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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,

Alan, I tried to search on “forward lash” and all I got was links to custom eyelash extensions !? What physical cause are you describing with this term? -- Edward

Allen, You can set the step size on he brain/algorithm form. Default is 500ms. Are you imaging or viewing with this scope. I have a 12" F4 truss Newtonian. I figure with all the added gear for imaging

Think I've cracked and eaten this nut. Here is what I did: 1. Renamed the observatory to Sheep Field Observatory. 2. Replaced the two thrust bearings. The ring gear now moves much more easily when the

John, Alignment was not an issue with the third bearing. I estimate the shaft if 3-5 thou undersize. I think this was done intentionally by Losmandy for various reasons. Chrome plating might be an

Alan You are thinking it's a software conflict. Your mount is selected in Stellaium as ASCOM and your chooser comes up. Make sure that shows the correct mount type. If it defaults to Titan, I think it