On Thu, 18 Jan 2001, Tyler Samson wrote:
> I am planning to publish a book on building a wooden
> 8X10 from cheap, readily available materials (walnut,
> brass and toothed belts from thrift store printers
> that no longer work)
How do you plan to use the toothed belts? The Layton camera a-la View
Camera Magazine design uses a piece of small chain and matching sprockets,
kind of like a miniature bicycle chain. He cuts this chain into two
pieces, lays it in a groove in the focusing bed and mounts the sprockets
on a shaft underneath that.
I don't recommend this method! Yes it sort of works, but these gears are
not designed to work with the chain rolled out flat. The pitch seems to
be too shallow, and if there is any resistance on the focusing mechanism
the teeth skip out of the chain holes. If this is your approach I'd be
a bit leary about this problem cropping up for you. I'm not trying to
discourage you, but thought you should know about this.
I don't think that a piece of rack stock with matching gears is that
expensive, and would probably be more satisfactory. I've also been
wondering about using threaded rods with nuts. You could put the focus
knob in the back right under the ground glass for instance. How about
cables and pulleys like they used to use in the old mechanical radio
tuning dials, etc.?
In any case, we'd all like to hear how your method works. Keep us posted!
- Wayde
([EMAIL PROTECTED])
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