D300XT
D300XT Operator’s Manual
18
When you use a drill bit, drill holes with diameters of 18–25 mm (0.71–0.98
″) in
two steps. First, use the drill bit with the 70% diameter of the required diameter to drill
a hole. Then, keep the machine in the same position, and drill again with the drill bit
that matches the required diameter.
If you are going to drill holes deeper than 50
mm (2″), retract the tool above the
workpiece as often as possible. This allows chips to be removed from the hole. If the
grooves of the tool are clogged, turn off the motor and use a brush to clean them.
After you get to the depth of 40 mm (1.6
″), retract the tool above the workpiece
as often as possible. Then, manually apply the coolant from the bottle into the
drilling area.
The table that follows shows the meaning of the LED colors.
Color
Meaning
Description
Green is on
Strong surface.
Ready to work.
Green flashes
Weak surface.
We do not recommend work.
White is on
Normal work.
–
Blue flashes
Near overload.
Do not increase the feed speed. This can cause
emergency stop.
Red is on
Overheat.
Immediately retract the tool from the workpiece!
Operate with no load for 2–4 minutes to let the
temperature of the motor decrease.
Blue is on
Emergency stop.
Overload.
Make sure that the tool is sharp. Make sure that
the motor speed and the feed are correct. Use
coolant. Retract the tool from the workpiece,
press STOP, and then start again.
Violet is on
Emergency stop.
Machine tilt/vibrations
or the surface not
stable.
Make sure that the surface is stable and its
thickness is at least 8 mm (0.3
″).
Press STOP
and then start again. If the motor does not
operate, contact the service center.
Red changes to
blue
Emergency stop.
Voltage drop.
Make sure that the power source is correct.
Press STOP and then start again.
Red changes to
green
Emergency stop.
Worn brushes.
Replace the brushes. Let the motor operate
with no load for 20 minutes. If the motor does
not operate, contact the service center.
The green color is indicative only. It does not make sure that the ma-
chine will always be in contact with the surface. Thus, in each posi-
tion protect the machine with the safety strap.
If an overload occurs, the machine stops. The overload can be caused by not
enough cooling, dull tool, too fast feed, or too slow speed. Then, to start the machine
again, retract the tool from the workpiece, press STOP and then
.
