I was getting overshoot on the frame sync when I started a video and I also noticed it would only slow down to match sync even when sync was only just a nudge forwards. As I like control systems I thought I would have a play. The system now syncs very fast from either side of the frame. My crappy motor is making even more noise from the gearbox and the vertical jitter is the gearbox backlash. The new motor should be here soon I hope. I will test it out a bit more and see if it is stable.
Here are a couple of videos showing the sync in action
youtu.be/6kkBuGtoFh4
This second video the motor glitches on start which I fixed for the video above.
youtu.be/l4aJG9mlMRg
Is it fast sync?
Cheers
Keith