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9. ELECTRICAL CONNECTION
- Ensure that voltage corresponds to machine dataplate spe-
cifi cations.
The power supply line must be equipped with current overload protec-
tion (e.g. thermal cutout) and protection against indirect contact (e.g.
residual current circuit breaker).
Connect the machine to an effi cient earthing system.
The size of the power cable wires must be based on operating current
and length of the power line to prevent excessive voltage drops (table
4).
Table 4
Model
Type of motor
115 V
Combi 250 VA
14.4 A
Connect the saw plug to the mains and tighten the mechanical retainer
ring with IP67 protection rating.
The saw is now ready for operation.
10. MACHINE USE
10.1 Operation
The correct side for the operator is shown in fi g.4 ref.X.
Fill the water tank to the maximum level (approx. 36 litres).
Connect the machine to the power mains and start as described in pa-
ragraph 10.
Open the valve (ref.N, fi g.1) and ensure suffi cient fl ow of cooling water
to the diamond blade.
10.2 Cutting
Rest the material to be cut on the cutting table against the stopper. De-
fi ne the required inclination using the goniometer. To adjust the cutting
head height, loosen the handwheel (ref.O, fi g.3), position the head at
the required height, then fully tighten the handwheel. Make sure that
handwheels for sloped cutting (ref.G, fi g.2) are fi rmly tightened. Start the
sawing machine as described in paragraph 10. To proceed with cutting,
press the piece to be cut on the table with your hand and move the cutter
head gripping the handle and drawing it towards you. If the feed speed
is too fast in relation to the thickness and hardness of the material the
blade might stop turning. In this case, release the disk as quickly as
possible moving the cutter head away from you until the disk recovers
its nominal rotation speed. Resume cutting, adjusting the feed speed
according to the characteristics of the material.
10.3 Angled cuts
Loosen the handwheels (ref.G, fi g.2), set the cutting head at the requi-
red angle, retighten the handwheels, and proceed as described in the
point above.
- Ensure that the tank is kept full during all work phases and in
the event of prolonged work intervals replace water regularly and
remove all processing residue.
10.4 Laser pointer
The machine is fi tted with a laser pointer that reproduces the cutting line
on the piece being machined. The track of light indicates the trajectory
of the diamond disk during the feed motion. Making the required cutting
profi le coincide with the laser profi le, it is possible to ensure the highest
accuracy of the operation.
Cuts at right angle with one side of the piece being machined do not re-
quire tracing beforehand: in fact it will suffi ce to make sure that the side
of reference is in contact with the stopper on the resting surface. Likewi-
se, using the goniometer, cutting at predefi ned inclinations is possible.
The laser light will indicate the actual position of the cut.
The laser pointer is activated when the machine is connected to the
electric mains.
The pointer is aligned with the disk and must not be moved from its
initial position.
- The pointer used emits a low power laser light, but it is in any
case advisable to avoid looking directly at the emitter itself.
IMER U.S.A. Inc.
COMBI 250 VA
Cable (mm²)
1.5
2.5
4.0
0 ÷ 12
13 ÷ 20
21 ÷ 32
11. MAINTENANCE
11.1 Premise
Routine maintenance operations can also be performed by non-speciali-
sed personnel provided that all safety standards specifi ed in the relative
sections of this manual are observed at all times.
11.2 Machine cleaning
The machine should be cleaned exclusively when it is stationary.
- All power switches must be set to "0" and plugs must be
disconnected from the mains.
1. Never use compressed air; this could cause infi ltration of dust or re-
sidue in enclosed parts.
2. Ensure that the cooling water nozzles are not obstructed.
3. Above all the cooling water in the tank must be changed every day.
4. Do not use detergents or lubricants.
11.3 Cleaning the tank
Clean the tank in the event of build-up of sediment on the base, or at le-
ast once a day. Failure to clean the tank could impair operation of the im-
mersion pump used for circulation of the diamond blade cooling water.
To clean the tank, disassemble from the machine, lock the head, hold it
by the arms and rinse with a direct water jet (this is to avoid direct con-
tact of the water with electrical parts), the proceed with manual cleaning
using cloths or brushes.
Take care not to damage cables when replacing the machine on the tank
Take care not to damage the pump when placing the machine on the
surface
11.4 Cleaning the cooling water supply circuit
At regular intervals (or when the fl ow rate of the blade cooling water is
reduced) clean the cooling water supply circuit. To do this, disassemble
the delivery nozzle (ref.P, fi g.1) located inside the blade guard and clean
in water.
Periodically clean the cooling water delivery line between the pump and
valve and blade guard using water.
11.5 Blade replacement
The diamond blade is made of material that may be damaged when
subject to high temperatures, and therefore must be cooled during the
work phases.
To replace the blade, proceed as follows:
1. Block axial movement of the cutting head by means of the handwhe-
els (ref.L, fi g.1).
2. Disassemble the front guard (ref.P, fi g.1).
3. Loosen the locknut by rotating clockwise (left thread), using a 19 mm
wrench.
4. Move the cutting head forward slightly and incline to remove the blade
from its seat.
5. Ensure that there are no foreign objects between the fi xing fl ange and
diamond blade. During disassembly, avoid use of tools that could dent
or deform the fl ange.
6. Insert the new blade proceeding in reverse order of the operation
described at point 4. Take special care to ensure correct direction of
rotation of the diamond blade.
7. Tighten the blade locknut fully down by rotating anticlockwise (left
thread), to a torque of 40 Nm.
- Always disconnect the power plug before changing the disk.
11.6 Repairs
Repairs to the electrical installation must be performed exclusively by
specialised personnel. Use exclusively original IMER spare parts; modi-
fi cations to parts are strictly prohibited. The special design of the Combi
250 VA ensures that no other maintenance other than as specifi ed abo-
ve is required.
Ensure that the contacts of the power plug and plug-switch assembly
are effi cient. If oxidation is detected, clean immediately
- In the event of activation of the RCCB, check the machine
and arrange for repairs if necessary exclusively by specialised
personnel.
11.7 Waste disposal
As regards disposal of processing waste observe all current legislation
in the country of use.
4
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