Klaas Robers wrote:It looks as if your picture is better than your sync pulses.
If you want to try a free running disc, it is better to run the DC-motor on a constant current than on a constant voltage. Due to the fact that the copper wires of the motor run hot, the wire resistance is getting higher and the motor slows down after switching on. If the current is constant (see the attached circuit diagram taken from the latest NBTV-Handbook) the driving torque is kept constant. The disc speed then depends on the air friction of the rotating disc, which is in your case nicely constant in your light tight enclosure. So once the speed is set correctly it will not change any more.
Hi Klass the koala wav was from 2012 the flying spot i forgot i had got it to sync very well towards the end .
I had a look at what i did and it is really the club motor control but with an added ...( LM317 to the motor control )....also to the motor so both ideas in one , and it sure looks good .
I just tried it and it again works ...so this helps a bit more .
So yes Klass the LM317 is added now
Pity about the mechanical distortion of lining up each line i understand it could be a slight wobble to the disk or my encoder is a touch off center so the opto reflector is seeing the spacing a touch off or a bit of both ....something that had me wondering to fix this if the mechanical control is now synced to the crystal clock why not switch the video sync mixer to the 400hz crystal clock ...... the motor control its still motor controlled by both the encoder and crystal circuits and the wanted video might now be undistorted each line lining up ...sounds to good to be true i know i have tried it before and i think there was a framing drift or just touch off begin and end positions like to just have a look at this again .