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IndustryArena Forum > CAM Software > Mastercam > Machining Sphere - WaterLine- Part Damaged
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  1. #1
    Join Date
    Oct 2009
    Posts
    59

    Machining Sphere - WaterLine- Part Damaged

    Hello all,
    I have a weird toolpath problem which I want to share.
    I want to machine a half sphere with 250 mm radius, with mastercam and 85 mm endmill.
    I choose waterline toolpath, when the machine starts to machine the part, it goes in circles machining the part, all seems to go fine, BUT all suddenly the tool does not follow the circlular path as it seems in backplot and goes STRAIGHT IN the sphere damaging the part and stop the machine.

    Any ideas?

  2. #2
    Join Date
    Nov 2013
    Posts
    152

    Re: Machining Sphere - WaterLine- Part Damaged

    Hi this may not be much help as I don`t use mastercam but I do use alphacam and have had the same problem. My method , although maybe not the best , is I view the tool path closely to see if there are any obvious visible glitches and if I find any then I break the toolpath before the glitch and then it runs fine albeit with a brief pause before taking up the feed again.It is crude but it works for me.
    Hope this is of someuse to you.
    Cheers Syd

  3. #3
    Join Date
    Mar 2008
    Posts
    683

    Re: Machining Sphere - WaterLine- Part Damaged

    Check the toolpath tolerances in the "gap settings" and try setting it to "follow surface" also. .

  4. #4
    Join Date
    Oct 2009
    Posts
    59

    Re: Machining Sphere - WaterLine- Part Damaged

    Quote Originally Posted by Routerfiend View Post
    Hi this may not be much help as I don`t use mastercam but I do use alphacam and have had the same problem. My method , although maybe not the best , is I view the tool path closely to see if there are any obvious visible glitches and if I find any then I break the toolpath before the glitch and then it runs fine albeit with a brief pause before taking up the feed again.It is crude but it works for me.
    Hope this is of someuse to you.
    Cheers Syd


    Thank you for the reply,

    Unfortunately no visible glitches found,

  5. #5
    Join Date
    Oct 2009
    Posts
    59

    Re: Machining Sphere - WaterLine- Part Damaged

    Quote Originally Posted by warrenb View Post
    Check the toolpath tolerances in the "gap settings" and try setting it to "follow surface" also. .
    In waterline toolpath there is no Gap settings or follow surface settings,
    There is however in Contour toolpath.

  6. #6
    Join Date
    Oct 2009
    Posts
    59

    Re: Machining Sphere - WaterLine- Part Damaged

    Maybe the problem is the " Keep tool down" ? In my case there is a value of 100% of tool radius, so maybe the tool wants to change position of maching
    and "keep tool down" causes to crash. Can someone explain the keep tool down?

    Other options is spiral and contour toolpath.
    But spiral toolpath makes large gaps in bottom of part, see pisture.

  7. #7

    Re: Machining Sphere - WaterLine- Part Damaged

    DId you get this solved? If not upload a file and I'll help you.

  8. #8
    Join Date
    Jul 2003
    Posts
    1220

    Re: Machining Sphere - WaterLine- Part Damaged

    Is this the type of code you need
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    G01 X92.1674 Y0 Z245.0166 F50
    G02 X92.1674 Y0 I-92.1674 J0 F400
    G01 X101.9257 Y0 Z242.8345 F50
    G02 X101.9257 Y0 I-101.9257 J0 F400
    G01 X111.589 Y0 Z240.2638 F50
    G02 X111.589 Y0 I-111.589 J0 F400
    G01 X121.1417 Y0 Z237.3088 F50
    G02 X121.1417 Y0 I-121.1417 J0 F400
    G01 X130.5686 Y0 Z233.9742 F50
    G02 X130.5686 Y0 I-130.5686 J0 F400
    G01 X139.8546 Y0 Z230.2652 F50
    G02 X139.8546 Y0 I-139.8546 J0 F400
    G01 X148.9849 Y0 Z226.1879 F50
    G02 X148.9849 Y0 I-148.9849 J0 F400
    G01 X157.9448 Y0 Z221.7487 F50
    G02 X157.9448 Y0 I-157.9448 J0 F400
    G01 X166.7201 Y0 Z216.9548 F50
    G02 X166.7201 Y0 I-166.7201 J0 F400
    G01 X175.2966 Y0 Z211.8138 F50
    G02 X175.2966 Y0 I-175.2966 J0 F400
    G01 X183.6607 Y0 Z206.3339 F50
    G02 X183.6607 Y0 I-183.6607 J0 F400
    G01 X191.7989 Y0 Z200.5239 F50
    G02 X191.7989 Y0 I-191.7989 J0 F400
    G01 X199.6983 Y0 Z194.3931 F50
    G02 X199.6983 Y0 I-199.6983 J0 F400
    G01 X207.3462 Y0 Z187.9514 F50
    G02 X207.3462 Y0 I-207.3462 J0 F400
    G01 X214.7304 Y0 Z181.209 F50
    G02 X214.7304 Y0 I-214.7304 J0 F400
    G01 X221.8391 Y0 Z174.1766 F50
    G02 X221.8391 Y0 I-221.8391 J0 F400
    G01 X228.6608 Y0 Z166.8657 F50
    G02 X228.6608 Y0 I-228.6608 J0 F400
    G01 X235.1848 Y0 Z159.2877 F50
    G02 X235.1848 Y0 I-235.1848 J0 F400
    G01 X241.4004 Y0 Z151.455 F50
    G02 X241.4004 Y0 I-241.4004 J0 F400
    G01 X247.2979 Y0 Z143.38 F50
    G02 X247.2979 Y0 I-247.2979 J0 F400
    G01 X252.8678 Y0 Z135.0755 F50
    G02 X252.8678 Y0 I-252.8678 J0 F400
    G01 X258.1011 Y0 Z126.555 F50
    G02 X258.1011 Y0 I-258.1011 J0 F400
    G01 X262.9895 Y0 Z117.832 F50
    G02 X262.9895 Y0 I-262.9895 J0 F400
    G01 X267.5251 Y0 Z108.9206 F50
    G02 X267.5251 Y0 I-267.5251 J0 F400
    G01 X271.7008 Y0 Z99.8348 F50
    G02 X271.7008 Y0 I-271.7008 J0 F400
    G01 X275.5098 Y0 Z90.5894 F50
    G02 X275.5098 Y0 I-275.5098 J0 F400
    G01 X278.946 Y0 Z81.199 F50
    G02 X278.946 Y0 I-278.946 J0 F400
    G01 X282.004 Y0 Z71.6788 F50
    G02 X282.004 Y0 I-282.004 J0 F400
    G01 X284.6788 Y0 Z62.0438 F50
    G02 X284.6788 Y0 I-284.6788 J0 F400
    G01 X286.9662 Y0 Z52.3096 F50
    G02 X286.9662 Y0 I-286.9662 J0 F400
    G01 X288.8624 Y0 Z42.4917 F50
    G02 X288.8624 Y0 I-288.8624 J0 F400
    G01 X290.3646 Y0 Z32.6059 F50
    G02 X290.3646 Y0 I-290.3646 J0 F400
    G01 X291.4702 Y0 Z22.6679 F50
    G02 X291.4702 Y0 I-291.4702 J0 F400
    G01 X292.1775 Y0 Z12.6936 F50
    G02 X292.1775 Y0 I-292.1775 J0 F400
    G01 X292.4854 Y0 Z2.699 F50
    G02 X292.4854 Y0 I-292.4854 J0 F400
    G01 X292.5 Y0 Z0 F50
    G02 X292.5 Y0 I-292.5 J0 F400

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