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unusual behaviour at the begining of a job

Discussion in 'OpenBuilds Forum Help' started by tommy arno, Jul 10, 2017.

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  1. tommy arno

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    I'm importing files to the universal gcode sender from fuision360, ive not used cutting bit yet, just using a ped until I get the hang of it. ive set the origin to the bottom front left corner of the stock. I set the same point as the zero point for my ox cnc, lowering the pen to just touch the spoil board, I then raise up the z to put material under the pen (router) but when I press send the z axis returns to zero (the spoil board) then the guantry moves up and to the right a bit. then returns to a corner of the piece I want to cut. and it waits there until I press resume. I would assume it would be at this point I should put the material in place, but the pen is too low for me to fit the material under it. its as if it has began cutting the first layer as when I resume the z doesn't change it just begins cutting the first layer
     
  2. Ryan Lock

    Ryan Lock Master
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    Hi,

    It would probably be easier to setup the zero at the top front left corner. Then you can just lower the Z down on to the piece, click reset zero, and you are good to go.
     
  3. tommy arno

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    I don't know if this is anything to do with it but
    that helps a little but the programme still pauses with the pen into the material
    heres my code that runs
    ok
    [GC:G0 G54 G17 G21 G90 G94 M5 M9 T0 F0 S0]
    ok
    >>> $J=G21G91Z-0.9F1000
    ok
    >>> G10 P0 L20 X0 Y0 Z0
    ok
    Skipping command #4
    Skipping command #5
    Skipping command #6
    >>> G90
    >>> G94
    >>> G17
    >>> G21
    >>> G28
    >>> G91Z0
    >>> G90
    Skipping command #14
    Skipping command #15
    >>> M9
    >>> T1
    >>> M6
    >>> S10000M3
    >>> G54
    >>> M8
    >>> G0X33.279Y11.14
    >>> Z15
    >>> Z5
    >>> G1Z3F1200
    >>> Z-1.5
    >>> G18
    >>> G3X32.779Z-2I-0.5
    ok
    >>> G1X32.279
    ok
    >>> G17
    ok
    ok
    ok
    ok
    ok
    >>> G3X31.779Y10.64J-0.5
    ok
    >>> G1Y0
    ok
    error: Unsupported command: Unsupported or invalid g-code command found in block.
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
    ok
     
  4. tommy arno

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    >>> G1Y0
    is there a problem with this bit?
     
  5. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder

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    Hi
    you need to
    learn to set up your machine correctly (ie follow the convention for machine 0,0,0 so that G28 is safe, and turn off any of UGS's filters)
    and
    change settings on the post processor (turn off G28 and tool changes, if possible)
    or
    change to a different post processor ( ie, use the one Strooom and I and others tuned for GRBL)
    GitHub - Strooom/GRBL-Post-Processor: Start

    Critically, machine zero must be with Z at the top of travel. (ie, where you turn it on) This makes the assumptions that Gcode post processors make about using G28 and G53 valid. If you don't do it, you will break bits, ruin workpeices and generally have a bad time until you do follow the convention.

    Be sure you know where you put the 0,0,0 reference in Fusion, THAT is where you set work co-ordinate 0,0,0 on the material.
     
    Joe Santarsiero likes this.
  6. tommy arno

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    Thanks for the reply I'll try al that out tomoriw and see how I get on
     
  7. tommy arno

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    how do I download that other post processor?
     
  8. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder

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    click the big green button
    chose 'download zip'
    after download, unzip the zip file
    point fusion at the 'openbuildsgrbl.cps' file
     

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