Gripping Systems

Dynamic rotary module for electronics assembly

12-04-2012 - In the assembly of small parts, dynamics, compactness, precision and reliability are essential. The ERD from SCHUNK is an unprecedented rotary module that was particularly designed for assembly applications in the electronics, consumer goods and pharmaceutical industries; the endless rotating miniature module is equipped with two integrated air feed-throughs, four electric feed-throughs and one SIL2-certified absolute encoder measurement system. The new module enables implementation of space-saving, high-torque, high-speed assembly systems that also comply with the high standards of the Machine Directive.


The rotary module from the competence leader for clamping technology and gripping systems is driven by a brushless synchronous motor with permanent excitation. Its special geometry ensures high dynamics and acceleration. Also, due to the optimized air feed-throughs, pneumatic actuators connected to the module can be actuated more quickly. These two combined factors ensure short cycle times and high productivity. The absolute encoder measurement system eliminates the need for time-consuming reference runs during startup and after an emergency shut-down; also, the repeat accuracy is improved, with a specified value of 0.01°. A large number of pairs of poles ensure that the module from the innovative family-owned company generates a high nominal torque of up to 1.2 Nm even at low speeds. The fact that the module has almost no wear parts results in a very long lifetime. As the controller, either Bosch-Rexroth IndraDrive CS or Bosch-Rexroth IndraDrive Advanced drive controllers can be used. The ERD module is available in sizes 04, 08 and 12; these designations also correspond to the respective nominal torque of 0.4, 0.8 or 1.2 Nm. On option, the modules comply with protection class IP40 or IP54.

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