i feel your pain
as i struggled greatly to get two different losmandy mounts to track
was on the verge of smashing them on more than one occasion.
thought it took quite some time, by the time i sold my mount years later it had a very smooth PE with less than 2" peak to peak amplitude without any sort of PEC.
and yes, one was a bad ovision worm
where's the satisfaction if it's easy?
i'm not entirely sure i understand the problem
the point of the calibration step is simply to get the orientation for the autoguider
a little slop in that step is not the end of the world, you can still take images.
if i understand the first set of images, you are getting bumps when you actively slew the mount
the bumps when you slew the scope are more mysterious
particularly as there is none with a western slew.
but what about tracking?
do the jogs occur when you are simply tracking on a star rather than slewing the mount?
what does it look like if you just run unguided on a star for the period of the worm gear?
try it with poor polar alignment so the star drifts
showing your periodic error.
sounds like you're a vet, but be aware that if your mount is balanced too perfectly, it will bounce around, particularly when slewing
what imaging setup are you using?
silly suggestions, but be sure the mount is set to titan in the gemini software
and be sure the guide rate is nice and slow, 1/2 sidereal at most.
the losmandy boards can be quite helpful...if they don't send you on a wild goose chase
scott losmandy is very friendly
PEM Pro can be helpful in tracking periodic error
but i'm not sure if the issue is PE or unusual jumps when slewing.
ok wait, it only happens when maxim moves mount...
just set your mount east heavy, dec balance good but not perfect, and polar align so you get slight dec drift
i think you may find it works better than expected
unless there are PE issues in addition to this
Edited by bill w, 09 September 2014 - 03:02 AM.