1) F.N. Clutch (N2350~N2353)

When clutch is set in, head will go up 2.5mm more than the upper end of the head (15.5mm), where it is 18mm from the head down-end.
The sensing area of the clutch sensor is only 0.5mm, where it is from 17.5mm~18mm of head height. In the area, sensor detects head’s being up, and it turns ON.
The sensor’s ON is thought as equal to the clutch’s being set in, and FNC head becomes to be able to rotate at that time.
 (*If sensor turned ON without clutch being set in by mistake, head would turn around by force to cause skipping belt.

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