7. Remove the imbalance. To do this, screw one or several balancing screws into the rotor. Start
at the side with the highest absolute imbalance. For instance, if you detect an imbalance at
the DE at an angle of 175°, then you must screw in a balancing screw on the opposite side at
an angle of 355° (175°+180°=355°).
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8. It may be necessary to repeat Point 6 and Point 7 several times until the imbalance has been
completely removed.
4.10 Vibration response
4.10.1 Mounting and mounting instructions
In order to ensure smooth, vibration-free motor operation, a stable foundation design is
required, the motor must be precisely aligned, and the components that are to be mounted on
the shaft extension must be correctly balanced.
The following mounting instructions must be carefully observed:
• For high-speed machines, we recommend that the complete unit is dynamically balanced
after couplings or belt pulleys have been mounted.
• Use suitable equipment when mounting drive elements. Use the thread at the shaft
extension.
• Do not apply any shocks or axial pressure to the shaft extension.
• Especially for high-speed motors with ange mounting, it is important that the mounting is
sti in order to locate any natural frequency as high as possible so that it remains above the
maximum rotational frequency.
Mechanical properties
4.10Vibration response
1PH8 SIMOTICS M main motors
146 Conguration Manual, 12/2022, A5E51895839A
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