Well done on your diagnosis so far.
Quoted from izzicat:But my real question is "am I missing something here"? Can you come up with a reason why 2B is actually meant to engage before the 5th iteration of 1A? Is something else going on?
When a 500 or 5000 point target is hit it fires the C or D relay. After the momentary pulse from the target switch the C or D relay holds itself on until the normally closed Score Motor 2B switch opens which shouldn't be until after the 5 pulses from the 1A switches. The Score Motor should keep itself running past the 2B switch pulse until the switch at 1C opens.
Atlantis score motor (resized).jpg
So the sequence would be:
- Target switch closes
- C or D relay fires
- Score Motor starts
- 5 pulses generated as the 1A switch closes
- C or D relay relaxes when the 2B switch opens
- Score Motor stops when the 1C switch opens
If one or more of your Score Motor cam followers are damaged that could mess up the sequence.
/Mark
Lincoln, MI
