Easy-Laser D160 BTA Manuel page 7

TOLERANCES
Recommended maximum tolerances from
manufacturers of belt transmissions is 0.25–0.50°.
Recommendations are always dependent on belt
type. Please consult the design manual of the
specific belt type.
mm/m
<°
mils/inch
0.1 1.75
0.2 3.49
0.3 5.24
Recommended
0.4 6.98
0.5 8.73
0.6 10.47
0.7 12.22
0.8 13.96
0.9 15.71
1.0 17.45
A misalignment of 0.25° is the same as 0.44 mm
[17.6 thou] at a distance between the targets of
100 mm [4"].
B1. ALIGNMENT wITH TARGETS
Misaligned sheaves
Aligned sheaves
The beam disappears in the slot of the target.
Laser beam
Laser beam
B2. DIffERENT SHEAvE fACE wIDTH
If necessary, adjust the targets for possible
difference in sheave face width before alignment.
Each mark corresponds to 1 mm [40 thou].
X
Example:
X: Sheave face widths equal.
Y: Target sheave face width 4 mm thinner than Trans-
mitter sheave.
B3. vERTICAL ALIGNMENT
Place the targets vertically according to the picture
to check the parallelity between the sheaves. If
necessary, shim rear or front feet.
If the offset is too large, move the sheave axially
on the shaft until the beam hits in the center of the
both targets.
B4. HORIzONTAL ALIGNMENT
Place the targets horizontally according to the
picture, and adjust the movable machine until the
beam hits in the center of the both targets.
B5. ADjUST THE BELT TENSION
Y