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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The 6-axis version of the R17HS high speed variant of the R17 robot is now available. As is our policy the 6th axis is an optional bolt-on module. At the same time we have made it even faster and new software eliminates shake and greatly improves repeatability as this video shows. Please see https://www.youtube.com/watch?v=3wG0MeiJ-yE. The video would seem to imply a repeatability of 0.01mm but we are sticking with 0.2mm in the spec. The motor specialist was able to tune the motors from the other side of the pond. My first reaction when we put power on and entered the first commands was to jump back in amazement (and maybe an expletive). Tip speed is now 3m/s; that's 3 times as fast as its nearest competitor yet costs half the price. I love it when a plan comes together.