Re: OnStep for Losmandy GM8


George Cushing
 

As can be seen from the calculator direct drive falls within the acceptable resolution range for AP. 



The demands of visual use are quite a bit less. The Vixen GP with the Sky Sensor and 120:1 GR-1 reduction tracked at 2304 steps/deg. and produced noticeable jumps in tracking at higher magnifications. The Vixen SP using 300:1 GR1 reduction tracked at 5760 steps per/deg. and had no such issues.

Not to say adding GR1 reduction won't improve things even 2:1 increases tracking resolution 200% (0.58). It up to the user to decide whether the improvement is worth the effort.


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