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Schunk Launches New AGE-F Automation Compensation Unit

Story added 25 August 2010.

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Even if deviations in position and tolerances of robots and workpieces have to be compensated, Schunk offers a vast product portfolio of compensation units to help the robot avoid malfunctions and damages to the tooling or part and assure improved efficiency and process reliability. Product development in this area has noted the introduction of a number of new products from the German automation and workholding specialist.

Depending on the size of the AGE-F compensation unit, it can balance planar off-sets between ±1.5 and ± 5mm without twisting or tilting the workpiece. By means of three different springs per size, the flexibility of the unit is defined. With an adjustment screw, the springs are pre-loaded and forces are fine-tuned. This enables the unit to be flexibly adjusted to the various applications - a decisive advantage towards pneumatic compensation units, which usually can be adjusted as ‘soft’ or ‘rigid’.

Since the AGE-F works mechanically without any pneumatic elements, it is very flat and particularly suitable for applications in narrow machining areas. Instead of sliding guides, it is equipped with smoothly running roll guides. This allows the use of longer gripper fingers and an assembly that is almost twice as high. Since roll guides are used, the unit will always work with exceptional precision. It even compensates for the smallest compensation forces without the ‘stick-slip effect’. Spring-actuated resetting pistons center the unit automatically at a repeat accuracy of 0.003mm.

For robot fastening the AGE-F is equipped with an ISO flange mounting interface. This enables the mounting of the PGN-plus and PZN-plus units. Two teachable magnetic proximity switches allow monitoring of deflections in X and Y direction at two positions each.

Compensation in three directions with elastomer components

The Schunk TCU compensation unit has base plates that are connected with elastomer pads. This enables the TCU units to compensate in X, Y and Z-direction and corrects angular errors to result in a rotational compensation. An optional pneumatic locking device is available so the compensation unit can be rigidly connected and vibration of the tool or gripper can be prevented while the robot arm is moving. The TCU compensation unit is designed for the Schunk PGN-plus and PZN-plus grippers, but also for the JGP and JGZ units. The compensation paths in the X, Y and Z-direction are 0.4 to 1mm, depending on the size with compensation angles of between 1 and 3°.

Precisely defined compensation with stable clamping

For fast and precise assembly, palletizing or insertion of workpieces at constant positioning points the new Schunk AGE-K compensation and adjustment units are the product of choice. The positions of these units are mechanically adjusted via a spindle drive and are then clamped. Without swinging or snapping back, the unit holds the defined position steady and moves in that direction. The compensation stroke in X and Y direction amounts to +/-4 or +/-5mm, depending on the size of the unit. Smoothly running cross roller guidance also allows a permenently precise function of the unit. With the ISO flange mounting interface, the unit can be fastened on the robot. The gripper types PGN-plus 64 to 125 and PZN-plus 64 to 125 can be mounted directly. For further details on any of these products, please contact your local Schunk representative.

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