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aussie_bloke wrote:
THOUGHT FLASH: Oh one this just occurred to me, looking at Harry's schematic of the main sync board, I notice there was a connection between pin 3 of the 555 timer and pin 3 of the 4046 but a then a couple of lines drawn over which I "assumed" as an indication of a wiring mistake so I didn't connect the pin 3s together, question for Harry, those 2 lines are they crossout of a wiring mistake or is it meant to be a capacitor? If so then there's at least one of my problems!
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Now questions about the encoder disc circuit, the width of the negative pulse part of the wave form on scope, is that meant to be 2.5ms?
After getting the motor to around 750 RPM I then fine tuned the speed control to get as best as possible sync, then I adjusted the encoder disc circuit to see if I could get the sync locked in but no success.
aussie_bloke wrote:Thanks for the info, I will get onto checking it all out. Harry the record disc unfortunately is warped hence the brushing against stuff, also the encoder disc is not precisely centred even though I tried to get it centred so I wonder if that has a bad effect on synchronicity?
aussie_bloke wrote:Thank you Gary for the templates and the program that does the 1.5 turn discs . Will definitely stick a masking in front of the disc to prevent light spillage.
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