Extending Tapes With 5 Mm Or 10 Mm Pole Width; (Bml-M0_-I4; Procedure - Balluff BML-M0 Série Notice D'utilisation

BML-M0 _ -... / BML T _ _ -...
Magnetic Tape – Magnetic Encoder System
4
Installation (continued)
4.9 Extending tapes with 5 mm or 10 mm pole
width (BML-M0_-I4..., BML-M0_-I6...,
BML TS_-I5..., BML TS_-IA...)
Tapes are shipped in the length specified in the type code
(see section 7 starting page 19). If longer measuring
lengths are needed, tapes with 5 or 10 mm pole width can
be strung together (BML-M0_-I4..., BML-M0_-I6...).
The smaller the distance between the two tapes and the
more precisely positioned the extending tape, the less the
magnetic non-linearity at the joint.
The dimensioning shown in Fig. 4-7 to Fig. 4-12
refers to a tape with 5 mm pole width. For 10
mm pole width double the indicated
dimensions.
4.9.1

Procedure

Cut both ends of the tape straight at the joint
(Fig. 4-7 and Fig. 4-8)!
1. Tape M1 is already bonded. Fasten a side stop at the
joint so the next tape M2 can be precisely aligned
(Fig. 4-7).
M1
S N S N S N S
Fig. 4-7: Top view of tape
M1
S
S N S N S N
Fig. 4-8: Side view
2. Cut off approximately 10 cm of tape M2 to use as an
aid tape to correctly position the loose tape.
M2
S N S N S N S
Side stop
M2
S S
S N S N N
3. Turn the aid tape around and place it on tape M1. The
aid tape will be engaged by the magnetic forces from
the opposite pole (Fig. 4-9).
To find the position with the maximum attraction, move
the aid tape by approx. 1 mm in both directions until
you find the area with the maximum attraction.
The aid tape must be fixed in the position using e.g.
adhesive tape.
Tip:
To easily achieve a stable position (max.
attraction), place a thin layer, e.g. paper,
between M1 and the aid tape to reduce
friction. As soon as a stable position has
been found, carefully pull out the paper
and attach the magnetic tape using
adhesive tape.
Adhesive tape
B
M1 ~1 mm
S S N N S
N
S N S N S N N S S
Fig. 4-9: Tape M2 to be attached, underneath the aid tape, d =
4–10 mm
4. Slide the beginning of the second tape M2 under the
aid tape until it is near tape M1 and let it engage
(Fig. 4-9). Leave enough distance (d) to M1, e.g. 4–10
mm.
5. Slide the second tape M2 under the aid tape in both
directions until you find the area with the maximum
attraction. Fasten tape M2 in this stable position using
adhesive tape. Remove the aid tape (Fig. 4-10). M1
and M2 are now aligned polysynchronous.
F
Remove aid tape
N S S N S
S N S N S N N S
~1 mm
Fig. 4-10: Make three marks a, b, and c
6. Mark tape M2 and the machine part at any position (a)
(Fig. 4-10).
Starting from this mark, in the direction of the joint
make two further marks (b and c) at a distance of 1
pole pair each (10 or 20 mm) just on the machine part.
Aid tape
A
~1 mm M2
N S N S
C
S N S N S N S
d
Adhesive
tape
E
N S
N S a
D
S N S N S N N S
~1 mm
10 mm 10 mm
c a
b
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