This is a CNC egg shell hollow out engraving procedure.
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Step 1: Prepare a Pic
Get a image from the net or create your own image.
Step 2: Compress the Height of the Pic to About 77% of Original
The aim is to compensate the image distortion from flat surface to curve surface.
Step 3: Sort Out the Sharp Corners From the Image
As egg shell is very brittle, need to cut away the sharp corners at the beginning.
Step 4: Sort Out the Protruded Portions of the Image
Protruded portions will be broken easily. Need also to route the profile of the protruded portions at the beginning.
Step 5: Construct Some Straight Lines
The aim is to break the cut away egg shell portions into small pieces.
Step 6: Prepare He Final Profile of the Image
Prepare he final profile of the image as for final profile cutting.
Step 7: Prepare the G-code
Prepare the G-codes from each image. Use Inkscape, ArtCam or else.
And merge the G-codes into a single G-code file.
Step 8: Egg Shell Engraving
Do the egg shell engraving by a CNC egg shell engraving machine.
Step 9: Cleaning
Clean the egg shell by bleaching solution.