Hey cajunpen,
To answer your question, raster is carving (usually with the 1/16" bit)
in a back and forth motion across the width of the board. ( like a printer)
Centerline, is cutting on the line usually at different depths and most of the time making it looked handcarved.enjoy
On the heart shape cutout I imported a heart shaped line drawing from Print Artist. Only thing is ,cw uses an 1/8" solid carbide endmill, 1" cutting lenth witch I would think they would be pretty fragile cutting very deep.
If you don't have any other way to cut them , it will work . My personal 0pion is the feedrate is too fast for most hardwoods . I have drilled holes with it and it does work . I preferr to have it only cut 1/8" deep or so , for a line to follow and then cut it out with a scrollsaw. Later Daniel
1.187 Custom Woodworking for more than 40-years