BML-M0 _ -... / BML T _ _ -...
Magnetic Tape – Magnetic Encoder System
3
Construction and function (continued)
3.4.2
Reference points
Magnetic tapes are available for various referent point
functions.
Order items L1, L2, L3 are defined in the type
code (see section 7).
Pole-periodic magnetic tape
For sensor heads with pol-periodic reference point function
an incremental tape without reference points is used (see
Fig. 3-3).
Magnetic tape with single reference point
L2
jjwwDE
Reference point 1
Fig. 3-5:
Single reference point magnetic tape, single reference
point, optically marked
Magnetic tape with two reference points
L2
jjwwDE
Reference point 1
Fig. 3-6:
Magnetic tape with two reference points
Magnetic tape with fixed-periodic reference points
L1
L2
L3
L3
L3
jjwwDE
Fig. 3-7:
Magnetic tape with fixed-periodic reference points
L1
Code
L1
L3
Code
Reference point 2
...
L3
L3
Code
Reference point
type
Pole-periodic
BML-M0...-R0000
BML T_ _-I...-1...
Single reference point BML-M0...-RXXXX /0000
BML T_ _-I_ _ R-_ _ _ _-_ _ _ _ _-XXXX
Two reference points BML-M0...-RXXXX /YYYY
BML T_ _-I_ _
D-_ _ _ _-_ _ _ _ _-XXXX-YYYY
Fixed-periodic
BML-M0...-CXXXX /YYYY
reference points
BML T_ _-I_ _
C-_ _ _ _-_ _ _ _ _-XXXX-YYYY
XXXX = L2 and YYYY = L3
1)
Tab. 3-2:
Tapes for reference point function
Type code
1)
1)
1)
1)
1)
english
9