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RE: How Do I Build A Drive?

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Posted by Robert May on March 18, 2000 21:29:00 UTC

Without metal working abilities, there isn`t all that much choice for such a small scope. Look at the German Equatorial design and you can figure out how to do the shafts with plumbing pipe and bearings of the right size (you can always shrink a hole in a bearing but you can`t make it bigger). The RA drive is a little more difficult as you need to have gears of particular sizes although you can use cogged belts if you keep them tight. The motor can be a syncronous motor or if you use a speed controller you can use other motors although the quality of tracking will be a lot worse. Getting catalogs from places like Science and Surplus, Herbach and Rademan and others will provide all kinds of parts that will help you with motors and things.
The drive will be turning over at 1rev/day so you don`t really need much power to drive the telescope. The 3W timing motor will provide enough power if the bearings are decently good.

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