KolverUSA (Westford, MA) offers the torque location sensor arm, an intelligent system that ensures every screw in an assembly is in the correct location at the right torque. Assembly sequences and X-Y coordinates are programmed with user-interface screens through the keypad. Torque programs are automatically selected and enabled from the screwdriver controller based on the arm locations and current sequence step. This telescoping arm provides the operator full flexibility on the assembly line. Made of carbon fiber, the arm collapses like a telescope. No PC is required.
The arm consists of a torque reaction arm with an encoder mounted at the pivot point, and with a linear metering resistor. The encoder records the angles and the linear resistor records the distance. A control box converts the angle counts of the encoder and the distance detected by the resistor to the X-Y position of the screwdriver. X-Y accuracy can be set by the operator according to each application. Any electric screwdriver with remote start/stop capability can be connected and controlled by the controller. The system is programmed by moving the screwdriver to the desired location and pushing the OK button. Common features of the arm include recording the number of pieces, number of screws per piece, sequence of screws, and the position of the screws, such as their length and angle.
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