What are machine guards primarily designed to do?

Machine guards are primarily designed to protect operators from moving parts. The main purpose of these guards is to create a barrier that prevents workers from coming into direct contact with hazardous areas of machinery, such as rotating blades, gears, and other moving components. By safeguarding operators, machine guards significantly reduce the risk of accidents and injuries, ensuring a safer working environment.

The other options relate to functions that are not the primary purpose of machine guards. Enhancing the speed of machinery does not align with the safety function of machine guards, which focuses on protection rather than performance improvement. Improving print quality and reducing ink wastage are more relevant to the operational facets of printing equipment and do not pertain to the safety mechanisms required to mitigate risks associated with moving machinery parts.