GRAVIMASTER

The GRAVIMASTER 231 controls the throughput of an extruder or a feeder screw. It uses gravimetric throughput measure ment with the aid of a weigh-hopper to precisely set the throughput of an extruder. The throughput measurement method is based on loss-in-weight measurement over a time interval. The GRAVIMASTER 231 supplies the weigh-hopper and in turn records the weight signal, even over a greater distance with little interference. The GRAVIMASTER 231 is characterized by a clear and easy-to-operate user interface. A special feature of this operation is that the extruder can be started up via the speed and gravimetric control can be ac tivated at the operating point. This means that everything is still under manual control when starting up the system and can be operated by a modern touch display.

The GRAVIMASTER 321 is designed to operate an extrusion line with weight-per-meter control. It can control up to two ext ruders and one haul-off. The GRAVImaster 321 can be integrated into existing automation systems and use processing machine signals. Important values and ratios for production can be taken from the user interface. The entire line can be changed to a new working value via the master value. This is particularly helpful when starting up the line by starting the motors individually and then accelerating all of them proportionally to the production speed. Both GRAVIMASTER controls use Siemens S7 technology and offer numerous diagnostic options and trend displays. The use of the latest technology and interfaces allows extensions and the implementation of specific customer requirements at any time. This also includes the networking of several GRAVIMASTER 321 controls with associated visualization via the WinCC.