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spindle turning with template

I mostly do faceplate turning, and have been asked to do some spingle turning. This is for a science fair project my department is doing on speech, and I'll be turning spindles with iregular shapes to help model vocal tracts (we'll use them as a form to cast clay or plaster hollows from, then play air through them).

I have a printout of the shapes (based on measurements of human vocal tracts during vowel production), and am planning to transfer them to templates I can use to check the turnings against. I've never done this before.

Any tips?

Any websites with walkthroughs of using templates with complex curves (i.e. marking out the blank, etc/)?

Thanks,

Andy Barss

Reply to
Andrew Barss
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Why not use the lost-wax method?

Reply to
sbnjhfty

For one-offs like this, pick a few diameters based on observation of the shape of the template, size those, mount the template behind the work, or stop frequently to check against it (or both) and shape the in-between parts to match. If you were making 100 of them, there are tricks for that, but IMHO they are not worth the time if making one.

If you mount a reverse template above/behind the work in such a way that you can move your eye to bring the two into line, it can make checking a bit simpler.

Reply to
Ecnerwal

: Why not use the lost-wax method?

Because it would require buying an carving a large amount of wax? Or did you have something else in mind?

?? Andy Barss

Reply to
Andrew Barss

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