root42The motor of the 101SM mechanism is a slightly different variant. All the motors have tachometers, so they have four wires: two for the actual motors, two for the tacho. For the drive unit this black piece fell of, it was glued to the top, same as visible in this pic for the other motor. I wonder what it's for. First I thought maybe it's a magnet for the tacho, but it seems to be a solid plastic piece, not magnetic.Maybe some kind of protection for the cables?
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