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Nice analysis, Bob. The G11 ring gear used to be (sometimes during it's production) steel. It is not black anodized anywhere on its surface...here is a photo. Later and current production is black

Just a small detail - the clutch pads are not Teflon! They’d be useless for a clutch if they were. Not sure exactly what plastic they are but you can be sure they’re not Teflon. David Sent: 05

Alan137, The tilt of the worm wheel (it's not a ring gear) is another issue.? Certainly the worm wheel needs to be elevated above the plate upon which it resides.? There is a large radial bearing

No need to change the gearbox for either the Maxxon or HT motors. I’ll leave others to comment on whether it’s worth upgrading as I’m still using the “original” motors. David Sent: 05 August

Sorry yes ok to swap. Put a HT on each RA only Winning. -- Brendan

Bryn you don’t need to change the gearboxes. ?The newer motors just produce more torque at same current the older motors draw. ?Thus are more efficient ?and ?less axes stalls Might be nice to

Hi, I have recently picked up an old used G11 with Gemini 1 and the original smooth servo motors. I understand that to upgrade the motors I would also need to upgrade the gearboxes. Is this correct?

Nice work, John. I can confirm your notes and add a few more insights, as I also took apart two different G11s today. One is a very recent G11 production, belonging to Vishal who lives near me. It has

John, Your points well taken. It's probably too big a step to make that recommendation unless there's evidence that there is eccentricity in gear. As you point out, there can be a lot of variation in

Please see pics from my RA rebuild done in November 2020, after about 3 years use. The RA shaft has the scoring Peter has mentioned, heavier on one side than the other. Also note RA assembly with RA

Just came across this new video posted to YouTube: https://www.youtube.com/watch?v=qujs7Kt_6_c&t=1543s The author shows how to completely tear down, clean and upgrade the SkyWatcher mount, for those

The bottom one would be from before June 1998 when the 323 area code was created. BTW, if you wanted a G-11 for Christmas in 1998, it was $3400, with a tripod and digital drive controller; no Gemini

The issue of "indexing" is a red herring, especially for these newer mounts. I have scales on both my axes, so I always know the absolute position. I think the current ring gear is hard anodized

Tapered roller bearings don't constrain the ring gear mechanism in tilt, which is important for worm mesh alignment. I think needle roller thrust bearing is the right one to use because it is the

Michael Ben-Yahuda, Respectfully, I now believe your assertions that we only use 50% of RA ring gear is not correct. This would only be the case if we never ever loosened the clutch to change the

I am not sure why they used needle bearings in the RA and DEC axes.? Tapered roller bears are really the bearing of choice in this application.? The taper roller bearings combine the function of the

Peter, That's the right side journal that moves to adjust the backlash. I thought it was funny that it wouldn't be anodized but the cut is definitely not right. I purchased the OPW as a standalone. I

Jim, That's not right. It looks all chewed up. They are smooth and black on the bottom. The left hand one has no movement in it's hole. The right hand one can move a little in it's hole. They ought to

Brian, Here's the logs from the other night. Last night something happened with my NINA sequence and it's all screwed up. There's also a picture of one of the bearing blocks that came with the OPW

Keith, Thanks for this input. You could be entirely right about the 80s error. I too have speculated about this and the McLennan gearboxes. Although its pretty constant in magnitude between the 25:1