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Thanks, Ray! I had a clear night last night after making adjustments to the worm gear and checking to make sure the coupler and other connections were in a straight line while running (they were).?

Attached are my runs from last night. PEC On was the result of a curve I made from the PE measurement I ran last night.?

Adjusting the worm gear changed tracking, somewhat for the better. I am not sure it can get any looser though and the problem remains. I suspect something else is going on. I did preemptively order a new gearbox, fully aware that the issue could lie elsewhere; it did not seem like a bad idea to have a backup gearbox if there is another problem. Removing the RA motor and reattaching it could have also changed the PE result.?

It might be worth noting that I have switched power supplies on the mount in an attempt see if power might have been a problem. The battery in Gemini II is also less than a year old.?

Regards,?

George

Hi Russ,

Not sure what you mean by the 4 DEC bolts. Your PA is adjusted by the ALT/AZ controls. There are 4 bolts holding the ALT adjustment, two at the pivot and two in the elongated slots. You need to be careful with the final tightening side to side as tightening one needs a counter adjustment on the other side to stay centered. I replaced the original button head bolts on my G11 with the Losmandy replacement knobs for easier manipulations in the dark. I also now use a use two thin 3/8" flat washers, with a Belleville washer in between. This seems to give the right amount of torque once the Belleville flattens out. Also, I have found that the ALT adjustment stays in place longer if I give the big adjustment knob in front a final clockwise tightening turn so it takes up any slack in the inside surfaces, otherwise it can slide and drop a bit over time.?

For Azimuth you have the two bolts on either side of the mount for tightening down to base, and another button head screw/bolt which comes up from the bottom as a place the pivot. The pivot needs a snug up from under the mount head once in a while too. Also replacing the two upper bolts with Losmandy knobs is upgrade here as well, and once again I use the 3 washer combination.

When the MAL head is attached to the tripod you can also use the many smaller holes on the inside to go into matching holes on the top of the tripod plate. If you are using one center bolt to go to your pier, of course that bolt needs to be tight, and both the bottom of the MAL head and top plate of your pier must have very good flatness so there is no room for wobble. If you see some gaps there, some shim stock could help.

Hope some of the above is useful.

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

Chuck wrote:

Wild guess. If you're running Gemini telescope during this cal, Chuck that Gemini telescope is set to guide. I got
wild oscillations and thought I had a cable snag but telescope was set to slew! Oscillations disappeared when
guide set.

Hi Chuck, autoguiding should not be enabled when collecting PEC data, so that is not likely the problem.

George, I'm still waiting for you to post the PEMPro log file if you want me to look at it.

-Ray Gralak
(Author of PEMPro)

I discovered the G11G and scope were still wobbling and it appears to be a DEC adjustment issue. The 2 bolts and 2 hand adjustment bolts for DEC adjustment are hand tight but mount wobbles. However if I tighten all 4 of these bolts extremely tight, the wobble almost disappears. Is this normal? Have feeling getting a good PA will be impossible tonight. Once goid PA made, tightening these bolts extremely tight will probably throw off my good PA.

Here is the link, there is a PDF pattern in there.

https://store-losmandy-com.3dcartstores.com/ma

I am going to disassemble my G11G off my permanent pier tonight and check and see if the bolt between the pier and G11G base is a little loose. I don't like the fact the whole assembly seems to wobble and my PA is always off by 5 arc minutes everytimeI check it. I believe the base of the G11G has a single hole in it for as mounting hole for a bolt from a pier. Is this correct? Drawing or picture would be appreciated.

I see the L6 update as an almost free upgrade to the mount. The higher resolution has improved guiding quite a bit for me.? There are also several bug fixes that make the mount behavior more reliable and just better.?


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jamie.amendolagine@...

FWIW I have been using Pempro with a very early alpha version of L6 for almost 2 years using the 1x control option, and I have seen a benefit. ? Creating the model using 2 period long data sets has been very effective in reducing/eliminating the 42 second spike for my G11T.? That by itself is worth the price of admission to me. ? I have just sent my Gemini II in for the factory up grade to the L6.2 and vs 3 of the servo controller firmware. ? I am looking forward to using the PemPro with the updated Gemini II firmware that everyone has worked so hard to develop. ?? I like the Pempro and find it pretty easy to use. ??

Cheers!

JMD

On Wed, May 1, 2024 at 06:15 AM, @VictoryPete wrote:

Could someone post a link to Pempro and Gempro? I am not sure what these are.

?

Pete,

Only Pempro is available, found here Best explanation for what this does is on their website

Could someone post a link to Pempro and Gempro? I am not sure what these are.

Ray,

I guess the important question I would have is; would there be any difference or advantage to having Gempro over Pempro? And if we purchased Pempro, would Gempro be an upgrade or would we have to purchase the full version???

Hi Russ,

I have been putting off purchasing Pempro for the past year while waiting for the Losmandy version (Gempro??).
Are there any updates on that yet?

GEMPro is on hold until a decision is reached concerning whether/how to support PEC at non-sidereal rates (e.g., tracking comets, satellites, asteroids, the moon, sun, etc.)

-Ray

Hi Sean, are you part of the Gemini-II groups io page? ?If so then download the /g/Gemini-II/files/+++%20Gemini%202%20Level%206%20Upgrade%20+++/UNOFFICIAL%20PICKIT3%20REFERENCE%20ONLY%20for%20DIYers reference document. Also, download the servo firmware hex file, also found in the files section.?

Here is the programmer as listed in the doc.?

Thanks,
Ray

On Tue, Apr 30, 2024 at 01:12 PM, Russ wrote:

I have been putting off purchasing Pempro for the past year while waiting for the Losmandy version (Gempro??). Are there any updates on that yet?

Ray or folks at Losmandy can provide a more definitive answer, but my impression is that while GEMPro is still a possibility, it may be a while before it becomes reality. Meanwhile, we now have Gemini L6.02 that is fully compatible with existing PEMPro. If you can't stand the uncertainty :) or don't want to wait any longer, I'd recommend to get PEMPro. You can always do a fully functional trial version of PEMPro to see if you like it and if it works for you.?

I have been putting off purchasing Pempro for the past year while waiting for the Losmandy version (Gempro??). Are there any updates on that yet?

I just added Ray's links to my cart, and think I will proceed with that. I know nothing about PIC programming and all that, and just knew the pinouts did not match, so I was more or less about to pay $150 for that little adapter. I think Ray provided the solution with his second link.?

Now the question is, what software is used to program? Is this software provided with the PIC3 programmer?