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Gemini Firmware Information Version: 5.22 Build date: Aug 16 2018 Build time: 19:20:16 ROM size: 363400 RAM size: 960 Hand Controller Firmware Information V1.20, Mar 12 2017, 09:30:01 What I mean was

Alan, I could only think of how to attach a laser to an axis. I cannot think of how you'd do it on a worm. So ... Can you say something about what size laser you attached, and how you attached this

It was JKmetz who recently reported this in this thread: " And the newer gearboxes you can dissemble to clean and lube, or check from wear. My originals were riveted and could only be drilled out. Now

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Just as a clarification, the laser pointer trick only works when clamped to the worm or anything before it in the drivetrain.? If you clamp it to the actual axis saddle, that moves too slow to

Michael, I don’t know what those Allen bolt assembled gearboxes are; you must have heard about them from someone else. Eric

Alan, You may want to doublecheck that you actually uploaded the firmware. If you are in the Gemini Web Server, go to the page where the firmware file is indicated and see if it is the

Can you upload the PHD2 guide log?? If your pixel scale is correct (0.8"/pixel) and this is unguided, it sure looks promising but we could tell you more with the guide log. Keith

Can't figure out how to increase the resolution of the picture, here's a link also...

In my guiding graph, DEC looks nice and smooth, but my RA is all over the place... Is this normal for a recent stock G11G? (I think I finally got a decent PA last night ;)

Hi Eric, I liked your visual approach. Alan has told us of his innovative approach too using a laser pointer attached to an axis. You can then readily see how long it takes to take up the time lag

Thanks for the reminder.? I only saw the first video but not the second one.? I'm sure there's lots of good tips.

Michael, I replaced the gearbox on the RA axis when I first got the mount in 2013 with a McLennan gearbox, but if I remember correctly it has more backlash then the Losmandy one, so I still use the

We recommend adjusting in one direction, I'm sure you know what to do but we also covered this and other best practices for polar align in this video https://www.youtube.com/watch?v=KjdCa7aSaPQ --

Yes, but it's all speculative, so no comment.? There is no such thing as "too short exposure time" in a properly set up feedback algorithm.

For the DIY minded I would mention that OnStep requires no gearbox - the stepper is coupled directly to the worm axis.? Mode-switching stepper drivers slew the mount in slewing mode and track in

No, I am just using the grease color for identification, since I am a big proponent of not mixing greases.? Here's the grease colors that my mount came with: transfer gears and under the worm b

Eric ("cyclone")... Very nice work! I love that 2 image timed video photo of the Oldham coupler end! That you show is typical of the stock gearbox play. That's part #1 of hysteresis and you can't get

As briefly described in my previous post, I measured the backlash directly by taking pictures of the coupling. To be more specific: -Remove the motor-gearbox assembly from the mount. Keeping half the

Since I identify with everything you write below, I would suggest you just try to move the mount by hand to see how much play when you A) wiggle the end of the counterweight shaft and B) at the camera