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Fusion - Z axis goes to limit switch as soon as I send a job

Discussion in 'CAD' started by Eric Engel, Feb 25, 2024.

  1. Eric Engel

    Builder

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    I'm sure I'm doing something stupid here but I can't figure out what.

    These are the starting commands from my gcode. As soon as I send it, my Genmitsu Z axis rises to the limit switch (about 100 mm) and I have to reset, re zero (both y&x, and Z), and try again.

    Can anyone tell me what line of this code is causing that?

    (grace num1)
    (T1 D=1.5 CR=0 - ZMIN=-39 - flat end mill)
    G90 G94
    G17
    G21
    (When using Fusion for Personal Use, the feedrate of rapid)
    (moves is reduced to match the feedrate of cutting moves,)
    (which can increase machining time. Unrestricted rapid moves)
    (are available with a Fusion Subscription.)
    G28 G91 Z0
    G90

    (2D Pocket3)
    T1
    S10 M3
    G17 G90 G94
    G54
    G0 X119.716 Y50.111
    Z15
    G1 Z5 F300
    Z2.5 F100
    Z-36.35
    X119.705 Y50.127 Z-36.425
    X119.686 Y50.147 Z-36.452
    X119.664 Y50.163 Z-36.48
    X119.629 Y50.178 Z-36.49
    X119.592 Y50.183 Z-36.5



    Thanks
     
  2. Eric Engel

    Builder

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    Here's what the console on Candle says:

     
  3. Giarc

    Giarc OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    What post processor did you use, and did you home the machine before you started. It looks like the generic Fusion GRBL PP. If you want it to work, home your machine at the start of each session, and use the OpenBuilds post processor. docs:software:fusion360 [OpenBuilds Documentation]
     
  4. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    the stock GRBL post uses G28 which requires a bunch of knowl;edge to work correctly
    the openbuilds GRBL post uses G53, which only requires homing the machine to work correctly
     

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