Maximum Movement Speed, Resolution, And Edge Distance; Important - Balluff BML-S1F A M 0 0-KA Série Notice D'utilisation

BML-S1F_-A/Q _ _ _ -M_ _ 0- _ 0-...
Incremental Magnetic Linear Encoder
6
Interface (continued)
6.2.2 Maximum movement speed, resolution, and
edge distance
There is a connection between the selected resolution of
the sensor head, the minimum edge distance, and the
possible movement speed that is illustrated in Tab. 6-1 and
Tab. 6-2.
BML-S1F...-M3...: system accuracy up to 10 µm
V acc. to edge distance and resolution
max
Min. edge
distance
1)
D
1 µm 2 µm
D 0.12 µs 5 m/s 10 m/s
I 0.29 µs 2 m/s 4 m/s
F 0.48 µs
1 m/s 2 m/s
G 1 µs
0.65 m/s 1.3 m/s
H 2 µs
0.3 m/s 0.6 m/s
K 4 µs 0.15 m/s 0.3 m/s
L 8 µs 0.075 m/s 0.15 m/s
N 16 µs 0.039 m/s 0.078 m/s
P 24 µs 0.026 m/s 0.052 m/s
Connection between edge distance and counting frequency, see
1)
appendix for table.
BML-S1F...-M310-... (with reference sensor):
2)
max. movement speed 10 m/s
Tab. 6-1: BML-S1F...-M3...: Selection aid for maximum movement
speed
BML-S1F...-M5...: system accuracy up to 20 µm
V acc. to edge distance and resolution
max
Min. edge
distance
1)
E
2 µm 4 µm
D 0.12 µs 10 m/s 20 m/s
I 0.29 µs 4 m/s 8 m/s
F 0.48 µs 2 m/s 4 m/s
G 1 µs 1.3 m/s 2.6 m/s
H 2 µs 0.6 m/s 1.2 m/s
K 4 µs
0.3 m/s 0.6 m/s
L 8 µs
0.15 m/s 0.3 m/s
N 16 µs 0.078 m/s 0.158 m/s
P 24 µs 0.052 m/s 0.104 m/s
1) Connection between edge distance and counting frequency, see
appendix for table.
Tab. 6-2: BML-S1F...-M5...: Selection aid for maximum movement
speed
www.balluff.com
Resolution
E F G
5 µm 10 µm
20 m/s 20 m/s
2) 2)
10 m/s 10 m/s
5.41 m/s 5.41 m/s
2.95 m/s 2.95 m/s
1.54 m/s 1.54 m/s
0.79 m/s 0.79 m/s
0.34 m/s 0.34 m/s
0.19 m/s 0.19 m/s
0.13 m/s 0.13 m/s
Resolution
S G I
10 µm 20 µm
20 m/s 20 m/s
20 m/s 20 m/s
10.82 m/s 10.82 m/s
5.9 m/s 5.9 m/s
3.08 m/s 3.08 m/s
1.58 m/s 1.58 m/s
0.68 m/s 0.68 m/s
0.38 m/s 0.38 m/s
0.26 m/s 0.26 m/s
If using the reference sensor, the max.
movement speed is limited to 10 m/s.
The following applies for 4x evaluation (each edge is
counted):
Counting frequency of the
≥
controller
Period frequency =
Example: edge distance = 1 µs
Counting frequency = 1 MHz
Period frequency = 250 kHz

Important!

– The controller/display must be able to count
the minimum timed edge distances indicated
in the tables (note the counting frequency of
the controller!).
– The min. edge distance can even occur at a
standstill due to the internal interpolation
process.
– Always select the next-higher movement
speed or the next-faster min. edge distance,
otherwise position detection errors may be
created by the controller during evaluation.
Sensor head design for controlling with 4x
evaluation:
Example 1: BML-S1F...-M3...
Required resolution: 5 µm
Max. movement speed: 7 m/s
► In Tab. 6-1: select column F.
► Select the row 10 m/s in column F.
⇒ Edge distance E = 0.29 µs.
Example 2: BML-S1F...-M3...
Required resolution: 10 µm
Max. counting frequency of the controller: 0.5 MHz
Edge distance: 2 µs
► In Tab. 6-1: select row H in column G.
⇒ Maximum possible movement speed: 1.54 m/s
Coding in the type code breakdown
BML-S1F1-Q61_-M310-G_0-KA05 (example)
Resolution
For further information, see Type code
breakdown on pages 22 and 23.
1
Min. edge distance
Counting frequency
4
Min. edge distance
english 17