How does the coffin engraving machine engrave the curvature?

   When the projected surface is flat, the projection engraving and the engraving engraving are not much different. However, when the projected surface is steep, the projection engraving will cause severe distortion of the path at the steep surface. The engraving of the package does not, it is like putting the path on a rubber film, and then rolling the rubber film on the wrapped surface. If the surface cannot be expanded, the wrapping path will also be distorted. Path distortion can be reduced by adjusting the center of the package and the direction of the package. Therefore, the arc carving of the coffin engraving machine can not be replaced by ordinary woodworking engraving machines.

   The coffin engraving machine can be machined on the plane and can be engraved on the same surface. Generally, wood carvings are often embossed on a curved board. The engraving of the coffin engraving machine on the curved surface is called projection engraving.

The engraving method of the coffin engraving machine is to project the path onto the curved surface according to the vertical direction of the processing surface, mainly for lettering or scribing on the curved surface, or engraving some patterns. It is not the same as engraving, which projects the path onto the surface according to the principle of length invariance.