Practice - 5 Tasks
Answer the questions below
1fill in blank
easyComplete the code to start a drilling cycle with G81.
CNC Programming
G81 [1] Z-10.0 R2.0 F100;
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Using coordinates outside the workpiece area.
Omitting the X and Y coordinates.
✗ Incorrect
The drilling cycle starts at the coordinate X0 Y0 with G81.
2fill in blank
mediumComplete the code to set the retract plane height in the drilling cycle.
CNC Programming
G81 X10 Y10 Z-15.0 [1] F150;
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Setting R too low causing tool crashes.
Omitting the R parameter.
✗ Incorrect
R3.0 sets the retract plane 3 mm above the surface for safe retraction.
3fill in blank
hardFix the error in the drilling cycle command to correctly specify feed rate.
CNC Programming
G81 X20 Y20 Z-12.0 R2.0 [1];
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Using S instead of F for feed rate.
Omitting feed rate causing default slow feed.
✗ Incorrect
F200 sets the feed rate to 200 mm/min, which is required for drilling feed speed.
4fill in blank
hardFill both blanks to complete the drilling cycle with correct coordinates and depth.
CNC Programming
G81 X[1] Y[2] Z-8.0 R1.5 F120;
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Swapping X and Y values.
Using coordinates outside the machine limits.
✗ Incorrect
X10 and Y20 specify the hole position; Z-8.0 is the drilling depth.
5fill in blank
hardFill all three blanks to create a drilling cycle with uppercase G code, correct feed, and retract height.
CNC Programming
[1] X30 Y30 Z-20.0 [2] R[3];
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Using lowercase g81 instead of uppercase G81.
Omitting feed rate or retract height.
✗ Incorrect
G81 must be uppercase; F250 sets feed rate; R3.0 sets retract height.