be 44 inches long is coming out 47 inches. I do have the control builds controller instead of a laptop to run my machine. I would like to not crash my machine anymore. Thanks for the advice ahead of time.
     
    #1 Chance Houston, Oct 7, 2022
  2. Alex Chambers

    Alex Chambers Master
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    You need to calibrate your steps/mm - leadscrews are not absolutely accurate. Openbuilds control has a wizard for that.
    Alex.
     
    #2 Alex Chambers, Oct 7, 2022
  3. Chance Houston

    Chance Houston New
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    Thank you for the reply! How do I do that with the interface?
     
    #3 Chance Houston, Oct 8, 2022
  4. David the swarfer

    David the swarfer OpenBuilds Team
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    this resource
    HOWTO Calibrate your CNC Machine for MACH3 or GRBL
    will teach you how to do the calibration manually.
    Using those methods, you can use the Interface to jog manually to do the calculations but I don't know how you would input the new steps/mm numbers.
    So I think you are left with disconnecting the Interface and connection a computer with CONTROL and just use the wizard there.
     
    #4 David the swarfer, Oct 10, 2022
    Alex Chambers likes this.
  5. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Interface > Tools and Utils > Edit Grbl Settings > scroll down to Steps per mm

    It is a lot easier to use the Wizards yes. If you have a PC nearby its worth it just to avoid doing the math by hand

    See

     
    #5 Peter Van Der Walt, Oct 10, 2022
    Banjopete and David the swarfer like this.

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