Dynamic Rotary Module for Electronics Assembly

15 February 2013

In the assembly of small parts, dynamics, compactness, precision and reliability are essential. The ERD from SCHUNK is an unprecedented rotary module that has been developed for assembly applications in the electronics, consumer goods and pharmaceutical industries.

The endless rotating miniature module is equipped with two integrated air feed-through's, four electric feed-through's and one SIL2-certified absolute encoder measurement system. The new module enables the implementation of space-saving with high-torque, high-speed assembly systems that also comply with the highest of standards to meet Machine Directives.

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. Additionally, with the optimized air feed-through systems, pneumatic actuators connected to the module can be actuated at greater speeds. 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. Furthermore, the repeat accuracy is improved with a specified value of 0.01°. A large number of 'pairs of poles' ensure the module from the innovative family-owned company generates a high nominal torque of up to 1.2Nm even at low speeds.

The fact that the module has almost no wear generating parts results in a very long lifecycle. As for the controller, either a Bosch-Rexroth IndraDrive CS or Bosch-Rexroth IndraDrive Advanced drive controller 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 1.2Nm. As an option, the modules comply with protection class IP40 or IP54.