Balluff BML SGA-AEZ1-LZZZ-ZU11-S115 Instrucciones Breves página 9

BML SGA-AEZ1-LZZZ-ZU11-S115
Absolute Magnetically Coded Position Measuring System
Construction and function (continued)
Assembling the magnetic tape
NOTICE
Damage to the magnetic tape
Hard tools may cause damage to the magnetic surface
of the tape. Even damage that appears slight (e.g.
scratches, dents) can affect linearity.
► Do not use hard tools to install the magnetic tape!
► Replace damaged magnetic tapes!
Magnetic tapes with an adhesive layer can be
attached using an installation aid (accessory)
(see user's guide).
Insulator
(optional accessories, BAM TO-ML-014-01)
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.
Assembling the sensor head
1. Fasten the right or left side of the sensor head to the
machine part taking into account the distances and
tolerances (see page 2).
2. Secure the screws against unintended loosening
(e.g. with locking paint).
Shielding and cable routing
Defined ground!
The position measuring system and the control
cabinet must be at the same ground potential.
Shielding/cable routing
To ensure electromagnetic compatibility (EMC), observe
the following:
– The cable shield must be grounded on the controller
side, i.e. connected to the protective earth conductor.
– When ducting the cable between the sensor, controller,
and power supply, it is important to avoid going near
high voltage cables due to interferences.
Stray noise from AC harmonics (e.g. from phase angle
controls or frequency converters) are especially critical
and the cable shield offers very little protection against
this.
– The cable must be routed tension-free.
Magnetic fields
The magnetic encoder system is a magnetically coded
system. Ensure sufficient separation between the magnetic
encoder system and strong external magnetic fields.
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Shielding and cable routing (continued)
Cable length
The maximum cable length according to the DRIVE-CLiQ
specification is 100 m.
Startup
DANGER
Uncontrolled system movement
When starting up, if the position measuring system is
part of a closed loop system whose parameters have not
yet been set, the system may perform uncontrolled
movements. This could result in personal injury and
equipment damage.
► Persons must keep away from the system's
hazardous zones.
► Startup must be performed only by trained technical
personnel.
► Observe the safety instructions of the equipment or
system manufacturer.
1. Check connections for tightness and correct polarity.
Replace damaged connections or devices.
2. Turn on the system.
3. Check function.
The BML is an absolute measuring system.
When the operating voltage is switched on, the
absolute position is immediately available
without the need for a reference run. The
sensor head may not be removed in direction Z
or Y from and replaced on the magnetic tape
during operation. An error message is output
immediately if lifted. If the sensor head is
returned, a valid signal is not output until a
movement of approx. 30 mm in direction X has
occurred or after 2 seconds. Leaving and
approaching the magnetic tape in the direction
of travel with a speed from 1 mm/s...5 m/s is
however permitted.
Preset
The magnetic tape has an absolute coding over a length of
48 meters. For shorter travel distances the position of the
sensor head at each desired position (Preset) can be
permanently set to a start value of 10 mm (recommended).
For a preset a voltage between 10 V DC and 30 V DC for
≥ 500 ms is applied to the corresponding pin. The current
position is then 10±1 mm.
Operating notes
– Check and record the function of the magnetic
encoder system and all associated components on a
regular basis.
– If there are malfunctions in the magnetic encoder
system, take it out of service and secure it against
unauthorized operation.
– Secure the system against unauthorized use.
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