Encoder suggestions

Hello,

I have a new atm dob with 40" diameter oversized altitude bearings--something like the new 18" Obsession's altitude bearings but larger. Eventually I would like to mount optical encoders. No real center to mount to and direct rolling off the altitude bearing results in a great many turns of the encoder for even small real altitude movement. Any ideas?

Thanks,
Daniel

Hi Daniel,

I had a similar issue with an ATM 10". This is the solution we came up with for mounting the altitude encoder. The pivot center ended up being up quite a ways! Is this what you are talking about?

(Apologies for the pixelated photo - I reduced it considerably for posting purposes!)

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