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Assembly
5.4 Alignment and mounting
• 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.
5.4.1
Measures for alignment and mounting
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.
• Smooth running
Preconditions for smooth, vibration-free operation:
– Stable foundation design free of any shock or vibration.
– A precisely aligned coupling.
– A well-balanced drive output element (coupling, belt pulleys, fans, ...)
Maintain the maximum permissible vibration values in operation according to ISO 10816-3.
Avoid inadmissible vibration caused by imbalance, for example (drive output element),
external vibration or any resonance over the complete speed range.
It may be necessary to completely balance the machine with the drive output element or the
system resonance frequency must be shifted.
• Foot mounting/flange mounting
– Use the specified thread size laid down in EN 50347 when flanging the machine to a
– Mount the machine at all the foot or flanged holes provided. The choice of fixing elements
– Select the correct screw length for IM B14 flanges.
– Ensure that the screw heads are in full contact with the flange surface. Use additional flat
50
foundation or a machine flange.
depends on the foundation and is the plant operator's responsibility. Comply with the
required property classes for screwed connections and materials for fixing elements.
washers (ISO 7093), especially for elongated foot mounting holes.
1PC1423 roller-table motors SH 112 ... 400
Operating Instructions
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