Milling week 13, 7th April 2025

Most accidents during CNC milling operations happen because of:

• worn-out machines

• lack of time

• negligence and carelessness

• poor lighting

Students with long hair must tie or pin it up and wear a:

• scarf

• hair cap or net

• beanie

• helmet

The Emergency Stop button is used to:

• cool down the spindle

• immediately stop the machine in emergencies

• switch from manual to auto

• reset the part program

G40 is used to:

• shift the tool to home position

• cancel cutter radius compensation

• initiate canned cycles

• compensate tool wear

In CNC programming, “N100” represents the:

• feed rate

• function code

• sequence number

• tool length offset

Which of the following items should NOT be worn during CNC milling operations?

• Safety goggles

• Safety shoes

• Jewelry

• • Hair net

One of the good housekeeping practices includes:

• Leaving tools on the table for the next user

• Returning tools to their original place

• Using water to clean the machine

• Placing oily rags on machines

When using sharp tools, you should handle them with:

• gloves or a shop cloth

• bare hands

• safety tongs

• a metal container

What should be done before cleaning or adjusting a machine?

• Switch to manual mode

• Switch off the machine

• Switch off the machine

• Run a test program

The Over Travel Check and Stroke Check help to:

• Start machining quicker

• Prevent the tool from exceeding stroke limits

• Improve surface finish

• Adjust coolant flow