SIGNAL WORD
4 Installation and connection
Note:
Orient sensor head and tape so that the arrow on the sensor head part label (see Fig. 12-1 on page 37) points in the same direction as the arrow on the tape (see Fig. 3-2 on page 8).
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Installation and connection (continued) 4.1.1 Distances and tolerances+Yaw
–Yaw a Y
Tangential point1) 35.2
Z a
Z
45 –Pitch
+Pitch Active measuring surface
Free area of magnetizable material
Travel direction forwards, A before B, SSI or BiSS position increasing with rising output, decreasing with falling output
Fig. 4-1: Distances and tolerances Application
range Distance a
[mm] Magnetic tape Area without
tape Cover
strip Lateral
offset Y 2) Pitch Yaw Roll
Linear 60.1
see sec. 10.1
3)
4)
3±0.5 mm ≤ ±0.5° ≤ ±0.2° ≤ ±0.5°
Arc (< 360°) 60.1±0.5 > 60 mm 3)
Ring (> 360°) 52.4±0.5 Ring on request – –
Tab. 4-1: Dimensions and angles for linear, arc and ring applications Application Diameter Z2), 4)
Linear – 0.2…0.8 mm
Arc-shaped motion (< 360°)7), Ring (> 360°)8)
243 mm5), 6) ≤ 0.1 mm
300 mm6) ≤ 0.1 mm
400 mm ≤ 0.2 mm
500 mm ≤ 0.3 mm
600 mm ≤ 0.4 mm 7)
700 mm ≤ 0.5 mm 7)
800 mm ≤ 0.5 mm 7)
1000 mm ≤ 0.6 mm 7)
1500 mm ≤ 0.6 mm 7)
2000 mm ≤ 0.7 mm 7)
Tab. 4-2: Permissible air gap for linear, arc and ring shaped motion
5 5
+Roll –Roll
1) For arc and ring application
2) A larger air gap Z can be achieved with lateral offset Y is less.
3) Inserting and retracting the tape is possible. When inserting the tape the sequence begins as described in section 5.4 on page 18.
4) Air gap without cover tape. When using the cover tape Z is reduced by 0.15 mm.
5) For ring application only
6) Only possible without cover tape.
7) Optimal conditions (no cover tape) where Z = 0.4 mm
8) Rings of diameter 243 mm and larger (BML-M38-A50-A0-M243/210-E) are available.
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Installation and connection (continued) 4.1.2 Assembling the magnetic tape(Magnetic tape is not included in the scope of delivery.) For a complete technical description and assembly instructions for magnetic tapes, please see the magnetic tape user’s guide on the Internet at www.balluff.com.
Ideally, the system should include a groove or a stop edge for the magnetic tape which clearly defines its lateral position. If this stop edge is not present, the tape can be placed centered beneath the sensor head using the BAM TO-ML-006-S1G installation aid (Accessories, page 31) for linear motion or BAM TO-ML-018-01
(Accessories, page 31) for rotary motion.
For rotary motion a gap of at least 60 mm must be left at the ends of the tape. The motion range when using a sensor head is < 360°. Motion ranges of > 360° are possible if two sensor heads are used and both are processed by the controller.
If insulators are used (see section. 4.1.3 on page 12), they must be plugged in to the sensor head before the tape is installed.
NOTICE
Damage to the magnetic tape
Hard tools may cause damage to the magnetic surface of the magnetic tape. Even damage that appears slight (e.g.
scratches, dents) can affect the function and linearity.
► Do not use hard tools to install the magnetic tape!
► Replace damaged magnetic tapes.
For safe operation, the magnetic tape must protrude ≥ 5 mm from the bottom of the housing in both end positions.
Installing tapes for linear motion
1. Optionally: insert insulators (see sec. 4.1.3).
2. Attach installation aid BAM TO-ML-006-S1G (Accessories, page 31) to the left or right side of the sensor head using screws (see Fig. 4-2).
3. Thoroughly remove any oil, grease, dust, etc. (use acetone or similar) from the mounting surface of the tape and allow to dry completely.
4. Align the magnetic tape corresponding to the print (see Fig. 3-2 on page 8).
5. Position the sensor head on the back end of the magnetic tape to be applied (beginning of the measuring range).
6. Remove the protective film on the rear end of the magnetic tape and lightly apply the magnetic tape.
7. Remove another section of the protective film.
8. Move the sensor head forward a bit while applying the magnetic tape flush with the installation aid (see Fig. 4-2).
9. Lightly press the magnetic tape down by hand behind the sensor head.
10. Optionally: To protect the magnetic tape from
mechanical and chemical influences, affix the stainless steel cover strip (for details, see the magnetic tape instructions). Carefully clean the magnetic tape beforehand (dry cloth, acetone, turpentine, mild plastic cleaner, no benzine) to ensure the secure adhesion of the cover strip.
11. Remove the installation aid.
Installation aid
Sensor head
Machine part
Magnetic tape
Mounting surface
Apply the magnetic tape flush with the installation aid
Fig. 4-2: Fastening installation aid BAM TO-ML-006-S1G (order code BAM0256)
(left- or right-sided fastening is possible, figure shows right-sided fastening)
Installing tapes for rotary motion
Fig. 4-3:
1 2 3
4
5 b
a
Installing the tape on a shaft
1. Thoroughly remove any oil, grease, dust, etc. (use acetone or similar) from the mounting surface of the tape and allow to dry completely.
