Schunk MWPG 20 miniature changing parallel grippers widen micro-assembly possibilities
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Schunk's quick-change miniature parallel gripper with standardised DIN interfaces has an outside diameter less than 20 mm. Optical monitoring, a large through-hole and a large range of accessories make its MWPG 20 miniature gripper an all-rounder, says the company.
The Schunk MWPG 20 is made of stainless steel and weighs 26 g. To avoid frictional loss due to mechanical deflection, two horizontally positioned piston areas provide the jaw drive. The jaw motion is mechanically synchronised via a special ring system. On request, if one of the two fingers should be fixed for example, a forced coupling will not be necessary. Free of scope, smoothly running cylinder pins provide jaw guidance so gripping forces up to 5 N with an adjustable stroke of up to 1 mm per finger are possible.
Schunk's solution for ensuring continuous monitoring of the MWPG 20 gripper fingers is based an optical sensor located inside the changing head, making feed-through of the signal from the gripper to the head no longer necessary. Moreover, the MWPG 20 incorporates a central 7 mm diameter through-hole that can be used for feeding components, monitoring with a machine vision system or for laser welding. In case of a sudden energy drop, an externally fitted spring ensures gripping force is maintained.
The MWPG 20 can be directly mounted to the robot-sided head of the Schunk MWS 20 miniature changing system and adapter plates are not needed. Compressed air is supplied via two direct hose-free connections. The matching MWM changing rack, which is used for organising, facilitates a quick automatic change of tools and grippers.
