Table of Contents
Advertisement
7.0 Knife Installation/Changing
•
Cut marks appear on the cut face of the paper.
•
The profile of the cut (side view) is not perpendicular to the table.
•
The cut does not appear straight when viewed from the top.
•
The knife makes a "rough" sound as it passes through paper.
•
Nicks are visible on the cutting edge of the knife.
7.3.2 Cutting Stick
A worn cutting stick can affect the cut quality of the bottom sheets. When this happens, the cut stick
can be rotated. Usually, the stick should be rotated one or two times between knife sharpening. Cut
sticks have a "wavy" shape to them and when rotated must be rotated a full 180° to keep a flat side
up. Each stick has 2 flat sides that can be used, after which it can be turned end to end, allowing the
2 flat sides to be used again, for a total of 4 positions per cut stick.
7.3.3 Bevel Angle
Challenge recommends that bevel angles for the Spartan 185 knives be 21°.
7.3.4 Helpful Suggestions
•
It may be helpful to own a "set" of knives. A set consists of 3 knives: one in the machine,
one as back up, and one at the grinder.
•
If the machine seems to strain but the cut quality is still good, reduce the pile height. You
may also carefully apply glycerin to the bevel when cutting hard, coated paper. Tie a cloth to
the end of a stick; dip the stick in glycerin, and apply. Never apply by hand! In lieu of
glycerin you may lightly rub white bar soap along the bevel. Lubrication will prolong the life of
your machine and reduce maintenance.
7.3.5 Knife Care
•
To prevent corrosion, knives are coated with light oil. It should be REMOVED WITH CARE.
•
While removing or installing a knife, be careful not to allow the edge to bump against the
machine. Nicks will result.
•
If a knife bolt is damaged, replace it.
•
Always keep knife bolts securely tightened.
•
Store knives in a dry environment to prevent corrosion.
•
Never attempt to hone, polish, or service the knife in any way.
26
Advertisement
Table of Contents
