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4) THE SWITCH
The machine has a lockable trigger switch. Squeeze the trigger to start the machine. To
lock the switch on, press the lock button while holding the trigger switch on. To release,
squeeze the trigger and release.
WARNING: Never lock the switch on when drilling hand-held. Only lock the switch on when mounted to a rig.
5) OVERLOAD PROTECTION, OVERHEAT PROTECTION
Overload Warning System:
When the load reaches overload conditions, the indicator light will flash on and off.
Overload:
If the excessive load is sustained too long, the motor will shut down completely and the LED indicator light will glow solid red. In this
case, the motor must be first shut off and then restarted.
Overheat Thermal Protection:
If the temperature of the motor gets too high, the thermal protection will shut the motor down and the LED indicator light will glow
solid red. The switch must be first shut off and then restarted.
CAUTION: The motor will be damaged if it is repeatedly overloaded or overheated. Always cool the motor by running at no
load for a few minutes whenever it stops from either overheat or overload.
6) SAFETY CLUTCH
This machine is equipped with a mechanical clutch to protect the operator and machine from excessive torque forces. After the clutch
slips many times, it will become worn and slip at lower and lower torque levels. When this happens, it must be serviced by an authorized
service provider. The recommended torque of the clutch nut is 21 Nm.
7) DIAMOND CORE DRILLING
1.
Press the "Reset" button on the PRCD interrupter device to energize the circuit to the machine.
Then squeeze the trigger switch to turn the machine on.
2.
Open the water valve slightly and very gently begin the cut. If holding by hand, start the cut by approaching at an angle of about
30 degrees to the cutting surface. (A large piece of wood with a large V notch cut in it will help prevent the bit from wandering at
the beginning.) Once about a third of the arc is cut, straighten the bit to the correct perpendicular angle while keeping enough
feed pressure on the bit to prevent it from wandering.
3.
Make adjustments to the water feed as needed. The water leaving the cut should be a solid colored slurry with about the
consistency of milk.
4.
Once in the cut, use steady feed pressure .
5.
When breaking through, hold the machine tightly and reduce feed pressure .
11
Lock Button
Trigger Switch
Indicator Light
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