Hi Paul,
Are you saying your uncorrected PE is over 7 arc-sec peak to peak. If so, you really might want to get a new worm from Software Bisque, or try the worm you already have for declination (just swap them!). 7 really seems too high. My MX, even with it's weird slew problem, had under 3 arc-sec peak to peak, and corrected to well under 1 arc-sec. It may be that something needs adjusting which would correct both your PE and guiding issue. Personally I'd have a real close look at the 1/4-20s (the two hex bolts on opposing ends of the worm). These hold the worm against the ring gear and are not too hard to adjust -though best done by two people. First loosen both bolts, then press upwards to engage the worm as deep into the gear as possible. Then simultaneously tighten both hex bolts. After that take Greg's advice and readjust the cam-stop. You shouldn't be able to feel any free play if done correctly. Also, while you are at it check the positioning of the plungers. They should be 2.25-2.5 turns out.
Re PEC....I don't know what program you used to measure and implement this but the jury is still out re TSX (in the Southern Hemisphere!). For sure PEMpro works and I've had terrific results. You might want to give the free trial a go.
Anyway, perhaps these ideas will fix up your guiding mystery.
Good luck,
Peter (mountless and waiting for SB to send back a repaired unit!)
Last edited by PRejto; 29-01-2014 at 06:08 AM.
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