Keep the knife and shoe sharp and in good alignment.  Full knife and poor adjustments lead to irregular cuts.  Knives should be carefully sharpened with a 35 degree bevel and finely honed (#32 micro cut or better) to remove coarseness and burrs.

Exercise care when handling and changing the knives.

Firm placement of paper against the left and back guides will ensure good corners.

Unusual noises and irregular action indicates a maintenance check is due.  Have the machine checked by a qualified person.

NEVER leave machine running unattended!