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Article | August 7, 2013
Festo: Cylinder/drive combination
Festo’s EPCO electric cylinder and CMMO-ST closed loop servo drive combination is designed to quickly assist in machine changeover, while delivering low total lifecycle costs through minimum energy consumption, and streamlined selecting, commissioning, and installing.
The EPCO electric cylinder, offered in 16, 25, and 40 mm sizes with multiple mounting configurations, is capable of moving to any position within its stroke limit with a repetition accuracy of 0.02 millimeters, producing flexible, fast, and reliable product changeovers. In conjunction with the CMMO-ST drive, the EPCO can be easily commissioned to move to any of 31 preconfigured records. These 31 records can be positioning, velocity, or force tasks, and can be sequenced in any order. The CMMO-ST drive can be commissioned via the internet. OEMs or end-users simply connect to the drive via its IP address and download the parameter set for the specific hardware. Parameter sets are available on the software CD that accompanies the drive. Set updates are available online. Following download of parameter sets, engineers “home” the drive and configure or teach up to seven positioning tasks, including velocity and acceleration. Additional drive functionality is available when the CMMO-ST is commissioned via the Festo Configuration Tool. This tool is available at no cost and can be downloaded from the Festo website.For applications where safety is a concern, the CMMO-ST includes Safe Torque Off (STO) and is rated for Category 3 / PL d. When fieldbus communication is needed, OEMs should use the CMMS-ST Drive (closed loop drive known as ServoLite) with the EPCO. The CMMO-ST uses digital I/O for communication.
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