MARTIN Engineering offers a family of responsive conveyor belt tracking systems that mitigate misalignment, rather than correcting it after the fact, even on reversing belts, to promote conveyor efficiency and safety. A mistracking belt can contact the mainframe, seriously damaging the belt and the structure, resulting in excessive spillage and even creating a potential fire hazard.

The Martin Tracker upper unit has guide rolls set 6mm from the belt for high precision when making adjustments.

Utilizing innovative multiple-pivot, torque- multiplying technology, the Martin Tracker detects slight misalignments initiated by unbalanced loads and fouled rollers, using the force of the belt to immediately adjust its position and realign the path. The trackers minimize risk and material loss, decreasing downtime and operating costs by reducing clean-up and equipment damage.

Rollers attached to the end of a sensing arm assembly ride both sides of the belt edge, detecting even slight variations in the belt path. Employing the force of the wandering belt, the arms automatically position a steering idler in the opposite direction of the misalignment. Transferring the motion to the steering idler through a unique parallel linkage requires less force to initiate the correction, so fine-tuning of the path can be continuous, active and precise.

Martin Engineering’s product manager Dan Marshall says, “The biggest issue from a mistracking belt is spillage. If the belt is out of place, it’s not handling the load properly and that will cause material to leave the belt. The build-up can be extremely rapid, especially from a high-speed conveyor, which drives up expenses due to wasted material and added clean-up. It also introduces the inherent risk which is always present when people are working around a moving conveyor.

“The other big issue is having an instantaneously responsive tracking system, because a misaligned belt can quickly drift over into the conveyor frame and begin abrading the belt and the structure,” Dan Marshall says. “If this isn’t caught right away, great lengths of valuable belting can be destroyed and the structural steel itself can be damaged.”

The multi-pivot design of the Martin system corrects many of the problems exhibited by current trainer systems on the market such as belt switches, vertical guides, v-idlers, crowned pulleys and sensing-roll trainers. Some correction systems have a tendency to overcompensate, requiring a safety tether or lead line to catch the device when the force of the misalignment detaches the unit from the mainframe. Many of these correct mistracking after it has occurred, rather than working to prevent it. By continuously mitigating tracking issues rather than reacting to them, the risk of failure is significantly reduced.

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