Ryobi RBS904 Manual Del Usuario página 16

■
Set scale indicator to zero and tighten screw with a
phillips screwdriver.
NOTE: always make a test cut to insure the squareness
of the blade prior to beginning any new project. If not
square, it may be necessary to loosen the screws under
the saw table to make the adjustment (mitre slot must
be parallel to the saw blade). Once square, retighten
screws.
ADJUSTING BLADE TENSION
See Figures 10-11.
■
Switch off the saw.
■
Before using the band saw, turn the blade tension
knob on the top of the saw clockwise to engage
tension.
■
Note: adjustments of blade tension can be made at
anytime.
■
Pluck the back straight edge of the saw blade like a
guitar string while turning the tension knob.
Sound becomes higher pitched as tension increases.
Never increase blade tension so tight as to completely
compress the spring. When completely compressed, the
spring can no longer act as a shock absorber.
Too much tension may cause the blade to break. Thicker
workpieces require higher tension; maximum tension is
not needed for all cuts. Too little tension may cause the
blade to slip on the wheels.
TRACKING THE BLADE
See Figure 11.
Adjust blade tension properly before making tracking
adjustments. Check that blade guides do not interfere
with the blade. Blade gullet (the deepest part of the
blade tooth) should be in the centre of the tire.
To adjust:
Disconnect from power. Open front covers by
unscrewing the cover locking screw. Watch the blade's
position on the upper tire as, by hand, you slowly turn
the upper wheel clockwise. If the blade moves away
from the centre of the tire, the tracking must be adjusted.
If the blade has moved left or right of centre:
■
Turn the blade tracking knob (clockwise if blade has
moved left; counterclockwise if blade has moved
right) while turning the wheel by hand until the blade
moves back and rides in the centre of the tire.
■
Check the position of the blade on the lower tire. The
blade should be completely on the tire (gullet of the
blade teeth in the centre). If not, adjust the tracking
until the blade is on both tires.
■
Rotate the upper wheel by hand in a clockwise
direction for a few more turns. Make sure the blade
stays in the same location on the tires. Readjust, if
necessary, until blade is tracking properly.
■
Close front covers and tighten cover locking screw.
■
Switch on the saw.
■
Verify saw blade is centred on the tire (through the
16
Original Instructions
tracking view window). If not centred, repeat above
steps.
WARNING
The blade guides have been preset at the factory.
These settings are functional for some applications.
We recommend that you check and adjust blade
guide settings before fi rst use of your saw. Refer
to Adjusting Blade Guide Support and Thrust
Bearings procedures explained in the "Adjustment"
section of this operator's manual.
INSTALLING THE RIP FENCE
■
Place the rip fence on the left side of the saw table,
with the lock handle at the front.
■
Push down the lock handle to lock the position of
the rip fence.
■
Turn the lock handle to adjust tightness of the
clamps.
OPERATION
WARNING
Do not allow familiarity with the product to make you
careless. Remember that a careless fraction of a
second is suffi cient to infl ict serious injury.
WARNING
Always wear eye protection. Failure to do so could
result in objects being thrown into your eyes, resulting
in possible serious injury.
WARNING
Do not use any attachments or accessories not
recommended by the manufacturer of this product.
The use of attachments
recommended can result in serious personal injury.
WARNING
To avoid blade contact, adjust the blade guide
assembly to just clear the workpiece. Failure to do so
could result in serious personal injury.
WARNING
Never operate saw without the blade guard secured
and the front covers locked. To do so could result in
serious personal injury.
or accessories not