Soft foot corrective action usually requires what step?

Soft foot corrective action usually requires what step?

• A. Replacing the motor
• B. Installing shims to bring all feet into contact
• C. Repainting the base
• D. Ignoring it

Answer: (B)

Soft foot means one or more feet of the motor or equipment aren’t fully seated on the base, so the load isn’t evenly distributed. That uneven support causes misalignment and vibration as soon as the system runs. The correct corrective action is to install shims under the feet that aren’t in full contact or adjust existing shims until all feet bear load evenly and the base is flat. In practice, you identify which feet are high or low, loosen the mounting bolts enough to seat the machine, place the appropriate shim thickness under the high feet, and then tighten the bolts in a crisscross sequence to maintain even loading. After shimming, recheck alignment and runout to confirm the change. Replacing the motor or repainting the base won’t fix the underlying contact issue, and ignoring it allows vibration and wear to continue.

Soft foot means one or more feet of the motor or equipment aren’t fully seated on the base, so the load isn’t evenly distributed. That uneven support causes misalignment and vibration as soon as the system runs. The correct corrective action is to install shims under the feet that aren’t in full contact or adjust existing shims until all feet bear load evenly and the base is flat. In practice, you identify which feet are high or low, loosen the mounting bolts enough to seat the machine, place the appropriate shim thickness under the high feet, and then tighten the bolts in a crisscross sequence to maintain even loading. After shimming, recheck alignment and runout to confirm the change. Replacing the motor or repainting the base won’t fix the underlying contact issue, and ignoring it allows vibration and wear to continue.