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Gear boxes deliver on line of stretch wrappers

Compact, smooth-running, and capable of being integrated into this OEM’s stretch wrappers in a variety of orientations, SE Encore right-angle speed reducers have become a go-to standard.

The location of the three speed reducers are highlighted.
The location of the three speed reducers are highlighted.

Wulftec is a well-known maker of stretch wrappers, including rotary arm, turntable, and orbital formats. Each of these machines relies on AC motors from Baldor and SE Encore speed-reducers from Winsmith. Based on inputs from a Rockwell CompactLogix controller and Rockwell PowerFlex 525 inverters, the Baldor motors are responsible for actuation. In the Model WCRT-200 machine shown here, which is capable of wrapping up to 150 loads/hr, this includes such things as lifting the film carriage, or causing the rotary arm to move, or causing the discharge conveyor to discharge a freshly wrapped pallet load. But while the motors are the source of actuation, the Winsmith speed reducers—often referred to as gear boxes—play a crucial role. By reducing the speed at which the motors rotate, they increase available torque.

“It means that a small motor running at a high speed is able to drive something very heavy at a slow speed because of the gear box ratio,” says Guy Lopes, Director of Operations at Wulftec. “After reducing the motor’s speed, the gear box drives a pinion, and the pinion drives a gear connected to the arm we want to rotate or the film carriage we want to raise and lower.”

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