(Topic ID: 120431)

TWD Flipper Stays up (sometimes)


By beefzap

4 years ago



Topic Stats

  • 11 posts
  • 8 Pinsiders participating
  • Latest reply 4 years ago by gweempose
  • No one calls this topic a favorite

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#1 4 years ago

OK so I searched the forum for this issue and the flipper sticking up posts do not seem to be the same as what I am seeing.

The flipper will stick in the up position during gameplay. Infrequently. But seems to do it on the second or third ball, never on the first. If I press the flipper button again it always comes back down. When I turn the power off the flipper goes immediately back down so it appears to be an electrical issue.

But, the flipper button does feel different that the one that is working correctly. feels like it is not as smooth.

So any ideas how to fix? Thanks

#2 4 years ago

Check the gaps and clean the contacts on your switches on the flipper mechs and the flipper buttons. Then check the sleeves inside the flipper coils for any binding that might be occurring between the plungers and the sleeves.

A good resource for these kinds of issues is Vid's guide to upgrading and rebuilding flippers here on Pinside...

https://pinside.com/pinball/forum/topic/vids-guide-to-upgradingrebuilding-flippers

#3 4 years ago

I've had a few Stern flippers to tight to the bushing and they would stick like you are describing. There should be a small amount of up & down movement if grabbing the flipper bat. If there is no movement, it is too tight. Loosen the nut, create a small gap and re-tighten.

#4 4 years ago

Try checking the buttons themselves. And the leaf switches.

On my Star trek I swapped out the flipper buttons for clear ones and the button itself was causing the flipper to stick up.

Seemed ok at first but the leaf switch behind the button was so close that sometimes it caused it to stick. Because of an actual bad plastic button. Next time it sticks, twist/turn the center of the button and if it drops that is the problem.
And the button didnt seem smooth as you described. Almost like a defect in the spring inside the button is causing it to stick.

It did not do it all the time either. And of course when you switch it off the flippers will drop.

My vote is this is the problem. Either try adjusting the leaf switch. Or see if you can clean up or swap for new buttons.

#5 4 years ago

Agree. Sounds like a flipper button or flipper button leaf switch.

#6 4 years ago

Thanks all , I will take a look and see what solves the problem

#7 4 years ago

I had this problem on my ACDC. It turned out to be the coil stop was bad. The stop is magnetically isolated via a brass sleeve in the steel bracket. When the stop gets loose, it tears up the brass and then the stop touches the steel bracket and completes a magnetic circuit so the plunger sticks to the stop. One tell tall clue is there will be lots of shiny brass dust under the flipper mech inside you cabinet. If you see a bunch of this shiny brass dust, the stop is toast!

I have had a few of these coils stops fail - it seems like they are not as good of quality as the old Williams stops - never had one of those fail like this.

#8 4 years ago

Had this problem....it was the backing nut on the flipper button being too tight causing the button to stick every now and then

#9 4 years ago
Quoted from erak:

On my Star Trek I swapped out the flipper buttons for clear ones and the button itself was causing the flipper to stick up.Seemed ok at first but the leaf switch behind the button was so close that sometimes it caused it to stick. Because of an actual bad plastic button. Next time it sticks, twist/turn the center of the button and if it drops that is the problem. And the button didnt seem smooth as you described. Almost like a defect in the spring inside the button is causing it to stick.

I wonder if this is a common issue with the clear buttons. The left flipper button on my TWD occasionally sticks. It feels like the spring is getting jammed somehow.

#10 4 years ago
Quoted from gweempose:

I wonder if this is a common issue with the clear buttons. The left flipper button on my TWD occasionally sticks. It feels like the spring is getting jammed somehow.

Did you put the screw and washer back in that holds the locknut. It seems like it kinda warps the buttons and causes the spring to stick. Try doing up the locknut as tight as you can by hand and dont put the original screw and washer back. It might help.

I also took out the clear button and kept spinning the center for awhile while watching tv.
It cleared up the sticky feeling. Probably left over edges inside from the injection mold.

#11 4 years ago
Quoted from erak:

Did you put the screw and washer back in that holds the locknut. It seems like it kinda warps the buttons and causes the spring to stick. Try doing up the locknut as tight as you can by hand and dont put the origional screw and washer back. It might help.

I did not put the screw and washer back. I just tightened the two plastic locknuts by hand. This is the same way I did it on WPT, and that game has been fine.

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