Imer Group MASONRY 750 PLUS Manual De Uso página 18

overload the motor, the operator must adjust the carriage
speed. This speed also depends on the characteristics of
the material to be cut (hardness, toughness, etc.).
14.3 Cut from above
Unlock the cutting head acting on the locking lever (ref. 16 Fig.
1), position the piece to be cut, start the sawing machine and
start cutting from above acting on the head lever (ref. 15, Fig.
1).
14.4 Changing the disc
To change the disc refer to the "Disc assembly" paragraph.
15 Use of cutting disc diameter 700 mm
A cutting disc with a diameter of 700 mm can be installed on
the machine. The operation requires the cutting head stroke
calibration, an operation carried out as standard by the
manufacturer for a 750 mm diameter disc. Since this
adjustment, if carried out incorrectly, can damage the machine
and cause risks for people, it is recommended that it is carried
out by skilled and qualified personnel.
Proceed as follows:
1. Make sure that the machine is disconnected from the power
supply.
2. Fit the 700 mm diameter disc according to the procedure
indicated in the "Disc Assembly" paragraph.
3. Loosen the knob (ref. 16, Fig. 1).
4. Lower the cutting head until the disc is in the best cutting
position (the outer diameter of the disc must protrude 15 mm
from the cutting table).
5. Turn the screw until the desired height adjustment is
obtained and then tighten the knob (ref. 16, Fig. 1).
At this point the cutting head is adjusted for a 700 mm
diameter disc.
- If it is necessary to reassemble a 750 mm diameter
disc, it is necessary to repeat the adjustment, restoring
the factory setting.
- Note that the disc must have external diameter of
700 mm, central hole diameter of 25.4 mm and maximum
thickness of 4 mm.
16 MAINTENANCE
- Maintenance must be done by adequately trained
personnel, after switching off the electric motor, and
disconnected the power plug.
- Check the condition of the power cable before
starting to use the machine: someone may have
inadvertently and/or unconsciously damaged it.
- Make sure the guards/safety equipment are always
functional and in good condition.
In particular, keep the blade guards efficient and clean, taking
care to replace them in case of damage.
Do not leave the machine outdoors: it must be protected from
weather.
The cleaning operations to be carried out at the end of each
work shift are indicated below.
16.1 Tank cleaning
Empty the tank, removing the cap. Remove the cutting deposit
formed using a jet of water.
IMER INTERNATIONAL S.p.A
16.2 Tank disassembling
Empty the tank opening the cap and remove the tank laterally
from the right or left side.
16.3 Reference tables cleaning
The support tables must be kept clean. Deposits of dirt can
adversely affect the precision of cutting.
16.4 Runners cleaning
It is advisable to remove any trace of dirt that may have
formed on the runners.
16.5 Cleaning and maintenance of the cooling system
If no water is reaching, stop cutting immediately to avoid
damaging the blade.
Stop the machine and check that there is sufficient water in the
tank.
If necessary, unplug the machine and check that the pump tap,
hose or filter is not blocked.
16.6 Drive belt tensioning
1. Stop the saw and disconnect the power plug.
2. Unscrew the 4 screws that block the movable guard of the
belt (ref. 1, Fig. 4).
3. Loosen the 4 nuts (ref. 2,Fig. 4) that tighten the electric
motor on the disc holder boom.
4. Pull the belt acting on the nuts (ref. 3, Fig. 4), the correct
tensioning of the belt must be checked by means of a special
instrument to measure the vibration frequency of the belt, the
reference values to be considered are shown in the table
below
Type of motor
400V - 50Hz
220 V - 50Hz
400 V - 60 Hz
220 V - 60 Hz
5. Tighten the nuts of the electric motor (ref. 2, Fig. 4),
checking the alignment of the motor pulley and the disc pulley.
6. Refit the belt guard and lock it with the 4 screws (ref. 1, Fig.
4).
16.7 Replacing the drive belt
1. Switch off the electric motor and disconnect the power plug.
2. Unscrew the 4 screws that block the movable guard of the
belt (ref. 1, Fig. 3).
3. Loose (ref 2 Fig. 4) that tighten the motor plates (ref. 137,
TAV2) on the disc holder boom.
4. Loosen the belt acting on the nuts (ref. 3, Fig. 4) and
replace it with the new one.
5. Pull the belt acting on the nuts (ref. 3, Fig. 4):the correct
tension measured with frequency meter must be equal to the
value shown in Tab 6.
6. Tighten the nuts on the motor plates (ref. 2, Fig. 4),
checking the alignment of the motor pulley and the disc pulley.
7. Refit the belt guard and lock it with the 4 screws (ref. 1, Fig.
4).
18
Reference values for belt tension
New (Hz)
47 Hz +/- 2%
45 Hz +/- 2%
47 Hz +/- 2%
45 Hz +/- 2%
Table 6
Run in (Hz)
45 Hz +/- 2%
43 Hz +/- 2%
45 Hz +/- 2%
43 Hz +/- 2%