the fast, precision control co-ordinates two servo motors which are responsible for the wire feed and the movement of the control shaft. several operating modes for compression, forming and extruded spring production roun......the fast, precision control co-ordinates two servo motors which are responsible for the wire feed and the movement of the control shaft. several operating modes for compression, forming and extruded spring production round off the versatility of this series. the wire feed length can be changed during production.