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Linear cable engine.
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Previously:
https://www.homemadetools.net/forum/...524#post215697
https://www.homemadetools.net/forum/...161#post211100
https://www.homemadetools.net/forum/...140#post199460
https://www.homemadetools.net/forum/...314#post196268
https://www.homemadetools.net/forum/...949#post175732
At the risk of sounding like a DA - What is the work being accomplished here?
They are moving that cable from over there to over here. Ha, just kidding.
That structure just looks like a BIG cable tray, like like you might find hidden in the ceilings of many buildings. Cable has limits in regard to how much tension you can use when pulling them. This is especially critical with fiber optic cable. It is possible that big cable contains thousands of fiber optic strands. If you are making a long pull, if you only pull from the end, it is easy to exceed the that maximum limit.
While I do not know for sure, I am guessing that is an intermediate pulling station. It would allow pulling a longer cable without exceeding the maximum tension limit.
That is my guess.
hemmjo; That is not just your swag, you nailed it. A construction company I do quite a bit of work for has several of the much smaller versions of that machine, theirs also incorporate compressed air to assist in pushing the optic cable through a buried pipe from 1 end while pulling from the opposite end. So far I have rebuilt 2 of their machines, which are a real pain to rebuild, due to the lack of spare parts available from the manufacture who no-longer supports the machines they made after being bought up by a larger corp.