(Topic ID: 125295)

Tech: Twister not detecting Ball on Magnet

By MrDo

4 years ago

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  • 29 posts
  • 11 Pinsiders participating
  • Latest reply 1 year ago by woody6092
  • Topic is favorited by 1 Pinsider


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#3 4 years ago
Quoted from pinsrus:

Did you replace the the flight sensor?http://www.marcospecialties.com/pinball-parts/545-5705-00

I ordered one of those but have not installed it yet. How would that affect either magnet when it is nowhere near them?

I'm not sure the magnets actually sense when a ball is on them, but they might.

#6 4 years ago

The "sensor flight" or the part you linked are the wings that are attached to the chase ball which is mounted on top the ramp in the right of this photo and originally came made out of cardboard I believe. If I get some time later I will look at mine and see if there are indeed any switches that detect the ball on the magnet.


#8 4 years ago

I may get around to putting mine on one of these days. The old one is worse for the wear. It about one of the only parts you can get for this machine anymore.

#10 4 years ago

It must have some circuit that detects the ball on the center magnet because that is the skill shot when you plunge the ball. I am looking into it now.

#12 4 years ago

Reading the theory of operation of the magnet board in the manual is like rocket science, but basically the circuits that detect the ball on both magnets are contained on the board and it is a changing frequency when the ball hits the magnet that triggers these on board switches. There are no more wires to the magnet itself, but there are three going out to the switch matrix at pins 5, 7, and 9. I would test to see if maybe the ball does catch during a skill shot and if it scores the reward. If not, the board, board connector, or wiring thru the matrix may have a problem.

#15 4 years ago
Quoted from MrDo:

I agree, the manual is absolutely ridiculous where that explanation is concerned!

To say the least! That rom info was a good tip and I'm really not too sure about the data exchange between the magnet board and the cpu but I would still check the three wire matrix connector for continuity to the next switches in line. Mine has always worked, but I will know what to look for if it ever fails.

Good luck!

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