centauro SP 400, Use And Maintenance Manual, Page: 21 / 50

A-21
A. SAFE WORK PROCEDURES
A.1 GENERALLY
For the safe work procedures the provisions of Appendix A of EN 1807
.
A.2 ADJUSTING THE MACHINE
A.2.1 To ensure that a band saw works precisely and efficiently, it is essential for:
A the type of blade to be suited to the material to be cut;
B the machine to be equipped with a blade of the correct width required by the operation carried out;
C the edge of the blade to be sharp and well formed and prepared;
D the maximum thickness of the blade to be adequate for the diameter of the wheel.
A.2.2 For the provisions regarding choice, adjustment, sharpening, maintenance, handling and storage of the
blades, see paragraph A.9.
TENSION
A.2.3 When the machine is not in operation, for example at the end of a work shift, the tension of the blade must
be slackened, placing a sign on the machine to indicate this state and to remind the next operator to adjust
the tension before starting up the machine.
ALIGNMENT
A.2.4 Alignment is done to ensure that the blade runs on the pulleys correctly, tilting a pulley.
A.2.5 During alignment, the contrast wheel in band saws must be released from the blade to allow its free movement.
With the machine isolated, the top pulley must be tilted to bring the blade into the correct position. If the blade
is not aligned correctly when it is under tension, the procedure must be repeated. After alignment, it is
necessary to check the tension of the blade again.
A.2.6 With feeders and rip saws, the blade has been designed to protrude from the edge of the pulley. Alignment
can be made with the machine isolated from the source of energy and the wheel guards open. With machines
with a table, the adjustable guard must be positioned on the table. With rip saws without a table, the adjustable
guard must cover the blade.
BLADE GUIDES AND CONTRAST WHEEL
A.2.7 The blade guides, which can be composed of fixed buffers, pegs, or rotating rollers, perform an important
function of supporting the blade. The guides must not lock the blade, but simply support it during cutting.
A.2.8 The purpose of the contrast wheel in table belt saws is to provide a support for the blade during cutting. The
wheel must be positioned at a minimum distance on the rear side of the blade when the blade turns freely
after being tensioned and aligned. The contact between the blade and the wheel causes a groove to be formed
in the contrast wheel and the blade to break.