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Losmandy/Celestron Digital Drive

Started by Bob Chester, 02/23/2004 12:02AM
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Posted 02/23/2004 12:02AM Opening Post
Bob Chester
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Join Date: Feb 2002

Location: Seattle WA, US

Posts: 185

Hello all,
Can anyone tell me at what rpm the RA motor turns while tracking with the Losmandy drive system or the Celestron 492 drive? I'm thinking of replacing my 1/2 rpm Hurst AC motors with a DC stepper system and hope the Losmandy drive would be a simple solution.
Bob
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Fujinon 10x70 FMT-SX binocs
Tak FS-78 ƒ/8.1 - 630mm fl.
6" ƒ/6.5 homeground newt. - 981mm fl.
10" ƒ/4.85 homeground dob. - 1231mm fl.



Posted 02/23/2004 01:15AM #1
Walter Hamler
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Join Date: May 2001

Location: Winter Springs FL, US

Posts: 527

I'm not sure which mount you are referring to but I recently modified my TAL-2 mount with a Celestron CI-700 stepper drive system. The worm shaft required a 1 rev per 8 minutes for the 180 tooth worm wheel. As it turned out the stepper motor's nominal speed is 1 rev in 8 minutes, requiring a 1:1 gear ratio between the motor and the worm shaft.

Walt

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