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How to mount encoders

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#1 cmcdaniel5

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Posted 03 March 2013 - 01:06 PM

I'm in the planning stages of building a dob structure for my 16" Swayze mirror. I’m thinking of going ultra light along the lines of the Obsession UC or Albert Highe's design. I want to have the ability to add digital setting circles but for the life of me can't see how the alt axis is going to work (Az is a no brainer). Anyone out there got a picture of how it’s done? :question:

#2 Dennis Steele

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Posted 03 March 2013 - 01:56 PM

Check out my website at dobstuff.com and look at the scopes and testimonials page. You'll note the alt bearings are made with a "center hole" -- this is where the encoders would be attached. I like to use the Sky Commander encoder installation kit for the pivots -- but there are other solutions as well. Dennis

#3 Achernar

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Posted 03 March 2013 - 04:59 PM

If the altitide bearings don't have a place where you can mount the encoder at the center of rotation, you can make a bracket, or have someone at a machine or welding shop make one for you.

Taras

#4 Dennis Steele

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Posted 03 March 2013 - 08:37 PM

Sure, anything that'll put the encoder into the center of the alt bearing "circle" will work fine.

Dennis

#5 cmcdaniel5

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Posted 05 March 2013 - 12:41 PM

Thank you all for your responses. I see now that with an ultra light design one needs to have a bracket that extends from the rocker base to the where the center of the alt axis would be. This becomes the “virtual” location to place the alt encoder.

McD

#6 Tom and Beth

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Posted 05 March 2013 - 03:19 PM

Or you can skip that part and use this

Works great on my 12.5 inch version.

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#7 cmcdaniel5

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Posted 05 March 2013 - 09:45 PM

Very cool. I've seen some folk use an iPad taped onto the OTA. Probably same mechanics in play.






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