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harder to correct. PHD's auto backlash compensation does that for you, which is why you want to use that approach -- Brian Brian Valente portfolio brianvalentephotography.com

I always assumed DEC backlash was somewhat consistent.? This make it harder to correct. ------------------------ Jim W Phoenix, AZ. USA

You can - sort of you can measure it by summing the pulse guides until it reverses direction But it won't be consistent for comparison or understanding over time. Backlash changes through the night

Can you determine backlash from the logs or do you need to run Guiding Assistant? ------------------------ Jim W Phoenix, AZ. USA

PS funny you asked this, i was literally processing an image with WBPP just now This is a couple hours on eta carinae nebula, just WBPP and some curves. so even the basic processing works pretty well.

Hi Scott My suggestion is starting with WBPP (weighting batch preprocessing script) which can get you from data to an RGB image in the fastest way possible while still learning an approach that will

I am taking the plunge into learning Pixinsight.? ?Anyone have any recommendations for good tutorials on YouTube?

Tom, I also have a 102mm scope with a 0.7X focal reducer (500mm FL) and I always use PHD2 to optimize guiding. The FL of your main scope times 0.2-0.25 is about where the focal length of your guide

Thanks John! That was generally what I thought but I was wondering if there was a focal length above which guiding became a necessity. I enjoy the educational value of this thread. I plan to keep

FWIW..... I find that my GM811 DEC backlash as reported by PHD2 varies between something less than 200mS and about 1800mS depending on where I am pointing and possibly other unknown variables. Typical

Well in my case the more you tighten the clutch, the tighter the worm mesh gets.? So either the ring gear gets pulled down a little with a tighter clutch, or at low clutch pressure, the upper bearing

It's the preload from the regular screw (with spring) that keeps the worm from riding up. I tried putting an o-ring underneath the allen head for the block bolts, but it didn't make a difference.

Tom, Most people use PHD2 or another app for correcting their guiding unless they are very happy with the tracking of their mount. Super steady tr

it??? haha no. not anymore! it's a slightly different approach than before. Before I think people were trying to eliminate backlash, and it was not a good approach you can try TVC 10. if it's working

Won't the Losmandy / PHD2 Anti-TVC Gods come down and zap me for using it???? Sure; I am willing to try.? I need to order some but I want to try using?NyoGel 774 Damping Grease on some of the DEC

Henk, et al, Just a quick overview... The thread here has focussed attention on the newest version GM811 units with tucked motors and spring loaded worms. The major problem reported by many is a high

HI Jim nice to see you here :) can you upload a guidelog to see how it's going? one additional thing you might try is increasing the TVC. you might try a value of 10 and see how that goes. we used to

I need to read through this entire post but for me a lot of my GM811G DEC backlash was caused by one of the screw holes on my DEC gear box being stripped.? The motor would rock back and forth when

Mike et al, This is a very interesting discussion and I am following every comment. But as a noob I often have more questions than answers! The one question thats nags me thru these guiding and

I have found through trial and error, that erring on the side of loose worm adjustment gets the best performance. I also found that the best performance happens where ease of movement of the motor