Conair SC-5 SURE CUT?, What Is The, Mechanical Features, Flywheel, Planetary Gear Reducer

WHAT IS THE

SC-5 SURE CUT?

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The Conair SC-5 Sure Cut Series rotary knife cutter has been designed to be “The most versatile cutter of the industry”.

With both capacity to cut small parts at high speeds or large tubes or profiles at low speeds this cutter can eliminate the need for moving cutters in and out of a line per application.

Today with custom profile houses potentially running 2-3 dif- ferent profiles on one line in a given day, time is at a premi- um. Having to move different cutters in and out of line is no longer acceptable when time is money.

Mechanical Features

This series of servo rotary knife cutters use a 24 inch diameter flywheel optimizing surface speed and power. This is in fact the largest diameter wheel which could be used while still allowing it’s mounting under the bushing holder.

Flywheel

With a 24 inch diameter flywheel which is 1inch thick, many benefits become available.

Planetary Gear Reducer

A 10:1 in-line servo motor rated planetary gear reducer with 7 arc-minutes maximum backlash is mounted directly to a 3000 rpm brushless servomotor. A top flywheel speed of 300 rpm is realized. Even though the flywheel appears to be moving slowly, the actual surface speed at the blade at only 300 RPM’s is over 0.438 inch per millisecond. That’s twice the surface speed of a typical clutch brake cutter.

Instead of mounting the cutter head directly to the servo motor shaft, which is generally not designed for high radial load or axial load due to small shaft diameters, the 24 inch flywheel is mounted to the planetary gear reducer shaft which is designed for just this type of application. At the gear ratio and output speeds which this cutter was designed, radial load on the out- put shaft of the reducer is in excess of 1000 lbs where the servo motor shaft may only be 100 lbs or less. Potential wear on the servo motor shaft bearings is minimized.

The high speed\low torque power of the servo motor is effi- ciently converted into a low RPM\high surface speed\high torque power more suitable for cutting applications.

2-2 DESCRIPTION SC-5 SURE CUT Servo Knife Cutter UGE059/1003