Gday Damo
I think I'm turning into a PEC addict
Nahhh, its just another diagnostic tool in the arsenal ( as is FFT analysis ).
If you can pro actively remove the bulk of the errors before guiding, it makes a the guiding a lot easier.
I always suggest people do a long duration plot with PEC off then on to get a baseline, then enjoy yourself.
At a later date, ,if something looks odd, just redo the plot and compare to earlier datums to get a hint of what might have changed.
I've run the new curve through PEMpro and If I understand this correctly I think I'm now getting 4.3 arcsecs pk-pk with the PEC on.
Yes and no, as it changes between each tooth, which is normal for the gearing Meade uses.
I replotted your data without it being overlayed by period as it gives a different view.
( you can see a scale at the top that shows the worm periods as a guide )
I see you still have a small high freq ripple in your data and that wont guide out at the frame rate you are using.
If you use the full range of the FFT window in the viewer, you will see this actually shows at 90x the worm period
and based on your gearing, this indicates the gear on the motor is eccentric.
Its only about 1arcsec pk-pk, but swapping motors might give a better result, but its a pain to do :-)
Just a game of chasing diminishing returns
Andrew Johansen Melbourne Australia
