Assembly And Operation; Applications; Prior To Operation - Hitachi G12VE Manual De Instrucciones

English
Electronic Control
The grinder has an electronic speed control which
provides:
○ full speed at all times in the range up to rated load.
○ soft-start.
○ variable speed
○ Kickback Protection
The kickback protection feature cuts off the power
to the motor and stops the power tool in the event of
a sudden drop in the rotational speed of the wheel
during operation (for example, if the wheel locks
during cutting operation, etc.).

APPLICATIONS

○ Removal of casting fi n and fi nishing of various type of
steel, bronze and aluminum materials and castings.
○ Grinding of welded sections or sections cut by means
of an acetylene torch.
○ Grinding of synthetic resins, slate, brick, marble.
WARNING
To avoid the risk of serious injury, NEVER use
this grinder with cup wheels and/or saw blades.

PRIOR TO OPERATION

1. Power source
Ensure that the power source to be utilized conforms
to the power source requirements specifi ed on the
product nameplate.
2. Power switch
Ensure that the switch is in the OFF position. If the
plug is connected to a receptacle while the switch is
in the ON position, the power tool will start operating
immediately and can cause serious injury.
When the kickback protection, 0 voltage re-start
protection or overload protection feature has been
activated, return the power switch to the OFF position
and wait for 1 second or more before re-starting the
power tool.
3. Extension cord
When the work area is far away from the power
source, use an extension cord of suffi cient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
10

ASSEMBLY AND OPERATION

○ 0 Voltage Re-start Protection
The 0 voltage restart protection feature prevents the
power tool from restarting after the power has been
temporarily cut off during operation.
○ Overload Protection
The overload protection feature shuts off the power
to the motor in the event of overloading of the motor
or a conspicuous reduction in rotational speed during
operation.
NOTE
The grinder is equipped with a rotational speed control
circuit. The rotational speed may fl uctuate slightly due
to the conditions of use and working voltage.
WARNING
Damaged cord must be replaced
or repaired.
4. Check the receptacle
If the receptacle only loosely accepts the plug, the
receptacle must be repaired. Contact a licensed
electrician to make appropriate repairs.
If such a faulty receptacle is used, it may cause
overheating, resulting in a serious hazard.
5. Check your work environment
Ensure the following before operation;
○ No fl ammable gas, liquid, or object at worksite.
○ When grinding thin steel sheet it may cause a high
booming noise.
To avoid such noise, place a rubber mat under the
workpiece.
○ Clear the area of children or unauthorized
personnel.
6. Mounting the wheel guard
Be sure to mount the wheel guard at an angle that will
protect the operator's body from injury by a broken
wheel piece.
[How to attach and adjust the wheel guard] (Fig. 2)
○ Set the wheel ass'y to the packing gland.
○ Tighten M5 screw to secure the wheel guard while
the lever is in closed position.
○ Perform the adjustment, of the wheel guard
while the lever is released. (Loosen M5 screw
and readjust if the wheel guard does not rotate
smoothly.)
○ After adjustment, if grinder operation is required,
perform the operation only after setting the lever
in closed position.
○ Lubricate the sliding section of the set piece (B)
and the lever if the lever does not move smoothly.