Re: ATM 3/4" plywood for dob.?

["Paul Stock" <comabereni@earthlink.net>]

I like to use a couple wood screws per corner joint myself, predrilling the
holes with a countersink and filling them with hardwood plugs. If I find the
pieces get off a bit, it's never more than what a couple swipes with a
handplane or a trim bit in the router can't take care of. For an experiment,
I tried pulling glued-only Appleply pieces apart and found that the top
lamination or two pulls away without a whole lot of exertion as the joint
fails (only as deep as the glue can penetrate). Sure, you wouldn't be
subjecting your telescope to those kinds of stresses on purpose, but if I
can make my scope more crush-proof with a couple wood screws, then why not?

Paul Stock
http://home.earthlink.net/~comabereni


> Date: Wed, 18 Apr 2001 18:44:04 +0200
> From: "Jan van Gastel" <jhm.vangastel@wanadoo.nl>
> Subject: Re: ATM 3/4" plywood for dob.?
>
> I used to use screws for that purpose in the past, but, when turning a
screw
> in the wood the wood sometimes went out of place a millimeter or a bit
more
> or less. To keep the wooden sides of my rockerbox and mirrorbox at their
> right place, I used small nails, following Kriege/Berry's advice. I pulled
> the nails out after the glue cured.
>
> Jan
> http://www.geocities.com/janvangastel/