A manufacturer of tree harvesting
equipment needed an encoder to measure the cut length of tree
limbs passing through the machine. This manufacturer had
experience with magnetic encoders but had found that such
devices could not survive the extraordinary high shock and
vibration of the application.
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Cherry developed a magnetic
incremental rotary encoder in anodized aluminum housing and
sealed it against dust and moisture. Electronic components were
fully isolated from mechanical components. The device was
designed and tested to survive 200G shock loads and 75G
vibration at 50 to 2000Hz.
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Finite element analysis and
magnetic modeling enabled virtual prototyping of the design.
Cherry’s extensive experience with the encapsulation of
electronics for rugged environments resulted in a product that
far exceeded the performance of those offered by competitors.
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