If the ball guide was just a little bit shorter, then the flipper would not be pushing into the flipper rubber.
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Flipper hop, or ball hop, happens when a ball guide is located incorrectly at the factory. If the ball guide is sitting below the heel of the flipper you will get flipper hop. This is from one of my pins. The flipper hop was enough that it was hard to get a good hit on the ball. This kind of action is of no problem to the operator because he just wants your coins. He does not care if the pin is not set up for optimal playing.
This is my left flipper. All was well.
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This is my right side. When the ball rolled down that guide it would hit the flipper rubber and bounce.
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To fix the hop problem I took a piece of plexiglass and drilled a hole in it. Then I placed the guide into the hole and pushed it up to the wood block to locate the guide correctly. I placed the guide just a little bit above the heel of the flipper so I would get a smooth roll from the guide to the flipper. With guide now positioned correctly I taped the plexiglass to the play field and removed the guide. Then I drilled a new hole. I incorrect hole was filled with wood dowel and touched up with black paint.
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If the left pic, you can see where I drilled the new hole using the plexiglass as a guide.
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Quoted from sparky672:What is flipper-hop? There are no issues on the right... the bat is touching nothing. Maybe my photo's perspective is warped.
But if you don't have any flipper hop what I wrote above does not apply to you.