Rubi DM-500 Manual De Instrucciones página 25

3.- FITTING AND REPLACING BLADE
• Use only blades constructed in compliance with the EN 13236 Standard.
• Use only diamond blades suitable for the technical characteristics of the
machine and of the material to be cut.
• Check that the diamond blade used is perfectly balanced, centred,
straight and fully tightened.
• Do not attempt to cut slabs of material that are too large, too small or
too difficult to position for cutting.
• Before starting the machine check that the blade protection hood is
correctly secured.
• Keep blades inside special cases to avoid damaging them.
• Before carrying out any operations on the machine, disconnect the
electrical power supply by moving the main switch to the O position, and
lock it in place.
Change the blade when cutting quality ceases to be excellent due to blade wear or
deformation. A damaged blade is a source of risk. Blade duration depends on how much
the machine is used every day, the type and thickness of the materials being cut, and the
constancy of cooling water flow on the blade.
The machine is designed to be fitted with a 500 mm diameter blade. However, it can
also operated with blades of diameters between 350 or 400 mm, with a maximum
central hole size of 60 mm. Remember that blade diameter is a parameter that affects
the maximum height of the work piece and the effective travel distance of the carriage.
• This operation must be carried from the front of the machine, unscrew the four
knobs (fig.21-A) securing the blade protection hood and remove the hood (fig. 21-
B).
• Lock the motor shaft in place with an open end spanner (fig. 22-C). Unscrew the
lock nut by turning it in a clockwise direction with the spanner provided (fig. 22-D).
• Remove the blade and check the condition of the front and back flanges (fig. 23). If
necessary, clean flanges or grind them down with fine abrasive paper.
B
21
C
22
ENGLISH
A
D
23
• Fit the new blade with the correct rotation direction. The arrow on the blade must
point in the same direction as the arrow located above the blade protection hood
(fig. 24) (clockwise direction seen from front of machine).
• Fix the blade by turning the lock nut in an anticlockwise direction, holding the motor
shaft in place with the other spanner.
• Replace the blade protection hood and secure with the four knobs.
NOTE:
• To cut GRANITE we advise to use first speed of the motor (RPM 1400).
• To cut MARBLE we advise to use second speed of the motor (RPM 2800).
24
HECKING BLADE ALIGNMENT
To check for correct blade alignment, fix a comparator to the worktable so that it
touches the blade near the teeth and is clear of the flange vertical. Then proceed as
follows:
A
1) Mark the contact point of the comparator on the blade A.
B
2) Move the slide so that the comparator is on the other side of
the blade, following a line that passes beneath the flange B.
C
3) Manually rotate the blade until the comparator coincides with
the point previously marked C.
The difference measured must not exceed 0.15 mm for a
blade with diameter 500 mm.
CHECKING VERTICALLY OF BLADE
To check blade vertically proceed as follows:
D
1) Fix the comparator on the worktable with the upper head in a
position that is clear of the flange when the cutting head is
lowered D.
2) Lower the cutting head and manually rotate the blade until the
E
comparator coincides with the point marked previously E.
Tolerance: For cuts on marble, the difference must not
exceed 0.15 mm for a blade with diameter 500 mm. For cuts
on granite in incremental cutting strokes, do not exceed 0.1
mm.
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