normal rotation; forward rotation
Technical term used in machinery and engineering contexts to describe rotation in the standard or forward direction, as opposed to reverse rotation (逆転).
Please check whether the motor is rotating in the normal direction.
You can switch between forward and reverse rotation with this switch.
正転 means rotation in the normal/forward direction, the direct opposite of 逆転's meaning of reversed rotation.
Compound of 正 (sei, 'correct' or 'normal') and 転 (ten, 'rotation' or 'turning').