2. Optionally: insert insulators (see sec. 4.1.3).
3. Attach installation aid BAM TO-ML-018-01 (1) and sensor head (2) to the machine using the screw (3) (see Fig. 4-3).
4. Align tape (4) with the sensor head as indicated by the imprint (arrow, arrow on part label).
5. Feed tape (4) between the surfaces (c), (d) of the installation aid (see Fig. 4-4) by turning the shaft (5) in the direction of the arrow (see Fig. 4-3).
d c
d c
Fig. 4-4: End stops for tapes
6. At approximately position (a) (a few cm behind the sensor head) remove the protective film and glue the tape to the shaft.
7. Remove protective film up to the sensor head (approximately position (b)). Turn the shaft (5) back again (opposite direction from the arrow) if needed.
8. Turn shaft in the direction of the arrow. Stick the rest of the tape behind the sensor head as far as the end of the shaft.
9. Optional: Glue cover strip to the tape as a protection against mechanical and chemical effects.
10. Optional: Fasten tape (including cover strip) to the ends using screws (see manual for tape).
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Installation and connection (continued)4.1.3 Insert insulators
(optional accessory, BAM TO-ML-014-01) Insulators are included in the installation accessories BAM TO-ML-014-01 (see section 10.5 on page 31).
With increased EMC requirements, the sensor head can be assembled in a way to insulate it completely from the machine using two insulators. This requires two M3 threaded holes on the machine part.
► Insert the two insulators into the 4.3 mm holes on the sensor head to the left and right.
Fig. 4-5:
25
1
32.2
3.2
Insulator
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Installation and connection (continued) 4.1.4 Assembling the sensor headThe sensor head can be installed with or without insulators. For the selection of screws, torques, etc., see Tab. 4-3.
Screws and washers included with mounting accessories (see section 10.5 on page 31).
For rotary movements the use of the installation aid BAM TO-ML-018-01 is strongly
recommended (see Installing sensor head for arc-shaped applications (rotary motion < 360°) and Installing sensor head for ring applications (rotation motion ≥ 360°) on page 14).
Without insulator With insulator
Screw M4 cylinder screw (8.8) M3 cylinder screw (8.8)
Washer No yes
Mounting screws tightening torque 1.8…2.0 Nm 1.1…1.3 Nm
Recommended minimum thread length in steel 4 mm (screw M4x20) 3 mm (screw M3x20) Recommended minimum thread length in aluminum 10 mm (screw M4x25) 7.5 mm (screw M3x25) Tab. 4-3: Sensor head installation
Preparations
1. Provide for threaded holes on the machine part, see Tab. 4-3.
2. Optionally: insert insulators (see sec. 4.1.3).
Installing sensor head for linear motion
1. Fasten the left or right side of the sensor head to the machine member while observing the distances and tolerances (see Fig. 4-1) (see Fig. 4-6 and Fig. 4-7).
2. Secure the screws against unintended loosening (e.g.
with locking paint).
Fig. 4-6:
M4
16 +0.2
Machine part
Installing sensor head (without insulators)
Fig. 4-7: Installing sensor head with M3
16 +0.2 17.4 ±0.2 Machine part
Insulator
insulators
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Installation and connection (continued) Installing sensor head for arc-shaped applications (rotary motion < 360°)For rotary movements the use of the installation aid BAM TO-ML-018-01 is strongly
recommended.
Installing sensor head on shaft
For arc-shaped applications the motion range is < 360°
(arc-shaped measuring range).
1. Attach installation aid BAM TO-ML-018-01 (1) and sensor head (2) to the machine using the screw (3).
2. Loosely attach sensor head directly to the machine (4).
3. Place spacer film (5) between sensor and installation aid.
4. Position installation aid so that the sensor head is flush at the rear with the line on the installation aid (6).
5. Align installation aid symmetrical to the shaft (7a, 7b).
6. Place sensor head against installation aid and shaft and fasten using screw (3).
7. Fasten sensor head using screw (4).
8. Check whether installation aid is symmetrical with the shaft (7a, 7b) and sensor head is flush with the line in back (6).
9. Remove distance gauge (5).
10. Loosen screw (3) and remove installation aid in the axis direction.
11. Use screw (3) to attach sensor head to the machine.
12. Secure the screws against unintended loosening (e.g.
with locking paint).
Installing sensor head for ring applications (rotation motion ≥ 360°)
For rotary movements the use of the installation aid BAM TO-ML-018-01 is strongly
recommended.
Installing sensor head on ring
For ring applications the movement range of the ring is
≥ 360°.
Example: Ring BML-M38-A50-A0-M243/210-E Other rings available on request.
1. Install ring and if needed adjust so that it is centered.
The distance to the sensor may change by max.
±0.1 mm.
2. Attach installation aid BAM TO-ML-018-01 (1) and sensor head (2) loosely to the front of the machine using the screw (3).
3. Loosely attach sensor head directly to the rear of the machine (4).
4. Place spacer film (5) between sensor head and