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  1. #1
    hi. I am using fusion 360 to write the g code and then downloading it to mach 3. but when I start the milling program the tool just starts to drill into the work piece. the first line of the program is

    G90 G94 G91.1 G40 G49 G17



    I am sorry I don't have any means to cut and paste the rest of the program. can anyone help me out. at a lost what to do.

  2. #2
    Ger21's Avatar
    Lives in Detroit, United States. Last Activity: 16 Hours Ago Has been a member for 4-5 years. Has a total post count of 367. Received thanks 51 times, giving thanks to others 0 times. Referred 1 members to the community.
    The first line has nothing to do with why it's drilling into the work piece.

    Also, someone needs to fix that post, as G90 and G91.1 should not be on the same line.
    Gerry
    ______________________________________________

    Mach3 2010 Screenset

    JointCAM - CAM for Woodworking Joints

  3. #3
    Quote Originally Posted by Ger21 View Post
    The first line has nothing to do with why it's drilling into the work piece.

    Also, someone needs to fix that post, as G90 and G91.1 should not be on the same line.

    The MAch3 post as it stands in Fusion has some issues that I do not like either. For example it uses g91 and g91.1 that make your code be incremental and not absolute. I only noticed that it was using these as Ger's screen has a nice bar at the bottom telling what is active.

    The Linxcnc post is significantly simpler and I would recommend you give that one try.
    www.emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  4. #4
    Terry just up load the txt file because without it there's nothing we can do to help.

    Like the Lads say Fusion 360 Post processor is screwed up by the looks but without seeing the G-code it's impossible to tell what it's doing.

  5. #5
    Ger21's Avatar
    Lives in Detroit, United States. Last Activity: 16 Hours Ago Has been a member for 4-5 years. Has a total post count of 367. Received thanks 51 times, giving thanks to others 0 times. Referred 1 members to the community.
    According to the line above, it uses G90 and G91.1.
    The problem with them being on the the same line, is that if you are in G91 mode when you load the program, it won't switch to G90.
    Gerry
    ______________________________________________

    Mach3 2010 Screenset

    JointCAM - CAM for Woodworking Joints

  6. #6
    hi, this is the full g code to face the part.

    (WHEEL SLOTS CUT FRONT FACE WHEEL FIRST CUT 3MM)
    (T1 D=3. CR=0. - ZMIN=0. - FACE MILL)
    G90 G94 G91.1 G40 G49 G17
    G21
    G28 G91 Z0.
    G90
    (FACE2)
    M5
    M9
    T1 M6
    S5000 M3
    G54
    M9
    G0 X38.7 Y1.357
    G43 Z15. H1
    Z5.
    G1 Z0.3 F333.
    G18 G3 X38.4 Z0. R0.3
    G1 X36.75
    X0. F1000.
    G17 G2 Y4.185 R1.414
    G1 X36.75
    G3 Y7.013 R1.414
    G1 X0.
    G2 Y9.842 R1.414
    G1 X36.75
    G3 Y12.67 R1.414
    G1 X0.
    G2 Y15.498 R1.414
    G1 X36.75
    G3 Y18.327 R1.414
    G1 X0.
    G2 Y21.155 R1.414
    G1 X36.75
    G3 Y23.983 R1.414
    G1 X0.
    G2 Y26.812 R1.414
    G1 X36.75
    G3 Y29.64 R1.414
    G1 X0.
    G2 Y32.468 R1.414
    G1 X36.75
    G3 Y35.297 R1.414
    G1 X0.
    G18 G3 X-0.3 Z0.3 R0.3 F300.
    G0 Z15.
    G17
    M9
    G28 G91 Z0.
    G28 X0. Y0.
    M30

  7. #7
    Quote Originally Posted by komatias View Post
    The MAch3 post as it stands in Fusion has some issues that I do not like either.
    So they're not adequately supporting the most common controller software in the world?
    :-D

  8. #8
    Quote Originally Posted by magicniner View Post
    So they're not adequately supporting the most common controller software in the world?
    :-D
    Not sure people have actually submitted tickets to get the issues fixed. I haven't done so as I have learnt to live with it.
    www.emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  9. #9
    Hi.so the fault is something between the way the g code is written by fusion360 and the way mach 3 reads it. Ok but what is the fix?..

  10. #10
    In the post processor option, use the linuxcnc option. Cannot remember off the top of my head how it is described.

    Are you confident that you have the CAM model set up correctly? I can take a look for you if it helps. PM me your email and I will give you directions on how to do this.
    www.emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

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