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Article | August 13, 2012
Bosch Rexroth Corp.: Linear motion system
Rexroth's Omega Module linear motion system adds more capability to the EasyHandling modular system, allowing higher dynamics over longer distances in feed units, by combing low traveling mass and fast belt drive, so that top speeds can be reached.
The belt drive is fixed to both ends of the main body and is looped around the drive shaft of the table part in the shape of the Greek letter "Ω", reducing the module's mass considerably compared to ball screw assemblies, thereby making it highly dynamic. By guiding the module's table part over ball rail systems, the module achieves a high degree of rigidity for precise movements.
Because the drive is stationary, the linear system can be set up in any position in addition to being used as a vertical axis. A pneumatic clamping element maintains the position at standstill and also clamps hanging loads.
As a single axis system, the Omega Module comes with the necessary mechanical and electrical interfaces to fit with the modular Rexroth EasyHandling system. The system’s standard Easy-2-Combine form-fit connection method can speed assembly and reduce up-front engineering time, even in multi-axis systems. In addition, it simplifies the direct attachment of pneumatic grippers and rotary modules, or other end-of-arm tooling.
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One of the special features of EasyHandling is that it allows for fast start-up. With the EasyWizard commissioning tool, only a handful of axis-specific data needs to be entered, which helps to reduce start-up time to just a few minutes. As a single-axis system, the Omega Module is suitable for assembly and handling applications or in other automation tasks.
The Omega Module comes in three sizes to handle a variety of performance requirements. With a stationary main body, users can specify custom lengths up to 5,500 mm and choose from main bodies (frames) with widths of 55, 85 or 120 mm. This set-up allows for several carriages with their own drive to be operated independently from each other. The system features matching drives, motors and controllers. In the largest size, the mechanics are designed for input torques up to 154Nm. With high acceleration speeds of up to 50m/s² and speeds of up to 5m/s, it opens up the door for reduced cycle times even for longer movements.
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