PLOTTING DEVICE AND METHOD FOR MOUNTING BALANCING WEIGHT

摘要

PROBLEM TO BE SOLVED: To provide a plotting device which obviates the generation of force vibration by the unbalance of centrifugal force at the time of rotation and a method for mounting balancing weights. SOLUTION: Annular grooves 6 are formed on both end faces of a rotationally driven recording drum and two pieces of the balancing weights 7 are respectively disposed within these annular grooves 6. The balancing weights 7 consist of magnets and are attracted by these magnets to the end faces of the recording drum 1. Respectively two pieces of the balancing weights 7 are arranged with the prescribed mounting angles so as to negate the unbalance force by the centrifugal force of a machine plate 2, a moving clamp 5, etc. The positions of the two balancing weights 7 are regulated and the force vibration of the recording drum is suppressed at very time the size and mass of the machine plate 2 vary.