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  1. 25-06-2016 #3
    magicniner's Avatar
    Lives in Rotherham, United Kingdom.
    magicniner
    Last Activity: 05-05-2024 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,021. Received thanks 230 times, giving thanks to others 42 times.
    It doesn't matter if you use inch or mm for setting up your motor steps per, if you've done it right the machine will run imperial or metric code accurately.
    .
    The body of each feature in the code is simply in numeric units and G20 or G21 in the header tells Mach 3 if those units will be interpreted as (G21) mm or (G20) inches.
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    G20 specifies imperial, G21 specifies metric so if you are getting accurate Inch moves with G21 then you have configured your system incorrectly and your steps per out by a factor of exactly 25.4 and your initial commanded moves in inches with G20 will have been simply huge!

    - Nick
    Last edited by magicniner; 25-06-2016 at 06:54 PM.
    You think that's too expensive? You're not a Model Engineer are you? :D
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