Courtoy offers two alternative principles for automatic tablet weight control and adjustment, depending on the application and machine type selected.
The "force control" principle is based on measurement of final compression force under constant tablet thickness. This principle is used for all heavy duty applications where tablet weight accuracy and constant tablet density are less critical.
The "displacement control" principle is based on measurement of thickness variations under constant force. This principle is inherently more accurate then any force control system and is therefore used in all pharmaceutical applications and in industrial applications where constant density of the produced tablets is critical.
Based on the measured signal - compression force or displacement - the weight control system will automatically adjust the fill depth to keep the tablet weight within specified tolerance limits.