Advanced Tightening Strategies

Some manufacturers reduce the torque reaction of their tools by using advanced tightening strategies. The tightening strategy is one of the factors that impacts the maximum torque withstanding capabilities of the robot. These strategies control the speed, acceleration, torque progression and other parameters of the screw tightening process, all of which are significant to the maximum tightening torque that the robot can handle.

One example of this is Atlas Copco and their TurboTight strategy, in which the screwdriver controller reads joint stiffness feedback from the tool and based on this, regulates the speed of the tool such that it slows down at the exact time when the target torque is reached, almost completely eliminating the reaction force in the tool.