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Hi Peter Real world results are what matters, so if a production mount guides best with a TVC value of 0, 5, 50, or 5,000, and we can replicate that and demonstrate it delivers the best results for

I'd advertised an older CG11 with the Gemini 2 upgrade on Cloudy Nights ( https://www.cloudynights.com/classifieds/item/260195-losmandy-g11-w-gemini-2-and-other-updates/ ) and despite lots of views,

Fantastic results David, congratulations, great images.? ?I will need to try PHD2 next time and see if that is better than Ekos where I got to about 0.6" total RMS last time.? This is with a 12"

Your screen shots have too large a scale on the guiding plots, so it's hard to make out anything. Based on the guide logs, you have too much backlash compensation

Peter, Phew! You have done some pretty interesting work here researching all the physical dimensions and tolerances, plus you obviously have an engineering or tech background. As far as HGM being able

David, Without even looking at your logs, it appears you are on the right path. For a scope of this focal length, this guiding should be more than good. Now you may be in the way of just tweaking PHD2

Sorry, forgot how great 1990s technology Email lists are so here is a link to the full size photos. https://www.flickr.com/photos/193487945@N07/albums/72157719570875227

Alan, Since I have had the G11G2 mount, I have experienced two types of runaways. The first was from a GoTo command being sent to the mount and the firmware not being able to decide (in RA) what side

Okay so I went out Saturday night with halfway decent seeing, no wind, transparency not great. Mount was adjusted according to videos. Was tweaking the little screw next to the spring screw, ended up

Allen, I wounder?if the difference in TVC values for ?2s ?backlash is due to your step size being 0.56 arc-sec, while mine is 0.17 arc-sec? Just a thought, Peter

?Allen which mount? What was the measured PHD2 backlash or what did you estimate it to be with TVC=0? Let's hope not else this really becomes an intractable problem for people. If your coupler is

I determined my TVC values via the laser pointer method as 2 seconds = TVC 10.? So maybe my TVC points are worth 10x yours.

Brian, They should only fight if you are in the unstable zone per my sketch. Peter

Brian, As a representative of the manufacturer I appreciate that you responded to my two posts, but I would ask that you please read them carefully as you are in part providing your customers with I

Keith I agree regarding hardware adjustments. but here we are talking about TVC and guiding which are two software systems for backlash compensation. They will fight with each other if not handled

I think as much as possible, considerations of DEC backlash on the mount should be de-coupled from PHD2's backlash compensation which is a feature of a particular piece of software.? DEC backlash,

I caution using too large TVC and trying to get this to "zero backlash" I spent about 3 months dialing in perfect TVC value to get zero backlash in the mount. The result was zero backlash when

Derek, I think you misunderstood what I said. Using the Allen key method, I measured the backlash at around 2sec by counting. I then found the appropriate TVC value to completely eliminate the

Michael Herman's power supply is far superior, though It would still acquire the Losmandy adapter as a backup.. Derek _____ Sent: Thursday, July 15, 2021 4:43 PM To: [email protected] Subject:

see no visible backlash, yet I still measure 2.5s in guiding assistant. *** 1a) Stiction and/or 1b) PHD2 is no good at measuring backlash.. They posted an update earlier this year to make it better,