Service manual

3.0 Maintenance Guide
25
Problem Possible Cause Solution
6. Backgauge display is
inaccurate.
a) Backgauge accuracy needs
adjustment.
b) Encoder malfunction.
c) Faulty display circuit board.
a) See Section 3.4.2 Backgauge
Accuracy Adjustment, page 12.
b) Check encoder system (see
Section 3.4.11 Backgauge
Encoder/Belt Adjustment, page
21) or replace encoder.
c) Replace display circuit board.
7. Knife cuts deeper on one
side than the other.
a) Knife is not seated all the way
up in knife bar.
b) Knife level is not set properly
a) Loosen knife screws and use
knife lifter assembly to raise
knife up tight.
b) See Section 3.4.4 Knife
Leveling Adjustment, page 14.
8. The machine strains
through a cut.
a) Dull knife.
b) Paper clamped too tight.
c) Inadequate power source.
a) Change the knife with a new or
sharpened one. See
Operator’s Manual for knife
changing information and
instructions.
b) Apply less force on clamp
handle when clamping paper.
c) The electrical outlet may not
have sufficient power if other
equipment is operating on the
same line. Check voltage
and/or try another outlet on a
different line.
9. Concave cutting – ends
wide, center narrow.
a) Excessive moisture at edges
of paper.
a) Keep paper in dry location.
10. Concave cutting –
variation from top to
bottom.
a) Soft paper not firmly clamped.
b) Knife dull or incorrectly
ground.
a) Apply more force on clamp
handle when clamping.
b) Change the knife with a new or
sharpened one. See
Operator’s Manual for knife
changing information and
instructions.
11. Motor runs at start up
and does not stop
running.
a) Knife up limit switch out of
adjustment.
a) See Section 3.4.9 Knife Up
Limit Switch Adjustment, page
19
12. Knife coasts after motor
stops.
a) Motor brake is disengaged.
b) Motor brake is worn out.
a) Engage motor brake (see
Section 3.4.12 Re-engaging
the Knife Pull-Down Gear,
page 22.
b) Replace motor brake. See
Section 4.14 page 50 for part
number. Replacement
instructions included with part.