Sample G Code Test

The Gcode Test will be Closed Book

• What two types of programming modes can be used to specify tool position? How do they

differ?

• Describe climb milling.

• Describe conventional milling.

• What is the principle purpose of a center drill? Why is a center drill needed?

• What is the principle purpose of a V-block?

• What is a bilateral tolerance?

• What is a symmetric tolerance?

• What is G Code?

• Explain the difference between modal and non-modal G codes.

• Describe what an M code does.

• Explain the effect of each of the following blocks of code:

O1000
T1 M6
G0 G90 G40 G21 G17 G94 G80
G54 X-75 Y-25 S500 M3  
G43 Z100 H1
Z5
G1 Z-20 F100
X-50 M8               
Y0                    
X0 Y50               
X50 Y0               
X0 Y-50              
X-50 Y0              
Y25                  
X-75                  
G0 Z100
M30
 

Find the errors in the following code:

O10075
N1 T16 M06
N2 G90 G54 G00 X0.5 Y-0.5
N3 S1450 M03
N4 G43 H16 Z1. M08
N5 G81 G99 Z-0.375 R0.1 F9
N6 X1.5
N7 Y-1.5
N8 X0.5
N9 G80 G00 Z1. M09
N10 G53 G49 Z0. M05
N11 M30


 

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