Re: [CAD_CAM_EDM_DRO] internal contouring with cnc

Hi Caerbr;

Excuse me for not knowing much about flutes, but I have some configuration
questions. The last time, (some years ago), that I saw a drawing of flute
internals, the chambers were made with thin half circle pieces glued in at the
proper places, and the half circle not so blocked off, allowed air and sound
vibrations access to the entire length. Is what you're doing something similar,
or something different?

One possibility that comes to mind would be to use the kind of old, primitive,
predecessor to a horizontal mill I've heard called a shaper. Find out the exact
size chambers you want, make a rotating cutter blade to suit, jam the wood up
against it to make one half of the flute, do it again for the other, glue them
together, and you have your internal chambers. All that's left would be to spin
it up in a lathe for the external shape/size, and drill the holes.

Bill

On Fri Aug 9 16:48:27 2002, caerbr, <somersgarry@...> wrote:

> Hello - I am an amateur flutemaker, working in wood and delrin(a
>polymer), and I have been wondering about the possibilities which a
>CNC lathe might offer for creating the bore of the instruments. The
>bore profile of wooden flutes is rarely a simple cylinder, and varies
>from flute to flute, and is one of the most time consuming parts of
>the whole job. Small changes in bore profile also have a crucial
>effect on the qualities of a flute. The traditional method of making
>a flute is to take a wooden blank of the correct size, drill a pilot
>hole and then use a specially constructed reamer in the lathe to get
>the final internal profile of the bore. Problem is - you have to make
>a new reamer every time you want to modify the bore profile - which
>makes prototyping a very slow business. So I have been wondering if
>there is some technique available(not too expensive!) using a CNC
>setup and a controlled adjustable boring tool which I could program
>to cut a given bore profile, which I could then easily when I wanted.
>This would eliminate the time and effort involved in making new
>reamers every time I want to experiment with a new bore contour. So
>there it is - any help or suggestions would be much appreciated.
>Thanks in advance.
>gerry

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