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.