A soft foot condition on a motor mount should be corrected by __________.

In addressing a soft foot condition on a motor mount, the recommended approach is to shim one foot only. This practice is rooted in the mechanics of alignment and the need for a stable and even foundation for the motor. When one foot is shimmed, it compensates for the unevenness that is causing the soft foot condition.

The rationale behind shimming just one foot lies in the principle of maintaining balance and minimizing distortion of the motor's base. By elevating only the foot that is causing an issue, you can level the mount without introducing additional stress or misalignment to the motor. This method helps ensure proper alignment and, therefore, optimal performance of the motor once it is in operation.

Shimming all four feet or two diagonally opposite feet may create further imbalances or stress on the motor and its mount. It is essential to address the specific source of the soft foot condition to achieve the best results. Correctly identifying and shimming one foot appropriately will help achieve a solid, stable motor mount without the adverse effects that could arise from other shimming strategies.