Claw machine problem

AlkalineJay

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Hey guys, question about a claw machine I picked up: When you turn it on, the claw moves like its trying to return to the back position, but it rolls to the back left corner and just keeps running on the track, its not stopping whatsoever. I was thinking maybe one of the switches that tell the crane its at a stopping point has went bad? Any input would be greatly appreciated. Thanks, -Jason
 
back left (your left???)
or back left as in left side to the machine i.e.: your right ??

cuz if its going to your back right, id say the train (part that moves) is on the track backwards, if that makes sense...

its also possible one of the transistors that runs the motors is shorted out causing the thing to run constantly..

i would definately check all the travel switches with a meter to make sure they are working properly..
 
Resurrecting an ollllddd thread. This one has been on the backburner a bit, looking to get it up and running. I want train myself to become a claw machine master! haha This claw machine isnt a very common one (not in my opinion) I have seen one or two more, but thats it. It has the statue of liberty on it with an american flag background, and the board reads "Classic Inc. Crane Circuit" and is dated feb 1995. I have reseated all the chips, but still getting no love out of this. Are these pretty hard to find replacement boards, or are cranes somewhat universal in that they just need a board to run them? Any help would be appreciated guys, I'm not very knowledgabe on cranes, but I would LOVE to get mine up and running again.
 
claw moving in wrong didretion and not stopping

some claw cranes do not have a forward limit or right limit switch. Almost all cranes have a left limit and backward limit switch so that the claw will open when the claw is home. most claw cranes open a switch contact when the limit is hit. this is a fail safe method in case a wire breaks. The old style relay cranes were not as voltage level sensitive. The newer solid state or digital cranes are. They need good TTL logic levels. Check the switches for good low resistance when they are closed. I don't mean the power supply, although that level needs to be good too. I mean the signal level going to the chips. They have to be good TTL level low and good TTL level high.
 
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