Top Ten Frequently Asked Questions on Feeder Accuracy: An introduction to the principles and practices of bulk solids feeding

Feeder accuracy is a concern of any processor who has to control the flow of bulk solid material. This handy guide attempts to answer the most common questions surrounding the area of feeder accuracy, and should serve to form a working knowledge of the basics of continuous feeding.

While applications can range from the simple regulation of a single material to highly complex and sophisticated, multi-ingredient blending systems involving many feeders and processing lines, this discussion will limit its focus to individual feeder accuracy.

By combining a presentation of the principles of feeder accuracy along with the practical aspects of their application to real world process operation, it is hoped a more useful and rounded understanding is achieved.

Following lists the topics discussed:

  1. “How is feeder accuracy defined?”
  2. “How do I translate process requirements into feeder accuracy specifications?”
  3. “How do I decide whether to choose volumetric or gravimetric feeders?”
  4. “What factors determine the accuracy of a volumetric screw feeder?”
  5. “How does a loss-in-weight screw feeder work and what issues affect its ability to perform accurately?”
  6. “When should I choose a weigh belt feeder and what do I need to know about its performance potential?”
  7. “Compared to other process weighing applications how does a gravimetric feeder’s weighing system differ?”
  8. “How can the effects of shock and vibration be minimized in gravimetric feeder applications?”
  9. "How do I measure feeder accuracy in my plant?”
  10. “What are the most common feeder troubleshooting and maintenance issues?”

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