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CG-5 Polar Scope Install - Stumped

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#1 SkipW

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Posted 16 August 2013 - 10:34 PM

OK, I'm stumped. What do you have to take off a stock ASGT mount to thread the #94224 polar scope in?

Here's where I started?:

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#2 SkipW

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Posted 16 August 2013 - 10:37 PM

Then remove the old-style centering screws and loosen setscrews in locking ring.

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#3 SkipW

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Posted 16 August 2013 - 10:38 PM

Unthread the locking ring and 12-h circle (what's this used for, anyhow?)

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#4 SkipW

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Posted 16 August 2013 - 10:40 PM

Loosen the thumbscrew and remove the RA circle.

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#5 SkipW

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Posted 16 August 2013 - 10:45 PM

Now what? The rear piece is apparently an older design and too small for the current polar scope, but I can't coerce it out without a lot of force.

The exposed threads are wrong, too. I presume the threads inside the collar match the exposed threads on the polar scope. Are they? What next?

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#6 BRCoz

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Posted 16 August 2013 - 10:45 PM

Unscrew the part that had the three thumbscrews and screw the polar scope in.

#7 SkipW

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Posted 16 August 2013 - 10:50 PM

Here's the polar scope I have. I presume the marked section fits inside the collar marked in the previous post. If so, am I missing a setscrew that holds the old tail section in place? If not, how hard should it be to remove it, or am I barking up the wrong tree?

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#8 SkipW

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Posted 16 August 2013 - 10:51 PM

BRCoz - I tried, but it wouldn't budge. How hard should it be?

#9 BRCoz

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Posted 16 August 2013 - 11:00 PM

I don't remember. I put one in about 5 years ago. I just went and took my polar scope off and it looks like the collar came off before I put the polar scope in. It was all silver no black metal. There may be another setscrew hiding.

#10 rmollise

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Posted 17 August 2013 - 07:48 AM

I haven't messed with one of these in years...I've never found the need for a polar scope what with AllStar and the previous Polaris align software. But if I recall, what you have to do is unscrew the collar the centering screws go it.

#11 Cliff Hipsher

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Posted 17 August 2013 - 08:51 AM

Then remove the old-style centering screws and loosen setscrews in locking ring.


STOP RIGHT HERE!!! At this point you should be able to remove the collar that had the thumb screws.

Now get the Polar scope and loosen the set screws. The tube should come out.

Insert the Optical tube into the mount. and tighten the set screws just enough to hold the scope. Now you get to boresight the scope to the RA axis....

#12 SkipW

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Posted 17 August 2013 - 11:56 AM

Thanks for the hints, guys. Some gentle "persuasion" with a strap wrench did the trick. I wanted to avoid using that that to avoid forcing something that wasn't gonna go, but the consensus was that it should just unscrew, and there were no setscrews. The wrench gives enough grip without ruining anything and leverage so it could be turned with more authority than I was willing to try before. It was snugged up pretty well but removed quite easily once started. It turns out that the "collar" and endpiece annotated in the earlier picture are actually one piece.

Uncle Rod - yes, I use and like ASPA, too, but I like to try new things. When one came available used, I figured I'd give it a try.

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#13 SkipW

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Posted 17 August 2013 - 11:58 AM

The threads inside the axis mate with the polar scope. Replace the RA circle and thread the polar scope in. Done.

Now to get it centered and wait for dark.

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