DeWalt DCM849 Instructions Manual page 38

EngLIsh
2. Line up the centre hole on the hook and loop pad
the centring tube 19 and attach the pad to the hook and
loop backing pad 21 .
3. Screw backing pad 21 onto spindle
spindle lock button .
6
To Remove Pads
Turn the pads by hand in the opposite direction from normal
rotation to allow lock button to engage spindle, then unscrew
pads in normal direction for right-hand thread.
Prior to Operation
1. Be sure the polishing pad is mounted correctly.
2. Make sure the pad rotates in the direction of the arrows on
the accessory and the tool.
3. Make sure any dirt is washed off the workpiece surface.
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and
applicable regulations.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can cause injury.
Proper Hand Position (Fig. E)

WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.

WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of a
sudden reaction.
Proper hand position requires one hand on the auxiliary
handle 7 with the other hand on the main handle
Variable Speed Trigger Switch (Fig. A)
The variable speed trigger switch permits speed control from 0
to 2200 RPM.
To turn the tool on, squeeze the trigger switch
you depress the trigger, the faster it will operate. Releasing the
trigger turns the tool off.
Use lower speeds for applying compounds, and higher speeds
for polishing.
Trigger Locking Button
The tool can be locked on for continuous use by squeezing
the trigger switch 5 fully and depressing the lock button
shown in Figure A. 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.
nOTE: The trigger switch can only be locked on with the tool
running at the maximum RPM designated by the speed control
wheel 3 .
36
Speed Control Wheel (Fig. A)
with
20
The maximum speed of your tool can be changed by rotating
the speed control wheel
8 , while depressing
versatility, the trigger switch
position and tool speed changed by means of the speed control
wheel alone.
The speed control wheel can be set for any speed between
800 and 2200 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 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.
•
•
A conventional polisher running at a typical no-load speed of
2200 RPM slows down to about 1800 RPM under a polishing
load. Your polisher will continue to run at 2200 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 (Fig. E)
14 .
1. Without turning the tool on, grasp the handles of the tool
2. Keep the tool away from your body and depress the
3. Make sure you have a firm grip on the handles.
. The farther
5
4. Move the tool evenly over the surface of the workpiece,
5. Switch off the machine before taking the tool from
6. Check your work at short intervals.
The auxiliary handle
the tool for left-handed or right-handed operation.
11
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.

3 to the desired setting. For added
5 may be locked in its full on
The electronic speed control operates only when the trigger
switch 5 is fully depressed.
The effect of electronic speed control is much easier to
observe at lower speed settings (1400 RPM and below), than
at high speeds.
and pick it up.
trigger switch.
without applying pressure.
the surface.
7 can be easily changed to either side of
WARNING: High-speed rubbing action of the polishing
bonnet upon the workpiece surface can build a static