simont replied to the topic 'iOptron PEC update to drivers' in the forum. 3 years ago

Not clear to me here. You should acquire data with guiding OFF. What is "save 10PEC cycles"? You should save only the smoothed curve, a single cycle, in EQMOD format.Did you check that 1ms pulses are really applied by the mount? The procedure assumes that every pulse is correctly applied, if they are skipped or applied with a different duration the correction will be off. I found that 10ms seemed to undercorrect, so used 20ms.Yes, there are many checks missing at this point. Will fix them later.It's simply the polarity of the correction, which depends on how your camera is oriented, i.e. if a West correction will move the image toward negative or positive image coordinate. You have to try. If after PEC the error increases by about a factor of 2, you have to change direction.This is the index at which your PE curve changes sign for the first time. It is needed to avoid a big correction step at the beginning of the training. In fact, when the PE curve changes sign the correction needed to nullify the error is almost zero.

Read More...