5.4 Aligning and fixing the machine
5.4.1 Preconditions for correct alignment and secure attachment
To align the machine correctly and fasten it securely, you require detailed specialist knowledge
of the following necessary measures:
● Preparing the foundation
● Select and mount the coupling
● Measure the radial and axial eccentricity
● Position the machine
If you are not familiar with the prescribed measures and procedures, make use of the services
offered by the Service Center (Page 153).
Observe the following when aligning and mounting:
● Ensure a flat and uniform contact surface for foot and flange mounting.
● When mounting on the wall, support the machine from below, e.g. using a bracket, or bolt
it.
● Precisely align the machine when couplings are used.
● Ensure that the mounting surfaces are clean and free of any dirt.
● Remove any anti-corrosion protection using white spirit.
● Avoid installation-related resonances with the rotating frequency and twice the line
frequency.
● Note any unusual noise when the rotor is manually turned.
● Check the direction of rotation with the motor uncoupled.
● Avoid rigid couplings.
● Repair any damage to the paint, this must be done immediately and correctly.
5.4.2 Positioning the motor vertically and horizontally
The following measures are required in order to compensate any radial offset at the coupling
and to horizontally adjust the electrical machine with respect to the driven load:
● Vertical positioning
For vertical mounting positions, avoid deforming the machines by placing shims under the
mounting feet. Keep the number of shims low; only use a few stacked shims.
● Horizontal positioning
To position the machine horizontally, shift it sideways on the foundation and ensure that the
axial position is maintained (angularity error).
● When positioning the motor, ensure that a uniform axial gap is maintained around the
coupling.
Assembly
5.4 Aligning and fixing the machine
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A 57
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