G-Code

Question 1

What is G54?

Answer 1

The absolute position (workshift position 1)

Question 2

What does T08 do?

Answer 2

Select tool 8

Question 3

What is “;” used for?

Answer 3

Ending a block

Question 4

What are G functions and what do they do?

Answer 4

They’re preparatory functions which allow the function of any part of machine

Question 5

What do M functions do?

Answer 5

Miscellaneous functions allow misc. functions like turning on coolant

Question 6

What is represented by XYZABC?

Answer 6

The axis

Question 7

What is S?

Answer 7

Spindle speed

Question 8

What are D and R?

Answer 8

Diameter and radius

Question 9

What is F?

Answer 9

Feed rate

Question 10

What is N?

Answer 10

Sequence/line/block number

Question 11

What is G0?

Answer 11

Rapid function

Question 12

What is G1?

Answer 12

Linear move

Question 13

What is G90?

Answer 13

Absolute position mode

Question 14

What is G17?

Answer 14

The xy plane

Question 15

What are G21 and G20?

Answer 15

G21 = metric mode
G20 = imperial mode

Question 16

What is G40?

Answer 16

CRC (cutter radius compensation) cancel

Question 17

How do you end a program?

Answer 17

M30
% (for older machines)

Question 18

What do EQ, GT, LT, GE, LE and NE mean?

Answer 18

Equal to, greater than, less than, greater or equal to, less than or equal to, not equal to

Question 19

What is G02?

Answer 19

Clockwise arc

Question 20

What do I and J relate to in G02?

Answer 20

I relates to X, J relates to Y