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    Default dome power options



    I'm building a dome for my scope. Anyone have any insights into how to power the dome itself, rotation. I have some ideas but would love to hear others approach rather than reinvent the wheel. Current plan is to run dome on platen/shelf augmented by bearings to ease the action. Power can be applied by a continuous cable around the outside run through a yacht style windlass. Making the assumption here that the friction alone of the cable against the exterior surface will be sufficient to turn the dome. Have also considered a bicycle type chain driven by a geared headed motor. Haven't been able to visualize a decent way to affix the chain. Maybe at link points just as you would built a chain. Help!

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    Default Re: dome power options

    My Exploradome is driven by a sprocket that engages with a ring gear around the perimeter of the dome. The ring gear is made of thick plastic drilled with holes that match the teeth of the sprocket on the motor.

    The shutter is powered only in the home position, where a pair of contacts supply power with positive polarity to open and negative polarity to close.

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    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on
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    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
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    (pier);
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    .

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