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  1. #1
    Join Date
    Dec 2013
    Posts
    645

    Default Bennett Driven Wake Plate

    Here's a technical issue for those who are into solving problems.

    I designed a hydraulic wake plate system that is powered by Bennett A1200S actuators. I designed the system before I understood how the actuator position sensors work. It seems the sensors are a coil that senses the position of an iron rod inside the piston. The problem is that the rod is not restrained, but is held at the bottom of the piston by gravity...nothing else. The piston pushes the rod up into the sensor as the cylinder retracts, and gravity pulls it back down out of the sensor as the piston extends.

    My design uses 2 actuators that are mounted horizontally, so gravity no longer holds the iron rod in the piston. That means the rod no longer moves with the piston, but rather just sits there. No motion of the rod, no motion sensing. And that's the problem I have to solve.

    I have a spare A1200S cylinder on order to play with. I have to find a way to lock the rod into the piston. The obvious solution is to epoxy the rod to the piston, but the issue there is the rod is in the "wet" part of the cylinder, submerged in automatic transmission fluid. I am not sure of any adhesives that are stable in ATF. In the mean time, has anyone else run across this problem before?
    Last edited by CJD; 02-10-2021 at 04:04 PM.

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