rld@druxy.UUCP (12/10/83)
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 **