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Promess, Inc. has introduced a new line of lightweight press systems intended for use as end effectors in robotic assembly applications. The L-Series Robot Presses weigh up to 51 percent less than first generation Promess Robot Presses and will initially be available in sizes up to 50 kN capacities offering a 200 mm stroke and 300 mm/sec speed.

“We made a number of changes to the traditional EMAP design to achieve our weight reduction goals,” said Promess mechanical engineer, Matt Rall. “The housings are aluminum and we replaced the original keyways with a new splined shaft system. The spline and nut are hardened steel and the system has been tested successfully through millions of cycles. The mounting interfaces are steel and are compatible with either a removable flange or robot mounting systems.”

L-Series Robot Presses also feature a lubrication system that allows automatic greasing of the ball nut. The press design reduces system downtime for lubrication from minutes to seconds and facilitating completely automatic greasing cycles.

The units also feature second-generation servo-motors that provide increased torque in smaller frame size units, further reducing the weight of the L-Series Robot Presses. They are equipped with absolute encoders for position sensing and require no proximity switches. Only three cables are required between the press and the controller: one for the load cell, one for motor power and a third for data feedback.

Promess Robot Presses are intended for use in flexible assembly cells where the process requires that the press be brought to the part rather than bringing the part to the press. In operation the press is positioned on the part by the robot and the tooling engaged. Press motions are fully programmable and the presses are equipped with force and position sensors to support intelligent assembly operations.