Tablet Carousel: Automated Quality Control in Pharmaceutical Manufacturing

What Is a Tablet Carousel?

A tablet carousel (or rotary tablet inspection system) is an automated in-line device that performs 100% inspection of compressed tablets during high-speed production.

How It Works

1. Feeding: Tablets from press discharge into carousel pockets (dedicated cavities on rotating disc).
2. Transport: Carousel rotates at synchronized speed (up to 1M+ tablets/hr).
3. Inspection Stations (per pocket):
   • Weight: Precision load cell (electromagnetic force restoration) – rejects ±5% outliers.
   • Dimensions: Laser/optical micrometers – thickness, diameter, length.
   • Visual defects: High-res cameras + AI – chips, cracks, spots, color variation, embossing clarity.
   • Hardness/friability (optional): Integrated tester on sample or 100%.
4. Rejection: Defective tablets ejected via air jet/mechanical flipper into reject chute.
5. Data Logging: Real-time statistics, trend charts, SPC alerts, 21 CFR Part 11 compliance.

Integration

• Downstream of tablet press; upstream of coating, packaging.
• Interfaces with MES/SCADA for batch records, OEE.
• Can trigger press adjustments (weight control loop).

Benefits

• Eliminates manual sampling bias.
• Detects rare defects (ppm level).
• Reduces waste, rework, recall risk.
• Regulatory expectation for continuous manufacturing.