Practice - 5 Tasks

Answer the questions below

1fill in blank

easy

Complete the code to move the milling tool along the X axis to position 50.

CNC Programming

G01 [1]50 F100

Drag options to blanks, or click blank then click option'

Attempts:

3 left

💡 Hint

Common Mistakes

Using Y or Z instead of X for horizontal movement.

Confusing feed rate (F) with axis movement.

✗ Incorrect

The X axis controls horizontal movement left and right. To move to position 50 on X, use 'X50'.

2fill in blank

medium

Complete the code to move the tool up along the Z axis to position 10.

CNC Programming

G00 [1]10

Drag options to blanks, or click blank then click option'

Attempts:

3 left

💡 Hint

Common Mistakes

Using X or Y instead of Z for vertical movement.

Confusing feed rate (F) with axis movement.

✗ Incorrect

The Z axis controls vertical movement. To move up to position 10, use 'Z10'.

3fill in blank

hard

Fix the error in the code to move the tool to X=20, Y=30, Z=5.

CNC Programming

G01 X20 Y[1] Z5 F150

Drag options to blanks, or click blank then click option'

B30

C20

D150

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the wrong number for Y coordinate.

Mixing feed rate (F) with axis values.

✗ Incorrect

The Y axis value should be 30 to move to Y=30. The blank is for the Y coordinate.

4fill in blank

hard

Fill both blanks to create a command moving the tool to X=15 and Z=7.

CNC Programming

G01 [1]15 [2]7 F120

Drag options to blanks, or click blank then click option'

Attempts:

3 left

💡 Hint

Common Mistakes

Using Y instead of X or Z.

Confusing feed rate (F) with axis letters.

✗ Incorrect

X15 moves the tool to X=15, and Z7 moves it to Z=7 vertically.

5fill in blank

hard

Fill all three blanks to create a command moving the tool to X=25, Y=40, Z=10.

CNC Programming

G01 [1]25 [2]40 [3]10 F200

Drag options to blanks, or click blank then click option'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up axis letters and coordinates.

Using feed rate (F) instead of axis letters.

✗ Incorrect

X25 moves horizontally to 25, Y40 moves sideways to 40, and Z10 moves vertically to 10.

Practice

(1/5)

1. Which axis controls the up and down movement of the milling tool in CNC programming?

easy

A. Y axis

B. Z axis

C. X axis

D. A axis

Solution

Step 1: Understand axis directions in milling
The X and Y axes control horizontal movements, while the Z axis controls vertical movement.
Step 2: Identify the axis for up and down movement
The Z axis moves the tool up and down, controlling cutting depth.
Final Answer:
Z axis -> Option B
Quick Check:
Z axis = vertical movement [OK]

Hint: Remember Z is vertical, X and Y are horizontal [OK]

Common Mistakes:

Confusing X or Y for vertical movement
Thinking A axis is vertical
Mixing axis directions

2. Which of the following is the correct G-code command to move the tool in a straight line to X=10, Y=20, Z=-5?

easy

A. G02 X10 Y20 Z-5

B. G00 X10 Y20 Z-5

C. G01 X10 Y20 Z-5

D. G03 X10 Y20 Z-5

Solution

Step 1: Identify G-code commands for movement
G01 is used for linear (straight line) movement at controlled feed rate. G00 is rapid move, G02 and G03 are circular moves.
Step 2: Match command with desired straight line move
To move in a straight line to X=10, Y=20, Z=-5, use G01 with those coordinates.
Final Answer:
G01 X10 Y20 Z-5 -> Option C
Quick Check:
G01 = linear move [OK]

Hint: G01 means straight line move, G00 is rapid move [OK]

Common Mistakes:

Using G00 for cutting moves
Confusing G02/G03 with linear moves
Omitting Z coordinate

