The following table shows the possible causes of and remedial measures for mechanical
↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults
Rotating parts are grinding
Reduced air supply, direction of rotation of fan pos‐
Rotor not balanced
Rotor out of true, shaft bent
Coupled machine not balanced
Shocks from coupled machine
Fault originating from gearing
Resonance of the overall system comprising motor
Changes in foundation
Note any changes taking place during warm up
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017
Establish the cause and realign the parts.
Check the air ducts; clean the machine.
Decouple the rotor and then rebalance it.
Please consult the manufacturer.
Align the machine set and check the coupling
Rebalance the coupled machine.
Investigate the coupled machine.
Fix the gearing.
Reinforce the foundation after consultation with the
Determine the cause and rectify it. Realign the ma‐