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John J

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Discussion starter · #1 ·
I want to remote control my 25 ton MOW crane. There is not enough room for batteries in the cab with all the servos and things.

Any know how to make slip rings?

I want to make some sip rings so the cab can rotate.

JJ
 
#3 ·
My thoughts would be around getting an automotive atlernator that was shot. They'll have copper slip rings about 1" dia and a brush box you could probably salvage, and will have standard bearing sizes for the shaft.

Thats assuming its the electrical power you are wanting to get to the swivelling bit.

Cheers
Neil
 
Discussion starter · #4 ·
What I am looking for is something to get power inside the cab of the crane. Much like you see brushes on the armature of a motor. Neil has one idea. If I come up with something I will post it.

Anyone Else got Ideas?
 
#5 ·
John,
I made something like that for a fellow some years ago, I used a unetched PC board blank, cut out a rough
circle on the old band saw, drilled a center hole, chucked it up in the lathe, turned the blank to the dims I wanted,
cut away all the excess copper, leaving 2 separate copper rings for the brushes to rub on.. By now U should be
getting the idea, U can take it from there...
Paul R...
 
#7 ·
Why do people have to do things the hard way???? Take a length of pipe and a pipe cutter and then slice two lengths off it. Two lengths of brass strip bent to the rings will provide power to the rings. This then fits around the pivot shaft for the crane. Job done.

regards

ralph
 
#8 ·
Depending on the available room in the cab, either idea works. Don't know why you had to insinuate that people are doing things the hard way?

Mounting a flat piece of pc board on the cab floor at the moment seems simpler that figuring out how to mount the 2 rings apart from each other centered and insulated from each other. Maybe you mean rings that just fit the pivot shaft... of course smaller diameters will put more stress on the pickup system.

I think everyone was doing fine throwing out ideas, and there's hopefully some more to come.

Regards, Greg
 
#9 ·
Another thought--we often find some great parts at our local recycling yard where people bring old vcr's, computers etc. See if you can find an old hard drive and take it apart--they are about the right size and have beautiful bearings...then you can just use one of the methods above to transfer power. Sometimes VCR spools have nice bearings too JJ, you may just have to use a punch to knock out the pressed in stud they use as a center point.

Keith
 
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