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Note that as per the Gemini.net documentation, one can't configure site info in the driver: "Note: It is not possible to configure the preprogrammed sites via the driver; this must be done via the

Perhaps it's worth asking Roland in the AP forum as to from where his recommendation stems - surely he must have done some experimentation or has seen evidence of this? Keith

Nice work, gang! Henk has got a really good system to investigate. That is, he can clearly see the RA periods and therefore his experiments to reduce them are possible. When he finds a solution

There is actually another option, namely to stack every 10 seconds and use no PEC or autoguiding at all.? That way the errors will never exceed the errors in a 10 second interval.? The technology is

Thanks Ian, that's good to know.? I think the inner block was misaligned because I had to make the flex couplers of my stepper fit, and those have some stiffness while the motor and worm were not

I had an issue (post DST change?) where EKOS thought the mount was pointing a different location than it was.? Doing a cold start and ensuring the latitude, longitude and time were correct sorted it

Well, had it setup with new calibration using the guide scope. Guiding started, and. Drumroll..... The clouds rolled in. Boo hisss. I'll have to try when it clears up.

Hello Henk, the high precision worm should give a periodic error of about +/-5” so it all looks ok to me (and the period would be 239 seconds). I found misalignment of motor and worm could give

Hi John,? thanks for the advice and the pictures of your bearing fitting in Alan's thread.? I believe the explanation by John Goetz about the 76 second cycle. Just spring loading will not fix it

To make sure what the frequencies are I imported Ekos' .csv file of the 2nd plot into Scilab and ran an optimization over the sum of a linear and 2 sines (8 parameters altogether).? The outcome is?

Henk, Just saw your additional post made while I was typing. Seems like you may have two separate occurrences with overlapping periods. So a glitch with both bearings? Wondering if some additional

Hi gang, Just want to report that I see no reaction after almost a month of room temp exposure of brass shim stock to CRC Caliper grease with MolyD, graphite, and teflon lube. The theory put forward

Henk, You have probably seen the discussion. Other than replacing the bearings, or honing out the right bearing block fit and compressing with a Belville washer, you might try squeezing the blocks

When I tighten the outer block (so both blocks are tightened) I have the standard non-spring-loaded Losmandy G11S mount.? It gives me an extra harmonic of 225 seconds (=3*75).? Hmm. I can't get the

Michael, I would agree except I did a calibration in PHD before I tried guiding so it didn't reuse an old calibration. I'll try again tomorrow night... Fingers crossed. Jim

That's an interesting puzzle. If you chose a hot pixel, the PHD2 should never have calibrated, as the "star" would never have ever moved. If it calibrated then locked onto a hot pixel in the image

Ok...I just kicked myself in the you know what. I should have thought of that but I didn't. You're probably right on with the hot pixel. That would explain everything. On a side note. I had just went

Hi Jim that's not a lot of guiding there, but my guess is that you are locking on to a hot pixel? there is a lot of lost star events, and this is a good example: [image: image.png] make sure you do a

Just testing with RA and DEC control turned off in the guider. Running with multiple stars. And to be sure that OnStep has no secret cross talk, disconnected the DEC cable.? After reading about the

There's probably not very much info in the logs. Since the mount started to act up in Metaguide, I stopped that software and started up PHD2. I did a calibration run where I was pointing and not near