Re: Adding OnStep to a Cave Model A mount

Howard Dutton

On Sun, May 2, 2021 at 05:47 PM, rpasken wrote:
I can replace the 10-tooth/144 tooth pair with a belt drive
1440:1 overall reduction should be enough to move around a fairly stubborn mount with NEMA17 motors.

Does the RA motor get good and warm when tracking is on for say an hour?  Generally speaking a fully powered hybrid motor like this gets "warm" enough you don't want to grasp and hold it for an extended period.  Not saying you want to operate it at those power levels but it sets a benchmark to judge by lacking specifics.  Another way is to look at Oriental Motors website (wide selection and easy to view detailed specs) and find a motor of similar frame size and body length and coil resistance.

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