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  1. #1
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    Join Date
    Jul 2010
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    13

    Unhappy Feed rate problem.

    Open program and load a code with say feed of F250 and press cycle start . Program runs a feed rate of 6mm min or just ticking over. Hit Stop , GOTO Zero ,Rewind code and cycle start and away we go , feed rate is whatever I have set in code . This only happens on initial cycle or each time I load Mach3. Any thoughts Appreciated.

  2. #2
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    Join Date
    Nov 2012
    Posts
    1101

    Re: Feed rate problem.

    Does your program specify units of measurement in the header (G20 or G21)?

  3. #3
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    Jul 2010
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    13

    Re: Feed rate problem.

    Quote Originally Posted by CitizenOfDreams View Post
    Does your program specify units of measurement in the header (G20 or G21)?
    THE LINES IN PROGRAM HEADER

    NO1 G21 G40 G49 G54 G80 G90 G91.1
    NO2 G53 Z0

  4. #4
    Registered
    Join Date
    Nov 2013
    Posts
    1220

    Re: Feed rate problem.

    Hi,
    when Mach3 loads and/or resets it defaults to what is a presumed safe feed rate of 6mm/min.

    If you wish to change that behavior then include a 'F300' or whatever in the pre program Gcode string, you can find and edit it in the Mach3 General settings
    page. I have not used Mach3 for nearly seven years because I adopted Mach4....and my memory fades on those little details.

    Craig

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