Celestron C14 Starbright/Fastar Sky-Watcher 180 Mak AT72ED RED COLOR Losmandy G-11 + DSC
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Quote:Since you already have the the OTA apart, please check if the primary mirror locking collar is secure.On my C11, the mirror lockring was loose, allowing the primary to flop about as you tracked and slewed the scope. It's impossible to keep focused/aligned/collimated with a loose primary mirror.
I'm interested in the parts you mention, would you please send me the details.
Quote: It was loose!
Quote: Quote: It was loose! Well you'd want to tighten that up, but not too much as to pinch the mirror.I've found that there is some lateral play with the lockring. Try to move the ring from side to side. Chances are, it'll loosen up and you'll have to snug it down again. Rinse repeat.
Quote: It was loose!
I know that this tread is over a year old but, does anyone have more information on a modification which will add corrector plate adjustment screws?
I know of none, the only thing that should be collimated are the 3 collimation screws that are in a tri-angle shape on the 2ndary housing, you can get Bobs Knobs for these, if your having or think your having to do that, then send it back, if you think your having to shim the corrector, DO NOT do this, lifting the corrector in one spot or more, and then putting back the retaining ring will almost certainly result in a cracked corrector. if they don't let you send it back, because its out of warranty insist that they take it back, I don't know how to go about this or even if its possible, but somebody will be getting a new exit wound, try hard.
edit: I see now what you are talking about, as I did not read the entire thread, the way your post was worded made me think you are trying to adjust the tilt of the corrector by shimming one side of it, sorry for the confusion.
Keeper of the Swamp Gas Observatory "This R2 unit has a bad motivator" AR127, CG4 CGE1100 1984 tasco 60mm 49TR F/13.3 refractor 1976 Vixen Polaris 80mm F/15 refractor Denkmeier Big Easy BV'er Astro-Tech Titan 38mm 70* Astro-Tech Titan 20mm 70* Astro-Tech SR6 12mm 60* Meade MA25mm Jap. Meade MA9mm Jap. TMBpII 5mm ES 1.25" FX
All I did was drill three holes 120 degrees apart within the flange area, So the screws would bear on the corrector plate. I then tapped them and installed three delrin tipped spring loaded hex grub screws.
Carr Lane part nos
1 30SSPN2 6 4.81 09-JAN-2013 CL-30-SSPN-2 SPRING PLUNGER
Once you have adjusted the corrector to center and tightened down the ring that holds the corrector in place you can loosen off the adjusting screws if you wish.