Preparing For Operation; Adjusting Mitre Angles; Adjusting Bevel Angles - Bosch GCM 12 GDL Professional Manual Original

OBJ_BUCH-1360-005.book Page 39 Wednesday, December 21, 2016 1:10 PM

Preparing for Operation

Extending the Saw Table (see figure C)
Long workpieces must be underlaid or supported at their free
end.
The saw table can be extended left and right with the saw-
table extensions 11.
– Push clamping lever 51 inward.
– Pull out saw-table extension 11 to the desired length
(max. 250 mm).
– To lock the saw-table extension, push clamping lever 51
outward again.
Extending the Fence (see figure D)
For bevel angles, the fence extensions 9 must be moved.
– Turn clamping lever 52 toward the front.
– Pull the fence extension 9 completely outward.
– To lock the adjustable fence, push clamping lever 52 down
again.
Removing the Adjustable Fence (see figure E)
For extreme bevel angles, the fence extensions 9 must be re-
moved completely.
– Pivot cover plate 53 outward.
– Turn clamping lever 52 toward the front.
– Pull the fence extension 9 completely outward.
– Remove the fence extension upward.
Adjusting the Glide Movement (see figure F)
The glide mechanism of glide arm 28 is factory-preset, and
not set to glide movement upon delivery of the power tool.
The glide movement of the glide movement controller can be
individually adjusted on the controller 54:
Hard – for more controlled work motion;
Soft – for fast saw cuts.
– For softer damping, loosen both set screws 55 using the
hex key (4 mm) 20
or
tighten both set screws 55 for harder damping.
Clamping the Workpiece (see figure G)
To ensure optimum working safety, the workpiece must al-
ways be firmly clamped.
Do not saw workpieces that are too small to clamp.
– Press the workpiece firmly against the fence 10.
– Insert the material clamp 22 provided into one of the holes
56 intended for it.
– Loosen the wing bolt 57 and adapt the material clamp to
the workpiece. Tighten the wing bolt again.
– Firmly clamp the workpiece by turning the threaded rod
58 in clockwise direction.

Adjusting Mitre Angles

To ensure precise cuts, the basic adjustment of the machine
must be checked and adjusted as necessary after intensive
use (see "Checking and Adjusting the Basic Adjustment",
page 43).
Bosch Power Tools
 Always tighten the locking knob 15 firmly before saw-
ing. Otherwise the saw blade can become wedged in the
workpiece.
Adjusting Standard Mitre Angles (see figure H)
For quick and precise adjustment of commonly used mitre
angles, detents 18 have been provided for on the saw table:
Left
0°
15°; 22.5°; 31.6°; 45° 15°; 22.5°; 31.6°; 45°; 60°
– Loosen the locking knob 15 in case it is tightened.
– Pull lever 16 and rotate the saw table 38 left or right to the
requested detent.
– Release the lever again. The lever must be felt to engage in
the detent.
Adjusting Any Mitre Angle (see figure I)
The mitre angle can be set in the range from 52° (left side) to
60° (right side).
– Loosen the locking knob 15 in case it is tightened.
– Pull lever 16 and at the same time, push mitre detent over-
ride 14 down at the front.
This locks lever 16 and the saw table can move freely.
– Turn the saw table 38 left or right by the locking knob until
the angle indicator 59 indicates the requested mitre angle.
– Tighten the locking knob 15 again.
– To loosen the lever 16 again (for adjusting standard mitre
angles), pull the lever upward.
The mitre detent override 14 snaps back to its original po-
sition and lever 16 can re-engage into the detents 18.

Adjusting Bevel Angles

To ensure precise cuts, the basic adjustment of the machine
must be checked and adjusted as necessary after intensive
use (see "Checking and Adjusting the Basic Adjustment",
page 43).
The vertical bevel angle can be adjusted in a range from 47°
(leftward) to 47° (rightward).
For quick and precise setting of frequently used bevel angles,
stops have been provided for the angles 0°, 22.5°, 45° and
47°.
Adjusting the Left-hand Bevel Angle Range
(45° to 0°)
– Pull the left fence extension 9 completely outward. (see
"Extending the Fence", page 39).
– Loosen the lock lever 17.
– Tilt the glide arm via handle 4 leftward until the angle indi-
cator 33 indicates the desired bevel angle.
– Hold the glide arm in this position and tighten lock lever 17
again.
The clamping force of the lock lever must securely hold the
position of the glide arm at any bevel angle.
Adjusting the Righthand Bevel Angle Range
(0° to 45°) (see figure J)
– Pull the right fence extension 9 completely
outward. (see "Extending the Fence",
page 39).
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