GCC Technologies Elite XL-20/600 User Manual page 167

Parallelism: The amount by which the ends of two vertical and two horizontal lines
can be greater or farther apart than the other ends. Measured with vertical lines of
390 mm (15.35 inch) and horizontal lines 245 mm (9.65 inch). These lines are
arranged to form a rectangle on the page.
Linearity: The amount that three straight lines (horizontal, vertical, and diagonal)
can vary from being truly straight. One end of each of the horizontal and vertical
lines meet at a corner; the diagonal line is at 45 degrees to the other two lines and
passes close to the center of the paper. The horizontal line is 190 mm (7.48 inch), the
vertical line is 234 mm (9.21 inch), and the diagonal line is 269 mm (10.6 inch). The
amount is measured by the distance a line can vary from the position of a true
straight line.
Perpendicularity: The amount one end of a 195 mm (7.7 inch) vertical line can
vary from true perpendicular.
A-4
Within 2.0 mm (0.079 inch) horizontal or vertical either way
Within 0.7 mm (0.028 inch) either side, horizontal line
Within 1.0 mm (0.039 inch) either side, vertical line
Within 1.5 mm (0.069 inch) either side, diagonal line
Within 1.3 mm (0.051 inch) either side of true vertical