CNC Machine Safety 2

Question 1

What is the primary purpose of a CNC machine's E-stop (emergency stop) button?

Accepted Answer

Immediately cut all machine motion and spindle power

Answer

The E-stop immediately cuts power to all motion axes and the spindle to halt the machine in a dangerous situation.

Question 2

When should a CNC operator check the workpiece clamping before running a program?

Accepted Answer

Before every new program run

Answer

Clamping must be verified before every program run to prevent workpiece ejection during cutting.

Question 3

Which type of CNC guard is designed to stop chips and coolant from exiting the machining envelope?

Accepted Answer

Full enclosure splash guard

Answer

Full enclosure splash guards contain chips, coolant, and any ejected debris within the machine's work envelope.

Question 4

What should a CNC operator do if an unusual vibration or noise occurs during a cutting operation?

Accepted Answer

Stop the machine and investigate before restarting

Answer

Unusual vibration or noise can indicate tool breakage, poor fixturing, or machine faults, all of which require the machine to be stopped and inspected.

Question 5

Why is it dangerous to wear gloves when operating a CNC lathe with rotating workpieces?

Accepted Answer

Gloves can catch on the rotating chuck and pull the hand in

Answer

Loose gloves can snag on a spinning chuck or workpiece and pull the operator's hand into the machine.

CNC - Cutting Practice Test

CNC - Cutting Practice Test

CNC Machine Safety 2