Balluff BML-S1H1 Series, User Manual

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3
Construction and function (continued)
3.2 Function
The BML is a magnetically coded, non-contact, absolute
position measuring system consisting of a sensor head
and magnetic tape. The sensor head and magnetic tape
are mounted on the machine. The magnetic tape contains
alternating north and south poles.
The sensors in the sensor head measure the magnetic
alternating field. Moving without any contact over the
magnetic tape, they sense the magnetic periods, allowing
the controller to read out the travel range via the interfaces
(SSI/BiSS) or count via 1 V
SS
.
The entire function scope can only be achieved
with the BAE PD-ML-010-02 (Configuration
Tool incl. programming adapter; see
accessories). With the Configuration Tool, the
BML-S1H can be configured quickly and simply
on a PC.
The most important features include:
– Display of the position and the error state
– Setting the null point/setting the offset
– Calibration of the measuring system to
compensate for assembly tolerances
3.3 Sensor head and magnetic tape
For magnetic tape variants, see section 8.1.
Fig. 3-4:
10+0.2
1.55±0.1(BML-M02...)
1.35±0.1(BML-M03...)
mastertrack
Magnetic tape
Magnetic tape
Measuring range
[mm]
Total length
[mm]
Sensor head
A-coding BML-M0_-A3_-A_-M0006- A 37
2)
64±2 BML-S1H…-M3 A A-…
BML-M0_-A3_-A_-M0009- A 64 91±2 BML-S1H…-M3 A A-…
C-coding BML-M0_-A3_-A_-M0026- C 229
2)
256±2 BML-S1H…-M3 C A-…
BML-M0_-A3_-A_-M0028-
C
256 283±2 BML-S1H…-M3
C
A-…
F-coding BML-M0_-A3_-A_-M0102- F 997
2)
1024±2 BML-S1H…-M3 F A-…
2)
Measuring range can be extended while, however, impairing the non-linearity in the end range (see Fig. 3-2 and Fig. 3-3). An extension of the measuring
range by 14 mm increases the non-linearity in the end range to ±20 µm.
Tab. 3-1: Magnetic tape – sensor head combinations
Total length
Measuring range
1)
1) Dimension without cover strip. With cover strip: plus 0.15 mm.
BML-S1H1/2-B/S6 _ C-M3 _ A-D0-KA _ _ , _ -S284
Absolute Magnetically Coded Position Measuring System
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