Variable Speed Trigger Switch - DeWalt DWP849X Original Instructions Manual

EN GLI SH
Proper hand position requires one hand on the side
handle (e) or the bale handle (g), with the other hand
on the main handle (r).

Variable Speed Trigger Switch

(fi g. 1)
The variable speed trigger switch permits speed
control from 0 to 3500 RPM.
To turn the tool on, squeeze the trigger switch (b).
The farther you depress the trigger, the faster it will
operate. Releasing the trigger turns the tool off.
Use lower speeds for applying liquid waxes and
polishes and higher speeds for removing dried liquid.
TRIGGER LOCKING BUTTON
The tool can be locked on for continuous use by
squeezing the trigger switch (b) fully and depressing
the lock button (f) shown in figure 1. Hold the lock
button in as you gently release the trigger switch.
To turn the tool off from a locked-on position,
squeeze and release the trigger switch once. Do
not unplug the tool with the switch in the locked-on
condition. Make sure the tool is not locked on when
plugging in.
NOTE: The trigger switch can only be locked
on with the tool running at the maximum RPM
designated by the speed control wheel (a).
NO-VOLT RELEASE
The variable speed trigger switch (b) has a no-volt
release function. In the event of a power outage
or other unexpected shut down, the trigger switch
needs to be cycled (depress the trigger switch,
release, then depress again) to restart the tool.
Do not unplug the tool with the trigger switch in
the locked-on condition. Make sure the tool is not
locked on when plugging in. If the tool is plugged
back in with the trigger switch in the locked-on
position, the tool will not run until the trigger switch is
cycled as described above.
Speed Control Wheel (fi g. 1)
The maximum speed of your tool can be changed
by rotating the speed control wheel (a) to the desired
setting. For added versatility, the trigger switch (b)
may be locked in its full on position and tool speed
changed by means of the speed control wheel
alone.
The speed control wheel can be set for any speed
between 600 and 3500 RPM and the variable speed
trigger switch will then control tool speed from zero
to the wheel setting. For example: A control wheel
setting of 2200 RPM will allow the variable speed
trigger switch to operate the tool between zero and
10
2200 RPM, depending on how far the trigger switch
is depressed.
ELECTRONIC SPEED CONTROL
The electronic speed control feature functions
whenever the trigger switch is fully depressed and
the tool is running at the selected speed determined
by the setting of the control wheel.
As you load the tool by pushing it down on the work
surface, the tool will compensate for the loading and
maintain the selected speed. If the speed selected
by the control wheel is 2200 RPM, the tool will
maintain 2200 RPM, as it is loaded.
• The electronic speed control operates only
when the trigger switch (b) is fully depressed.
• The effect of electronic speed control is much
easier to observe at lower speed settings (2600
RPM and below), than at high speeds.
A conventional polisher running at a typical no-load
speed of 2400 RPM slows down to about 2000
RPM under a polishing load. Your DWP849X will
continue to run at 2400 RPM (or any speed you
select with the control wheel) as a load is applied.
If the speed is too great, slow the tool down with
either the trigger switch or the control wheel.
Polishing (fi g. 4)
1. Without turning the tool on, grasp the handles
of the tool and pick it up.
2. Keep the tool away from your body and
depress the trigger switch.
3. Make sure you have a firm grip on the handles.
4. Move the tool evenly over the surface of the
workpiece, without applying pressure.
5. Switch off the machine before taking the tool
from the surface.
6. Check your work at short intervals.
The side handle (e) or the bale handle (g) can be
easily changed to either side of the tool for left-
handed or right-handed operation.
Use utmost care when power polishing around or
over sharp objects and contours. It is very important
to use the correct pressure while polishing various
sections of an automobile body. For example, light
pressure should be applied when polishing over
sharp edges of body panels, or over edges of the
rain gutter along the top.
WARNING: High-speed rubbing
action of the polishing bonnet upon the
workpiece surface can build a static
charge on the metal portions of this
tool resulting in a static shock when
touched.