I have been working with
Ben Dan on his 60EC problems.
He was going to tag onto the current 120EC thread but now we have his results, it is probably better to start a new thread.
Basically, he was getting eggy stars at times, and on analysing his data, it showed a really odd error at about 17x the worm period.
This didnt line up with anything known, but then i noticed his frame rate was close to the SDE rate for this mount
and my simulator indicated that for his given frame rate, SDE would show at about 17x
I then suggested he needed to get a high framerate dataset to confirm or discard the theory.
He then practiced doing slow calibrations followed by high speed unguided data grabbing
and his results show some of the best/clearest SDE to date.
Have attached a plot of his RA and DEC via PHD viewer so you can compare the DEC trace ( which indicates seeing )
and the RA trace, that shows "visible" SDE of about 2 arcsec pk-pk.
The PEMPro plot merely confirms this ripple is 54x the worm period, ie the known SDE frequency.
IIRC, other 60EC users with clear SDE tried different firmwares over time to try and reduce it,
but there are so many threads now i cant make sense of all the replies
Sooooo, is anyone out there using a 60EC that had bad SDE, that is now "better"
and if so, what firmware are you running.
Andrew Johansen Melbourne Australia
Edited by OzAndrewJ, 04 August 2020 - 09:38 PM.