Operation - DeWalt DHS790 Manual

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Fig. O
Miter Pointer Adjustment (Fig. G)
Unlock the miter lock lever 
 6 
to move the miter arm to the zero position. With the miter lock
lever unlocked, allow the miter arm to snap into place as you rotate the miter arm to zero.
Observe the miter pointer 
 10 
and miter scale 
loosen the miter pointer screw holding the pointer in place, reposition the pointer and tighten
the screw.
Miter Lock Adjustment (Fig. G, P)
The miter lock rod 
 50 
should be adjusted if the table of the saw can be moved when the miter
lock lever 
is locked (down). To adjust the miter lock, put the miter lock handle in the unlocked
 6 
(up) position. Using a 1/2" open end wrench, loosen the lock nut 
Using a slotted screwdriver, tighten the miter lock rod by turning it clockwise. Turn the lock rod
until it is snug, then turn counterclockwise one turn. To ensure the miter lock is functioning
properly, re-lock the miter lock to a non-detented measurement on the miter scale – for example,
34º – and make sure the table will not rotate. Tighten lock nut.
Fig. P
51
50
Bevel Square to Table Adjustment (Fig. A, I, Q)
To align the blade square to the table, lock the arm in the down position with the lock down
pin. Place a square against the blade, ensuring the square is not on top of a tooth. Loosen the
bevel lock knob 
 6 
and ensure the arm is firmly against the 0° bevel stop. Rotate the 0° bevel
adjustment screw 
 36 
Fig. I) with the 1/2" blade wrench as necessary so that the blade is at 0°
bevel to the table.
Fig. Q
Bevel Pointers (Fig. I)
If the bevel pointer 
 16 
does not indicate zero, loosen the screw 
move the pointer as necessary. Ensure the 0° bevel is correct and the bevel pointers are set before
adjusting any other bevel angle screws.
Bevel Stop 45º Right and Left Adjustment (Fig. H, I)
There are two bevel stop override levers, one on each side of the saw.
To adjust the right 45° bevel angle, loosen the bevel lock knob 
lever 
 29 
to override the 0° bevel stop. When the saw is fully to the right, if the bevel pointer 
does not indicate exactly 45°, turn the left 45° bevel adjustment screw 
wrench until the bevel pointer indicates 45°.
10
 11 
. If the pointer does not indicate exactly zero,
on the miter lock rod 
 51 
 37
that holds it in place and
and pull the 0° bevel override
 26 
 35 
with the 1/2" blade
To adjust the left 45° bevel angle, first loosen the bevel lock knob 
left. If the bevel pointer 
 16 
does not indicate exactly 45°, turn the right 45° bevel adjustment
screw 
 35 
until the bevel pointer reads 45°.
Adjusting the Bevel Stop to 22.5° (or 33.9°) (Fig. H, I)
nOTE: Adjust the bevel angles only after performing the 0° bevel angle and bevel
pointer adjustment.
To set the left 22.5° bevel angle, flip out the left 22.5° bevel pawl 
knob 
 26 
and tilt the head fully to the left. If the bevel pointer 
turn the crown adjustment screw 
pointer reads 22.5°.
To adjust the right 22.5° bevel angle, flip out the right 22.5° bevel pawl 
lock knob 
 26 
and pull the 0° bevel override lever 
saw is fully to the right, if the bevel pointer 
adjustment screw 
contacting the pawl with a 7/16" wrench until the bevel pointer indicates
 33 
exactly 22.5°.
Fence Adjustment (Fig. H)
In order that the saw can bevel to many bevel positions, one of the fences may have to be
adjusted to provide clearance. To adjust each fence, loosen the fence adjustment knob 
slide the fence 
 14 
outward. Make a dry run with the saw turned off and check for clearance.
Adjust the fence to be as close to the blade as practical to provide max imum workpiece support,
without interfering with arm up and down movement. Tighten the fence adjustment knob
securely. When the bevel operations are complete, don't forget to relocate the fence.
For certain cuts, it may be desirable to bring the fences closer to the blade. To use this feature,
back the fence adjustment knobs out two turns and move the fences closer to the blade past the
.
 50 
normal limit, then tighten the fence adjustment knobs to keep the fences in this location. When
using this feature, make a dry cut first to ensure the blade does not contact the fences.
nOTE: The tracks of the fences can become clogged with sawdust. If you notice that they are
becoming clogged, use a brush or some low pressure air to clear the guide grooves.
Rail Guide Adjustment (Fig. A)
Periodically check the rails for any play or clearance. The right rail can be adjusted with the rail
adjustment screw 
shown in Figure A. To reduce clearance, use a 4 mm hex wrench and
 23 
rotate the rail adjustment screw clockwise gradually while sliding the saw head back and forth.
Reduce play while maintaining minimum slide force.

OPERATION


WARNING: To reduce the risk of serious personal injury, turn tool off and remove
the battery packs or power supply before transporting, making any adjustments,
cleaning, repairing, or removing/installing attachments or accessories. An accidental
start-up can cause injury.

WARNING: Always use eye protection. All users and bystanders must wear eye
protection that conforms to ANSI Z87.1 (CAN/CSA Z94.3).

WARNING: To ensure the blade path is clear of obstructions, always make a dry run
of the cut without power before making any cuts on the workpiece.

WARNING: Install the table extensions to both sides of the saw's base. Refer to
Assembling the Table Extensions section.
Installing and Removing the Battery Packs (Fig. R)
nOTE: For best results, make sure your battery packs are fully charged.
To install the battery packs 
 20 
of the motor housing and slide them in until they are firmly seated in the tool and ensure that
they do not disengage. Insert the dust cover 
between the batteries.
NOTICE: Keep the dust cover in place whenever the corded power supply is not
in use.
To remove the battery packs from the tool, press the battery release button 
pull the battery packs out. Insert them into the charger as described in the charger section of
this manual.
 16 
and tilt the head to the
 26 
 32 
. Loosen the bevel lock
 16 
does not indicate exactly 22.5°,
 33 
contacting the pawl with a 7/16" wrench until the bevel
 32 
 29 
to override the 0° bevel stop. When the
 16 
does not indicate exactly 22.5°, turn the crown
into the tool, align the battery packs with the rails on the side
into the corded power supply receptacle 
 59 
. Loosen the bevel
 53
and
in
 58 
and firmly
 53 

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