8" GSO RC with CSL Moonlite FocuserTelevue TV60isLosmandy G11 with Gemini 2 (with Ovision upgrade)
SBIG STT-8300m with Self Guiding filter wheel
A wide assortment of lenses for my Canon.
Docent at the Rose Center for Earth and Space at the American Museum of Natural History
Deep Space Products
One 'scope at a time... "Onward! Ever forward, never straight!" - T. McMahon
Quote:Ed,I agree with you on the risks, but the way I saw it, the worm gear wasn't performing anyway and a replacement is $65 only. What's the worst that can happen?
George You know you're getting on when the equipment you farmed with is showing up as suburban lawn ornaments.
Quote:Lapping the worm to the wheel is less risky and can be done with polishing compound.
G11/Gemini-2/OPWB Canon 60D (unmodified) with 18/55mm kit lens and "nifty fifty" lens Assorted M42 screw mount lenses (28mm thru 300mm) Celestron 102GT refractor (Costco special) 8/10 inch astrograph someday. DeepSkyStacker 3.3.2 StarTools 1.3 http://www.astrobin.com/users/StarGale/ http://everettastro.org/
14.5" Starmaster with ServoCat and Argo Navis 1966 Unitron 4" Model 152 EQ Tec 140 TV NP101 f/5.4 APO Telvue .8 Focal Reducer FLI ML8300 and CFW-2-7 filter wheel Astrodon Gen2 RGBL 2" filters Baader 2" Narrow Band Filters Borg 50mm Guide Scope/ATIK Titan Guide Camera AstroPhysics AP900 Losmandy GM-8 Gemini
Quote:I've polished mine using a Dremel polishing pad and some mild chrome polish. I did that to get rid of some burs in the worm gear. I haven't had the chance to test the result at the scope because both my RA & Dec motors have burnt out and I am waiting for Scott Losmandy to send me replacements (which he agreed to do for free).
I did read on the internet about a guy who had similar tracking issues to what I had and when he polished his worm gear, all the issues went away! Here is the link to his write up http://www.helixgate.net/raworm.html
I hope this information helps
Edit: By feeling the worm by finger as I rotate, the sharpest of the bits that where sticking out have definitely been smoothed out. But I used the mildest polish I could get my hands on.
SVR90 Raptor QHY9C OSC Camera ZEQ25 EQ Mount Porta II Alt-Az
Quote:Also I just installed the OPW-G11 without the worm wasn't in stock.
Quote:The worm is driven at a slew speed while engaged with the wheel and a polishing compound is applied. The lash should be set before doing this. Then when the parts are lapped in you would completely clean them and grease them and set the lash again.Not recommended if you do not know for sure you can do this sucessfully. Blueman
Living at a dark site, I make scope when I have the inclination. I also do woodworking, cycling and other outdoor activities
Quote:Gale, my Aeroquest worm is only +/- 8"But it's only $100.The only higher-precision worm that I know of for the G11 is the Ovision worm. That one is I believe +/- 3" but it costs $500-ish.
HyperTuned CGEM and G11wG2 SV115T20, Meade SN-8, AT-66, and modified 20d. Nebulosity, SkyTools3, TSX, and Pixinsight.
Quote:Hi, What kind of PE should be expected from a brand new G11 with Gemini 2 out of the box. From what I have read in several places about 5 arcseconds peak to peak. Can anyone verify this. I know how to lap valves on a car when doing a valve job, but how do you lap a worm.neilson
Mach1GTO / G11/G2 (stock) / AT6RC / AT10RC / TMB92SS / Astrodon 50D / STT-8300M / FW8G-STT / PixInsight / etc, etc. Astrobin - Flickr