Bosch GTM 12 JL Professional - Manual (Page 46)

46 | English
1 609 92A 0BP | (9.7.13) Bosch Power Tools
Checking and Adjusting the Basic Adjustment
To ensure precise cuts, the basic adjustment of the machine
must be checked and adjusted as necessary after intensive
use.
A certain level of experience and appropriate specialty tools
are required for this.
A Bosch after-sales service station will handle this mainte-
nance task quickly and reliably.
Adjusting the Laser
– Bring the power tool into the table saw working position.
(see “Working Position”, page 47)
– Turn the saw table 22 to the 0° detent 27. The lever 26
must be felt to engage in the detent.
Checking: (see figure M1)
– Draw a straight cutting line on the workpiece.
– Push button 17 and slowly guide the tool arm downward
with the handle 18.
– Align the workpiece in such a manner that the teeth of the
saw blade are in alignment with the cutting line.
– Hold the workpiece in this position and slowly guide the
tool arm upward again.
– Clamp the workpiece.
– Switch the laser beam on with switch 35.
The laser beam must be in alignment with the cutting line on
the workpiece over the complete length, also when the tool
arm is lowered.
Adjusting the Parallelism: (see figure M2)
– Undo the rubber cap 48.
– Screw the adjustment screw 49 in or out using a suitable
screwdriver until the laser beam is parallel with the cutting
line on the workpiece over the complete length.
Adjusting the Flush Levelling: (see figure M3)
An adjustment screw 50, which is located below the opening
marked with “R/L”, is used for adjustment of the flush leve-
ling.
– Screw the adjustment screw 50 in or out with the slotted
screwdriver provided until the parallel laser beam is flush
with the cutting line on the workpiece over the complete
length.
One rotation in anticlockwise direction moves the laser beam
from left to right; one rotation in clockwise direction moves
the laser beam from right to left.
Adjusting the Lateral Deviation while Moving the Tool
Arm: (see figure
M4)
– Open the side rubber cap 51.
– If the laser beam moves towards the left when lowering
the tool arm, turn adjustment screw 52 clockwise using a
suitable screwdriver.
If the laser beam moves towards the right, turn adjust-
ment screw 52 anticlockwise.
– After adjusting, check the flushness with the cutting line
again. If required, align the laser beam with the adjustment
screw 50 again.
Aligning the Fine Scale (see figure N)
– Bring the power tool into the chop and mitre saw working
position. (see “Working Position”, page 42)
– Turn the saw table 22 to the 0° detent 27. The lever 26
must be felt to engage in the detent.
Checking:
The 0° mark of the fine scale 44 must be in alignment with the
0° mark of the scale 23.
Adjusting:
– Remove the insert plate 24.
– Loosen the screw 53 with the slotted screwdriver provid-
ed and align the fine scale alongside the 0° marks.
– Retighten the screw again.
Aligning the Angle Indicator (Vertically)
(see figure
O)
– Bring the power tool into the chop and mitre saw working
position. (see “Working Position”, page 42)
– Turn the saw table 22 to the 0° detent 27. The lever 26
must be felt to engage in the detent.
Checking:
The angle indicator 45 must be in alignment with the 0° mark
of the scale 46.
Adjusting:
– Loosen the screw 54 with the slotted screwdriver provid-
ed and align the angle indicator alongside the 0° mark.
– Afterwards, check to ensure that the adjustment made is
correct for the 45° mark.
– Retighten the screw again.
Aligning the Fence
– Bring the power tool into the table saw working position.
(see “Working Position”, page 47)
– Turn the saw table 22 to the 0° detent 27. The lever 26
must be felt to engage in the detent.
Checking: (see figure P1)
– Adjust an angle gauge to 90° and position it between the
fence 30 and the saw blade 7 on the saw table 22.
The leg of the angle gauge must be flush with the fence over
the complete length.
Adjusting: (see figure P2)
– Loosen all Allen screws 38 with the Allen key 5 provided.
– Turn the fence 30 until the angle gauge is flush over the
complete length.
– Retighten the screws again.
Setting the Standard Bevel Angle 0° (Vertical)
– Bring the power tool into the table saw working position.
(see “Working Position”, page 47)
– Turn the saw table 22 to the 0° detent 27. The lever 26
must be felt to engage in the detent.
Checking: (see figure Q1)
– Adjust an angle gauge to 90° and position it on the saw ta-
ble 22.
The leg of the angle gauge must be flush with the saw blade 7
over the complete length.
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