3. What will be the final position of the tool after executing the following commands?

G01 X5 Y5 Z0
G01 X10 Y5 Z-3
G01 X10 Y10 Z-3

medium

A. X=10, Y=10, Z=-3

B. X=10, Y=5, Z=-3

C. X=5, Y=5, Z=-3

D. X=10, Y=10, Z=0

Solution

Step 1: Trace each G01 command's effect on position
First move: X=5, Y=5, Z=0. Second move: X=10, Y=5, Z=-3. Third move: X=10, Y=10, Z=-3.
Step 2: Identify final coordinates after last command
The last command sets position to X=10, Y=10, Z=-3.
Final Answer:
X=10, Y=10, Z=-3 -> Option A
Quick Check:
Final position = last command coordinates [OK]

Hint: Last G01 command sets final position [OK]

Common Mistakes:

Ignoring Z coordinate changes
Mixing up command order
Assuming position resets

4. Identify the error in this CNC code snippet:

G01 X15 Y10
G01 Z-2
G01 X20 Y15 Z-2

medium

A. Missing Z coordinate in first line causes unexpected Z position

B. Z coordinate cannot be negative

C. G01 cannot be used multiple times consecutively

D. X and Y coordinates must be integers

Solution

Step 1: Analyze the first G01 command
The first line moves X and Y but omits Z, so Z stays at previous value (unknown or last set).
Step 2: Understand impact of missing Z coordinate
Omitting Z means the tool may not move vertically as expected, causing potential errors in cutting depth.
Final Answer:
Missing Z coordinate in first line causes unexpected Z position -> Option A
Quick Check:
Omitting axis coordinate keeps previous value [OK]

Hint: Always specify Z if vertical position changes [OK]

Common Mistakes:

Thinking negative Z is invalid
Believing G01 can't repeat
Assuming coordinates must be integers

5. You want to mill a square pocket 10 units wide and 10 units long, starting at X=0, Y=0, and cutting down 2 units deep. Which sequence of commands correctly moves the tool to mill the pocket edges at depth?

hard

A. G00 Z-2 G01 X10 Y0 G01 X10 Y10 G01 X0 Y10 G01 X0 Y0 G01 Z0

B. G01 X0 Y0 G01 X10 Y0 G01 X10 Y10 G01 X0 Y10 G01 X0 Y0 G01 Z-2 G01 Z0

C. G00 Z-2 G01 X10 Y0 G01 X10 Y10 G01 X0 Y10 G01 X0 Y0 G00 Z0

D. G01 X0 Y0 Z-2 G01 X10 Y0 Z-2 G01 X10 Y10 Z-2 G01 X0 Y10 Z-2 G01 X0 Y0 Z-2 G01 Z0

Solution

Step 1: Set cutting depth before horizontal moves
To cut at depth, Z must be set to -2 before moving in X and Y axes.
Step 2: Move tool around square edges at constant depth
Commands must keep Z at -2 while moving X and Y to mill the pocket edges.
Step 3: Retract tool after finishing
Return Z to 0 to lift the tool safely after cutting.
Final Answer:
G01 X0 Y0 Z-2 G01 X10 Y0 Z-2 G01 X10 Y10 Z-2 G01 X0 Y10 Z-2 G01 X0 Y0 Z-2 G01 Z0 -> Option D
Quick Check:
Set Z depth first, move XY at depth, then retract [OK]

Hint: Set Z depth before XY moves, retract after [OK]

Common Mistakes:

Moving XY before setting Z depth
Using rapid moves (G00) for cutting
Changing Z during XY moves

Machine axes (X, Y, Z for milling) in CNC Programming - Interactive Code Practice

Practice

Solution

Step 1: Understand axis directions in milling

Step 2: Identify the axis for up and down movement

Final Answer:

Quick Check:

Solution

Step 1: Identify G-code commands for movement

Step 2: Match command with desired straight line move

Final Answer:

Quick Check:

Solution

Step 1: Trace each G01 command's effect on position

Step 2: Identify final coordinates after last command

Final Answer:

Quick Check:

Solution

Step 1: Analyze the first G01 command

Step 2: Understand impact of missing Z coordinate

Final Answer:

Quick Check:

Solution

Step 1: Set cutting depth before horizontal moves

Step 2: Move tool around square edges at constant depth

Step 3: Retract tool after finishing

Final Answer:

Quick Check:

Ready to prove it?