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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

David, Looks like a common curve, nice overlapping data, Peak to Peak = 8.2, RMS = 2.8. Did you analyze, create a PEC curve and then upload to the mount when the pop-up prompted? This should be done

worms), is already is a blackish grey color when applied at the factory. Yep the MP-50 is what we use on the worms, and the arctic lube elsewhere

I have ignored what PHD2 says I have for backlash completely, as I believe it is more likely stiction and my guiding is rather good.. Also note that since the mount "works" perfectly for what I want

The JetLube MP-50, a molybdenum grease (used at the factory on the worms), is already is a blackish grey color when originally applied. SuperLube which many are using for their relubes, is clearish or

I've got a couple dead Meade LT6/8 mounts and have been toying of reviving them with OnStep. So I picked up a drive and worm block assembly yesterday and broke it down. Thought I'd share the end play

Incredible result with fairly "humble" equipment. Not referring to the G11G, of course?

Any idea what causes the positive feedback?? I've been wondering if the sampling delay could cause positive feedback if the sampling interval (exposure time) is too short especially for DEC.

This is what I ended up doing: Set the RA axis position via bubble levels. To set the dec position: 1) Perform a sharpcap polar alignment 2) set the mount back to CWD position 2.5) restart the

The sharpcap results are fine, the problem is having to adjust the alt and az back and forth a lot every time at the beginning and end of polar alignment.

Hello folks, Despite using the latest 2018 Beta firmware and the ASCOM SP1 drivers, I still had the problem where issuing a goto under Stellarium causes the mount to run off in some random direction,

I got a new one recently and have been testing it with a 12" F4 solid tube newtonian, approx 50 lbs. The weather has been spotty clouds, so no real testing, but initial impressions are positive. From