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  1. #85
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    Default Re: CNC egg shell carving

    Quote Originally Posted by uvvvvw View Post
    Used a new router bit. The result is a bit better.
    Added a hollow out pattern on the other side also.

    Attachment 351976

    Attachment 351980
    Is this the opposite side of the Steve Jobs carving? Does it change the light transmission through the carving?

    Sent from my SM-N920V using Tapatalk



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    Default Re: CNC egg shell carving

    yes, it is the opposite side.
    i turned off the LED inside the egg shell while i took the photo of this side.



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    Default Re: CNC egg shell carving

    wonderful! CNC egg shell carving-2-gif

    E-mail: manager@elephant-cnc.com Web: www.elephant-cnc.com
    --------------Jinan Blue Elephant CNC Machinery Co., Ltd-------------


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    Default Re: CNC egg shell carving

    Hi UVVVVW,

    I would love t have a copy of the VB6 program. Is it possible to have it?

    thanks



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    Default Re: CNC egg shell carving

    Sorry Tonino, not prepare to open source at the moment.



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    Default Re: CNC egg shell carving

    Lithophanes again

    CNC egg shell carving-p70310-221321-jpg

    CNC egg shell carving-p70310-221408-jpg



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    Default Re: CNC egg shell carving

    UVVVVW,

    Until I saw your Re: CNC egg shell carving thread, I thought that I was the only one to have built a CNC machine to carve egg shells! Nice to know that I am not alone. I took on the project as a challenge. I didn't really want to carve egg shells, but I did want to build a machine that would.

    I have moved through several design changes over the years. My current machine has 4 axis. Two linear and two rotary. One of the rotary axis is dedicated to keeping the axis of the cutting tool Normal to the surface of the egg. I chose to design the machine with the cutting tool fixed. I thought that would give me more flexability with the tools I could use.

    I attach a spindle for mounting only to the bottom of the egg so that carving can continue to the top.

    Like yours, I use the machine to probe the surface of the mounted egg to get a profile but since (so far) I cut through the shell, I do not require that a point cloud be built. I make one probe pass from the top of the egg to near the bottom and assume symmetry.

    Currently I use a dental air turbine for the carving tool (much like artist that carve by hand) but I find them to be to delicate for hours of constant use. I would be interested in what you have found to be reliable. Yours looks electric which is what I prefer.

    I use AutoCAD with some lisp routines, Vectric's Cut2D, Excel with some macro's for serious number crunching, and Mach3.

    Developing a point cloud to enable relief carving as you have done will be the last frontier for me. I worked on it for a short time but then moved on to something else. With goose egg shells being only 0.011 to 0.015 inches thick, there is not a lot of room for error in relief carving.

    I completed the current machine design several years ago and after an initial flurry of carving, have not done much with it since. I carved a few eggs for friends and family. One friend wanted several dozen for wedding party gifts. OMG! It is not as much fun when you are under the gun to meet a deadline. I gratefully declined.

    Riky Tiky Tavy



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    Default Re: CNC egg shell carving

    Hi RTT

    There is a way to keep it going. You go commercial - but very high end. You need a polished wood box and with a shaped velvet lining and ...
    Do NOT try to hit the discount end of the market.

    Cheers
    Roger



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    Default Re: CNC egg shell carving

    Quote Originally Posted by Riky Tiky Tavy View Post
    UVVVVW,

    Until I saw your Re: CNC egg shell carving thread, I thought that I was the only one to have built a CNC machine to carve egg shells! Nice to know that I am not alone. I took on the project as a challenge. I didn't really want to carve egg shells, but I did want to build a machine that would.

    I have moved through several design changes over the years. My current machine has 4 axis. Two linear and two rotary. One of the rotary axis is dedicated to keeping the axis of the cutting tool Normal to the surface of the egg. I chose to design the machine with the cutting tool fixed. I thought that would give me more flexability with the tools I could use.

    I attach a spindle for mounting only to the bottom of the egg so that carving can continue to the top.

    Like yours, I use the machine to probe the surface of the mounted egg to get a profile but since (so far) I cut through the shell, I do not require that a point cloud be built. I make one probe pass from the top of the egg to near the bottom and assume symmetry.

    Currently I use a dental air turbine for the carving tool (much like artist that carve by hand) but I find them to be to delicate for hours of constant use. I would be interested in what you have found to be reliable. Yours looks electric which is what I prefer.

    I use AutoCAD with some lisp routines, Vectric's Cut2D, Excel with some macro's for serious number crunching, and Mach3.

    Developing a point cloud to enable relief carving as you have done will be the last frontier for me. I worked on it for a short time but then moved on to something else. With goose egg shells being only 0.011 to 0.015 inches thick, there is not a lot of room for error in relief carving.

    I completed the current machine design several years ago and after an initial flurry of carving, have not done much with it since. I carved a few eggs for friends and family. One friend wanted several dozen for wedding party gifts. OMG! It is not as much fun when you are under the gun to meet a deadline. I gratefully declined.

    Riky Tiky Tavy

    Hi Riky,
    I am glad that I'm not alone also
    Mine is a simple 3 axis machine.
    Dental air turbine is good.
    I saw quite some people use it to carve egg shell by hand.
    But I don't want to use it, as it is quite noise.
    And air compressor is required.
    I am using a blushless DC spindle for the carving.
    70K rpm, not as high speed as the dental air turbine.
    But much more silent.
    Of course, cannot cut the egg shell as fast as the dental one.
    I use Inkscape and Photoshop for the graphic design.
    And use the Inscape laser plug in and Artcam for the Gcode generation.
    I wrote my own program for the post processing.
    I have not much pressure. Just some gifts for friends.
    BTW, people like the lithophanes



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    Default Re: CNC egg shell carving

    Hi UVVVVW,

    Your CNC lithophanes have given me a renewed interest in carving. I believe I will dust off my machine and start experimenting again.

    I have ordered a more durable (I hope) dental turbine with ceramic bearings. I have a new idea on mounting/holding the turbine that I believe will make the turbine more reliable. Noise is not a problem because the carving is done in an enclosure.

    I have done a poor job of documenting my processes form start to finish and if I'm away for several months to a year, I have to retrain myself.

    Riky



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