Approach and retract moves in CNC Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to move the tool safely to the start position above the workpiece.

CNC Programming

G00 Z[1] ; Move tool up to safe height

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

A5.0

B0.0

C-5.0

D10.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using Z=0.0 which may cause the tool to hit the workpiece.

Using negative Z values which move the tool down into the material.

The tool must move up to a safe height (e.g., 5.0) before moving horizontally to avoid collisions.

2fill in blank

medium

Complete the code to approach the workpiece vertically at a controlled speed.

CNC Programming

G01 Z[1] F100 ; Approach workpiece

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

A-5.0

B0.0

C5.0

D-1.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using Z=0.0 which may not reach the surface.

Using large negative values which may cut too deep.

The tool should move down slowly to just above or into the workpiece, here -1.0 is a safe approach depth.

3fill in blank

hard

Fix the error in the retract move to safely lift the tool after cutting.

CNC Programming

G00 Z[1] ; Retract tool

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

A-5.0

B5.0

C0.0

D-1.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative Z values which move the tool down instead of up.

Using zero which may not clear the workpiece.

Retracting the tool to a positive Z height (e.g., 5.0) lifts it safely above the workpiece.

4fill in blank

hard

Fill both blanks to approach the workpiece horizontally then vertically.

CNC Programming

G00 X[1] Y[2] ; Move above start point

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

A10.0

B0.0

C5.0

D-5.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using zero or negative coordinates that may cause collisions.

Mixing up X and Y values.

The tool moves horizontally to X=10.0 and Y=5.0 above the workpiece before descending.

5fill in blank

hard

Fill all three blanks to create a retract move that lifts and moves the tool away safely.

CNC Programming

G01 Z[1] F100 ; Lift tool
G00 X[2] Y[3] ; Move away

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

A5.0

B0.0

C20.0

D-5.0

Attempts:

3 left

💡 Hint

Common Mistakes

Moving horizontally before lifting the tool.

Using zero or negative coordinates that risk collision.

First lift the tool to Z=5.0, then move it away to X=20.0 and Y=20.0 to clear the work area.