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Adjusting sling and pop bumper switches

RudeDogg1

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10 Years
Joined
Dec 27, 2012
Messages
8,551
Location
Barnstaple, Devon
Is there some kinda knack to adjusting sling and pop bumper switches? One pop and the left sling switches arnt as sensitive as I'd like. But can I get em adjusted right can I fook! Adjusted them 3 times today and still not right!
 
I've only tried adjusting the slingshots. I just squeezed the contacts together, maybe with a little bending. I went a little too far with one so it was always 'on', so I just went the other way a bit and they are now perfect. I like the slings as sensitive as possible, just so long as they aren't going off without any ball contact.
 
Also it's much easier with a leaf adjust tool, which has a slotted end to allow you to apply just the pressure you want, and no more. But yes, it can be a ******* to get right.
 
Yeah got one of them will have another go tomoz. Trying to optimise the machine ready for its charity stint at my work place
 
With a jet bumper, I make sure the contacts are clean, then that the point coming down from the bumper skirt is exactly central in the 'spoon'. It's important to have the long blade of the switch tensioned properly against the spoon/point; not so stiff that too much effort is needed for a ball to move them, but not loose enough for vibration to have an effect. Then adjust the backing of the shorter blade to set the gap between the contacts. Make this as small as is sensible, particularly with 'Special' or 'Direct' switches, which will lock-on the coil if they stick closed. Ideally, full deflection of the bumper skirt should see the contacts close, and then over-travel or 'wipe' to help keep the contacts clean.

I sometimes changed the game adjustments where bumper hits were tallied, such as Raise The Dead, jackpot countdown on creature from black lagoon, or Super Jets, if I felt that the features were programmed for the frankly ****-poor assembly line bumper adjustment. Straight Jacket Escape could be completed in one bumper sequence after adjustment, whereas it couldn't out of the box.

An operator that I bought a Firepower from said that he used a PTFE spray in the hollow of the plastic spoon. The effectiveness of this may partly explain why it was a few days before I noticed that one of the four bumpers wasn't actually working - the three remaining ones were incredibly sensitive.
 
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