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5.6.2 The Vacuum And Air System
The pump motor, vacuum, and compressor pumps do not
require lubrication.
6.0 Troubleshooting
The following guide will help you identify the causes and pro-
vide solutions for the most common operational problems of the
folder.
6.1 The Motors Will Not Start
There may be no power flowing to the machine. Make sure the
machine is connected to an active AC outlet of the appropriate
voltage and amperage. The folder requires a dedicated 115 volt,
15 amp, or 220 volt 10 amp line.
The folder circuit breaker may have activated (tripped). Turn off
the speed control. Let the circuit breaker cool down then push
the reset button.
CAUTION: If the circuit breaker trips again immedi-
ately, a more serious problem may be indicated.
Notify a qualified service technician.
One or more electrical components may be faulty. Have a quali-
fied technician check the electrical components. Also have the
technician check all wiring connections. The bearings may need
lubrication. Lubricated according to instructions in Section 5.6.
The folding motor belt may be loose or may not be adjusted
correctly. (See Section 5.2.6.)
6.2 Paper Will Not Feed
There may be a paper infeed problem. The sheet detector may
be set incorrectly, or may be worn. The sheet detector block
may be set incorrectly. See Sections 3.9 and 4.2.1. The timing
block spring may not be set correctly. See Section 5.2.3. The
bearing in the vacuum roller may be worn. The vacuum roller
should turn freely toward the folding rollers, but not backward.
Replace the bearing. The paper guides may be set incorrectly.
See Section 4.2.2. The air and vacuum settings may be incor-
rect. See Sections 4.1, 4.2.8, and 4.5. The guide fingers may be
set incorrectly. See Sections 3.10 and 5.2.2. The feed table
backstop is not set correctly, or is not in use. See Section 4.2.4.
The vacuum and air pump filters may be clogged. See Section
5.1.4. The paper may be excessively curled. Turn the paper over
on the feed table and check the setting of the guide fingers
according to instructions in Sections 3.10 and 5.2.2.
6.3 The Length Of Fold Varies
The feed speed during operation may not be the same speed at
which the machine was set up. See Sections 4.1, 4.2.3, and
4.2.7. Line voltage fluctuations may be occurring. See Section
5.5. The paper stop retaining screws on the bottom of the fold
tables may have come loose. Tighten both screws on the bottom
of the fold tables. The folding rollers may be contaminated. See
Section 5.1.3. The fold table strips may be binding. Check each
set of strips to make sure the sheet has clearance between the
strips and a smooth track to the paper stop.
6.4 The Paper Wrinkles
The vacuum may be set too high. Check the settings according
to instructions in Sections 4.1, 4.2.8, and 4.5. The guide fingers
may be set incorrectly. See Sections 3.10 and 5.2.2. The folding
rollers may be dirty or excessively worn. Clean according to
instructions in Section 5.1.3. After cleaning, rotate the hand
wheel slowly and observe the area between the folding rollers.
A gap between the first and second rollers on the right side may
indicate a need for angular control adjustment. See Sections
5.2.5 and 5.3.8. Gaps in any other location may indicate a need
to replace the folding rollers, the folding roller springs, or the
folding roller bearings.
6.5 Flecking
Flecking appears on the leading edge of the sheet as one or two
nicks in the paper. Flecking is caused by incorrect setting of the
sheet detector. Set the sheet detector according to instructions in
Sections 3.5, 3.9, and 4.2.1.
6.6 The Paper Jams Or Tears
See Section 5.4
Paper jams or tears may be caused by double sheeting. Double
sheeting may be caused by paper that is not correctly jogged,
ink that is not dry, incorrect setting of the sheet detector, or
incorrect setting of the speed, vacuum, or air. Jog the paper,
allow adequate drying time for inks. See Sections 3.5, 3.9, 4.1,
4.2.7, 4.2.8, 4.5. The folding rollers may be contaminated.
Clean the rollers according to instructions in Section 5.1.3. The
folding speed may be too high for the paper stock being folded.
Adjust the feed speed according to instructions in Section 4.2.7.
The stacking wheel assembly may be misadjusted. Adjust the
stacking wheel assembly according to instructions in Section
4.2.5. Paper may have wrapped around the perforating wheel.
Install the stripper wire as instructed in Section 4.4. The con-
veyor belts may not be turning. Check the belt shaft, the tension
springs, and the conveyor drive belt. Replace parts as needed.
The stacking wheel assembly may not be set properly. Set the
stacking wheel according to instructions is Section 4.2.5. The
paper guide rollers may not be set properly. Set the rollers
according to instructions in Section 5.2.4. The stacking wheels
may have seized. Check the stacking wheels and repair or
replace as needed.
6.7 Crooked Paper Folds
The paper may not be folding squarely. Adjust the fold table
paper stops according to instructions in Sections 4.2.3. Also see
Section 4.2.8. The folding rollers may be contaminated. Clean
the folding rollers according to instructions in Section 5.1.3.
Flecking may be occurring. Set the sheet detector according to
instructions in Sections 3.5, 3.9, and 4.2.1. The paper may not
be cut squarely/parallel. Recut the paper.
6.8 Marks On The Paper
The sheet detector may be set too low causing flecking. Reset
the sheet detector according to instructions in Sections 3.5, 3.9,
4.21. The folding rollers may be contaminated. Clean the rollers
according to instructions in Section 5.1.3. The guide fingers
may need to be readjusted. Adjust the fingers according to
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