Chuck, The worm gear revolution is 8 minutes so it has to be eight minutes to record the corrections into the PEC circuits. What I am hearing on the Losmandy group is most people don't turn on PEC when using an autoguider or a webcam with Guidedog. I think PEC is mostly used with manual guiding. Astrophotography is a tough learning curve but it is so rewarding when I have images to process. Every time I go out I seem to learn a little more. Thanks for all the kind remarks guys. It is amazing what a DSLR camera can produce. The results are instantaneous and you know if your tracking or focus is all right. If not, you can fix it. With film, you don't know how your pictures will turn out until the film comes back from the lab. Deb

From: Chuck Hards <chuckhards@yahoo.com> Date: 2005/09/06 Tue PM 08:34:08 MDT To: utah-astronomy@mailman.xmission.com Subject: [Utah-astronomy] Re: M22 Image posted - Success at last

That's too bad, I can see where that would be a de-motivator, especially if the mount has some backlash- and it sounds like it may, if it sometimes takes a little time to start tracking after you've set it on-target. You might try ever-so-slightly unbalancing the mount, making it heavy on the "uphill" side, so it is always verrrry slightly loaded. That should remove some backlash and make tracking response more instantaneous. Drives usually fare better when working against a load, rather than acting as a governor or escapement.

Does it have to be an eight-minute training period? Can you cut it shorter? Is eight minutes one complete worm or spur rotation?

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From: <astrodeb@charter.net>

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Chuck, You have to turn it on and guide for an eight minute cycle. My mount is non-Gemini so that means you have to do it every time you turn it on. Gemini mounts have a permanent memory so your hard work is saved.

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