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Hi Folks, I'm new to the G11/Gemini, but not to astrophotography and I have used PemPro previously with great success. ? I'm using Brian's fabulous instructions here:

Thanks for the clarification. I really thought that the direction of the arrows you see in PHD2 indicated the turning direction of the RA drive. Best wishes, Daniel

That’s about right. There has to be som movement I remember this has been discussed lots before. ?3mm at the end of the shaft is a lot less at the gear -- Brendan

Backlash in Ra is not a thing! My focus would be on Dec. You need an FFT on Ra to understand it's behaviour. Peter

Michael has it correct, you are likely seeing the effects of the spring-loaded worm. It's not a good idea to try to zero it out, that's not how the spring-loaded worms work Roland Christen from AP did

Because it's spring-loaded, you'll see a lot of wiggle if you push moderately hard, but that doesn't mean you have that much backlash during normal tracking.

Even with this backlash, how is your guiding ?? ?Backlash in RA is not a big thing as it tends to guide in one direction most of the time. Regards, Daniel

How much wiggle or movement should there be for the RA axis if the spring-loaded worm and secondary screw are adjusted correctly?? ?I measured the movement of the far end of the counterweight shaft

Danial, please post your PHD2 log file and I'll look at it for glues. Peter

The spikes I mention can be seen in this excerpt of a PHD2 log: As you can see the error is most of the time in a band of +-1", but there are occasional spikes. Even without the occasional spikes, I

Bob, This depends on the total age of the scope, not just idle time. Sitting for 3 years might make the lubes drip through a bit, especially with higher temps. So we know the mount is 3 years + at

PE spikes can be caused by stiction which may be visualized as force ramping upward with a sudden release as the level of force applied overcomes the resistance present. There are two possibilities

Vincent has been so kind to contact with me to report that unfortunately he was unable to solve the problem and sold the mount, moving to a CEM60. His mount used a Gemini 1, so either the problem is

Losmandy will do that for you, surely, but maybe they are too busy to do it promptly. Basic maintenance is well covered in their videos (cleaning and re-greasing). Worm adjusting is more intimidating

Did you get those spikes in RA too?? ?I'm considering too slightly loosen the far end bottom screw to try to improve my RA performance. Peak values in RA are over 2.5" and those concern me more than

That's exactly what Brian says. He only refers to the far end screw that it is beneath the big spring screw though. Unscrew a little and that should free the worm enough to float over the gear.?

Bob your the perfect person don’t discredit your skills, attention to detail and analytical skills. there are plenty of dissemblely guides ?on the net and attention to order of washers. ?Take

Bubbles are my thing right now and this beautiful and popular supernova remnant does not disappoint. Two light years across and 1500 lights years away in the constellation of Aquila, which is sadly

I don't know that good lubricants would deteriorate appreciably in 3 years.? Does the mount work?

hello Bob Hancey, I am a member of the Sac Valley astro soc. we have a G11 mount (older mount) I am in the start of a rehab project for this mount. My greatest concern is that lubricants on the