Fultondale, AL
I'm having the same issue. T-rex begins to raise, then chomps. He has raised about 1/8" to 1/4" when the chomp happens so he just knocks the ball out of the hole.
(Topic ID: 240840)
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Jurassic Park
Data East, 1993
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Quoted from Jimmyapple:So I think I figured out why it’s not working. The tRex up and down motor will sometimes go all the way around and then sometimes it goes backwards. When it goes backwards it gets caught behind the down switch and then kicks back over. If I bend the switch so it triggers both ways it doesn’t work properly. Is the motor supposed to go both ways? Or is it just supposed to go clockwise? I watched the times it ate the ball and it only ate the ball when it went clockwise.
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Found this in the manual, so it looks like it does turn in both directions.
trex motor (resized).JPGFound the problem on ours. It was the classic broken wire in the harness. I figured it out by using the t-rex test mode. The jaw would snap perfectly in every position except all the way down. As soon as t-rex moved up just a fraction of an inch the jaw would start working again. I just spliced in a 1 inch piece of stranded wire, soldered it and wrapped it up in electrical tape. Works perfect now!
Quoted from winteriscoming:That's a diagram of the left/right motor and bi-directional relay for it.
The only motor that is bi-directional is the left/right motor. The up/down motor should only be turning one direction. The movement in that one direction makes the t-rex go down and up.
Oh, good catch. That does make more sense!
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