![]() ![]() The position of the encoder is available immediately on applying power. Magnetic encoders operate in harsh environments where optical encoders would fail to work.Īn absolute encoder maintains position information when power is removed from the encoder. Due to the flexibility in many off axis encoder chips they can be programmed to accept any number of pole widths so the chip can be placed in any position required for the application. This offers flexibility in design and low cost for custom applications. Off-Axis Magnetic: This technology typically employs the use of rubber bonded ferrite magnets attached to a metal hub.Poorly designed internal interpolation can cause output jitter, but this can be overcome with internal sample averaging. Resolutions can be as low as 1 degree or as high as 0.09 degree (4000 CPR, Count per Revolution). ![]() The accuracy can vary from a few degrees to under 1 degree. Because it can be fixed to the end of the shaft, it can work with motors that only have 1 shaft extending out of the motor body. ![]() On-Axis Magnetic: This technology typically uses a specially magnetized 2 pole neodymium magnet attached to the motor shaft.Optical encoders are very sensitive to dust. This is one of the most common technologies. ![]()
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