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Structure
8.1
Gantry
8.1.1
Common magnetic track
8.1.2
Version: 1.7
Ensure synchronization of coupled coil parts
Ensure that the coupled coil parts move synchronously.
Rigidly coupled coil parts can cause non-synchronous movements
which can lead to tension and damage to the mechanical system
and the coil part.
Only use parallel connection for coupling coil parts
Coil parts should only be coupled in a parallel connection. Series
connection is not permitted.
Failure to observe this may cause a cable fire and result in damage
to the coil part and connected components.
You have the possibility to couple individual coil parts with the same
installation width and the same force constants. The total force is
determined by adding the forces of the coupled coil parts. The mo-
tors are connected in parallel to the servo drive, which leads to
higher sum currents. In coupled operation , maintain special dis-
tances between coil parts and the dependent wiring.
You have the possibility to couple the linear motors in two different
ways. These are described in the following chapter.
8.1.1
In a gantry structure, two parallel magnetic tracks each have a coil
part. The coil parts are rigidly coupled and electrically connected in
parallel. The movements are synchronized. Synchronization must
be maintained at the best possible level even in the event of a drive
error.
All coil parts in the gantry structure must respond almost instanta-
neously to any drive faults.
The existing communication time from the faulty drive to the NC or
CNC and from there to all other coil parts is overridden by the elec-
trically parallel switching.
8.1.2
With this type of coupling, the coil parts are arranged one after the
other on a common magnetic track. This type of coupling tends to
be used for applications with long strokes, since a second magnetic
track with associated costs is avoided.
By coupling two coil parts of the next smaller series, the force re-
quired for the application can be achieved and thus the width of the
magnetic track can be reduced.
AL8000
Coupling
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73
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