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4 Key System Features That Will Drastically Improve Grinder Throughput


We kicked off 2022 with an overview of how the CBI 6800CT stacked up against the competition in the regrind arena … and it was impressively well. The 6800’s engineering allows it to routinely churn out an eye-popping 5-600 yds./hr.


In summary, the 6800CT’s extreme, solid rotor weight; 3-400 higher mill RPMs, revolutionary anvil placement and a 15%-larger screening area; and reduced drag due to lack of rakers combine to deliver the Holy Grail of any grinding operation: soaring production rates.


However, the key to your CBI’s impressive efficiency does not stop there. The machine’s operating system and MD4 display are an important complement to its unique engineering. The MD4 display is the portal to CBI’s automated, throughput performance feature—the Dynamic Feed Control System, which maximizes throughput by matching peak engine and rotor performance.


The system works to maintain a V12, 4-turbo engine in the 1,750- to 1,900-RPM power-band, sweet spot. It optimizes bed-chain and top-feed-roll speeds, depending on feedstock. Hydraulic pressure is also monitored and controlled. When too high, feed chains reverse to relieve any overpressure, thereby preventing hose and seal blowouts.


The four components to the Dynamic Feed Control System include:


  1. The Load Sense Trip Setpoint: Load sense is one of the most important features for throughput performance. When engine speed falls below a certain RPM—around 1,700 RPM—this feature stops the feed system and prevents additional material entering the rotor, ultimately ensuring the engine does not stall under extreme loading conditions. [It can only be disabled by entering service mode.]

  2. The Load Sense Recover Setpoint: Is an engine setpoint that enables the feed system to automatically resume feeding after being paused by the Load Sense Trip Point feature.

  3. The Feed Reverse Setpoint: An additional protection feature that kicks in if the Load Sense Trip Setpoint (LSTS)—recovery phase determined by a user-configured amount of time—is not enough. In these situations, the Feed Reverse Setpoint—usually kicks in around 1,600 RPM—supports the LSTS by allowing additional recovery time for the material bogging down the engine to exit the rotor and preventing that material from catching fire.

  4. IntelliGrind™: This selectable feature increases throughput by managing Load Sense and Feed Reverse pulsing. The less times the feed chains are stopped, the higher the productivity. Note: Most operators rely upon this critical feature to maintain peak throughput. (IntelliGrind is a key, control feature. We will get into more detail on how to best utilize in next month’s email.)


One final caveat on optimizing throughput and getting the most out of your machine investment is to also consider and manage the following mechanical variables:


  1. Feedstock

  2. Tip size

  3. Tip wear

  4. Screen size

  5. Maintenance schedule


Mismanagement of your CBI grinder’s operating system will drastically reduce performance. Feel free to contact your Columbus Equipment Company Material Processing Division’s representative, service technician or PSSR anytime to make sure you’re ahead of—and not behind—your competition’s production curve.

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