Servo Drive Offers Integrated Control System

Micromech has helped a machine manufacturer who wished to create new market potential in the area of semi-automated individual augur fillers for dosing powders and granules. The manufacturer faced the problem that a solution incorporating a servo-driven dosing augur and separate PLC was far too expensive. It wanted a cost-effective modular solution for semi-automated systems as well as for fully automated dosing modules requiring integration into filling and flow-wrapping machines.

The manufacturer also demanded component reduction and a simple modular design. A servo-drive solution tailor made for the application offered a completely integrated control system meeting the requirements of IEC 61131-3 and PLCopen. This meant it was possible to eliminate external controllers and I/O modules and to reduce system costs. In addition, the process-focused control integrated into the drive allowed for faster response times of the mechanical shut-off slide and therefore delivers better precision.

It was found that running at 80 strokes per minute with a spread reduced by 0.2g resulted in more than 3,300kg of product being saved annually over a two-shift operation. By connecting an operating panel to the servo drive, the module could also be used as a standalone version.

Control via I/O or fieldbus options allowed for integration into complex machine structures and therefore this decentralised servo drive reduced costs and enhanced precision. In automatic high-performance filling systems the mechanical shut-off slide can be optionally replaced by a tubular plug-and-play linear motor actuator, which achieves more than 90 strokes per minute with high precision and maintenance-free operation.

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