LOAD DETECTOR
ON LOAD
STOP
7
Red
Green
Yellow
Red
Orange
4-4 Side Slip Detection Function
If the Magnet sideways while drilling holes, the Drill
Motor moves will stop turning and the feed will stop.
The green and yellow indicator lamps are lighted when
the electric drill and its feed stop.
4-5 Automatic Step Feed
●
The switch to step feed occurs automatically when the
cutter has lost its sharpness.
●
When working on deep holes or large diameter holes,
chips are produced intermittently and ejected
smoothly.
4-6 Restart Prevention Function (For QA-6500)
●
When a power failure has occurred while the tool was
being used, the restart prevention function operates
when the power is restored.
●
If the drill stops during operation because of the
interruption of the power supply or accidental
unplugging of the power supply, the green and yellow
indicator lamps are lighted and the magnet regains
its attracting power, but the electric drill does not rotate
when the power supply resumes, or is plugged.
●
To resume work, turn the Switch Knob back to the Magnet
On position then forward to the Motor On position and the
Drill Motor will start turning.
5 PREPARATIONS
WARNING
When making preparations, set the Switch Knob
(operating switch) to Off and remove the Power Plug
from the power supply.
5-1 Accessory Installation
The Side Handle, an accessory, should be mounted
on the Drill Motor.
5-2 Concerning Cutter Usage
CAUTION
●
Cutters other than one-touch type can not be used.
●
For better working and greater safety, do not use
worn or broken cutters.
5-3 Cutter Precautions
When you need cutters other than the one-ouch type
supplied as accessories, refer to Optional Extras, items
10-2, 10-3 and 10-4, before you buy.
4 ELECTRONIC CONTROL FUNCTIONS
4-1 Load Detector
If there is an overload during drilling, the following
functions are automatically activated. The load detector
may not function properly if the power supply is an engine
generator or the power voltage is too high or too low.
(1) Load Indication Function
The lamps indicate the load on the Drill Motor. As the
load increases, the indicator lamps flash on in a color
sequence of green, yellow and orange starting from the
left (green). (Fig. 12)
(Fig. 12)
(2) Automatic Feed Control Function
This system automatically controls the feed rate where
several seconds after start-up of the drilling it
automatically slowly starts to feed and then the rate
varies depending on the load condition of the Drill Motor.
The feed rate is also automatically regulated according
to the cutter diameter.
(3) Automatic Stop Function
Both the drilling and feeding operations stop
automatically and the red stop lamp comes on whenever
there is an excessive load on the Drill Motor, preventing
the Drill Motor and cutter from breaking. If the cutter is
dull, however, breakage may be inevitable.
4-2 Automatic Return Function
When the drilling is completed and there is no longer
a load placed on the Drill Motor, the feed motor
automatically reverses and retracts the Drill Motor
upward.
4-3 Limit Switch Function
When the stroke reaches its upper limit, the Limit
Switch stops both the Drill Motor and feed. Even in case
the automatic return function fails at the end of the drilling
allowing the Drill Motor to continue downward, the Limit
Switch stops both the Drill Motor and feed when the
stroke reaches its lower limit. The green and yellow
indicator lamps are lighted when the electric drill and its
feed stop.
QA4000(230V)
10.6.19, 12:52 AM
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