CNC G-Code & M-Code Programming 2

Question 1

Which G-code cancels cutter radius compensation?

Accepted Answer

G40

Answer

G40 cancels cutter radius compensation (left or right) that was previously activated.

Question 2

What does the address 'F' specify in a CNC program?

Accepted Answer

Feed rate

Answer

The F address defines the feed rate, typically in inches per minute (IPM) or millimeters per minute (mm/min).

Question 3

M06 is used to command which machine function?

Accepted Answer

Tool change

Answer

M06 initiates an automatic tool change on CNC machining centers.

Question 4

In G-code, what does G17 specify?

Accepted Answer

XY plane selection

Answer

G17 selects the XY plane, which is required for circular interpolation arcs in that plane.

Question 5

Which M-code turns the spindle on in the counter-clockwise direction?

Accepted Answer

M04

Answer

M04 starts the spindle rotating in the counter-clockwise (CCW) direction.

(CNC) Computer Numerical Control Machinist Technical Practice Test