We've been using NC machines since before CNC. In 1978 we rescued a Lagun NC mill from the local optical coating outfit. The motivation for its use was not to make more, but to make things more accurately. This machine made all the brass parts, fingerboards, and body routing. This was all before large companies like Fender or Gibson started to use this type of equipment.
For a few years, we used the punchtape. Later, my dad built a computer interface to replace the paper tape (which is rather delicate).
Now that machine, NanCy, is doing just the brass work. We've got a new machine, Woody, that is doing the fingerboard slotting and tapers, and the body routing. We also make fixtures and tools for other tasks around the shop.
We have an old
page on our website that has a couple of pictures of some of our machines.
We don't use the CNC for shaping bodies. Setup takes time, and there is no advantage in the quanties we make.
We also don't use it for neck shaping. This is done completely by hand, since hands will be touching it in its natural life.