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Thank you David,
I am aware of the inverted Polemaster position. I had to rotate it 180 degrees because the counterweight ?is in the way. Not an issue really, It just reverses the adjustments for polar aligning (up=down and left=right) but one adapts easily enough and the polar alignment is just about as fast.

Thanks, Sean. I'd have preferred the full zip file that is generated by the Troubleshooter, as that includes ASCOM logs which are not in the folder you created. Other than that, a quick review I see the following that troubles me, but then, I'm not sure if I'm reading the NINA log correctly. From your Gemini report, you are not using J2000 coordinates:


Yet all the target coordinates in NINA log appear to be precessed J2000. Not sure if that's how it should appear in the NINA log, or not, but this could be the reason slews are not winding up where NINA expects them. An ASCOM driver log for this session would help clarify what actually happened there:



Is there a reason that you have Sync disabled in the NINA centering routine?


If you can share the ASCOM driver log for that session, it might help determine what happened and what coordinates were actually provided to Gemini.

Regards,

? -Paul

It seems like a good idea, what I do is balance and then move the weight a little towards the end of the bar. By the way, Polemaster recommends connecting it to the opposite side of where you have it in the image.

On Sun, Jun 2, 2024 at 10:17 AM, George Cushing wrote:

Pretty sure the set screws are still imperial 1/16th" (1.5875mm). 2mm is 0.0787". Although my cheap 2mms?mic out to 0.0753". 1.5mm may work, if that 0.0035 thirty-five ten-thousandths of an inch isn't needed.

My special wrench measures 1.95mm or 0.076" via micrometer. The replacement screw is a #6x32 stainless button head which needs a 5/64" Allen key or 2mm. I bought a #6x32 screw multi-pack on Amazon a while ago in case I need to replace any of the cover screws on my G11. They all have the same threads, but have different lengths for worm cover, spur gear cover, etc.

Good luck,

John
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, Sequence Generator Pro and PixInsight user

On Sun, Jun 2, 2024 at 02:50 PM, Paul Kanevsky wrote:

Need troubleshooter and NINA logs, Sean. There’s nothing to go on, except for your reports of intermittent unexplained behavior.

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Paul,

I upload NINA and Troubleshoot logs to new folder " L6 Dec Issue". This was around 10:20-10:30 CST. By 11:07 I was able to start a sequence.

I 3D printed a bracket that clamps on to the DEC axis and has a vixen shaped column on the western side onto which I clamp a 5lb ADM accessory dovetail counterweight.?

Purpose of this is to have the western side of the mount slightly weighted. When I had the mount perfectly balanced I would notice a bit of backlash while guiding so this is an attempt to correct.?

I’ll post an update of the guiding here once I get a clear night (yeah good luck with that) from this SoCal marine layer. Rainy winter -> May grey -> June gloom.?

I also have a GM811, which I received new in March 2022. I typically have RA/DEC guiding at ~1.5 ratio (or worse), with total RMS typically about 0.8 arcsec. I’ve occasionally gotten my total RMS down to 0.5 or slightly below with the RA and DEC sometimes similar, but not always. I’m gaining experience in balancing the mount and cable management. As for PHD2, i use multi-star tracking with predictive PEC.

John

Need troubleshooter and NINA logs, Sean. There’s nothing to go on, except for your reports of intermittent unexplained behavior.

Update v41b

Several nights without issue, and then we had a clear night so I went to do the usual routine. Except this time the problem re-occurs, I had M81 in Framing and selected Slew & Center, and the same problem that it just can not correct DEC. I went to a different target and same thing. Went back to CWD park, disconnected everything and power cycled the mount. Reconnect NINA & Cartes and everything was back to normal/good.?

So since the previous good evening and last night, nothing much changed, but the "problem" does reoccur but then seems to fix itself.?

Just FYI but I also have a GM811 and also get 1.5-2.0x difference between RA and Dec. I’m still on L5 though and usually my RMS is around 0.8 or so. Dec goes as low as 0.4 but tends to be around 0.5-0.6, RA goes as low as 0.7 but tends to stay around 0.8-1.0. I don’t really see much elongation because of my image scale so I’m ok with this setup for now, but would like to improve it in the near future.

just my 200th of a dollar :)

jonathan

Interesting question.? Mine has been the same since I got it, with RA about 1.5x that of DEC.? I get some elongation in the stars, but not too bad as long as my guiding is below the image scale.? Still noticeable if you zoom in though.? I guide with a ZWO 2600 duo...so basically an OnAG.??


Brian

The PE did improve with PemPRO, but I'll have to dig up the logs for details and get back to you.?


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jamie.amendolagine@...

Hi Jamie,

What is your imaging/guiding set up? What does PE look like before and after PEMPro correction? Do you have any guiding logs with low RMS value but with RA being 1.5x-2x greater than DEC?

Regards,

? ?-Paul

Genius!

Thank you John.?
Clear skies

On Fri, May 31, 2024 at 12:11 AM, Ryan Noonan wrote:

Is there a trick to that one?

Yes, Ryan. You can take a 2mm(?) Allen wrench and chop off about half of the short side of the "L". Then file and sand it until it is square and smooth again. I have this special wrench in my Losmandy parts and tools box for whenever it is needed. The other choice is to disassemble the base part of the mount and remove all four bolts that pivot and lock in the altitude adjustment so you can reach that screw. The wrench is simpler - use a hacksaw or a Dremel cutting disc if you have one.

Good luck,

John
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, Sequence Generator Pro and PixInsight user

Hi everyone.?

I'm back from the eclipse trip, happily imaging with my GM811G at L6. For the most part everything is going great. Seeing has been really good lately and I've seen total RMS dip into the 0.2's which is the best that I've ever seen. The issue is that RA is usually higher than DEC, something like 1.5 x to 2 x, and I can see really good data, but the stars are elongated. I don't see the elongation very much when the seeing is not quite so good. When RMS tends to be around 0.5 to 0.4, the random jitters from the atmosphere seem to average out better and I get round stars. Data is not nearly so beautiful, but the elongation is not apparent. Any idea how I can tame the RA when seeing is exceptional? I have successfully trained PEC with PEMPro and it seems to work, but it does not make much difference to the guiding performance.?

First world problems, I know, but does anyone have an idea about how I can tame RA when seeing is exceptional??

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jamie.amendolagine@...

Good evening,
Had some worm/ring interface chatter that was growing worse over time (with worsening guiding) and I had a couple of spare hours today so I decided to clean and regrease my RA axis (DEC to follow this weekend). I followed the videos for the the cleaning/grease kit from Losmandy but it really only covered the needle bearings and didn't go into the removal/cleaning of the ring gear.

I managed to get those three small cap screws off the backside of the RA axis that hold the ring gear cover to the front of the mount but that bottom one sure was annoying, especially getting it tightened back in... Is there a trick to that one? Are people removing the RA Axis from the altitude adjustment block?

Thanks
Ryan Noonan