Rev Up for 2026: NIMS CNC Operator Challenge – Unleash Your Precision Power!

The correct choice is M88, which is specifically designated for activating high-pressure coolant in CNC machines. High-pressure coolant systems are often used in machining processes to enhance tool life, improve surface finish, and facilitate chip removal, particularly in operations that generate significant heat and friction. By using M88, the operator can initiate this high-pressure coolant flow at the spindle, ensuring effective cooling and lubrication during the machining process.

This distinguishes M88 from the other codes: M09 is used to turn off coolant; M08 typically activates flood coolant, which is generally lower in pressure; and M07 is meant for mist coolant, which is also not high-pressure. Each of these codes serves a different purpose in managing coolant application during CNC operations, which is critical for maintaining efficiency and workpiece quality.