Enrico Schiaffella wrote:Thanks Freeman. So, if I correctly understand, I insert a raster image of a guitar shape that I am interested in. I trace the body outline using the tool spline. Save that as a def file. My only doubt is how accurate should I be in tracing the contour? Are there different levels of accuracy? I am afraid that the laser cutter will copy bumps in the plantilla. Is it reasonably easy to figure out if I did a good job in tracing the outline? Many thanks
There are a variety of ways to draw smooth curves with most drafting programs. One is to draw circles or arcs and connect them with line segments, another is to locate points on your curve and connect them with poly lines. The point is, you want a smooth continuous line with no wobbles or gaps. The laser cutter will have its own software that drives the cutting head, very much like in the old cadd days when we used pen plotters (does that date me). Our laser software checked for problems with the imported file but it would assume that bumps were part of the design.
My company owned a Trumpf CO2 laser (no wise cracks, please) which was close to a million dollar machine. When we did outside work we simply took the customer's cadd drawing and imported it, I'm assuming your guy can do the same, but best to find out exactly what he needs.
You might want to contact some of the lutherie suppliers like StewMac who offers laser cut products and find out how they get them manufactured. Also, the other lutherie forum has a sub forum on cnc, you might ask there also. Laser cutting is just another form of cnc shaping.
http://luthiersforum.com/forum/viewforum.php?f=10106