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Chattering Bally SS Flipper Help/Advice please
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Question
Rich
Haven't come across this problem before.
Noticed it during game play, it just isn't right.
I have read a few threads about this issue and they leaned towards a tired hold winding.
I can flick my middle finger off my thumb against the flipper rubber and the flipper bounces/chatters, no firm hold.
They are Bally SS linear flippers, they are staying so please don't suggest changing them as that isn't the problem.
1. New coils - tried swapping out for another, used coil, same problem. 25/500 - 34/4500 even swapped where the wave washer sits thinking it may help, it didn't.
2. New sleeves
3. New cabinet tungsten tip flipper switch contacts
4. New EOS switches but no tungsten tip contact, silver plated copper mushroom contact, bought from.....leaving this out so as not to put any shame on the company. Contacted them about this because any EOS contacts should in my understanding be tungsten.
5. 43.6 VDC at flippers and 43VDC at flipper coil
6. Mechanically perfect, zero resistance, nice and smooth.
7. Tried various EOS gaps and it doesn't make a difference, well it will if they are too close and don't open.
8. Tried changing at what position the the EOS contacts open, the later the better but still bounces.
9. Caps on either/both flipper and EOS switches makes no difference, except for arcing, so no voltage drop significant enough to affect the hold winding.
Using a multi meter measuring the voltage at the coil upon pressing the flipper switch I noticed it pause ever so briefly at about 20VDC then go to 43VDC.
My understanding is the larger the contact area with minimal resistance the better for current to flow. Might it possible that the EOS switch contacts being a mushroom head, not flat, therefore less surface area making contact hence more resistance and not tungsten tipped be the cause of this bounce?
I could answer this myself if I had some tungsten tipped EOS contacts handy, but I don't.
I have shitty pitted EOS switches on some of my pins and the flippers work fine.
So wadda ya reckon?
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