Abstract
Helical synchronous belt drives are more effective than conventional synchronous belt drives with respect to reducing noise and transmission error per single pitch of the pulley. In the present study, when transmitted torque acted, the transmission error in helical synchronous belt drives under the pulley speed ratio of 1:1 was investigated both theoretically and experimentally for the case where the pulley was rotated in bidirectional operation. The computed transmission error agrees well with the experimental results, thereby confirming the applicability of the proposed theoretical analysis for transmission error in bidirectional operation. This transmission error was found to be generated by a change in the belt tension when transmitted torque acted, by a change in the state of contact between the belt and pulley teeth, and by the difference in axial belt movement between the driving and driven sides. In addition, the transmission error is reduced when the outside diameter on the driving pulley is larger than that on the driven pulley and the installation tension is set appropriately.
