Quoted from tscottn:
thanks. I think I got the problem fixed. I replaced the coil, sleeve and plunger, however my problem still was there, so i started to do some more troubleshooting and i found that the hundreds point relay that drives the coil needed to be cleaned, because when i watched the plunger studder i could also see the relay doing the same thing. So I cleaned it all up and it seems to have fixed the issue. thanks.
ps, im glad I replaced that coil anyway. the old one looked pretty bad.. probably would have lasted a long time but hey.. no biggie.
these machines are built like tanks..
Welcome to the wonderful world of decagon score reels.
When you work on these reels, there's lots of things to consider. Given that you had a coil that looked a bit worse for wear, the coil sleeve should definitely be replaced. Along with that, there is an anti reverse spring on a decagon that keeps the reel from going the wrong direction as it starts to step. It looks like a little finger sticking up. To test that it is properly adjusted, push the plunger in just a touch and see if the reel will go backwards. If it won't, you're good to go.
Make sure the EOS switch on the reels opens at the very end of the travel. Also, and this can happen, make sure the bracket that holds the coil in place and the plunger goes through is pushed all the way back, away from the reel. If it isn't, it can interfere with the pull in of the plunger and cause an issue like you described here.
Finally, there is a wireform that rides on the score reel itself, and the other end moves the switches on the reel. Decagons are notorious for hanging up between 8 and 9. The reason is a misadjusted 9 position switch. Quite often, they are adjusted so that the long blade is pushed too far into the short blade, and this causes tension on the wireform, and thus the score reel, and it hangs up. You want to adjust that 9 position switch so that it just closes when the reel turns from 8 to 9. That will cure the issue in the vast majority of cases.
Lots of people replace the springs, thinking it is an issue, but I have never had a decagon where weak springs caused an issue. Generally it's the coil sleeve getting gunked up, or the anti reverse spring, or the wireform/9 position switch issue.
These things are touchy and can be a PITA to get adjusted correctly. Once you do get them adjusted they're generally reliable.
It's just not a real good design IMO. I've had way more problems over the years with decagon reels than I have ever had with Bally/Williams reels.
Congrats of fixing your issue. People often neglect the score relays and they cause more issues than reels usually do, from issues like yours to reels not carrying over to the next reel.