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From: rld@druxy.UUCP
Newsgroups: net.astro
Subject: Questions on Best Telescope Drive
Message-ID: <881@druxy.UUCP>
Date: Fri, 9-Dec-83 16:06:04 EST
Article-I.D.: druxy.881
Posted: Fri Dec  9 16:06:04 1983
Date-Received: Sun, 11-Dec-83 01:33:40 EST
Organization: AT&T Information Systems Laboratories, Denver
Lines: 43

I have several questions that hopefully someone on this
net may be able to answer.

Given: 
	The following drive is for a 10" f8 Newtonian type
	reflecting telescope.

	One Equatorial (German type) Drive
		-  screw drives worm gear of 91 teeth
		-  91 toothed worm gear drives second screw
		-  second screw drive worm gear of 247 teeth
		-  247 toothed gear drives Polar Axis (PA)
		-  All worm gears advance ONE tooth per revolution
		   of the driving screw
		-  Overall gearing of above is 22,477 revolutions
		   of 1st screw to 1 of PA

Requested:
	What is the suggested drive for 1st screw that will allow
	accurate tracking for visual and relatively short exposure
	photographic operation?

	Would a constant speed motor geared to the appropriate
	revolutions be obtainable and if so, from where, or would
	a variable speed motor be a better choice?

	Are there any good interfaces to inexpensive computers or
	other automated tracking systems that would permit entering
	of a set of coordinates to cause the telescope to track
	that section of the sky?

Response:
	taken in any form I can get.
		US Mail			R. L. Ducharme
					9340 W 82nd Ave
					Arvada, CO 80005

		Mail			druxy!rld


				Thanks in Advance

				** Robert Ducharme **