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Old 19-09-2014, 10:04 AM
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Amaranthus (Barry)
Thylacinus stargazoculus

Amaranthus is offline
 
Join Date: Jan 2014
Location: Judbury, Tasmania
Posts: 1,203
Yep, as Ray notes, you MUST recalibrate PHD after making a change in the sidereal rate - otherwise the corrections will be 5 times too large compared to its training movement! I'm still convinced this is the problem.

Task:
-- Set guide rate at 0.5x sidereal in ASCOM (leave other settings as is).
-- Set exposure to 3 sec.
-- Set noise compensation to 2x2 mean.
-- Set RA aggr to 80 and Hyst to 15.
-- Set DEC to resist switch.
-- Set min movement of both to 0.25 pixels.
-- Set max RA and DEC movements to 1000 ms.
-- Point at DEC 0 and maybe 5 degrees east of the meridian.
--(Re)Calibrate PHD. Make sure that calibration used at least 8 steps (if not, adjust the pulse duration in the Brain settings).

Do all this, and report back
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