Improving Weighing Sorter Accuracy: Calibration of Ejector Response Time in the Pharmaceutical Industry
In pharmaceutical manufacturing, precision in packaging and sorting is essential for quality control. A crucial device in this process is the weighing sorter machine (checkweigher), which sorts products based on weight. The ejector response time calibration directly impacts sorting accuracy and overall product quality.
Role of Weighing Sorters in Pharma Packaging
Weighing sorters verify that each product or package meets strict weight specifications. Off-spec products are removed to prevent defective items from reaching customers, ensuring regulatory compliance and product safety.
What Is Ejector Response Time?
Ejector response time is the delay between detecting a defective product and activating the ejector (e.g., pneumatic arm or air blast) to remove it. Since products move continuously on the conveyor, precise timing is critical.
Poor calibration can cause:
Missed removal of defective products, risking quality issues
Unnecessary rejection of good products, increasing waste
Calibration Factors and Methods
Key factors influencing calibration include:
Conveyor speed: Faster lines need quicker ejector response
Product size and weight: Affects ejector force and timing
System latency: Sensor and actuator delays must be accounted for
Common calibration techniques:
Time delay adjustment: Fine-tune control system delays
Sensor synchronization: Align detection timing with ejector activation
Test runs: Perform sample cycles to validate timing accuracy
Benefits of Accurate Ejector Response Time Calibration
Higher sorting accuracy by removing only defective products
Reduced product waste from false rejects
Improved production efficiency with less downtime
Compliance with pharmaceutical quality standards
Conclusion
In pharmaceutical packaging lines, the weighing sorter is vital for ensuring product quality. Precise calibration of the ejector response time is critical for accurate, efficient sorting. Regular calibration and monitoring help pharmaceutical manufacturers reduce waste, maintain compliance, and safeguard patient safety.