Importance

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Abstract

A torque fastening system and method for applying torque to secure a fastener, includes actuating a torque tool to provide an initial command torque value to the servo drive of an electric motor for applying torque to a fastener. The initial command torque value is less than a target command torque value corresponding to a desired maximum target torque value entered by an operator. The torque fastening system operates at the initial command torque value to rotate a threaded fastener. Thereafter, in response to a spike in torque that corresponds to a decrease in motor speed, the torque tool output changes from the initial command torque value to a jump command torque value having a greater power value to increase torque applied by the torque tool to a fastener. The command torque value is ramped from the jump command torque value toward the target command torque value to increase the torque provided by the torque tool.

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First Claim