Post some clear top view pictures showing the switch gaps.
(Topic ID: 183508)
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The rubbers look too loose to me so they're rebounding too much - I would go back to 2.5"
You can also try putting a piece of paper between one switch to stop it activating so you can see which one needs more gap adjustment.
BTW, the leaf against the rubber needs to be hard up against it (I don't mean touching, I mean pushing against the rubber), otherwise the rubber will tend to fling the leaf backwards (towards switch closure) on return.
Quoted from mbaumle:Does this era of Bally have those small ceramic disc capacitors along the switches?
The way Bally does things is they ignore switches that are "stuck closed" so shorted switch capacitors won't do this. Slingshots shouldn't have capacitors on the switches anyway 
Quoted from ForceFlow:Are these slingshot switches part of the switch matrix?
Yep, they're part of the switch matrix.
Quoted from mbaumle:Quoted from Quench:
> Slingshots shouldn't have capacitors on the switches anyway
Are you positive? No disrespect, but I'm almost certain they had little ceramic capacitors wired into some switches to artificially keep them closed a bit longer to the CPU had more time to "see" the switch closure. I remember my last Bally/Stern had them wired into the pop bumpers.
Pop Bumpers: Yes
Slingshots: No
Mystic_FastReactCoilSwitches.jpg
Quoted from frunch:Just curious, any idea why the pops get them but the slings don't?
Not sure actually, maybe to reduce the indirect edge sensitivity of the slingshots since they're a greater hazard for outlane ball loss.
I don't have an early Stern machine handy at the moment, but a few Stern schematics I've looked at don't even show capacitors on the Pop Bumpers, yet some schems show caps on drop targets?? although the early solid state Stern manuals are a bit all over the place.
Essentially you'll see caps spec'd on switches that the ball hits at high speed like standup targets, rollover buttons, etc. which are important for game play. Capacitors extend the time of switch closures so the MPU can better sense them when it scans through the switch matrix.
Glad to hear the OP has resolved the problem!
Quoted from aobrien5:Alright, so when the slings hit on this game it's supposed to switch between eye and pyramid.
Ok, please ignore what I showed on the switch schematic about the caps not being on the slingshot switches.
Can you re-install the caps and report back on the intermittent mode change issue.
Since you've reinstalled the tighter rubbers and adjusted the switch gaps, that may have fixed the original machine gunning problem. Don't forget to make sure the leaf touching the rubber is hard up against it.
I put a cap on a slingshot switch on a machine and on the rare occasion (about one in 20 hits) it will double sling. You were using a 0.047uf capacitor and not a higher value?
Quoted from dothedoo:You could try a smaller value cap too, like 0.01uf.
I tried other capacitor values earlier when trying the 0.047uf cap.
0.022uf still double slingshotted but was more rare.
0.01uf didn't double slingshot but on the very rare occasion missed scoring (it is better than no cap though which misses scoring a little more often on very fast ball hits).
The OP might get different results but it doesn't look like lowering the cap value will solve this.
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