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  1. #21
    Join Date
    Nov 2015
    Posts
    67

    Re: CNC egg shell carving

    [QUOTE=JohnReierson;1834592]

    Based on the picture the probe and spindle mount appear to be 3d printed?
    [It is nylon, turned by a lathe. Tried before 3D printing, but the concentricity is not good.]

    Is the rotational axis that drives the spindle driven by a worm gear?
    [Yes originally. But changed to other gear drive with less backlash.]

    What made you decide to build this machine?
    [Just for fun originally. Right now making a bigger one for Ostrich egg shell. Try to develop some business opportunity ]


    I only have experience running a simple lathe or mill cnc: Is it harder to program this machine due to the two rotational axes (specifically the one that moves the spindle)? Are you running Mach3? If so, was it hard to set up the rotational axis to work on a cartesian coordinate system?
    [I am using Mach2. I just cheat the system that I am working on 3 linear axis, that are X,Y and Z axis. Experience in CNC milling is more than sufficient]

    I was thinking of building a SCARA 3d printer, but I have no idea how I would program it to work.
    [Tons of learning materials in the net. Just spare some time for it will be OK ]

  2. #22
    Join Date
    Dec 2009
    Posts
    166

    Re: CNC egg shell carving

    Hi I am interested in what software you used to do the probing
    I just tested 4th axis probemaster in mach3
    and I am a little confused because the data created is in x,y,z which is fine, but there is rotational data
    so when I import the data into Mastercam it comes in with all lines in the same plane.

  3. #23
    Join Date
    Nov 2015
    Posts
    67

    Re: CNC egg shell carving

    Quote Originally Posted by squirrel_41 View Post
    Hi I am interested in what software you used to do the probing
    I just tested 4th axis probemaster in mach3
    and I am a little confused because the data created is in x,y,z which is fine, but there is rotational data
    so when I import the data into Mastercam it comes in with all lines in the same plane.
    Hi Squirrel,
    Got no idea on the Mach3 probemaster, as I am still using the old Mach2.
    And I wrote my own program to do the probing, used the old Visual Basic 6

  4. #24
    Join Date
    Dec 2009
    Posts
    166

    Re: CNC egg shell carving

    Okay I can do do the programing but I need to be pointed in the right direction
    the 4th axis probemaster returns all values for y as 0
    So for all intents this is the same as a "single line 2d surface probe" moving only in the x direction with a z height
    So if Y was converted to a value equal to the 4th axis rotation in a flat plane the data should represent a undulating 2d surface that I should be able to roll 360 Degrees.
    ???.

    Or can I get a copy of your probe routine.
    Cheer's.

    Okay I think I have a simple fix I'll create a program to rotate all data at X degrees a round the rotary axis.

    Okay I built a macro in Mach3 that does all the conversion works real good.

  5. #25
    Join Date
    Feb 2016
    Posts
    1

    Re: CNC egg shell carving

    amazing

  6. #26
    Join Date
    Nov 2015
    Posts
    67

    Re: CNC egg shell carving

    Drilled 18.750 holes by 0.3mm dia PCB drill bit.
    Position accuracy deteriorated significantly after drilled by about 2000 holes.
    But luckily, no drill bit breakage after all holes have been drilled.



    Attached Thumbnails Attached Thumbnails 1.jpg   2.jpg   2.jpg  

  7. #27
    Join Date
    May 2015
    Posts
    1422

    Re: CNC egg shell carving

    Gosh.

    How long did THAT take?

  8. #28
    Join Date
    Nov 2015
    Posts
    67
    Quote Originally Posted by dharmic View Post
    Gosh.

    How long did THAT take?
    19 hours !

  9. #29
    Join Date
    Nov 2015
    Posts
    67
    Quote Originally Posted by dharmic View Post
    Gosh.

    How long did THAT take?
    19 hours !

  10. #30
    Join Date
    Jan 2011
    Posts
    188

    Re: CNC egg shell carving

    golly - a chicken takes 26 hours to make an egg - amazing - the egg and the carving - I love seeing these - keep 'em coming....
    www.signtorch.com

  11. #31
    Join Date
    Nov 2015
    Posts
    67

    Re: CNC egg shell carving


  12. #32
    Join Date
    Nov 2015
    Posts
    67

  13. #33
    Join Date
    Jun 2010
    Posts
    4256

    Re: CNC egg shell carving

    Boggle!
    Amazing stuff.

    Cheers
    Roger

  14. #34
    Bunos dias .
    busco planos para la construccion de una cnc pequeña para iniciarme en este tipo de trabajos

  15. #35
    Join Date
    Dec 2009
    Posts
    166

    Re: CNC egg shell carving

    Quote Originally Posted by uvvvvw View Post
    Hi Squirrel,
    Got no idea on the Mach3 probemaster, as I am still using the old Mach2.
    And I wrote my own program to do the probing, used the old Visual Basic 6
    What are these eggs from chicken, duck, emu
    thanks

  16. #36
    Join Date
    May 2015
    Posts
    1422

    Re: CNC egg shell carving

    wow.

  17. #37
    Join Date
    Nov 2015
    Posts
    67

    Re: CNC egg shell carving

    Quote Originally Posted by squirrel_41 View Post
    What are these eggs from chicken, duck, emu
    thanks
    Goose mainly.

  18. #38
    Join Date
    Dec 2009
    Posts
    166

    Re: CNC egg shell carving

    Thanks for that I have tried standard egg shells but the shell always break
    they are really thin.

  19. #39
    Join Date
    Jun 2010
    Posts
    4256

    Re: CNC egg shell carving

    Of course, if you used a very fine sand-blast jet, or a laser, you might manage those too?

    Cheers

  20. #40
    Join Date
    Nov 2015
    Posts
    67

    Re: CNC egg shell carving

    Rio 2016 Olympic Logo

    Attachment 319334

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