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  1. #1
    Join Date
    Jan 2007
    Posts
    206

    Question Post modification

    Can someone help me figure out where to place a position move in the beginning of my Post?
    Basically this is what I am trying to do.

    O0
    G20
    G0G17G40G49G80G90
    T6M6
    G53Z5. <----------------------------------------------- I want to be able to insert this here just before the start of the program
    G187P3E.025
    G0G90G54X0.Y0.S1400M3
    G43H6Z3.
    Z.05
    G1Z0.F25.
    X-.6648F8.
    G0Z3.
    G53Z0.
    G53Y0.
    M30.
    To some this will not make sense and I do not need an explanation. I just need some advice on how to accomplish this.
    Thanks in advance!!
    All comments made are my opinion!

  2. #2
    Join Date
    Dec 2008
    Posts
    3216

    Re: Post modification

    You're right, no real sense as G53 Z5. is 5mm above the soft limit of the machine, usually you can't go higher than Z0....
    If your spindle needs to return to G53 Z0. AFTER a toolchange, WHY is it not commanded within the M6 routine.
    And then you don't need to edit the post.

    So
    #1 - save a copy of the post, BEFORE any editing ( so you can restore it if you f@#$ up ).
    #2 - open post with an ascii editor, & find a section "psof$" (this is the start of output file), then look for a line containing "sm06, *t$..." , this is the toolcall and change line.
    #3 - insert a line after the toolcall line (after the stagetool line also, if it exists) and type the following.... "G53 Z5.", e$ # added 27-May-2025
    #4 - save post .... don't exit the editor yet
    #5 - test it

    An e$ is like a end of block for each output line of code.
    The quotes ("") are to state the actual characters to be placed into the post.

  3. #3
    Join Date
    Jan 2007
    Posts
    206

    Re: Post modification

    I apologize for the confusion but for starters my machine is a VF8 and the the Spindle can travel just short of 5 INCHES or 127mm past Z0, the Post is now modified to travel G53 Z4.5 at the end of the Cycle and the reason for that is simply because it will cash the part if I use Z0.
    For the most part the z and y 0 are fine but I frequently do parts that require the "extra" height. That is what happens in a "Job Shop" LOL
    I do appreciate the Info as this has answered the question without me having to do a ton of research.
    Here is a little fun Fact for you!! I live in "Metropolis" IL. LOL
    All comments made are my opinion!

  4. #4
    Join Date
    Dec 2008
    Posts
    3216
    Quote Originally Posted by Rally View Post
    Here is a little fun Fact for you!! I live in "Metropolis" IL. LOL
    I knew there had to be a reason for a +ive Z value.

    A bit of a coincidence.

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