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IndustryArena Forum > Machine Controllers Software and Solutions > G-Code Programing > Cutting a curve in a flat piece of acetal

Thread: Cutting a curve in a flat piece of acetal

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  1. 03-30-2014, 06:54 PM #1
    dominic87
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    Cutting a curve in a flat piece of acetal

    Hi,

    I was wondering anyone could help me. I've got a piece of flat acetal, which is 10mm thick and I would like to mill a curve into it.
    The part is 35mm in width and 20mm in depth by 10mm in height, like the image suggests.



    I literally just want to mill a curve into the flat piece of acetal, it doesn't need to be perfect as it's simply spacer.

    Any suggestions on gcode? I did try using gsimple to write the code, but unfortunately doesn't work like that.

    Thanks for your time.
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  2. 03-31-2014, 04:47 AM #2
    dcoupar
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    Re: Cutting a curve in a flat piece of acetal

    What's the radius?
    What's the depth of the radius?
    What size ball end mill?
    What control?
    Which way is the part oriented? 35 mm along x-axis, or 20mm along x-axis?
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  3. 03-31-2014, 04:13 PM #3
    dominic87
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    Re: Cutting a curve in a flat piece of acetal

    Apologies if some of my info seems amateurish, but that's because I am. Still learning.

    Quote Originally Posted by dcoupar View Post
    What's the radius?
    The radius is 52mm

    Quote Originally Posted by dcoupar View Post
    What's the depth of the radius?
    The centre point of the radius is 20.582 above zero of the work piece.


    Quote Originally Posted by dcoupar View Post
    What size ball end mill?
    I plan to use 4mm

    Quote Originally Posted by dcoupar View Post
    What control?
    Mach3

    Quote Originally Posted by dcoupar View Post
    Which way is the part oriented? 35 mm along x-axis, or 20mm along x-axis?
    20mm X axis.


    Thanks very much for helping.
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  4. 03-31-2014, 11:33 PM #4
    Kiwi
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    Re: Cutting a curve in a flat piece of acetal

    I believe your arc radius is 26mm
    I don't know mach3 code but here is some code to get you started.
    G19
    G00 X0 Y1.1643 Z4
    G01 Z1 F400
    N10 G90 G02 Y33.8357 Z1 R26
    G91 G01 X0.25
    G90 G03 Y1.1643 Z1 R26
    G91 G01 X0.25
    Goto N10 (Repeat 19)
    G90
    G17
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  5. 04-03-2014, 05:17 PM #5
    dominic87
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    Re: Cutting a curve in a flat piece of acetal

    thanks Kiwi.

    Any assistance is greatly appreciated.
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  6. 04-03-2014, 06:16 PM #6
    rowbare
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    Re: Cutting a curve in a flat piece of acetal

    Turn it sideways, set a fly cutter or boring bar to the appropriate diameter and plunge.

    bob
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  7. 04-03-2014, 07:04 PM #7
    dominic87
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    Re: Cutting a curve in a flat piece of acetal

    I would turn it sideways, but unfortunately due to being able to clamp the work piece properly, it's easier to clamp it flat down in this instance.

    Anyway, here is my final code...
    %
    (TACHOMETER SENSOR CURVE PROGRAM)
    G19 (Y-Z PLANE SELECTION)
    G21 (PROGRAM IN METRIC)
    F10 (SET FEED RATE)
    M03 S6000 (START THE SPINDLE)

    G00 X0 Y1.1643 Z4
    G01 Z1 F400
    M98 P100 L19 (Repeat the subroutine 19 times)

    G90
    G17 (SELECT THE XY PLANE)
    M30 (PROGRAM END)

    O100
    G90 G03 Y33.8357 Z1.0 R26
    G91 G01 X0.25
    G90 G02 Y1.1643 Z1.0 R26
    G91 G01 X0.25
    M99

    %

    It did the job perfectly! :cheers:
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