The foundation should be set low by what distance to allow grouting of the machine base?

The foundation should be set lower to allow for the grouting of the machine base, which is essential for ensuring proper alignment and stability. The correct answer, which suggests a distance of 18 to 38 mm, aligns with industry standards for grouting applications.

Setting the foundation at this specific height allows for sufficient material to be applied underneath the machine base, ensuring full coverage and proper load transfer. Grout fills any gaps, helps to dampen vibrations, and enhances the overall integrity of the machine installation.

While other suggested distances may not effectively provide the necessary depth for adequate grouting, this range is optimal as it accommodates the grout's characteristics and allows enough material to create a solid bond without being excessively high or too low, which could compromise the effectiveness of the installation.