Balluff BML SL1-ALZ-U-ZZ-U1L Series, User Manual, Page: 63 / 252

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4.3.3 Working ranges, angles, distances, tolerances
and measuring accuracy – linear application
The different mounting tolerances must be met depending
on the required measuring accuracy (see different working
ranges and maximum function range in Tab. 4-2).
4
Installation and connection (continued)
During assembly, make sure that the sensor head is
correctly positioned over the magnetic tape. The distances
and tolerances must be complied with to ensure the
correct function and linearity class of the system specific to
the application.
5
5
+Roll –Roll
Active measuring surface
Free area of
magnetizable material
Travel direction:
forward,
A (sin) before B (cos)
Y
27.3
+Yaw
–Yaw
–Pitch
+Pitch
Z
Z
Fig. 4-6: Distances and tolerances with linear applications
Working range 1 Working range 2 Function range
Mechanical tolerances
Z
(air gap sensor head/magnetic tape)
≤ 0.4 mm ≤ 1.0 mm ≤ 1.3 mm
Z
(air gap sensor head/magnetic tape
with cover strip)
≤ 0.25 mm ≤ 0.85 mm ≤ 1.15 mm
Y
(lateral offset) ±0.5 mm ±1.0 mm ±1.5 mm
Pitch ±0.5°
Yaw ±1°
Roll
±0.5°
Measuring accuracy
Max. non-linearity
of entire system
(sensor head + magnetic tape)
±15 µm ±40 µm ±100 µm
Non-linearity of sensor head ±5 µm ±30 µm ±40 µm
Hysteresis ≤ 1 µm ≤ 2 µm ≤ 25 µm
Repeat accuracy ≤ 1 µm ≤ 2 µm ≤ 2 µm
Tab. 4-2: Working ranges, angles, distances and tolerances and
measuring accuracy
BML SL1-ALZ _ -U_ ZZ- _ U1L - _ _ _ _
Absolute magnetic encoder system
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