- Joined Oct 3, 2010
I have a machine that is a thorn in my side. it is a tubular stranding machine. basically a stationary machine with a giant spinning tube inside, and inside the giant spinning tube are stationary gimbles which contain reels of wire. there are 9 gimbles, and a VFD on each gimble. It has a profibus network, and the designers have run the profibus through sliprings. I am forever having issues with the slip rings. if a wayward piece of lint happens to light upon the slipring, the whole machine falls on its face and I have to dive into it (literally) and go clean the sliprings/brushes. This used to happen maybe once every month or so; now it has become almost once every shift. I am trying to come up with a solution. I think by doubling the # of brushes I can square the chances of success. please have a look at the drawing. I am hoping someone here is familiar with profibus DP, or any kind of input about transmission lines would probably be helpful.
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