AMERICAN SANDERS TECHNOLOGY Apollo 8 Operator's Manual
Page 13
Chatter Wave Prevention
American Sanders are designed and manufactured to the
most rigid tolerances. However, after a finishing cut it is
possible to see “chatter” or “waves”.
The best guarantee to remove the chatter is to finish the floor
with a rotating horizontal sander, such as American Sanders
Technology’s Sander 16.
To minimize chatter when using a belt or drum sander the
following steps should be taken:
1.
DRUM MARKS...are caused by the operator lowering the
drum to the floor without forward traverse. These marks
should be removed by cutting at a 45 degree angle to the
mark. Cutting at the mark while maintaining the same
path will only increase the mark depth and width.
See figure #10.
2. UNEVEN WALKING SPACE...can leave lengthy “waves”.
The machine cuts more material during the slower pace.
Pay particular attention to a steady, even pace.
3. EXCESSIVE LIGHT CUTS...may reveal high spots on the
paper/contact wheel and cause chatter. Take a heavier
cut and increase the pace.
4. DEBRIS...lodged between the paper and the drum will
leave chatter. On a belt sander, debris may be adhered
to the drum. Insure the drum is clean and free of debris
before placing the paper on.
5. ABRASIVE QUALITY...may vary. Belt seams can be
thicker on low quality paper and cause chatter. Use only
American Sanders Technology specified sandpaper.
Store abrasive according to manufacturers recommen-
dation.
PROPER CARE OF YOUR MACHINE CAN MINIMIZE
CHATTER AND WAVES.
1. V-BELTS...can cause vibration and chatter if they are of
low quality. Use only belts specified by American
Sanders Technology.
2. TRUCK AND CASTER WHEELS...with flat spots, out-of-
roundness, or debris adhered to their surface can cause
“waves” or a “chatter effect”. Always clean and inspect
all wheels before starting to sand, and before the finish
cut. Replace or true the wheels if found to be out-of-
round. Never allow the sander to stand on hard
surfaces for lengthy periods of time.
3. DUST PICK-UP SHOES...may need adjusted differently
for different materials that are to be sanded. An improp-
erly adjusted shoe will leave trailing debris that will be
run over by the wheels and cause “random waves”.
4. CONTACT WHEELS (DRUMS)...may be out-of-round and
cause “chatter”. Contact your American Sanders
Technology dealer for assistance to true or replace the
drum.
Figure 10
5. BEARINGS...in the motor, drum, or fan system
may become worn and induce vibration which
could cause “chatter”.
6. PULLEYS...that are damaged or severly worn can
induce vibration and cause “chatter”. Contact your
American Sanders Technology dealer for assis-
tance.
7. SANDPAPER TENSION...should always be
released when the machine is shut off for 10
minutes or longer to avoid compression of the
drum.
NOTE: American Sanders Technology is not
responsibile for rework of floors that are
unacceptable to the customer. It is your
responsibility to insure your equipment is in
proper operating order, and that you use the
right machine for the job.
