MAXSON AUTOMATIC MACHINERY COMPANY (Westerly RI USA) offers an automatic squaring system on its stationary bed knife cutters, or as a retrofit to existing sheeting equipment, relieving the Operator of making that adjustment when setting the cut off. The design insures accurate, repeatable positioning is maintained.

An AC servomotor, mounted on a gear head, is coupled to a fine threaded screw. The servomotor is governed by a microprocessor, which mathematically calculates the squareness for the cutoff setting. The servomotor turns the screw, positioning the cutter head accordingly. Sensors set for the minimum and maximum cut off range prevent over travel.

Squareness within +0.020” (0.508 mm) is maintained. A manual over ride switch permits the Operator to set the sheet squareness and when returned to automatic mode assigns the manual setting to memory for the given sheet length.