Re: Problem with PEMPRO polar alignment

Joe Zeglinski

    I get PEMPRO’s sometimes confusing target star selection,  a lot as well. I was out there last night for very many hours just to get a PEMPRO polar align on my AP-1200/CP4. There were times, when it showed “Finding Star”, then when it seemed to have found it, responding with  “ Adjusting period”, strangely, it then kept switching back to Finding Star, several times, until it finally locked onto something. I strongly suspect, without PemPro allowing a Dark frame to be included, it may be hitting on a vertical line of bad CCD sensor  pixels, and my camera has several. At times, I had to stop the AZ process, and click BACK, to reposition the scope to the original align Meridian starting point, before it kept searching into the far east/west horizon, with meaningless results, if any.
    You should check the astro sky reports, to see if the smoke in the upper atmosphere has finally cleared up in your area. Several nights, earlier, when I initially ran polar alignment, the task was an extreme chore, really a waste of time. It was finally better here in Ontario after a few days, and the skies are now back to fairly normal. So, last night’s PEMPRO “Star Finding”  inconsistencies were somewhat shorter – but it does work,, just requires user patience.
    Colder autumn nights will surely improve doing the alignment runs.
Joe Z.

From: maikner via
Sent: Saturday, September 19, 2020 5:16 AM
Subject: [ap-gto] Problem with PEMPRO polar alignment

I am setting up my new AP 1600 and having problem with polar align with PemPro. In step 5, the Measure Azimuth Error, trouble finding a star and never coming up with the error measurement. I did try the slew scope button to move a to a new field and did not solve the problem. Any suggestion??


Thank you for your help.

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