Quoted from keywest:
Thank you very much. I think I figured it out.
It appears the wiper shaft can be keyed 180 degrees off. The number wheel has multiple pin holes so I was able to simply re-position the number wheel and now the correct number is showing and payouts appear to be working properly - surprisingly easy fix.
or put another way, it doesn't matter which way you key the wipers on. If necessary, you reset the machine so the wipers home, then stick the number wheel on appropriately
wrt the wipers stopping before rotation completes, the possibilities are:
1] the clutches are too oily. Did you firmly squeeze/wipe all the surface oil off the leather with a paper towel/rag? You shouldn't see any liquid on the leather surface.
2] the wiper fingers are applying too much pressure on the contact plate and snagging the edge of the rivets. Hopefully you can manually spin the cams and look at the wiper contacts enough to see if that is a problem. If it is, you may be able to adjust the finger tension without taking things apart.
the tension would need to be really high for #2 to be the only problem. Excess wiper tension is usually more of an issue with stepper unit resetting.