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This content was submitted directly to this Web site by the supplier.Article | July 24, 2014
Schunk: Compact short-stroke axis for dynamic assembly applications
Schunk has combined a powerful linear motor drive with an ultra-smooth pre-loaded roller guide for its ELB linear axis and is desig-ned for precise and dynamic strokes.
The result is an extremely compact, rigid and dynamic module which is able to position high loads with excellent repeat accuracy of 0.01 mm. The maximum acceleration is 100 ms-2 and the maximum speed is 4 ms-1.
Since the driving force (maximum: 150 N) is transmitted directly and without gears to the slide by the play-free junction roller guide, the operators benefit from the outstanding precision, extremely short cycle times as well as high productivity and process stability especially in the case of demanding joining and placement processes.
The module comes in three stroke versions: 50 mm, 75 mm and 125 mm. As an option, it can be equipped with an incremental stroke measuring system (sine/cosine interface) or with an absolute displacement encoder (Hiperface or SSI interface). An absolute-value transducer eliminates the need for complex reference runs when starting up the plant and after emergency stops. In addition, the module doesn’t need end or reference sensors, reducing investment costs, programming work and the number of cables in the cable set.
The unit is controlled either by the Bosch Rexroth IndraDrive controller or by the Siemens SINAMICS inverter. By using standard controller interfaces the module can be quickly and easily integrated into higher-level control systems. As an option, the short-stroke axis can be equipped with a pneumatic load-balancing system or with a holding brake for use as a Z axis. Due to a standardized mounting pattern, it can be combined directly with numerous Schunk modules. The pneumatic LM 100 linear module by Schunk can be replaced 1:1 by the Schunk linear motor axis ELB, increasing flexibility.
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