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trouble shooting
TROUBL ESHOOTING
Even though the finest materials and precision
workmanship have been incorporated into your Craftsman
saw, it is reasonable to expect some wear after long periods
of use. Adjustment facilities have been built into the saw to
compensate for this wear. Looseness due to wear, rough
handling, or improper adjustments will usually be indicated
by reduced accuracy or the inability of the saw to perform
as intended. The usual operating "troubles" are listed in the
following paragraphs with the necessary corrections
described and illustrated.
1. LOOSENESS OF COLUMN TUBE IN COLUMN
SUPPORT -- ELEVATION CRANK OPERATES
ROUGHLY, OR CHATTERS WHEN ROTATED.
When this condition exists, square crosscuts are likely
to be difficult to make and repeated cuts inaccurate.
Adjust the column tube key as follows:
a. Checking for Looseness of Column Tube in
Column Support.
(1) Tighten arm latch handle.
(2) Grasp the arm latch handle with one hand and
hold fingers of other hand at parting line
between column tube and column support.
(See figure 60.)
(3) Apply gentle side force to the radial arm in
opposing directions. Any looseness between
column and column support (indicated by
arrow in figure 60) can be felt with fingers.
(4) If looseness can be felt, perform the following
operations:
NOTE: Before attempting to adjust the column
tube key, the function of this adjustment should
be understood. Figure 61 shows a sectional view
through the column tube support (looking
downward) at the column tube key location. By
loosening the left-hand set screw and tightening
2.
the right-hand set screw the column tube key will
be forced tighter into the column tube keyway.
Conversely, loosening the right-hand set screw
and tightening the left-hand set screw, will
retract the column key out of the column tube
keyway. The set screw in outer end of column
tube key must be loosened while adjustment is
being made and tightened with medium firmness
after the adjustment has been completed. This
screw applies pressure on the nylon friction plug
and provides smoother elevation movement of
column tube. This set screw should be tightened
to provide maximum smoothness of operation.
Right and left positions are given with operator
facing the saw - standing in front of saw table.
b. Adjusting Column Tube Key
(1) Loosen the set screw in center of column tube
key. (See figure 61.)
[2) Loosen the left-hand set screw 1/4 turn.
(3) Tighten right hand set screw until looseness
between column and column support is
eliminated. Turn elevation crank to raise radial
arm, if saw elevates too hard, loosen right hand
_t screw slightly and again check elevation and
column tube for looseness. When correct,
tighten left hand set screw.
(4) Tighten set screw in center of column tube key.
E}evate and lower arm and if chatter or rough
elevation exists, tighten set screw until
srnootbest operation is obtained.
(5) Turn elevation crank to raise and lower radial
arm. If too tight, loosen right hand set screw
slightly and check again for smooth operation.
When correct, tighten left hand set screw.
{6) Tighten the set screw in center of column tube
key (figure 61) until smoothest operation is
obtained.
BLADE DOES NOT MAKE SQUARE CUTS AND
ACCURATE REPEAT CUTS CANNOT BE MADE.
If this condition exists the trouble might be due to
one, or a combination of, the following conditions.
a. Looseness between column tube and column
support.
Adjust as described in preceding paragraph 1, a
and b.
b°
C.
d,
Crosscut travel not properly adjusted.
Refer to paragraph, "Adjusting Crosscut Travel."
If crosscut travel cannot be adjusted as described,
refer to paragraph i, below.
Table supports not properly adjusted.
Correct adjustment of table supports can be
checked with satisfactory accuracy without
removing the table boards, by checking at the
various positions on the top surface of the table,
described in paragraph, "Adjusting Table Supports
Parallel to Radial Arm".
Saw blade not square with table.
Adjust as described in paragraph, "Squaring the
Saw Blade to the Table".
21
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