Promac SX-823DGB Mode D'emploi page 12

9-4.ADJUSTING BLADE TENSION AND BLADE TRACKING
To tension the blade, turn the blade tension handle (fig. 1)(A) clockwise. The scale is
graduated to indicate blade tension of 20,000, 30.000 and 35,000 pounds per square
inch (psi). For carbon blades, the blade should be tensioned at 20,000 psi. For bi-
metal blades (similar to the one supplied with the machine), the blade should be
tensioned at 30,000 or 35,000 psi. Always release blade tension at the end of each
working day to prolong blade life. Make sure the blade is tensioned correctly before
checking or adjusting tracking. The blade is tracking properly when the back of the
blade is just lightly touching the wheel flanges of both wheels while the machine is
running.
9-5.ADJUSTING CUTTING WIDTH
First loosen screw (A) (fig.2). Move the left blade guide bar to the suitable
position. Then tighten screw (A).
9-6.ADJUSTING BLADE GUIDE ROLLER BEARINGS, CARBIDE BLADE GUIDES AND BACK-UP BEARINGS AND
CLEARING THE CUTTING CHIP
Before making the following adjustments, make sure
the blade is tracking and tensioned properly:
1. The back of the blade (A) (fig3) should ride against the
back-up block (B). To adjust, loosen set screw (C) and
move
the guide block (D) up or down, until it lightly touches the
back of the blade .
2. The saw blade (A) should also ride between and lightly
touch the two blade guide roller bearings (E) and (F) (fig.
9) The front bearing (E) (fig. 9) is mounted on an eccentric,
and can easily be adjusted suit blade thickness by loosening
set screw (G) and turning shaft (E).
3. The carbide blade guides (H) (fig 9) should also be
adjusted so they lightly touch the blade by loosening
screw (K).
4. The blade guide roller bearings, carbide guides and backup bearing on holder (fig 9 ) should be adjusted in
the same manner.
5. Cutting chips on the blade will be cleared by the steel brush.
9-7.BLADE AND COOLING SYSTEM
The use of proper cutting fluid is essential to obtain maximum efficiency
from a band saw blade. The main cause of tooth failure is excessive heat
build-up. This is the reason that cutting fluid is necessary for long blade life
and high cutting rates. cutting area and blade wheels should be kept
clean at all time.
The rate of coolant flow is controlled by the stop valve lever (A) (fig. 4),
which directs the coolant onto the blade. The lever (A) is shown in the
off position.
Always keep the floor dry to prevent slip or any accident.
A
Fig. 2
A F G E H
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A
Fig. 1
Fig.3 B K D C
A Fig.4 A