Vise setup for milling in CNC Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the vise jaw opening to 50 mm.

CNC Programming

G54 ; Select work coordinate system
M06 T01 ; Tool change to tool 1
S1200 M03 ; Spindle on clockwise at 1200 RPM
G00 X0 Y0 Z50 ; Rapid move to safe height
M08 ; Coolant on
G01 Z[1] F100 ; Move down to clamp height

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

A-5

B-50

C-20

D-10

Attempts:

3 left

💡 Hint

Common Mistakes

Using a positive value which moves the tool up instead of down.

Setting too large a negative value causing collision.

The vise jaw opening height is set by moving the tool down to -5 mm at a controlled feed rate.

2fill in blank

medium

Complete the code to activate the vise clamp after positioning.

CNC Programming

G00 X0 Y0 Z10 ; Move to safe position
M[1] ; Activate vise clamp
G04 P1 ; Dwell for 1 second to ensure clamp

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

A07

B08

C06

D09

Attempts:

3 left

💡 Hint

Common Mistakes

Using M08 which turns coolant on instead of clamping.

Using M06 which is tool change.

M09 is commonly used to activate the vise clamp in CNC programs.

3fill in blank

hard

Fix the error in the code to correctly set the vise jaw position to 30 mm.

CNC Programming

G01 X[1] F200 ; Move vise jaw to position

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

A30

B-30

C300

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative values which move the jaw in the wrong direction.

Using values too large for the machine limits.

The vise jaw position should be set to 30 mm, a positive value for correct positioning.

4fill in blank

hard

Fill both blanks to set the vise jaw speed and position correctly.

CNC Programming

G01 X[1] F[2] ; Move vise jaw

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

A25

B150

C100

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Setting feed rate too high causing unsafe movement.

Setting position too large causing mechanical issues.

The jaw position is 25 mm and the feed rate is 100 mm/min for safe movement.

5fill in blank

hard

Fill all three blanks to complete the vise setup sequence.

CNC Programming

G54 ; Select work coordinate system
G00 X[1] Y[2] Z[3] ; Move to safe position

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

A0

C50

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Setting Z too low causing collision.

Setting X or Y to non-zero causing misalignment.

Moving to X=0, Y=0, Z=50 mm is a safe position before starting milling.

Practice

1. What is the main purpose of setting up a vise correctly before milling?

easy

A. To make the machine louder

B. To speed up the milling process

C. To keep the workpiece steady for accurate milling

D. To cool down the cutting tool

Solution

1. Step 1: Understand the role of the vise

   The vise holds the workpiece firmly so it does not move during milling.

2. Step 2: Connect vise stability to milling accuracy

   If the workpiece moves, the milling will be inaccurate. A steady hold ensures precision.

3. Final Answer:

   To keep the workpiece steady for accurate milling -> Option C

4. Quick Check:

   Vise stability = Accurate milling [OK]

Hint: Remember: steady hold means precise cuts [OK]

Common Mistakes:

• Thinking vise speeds up milling
• Believing vise cools the tool
• Assuming vise makes noise

2. Which of the following is the correct step to prepare the vise before milling?

easy

A. Clean and align the vise jaws before tightening

B. Tighten the vise without cleaning the jaws

C. Place the workpiece loosely in the vise

D. Set the machine zero before placing the workpiece

Solution

1. Step 1: Identify proper vise preparation

   Cleaning and aligning the vise jaws ensures the workpiece sits flat and secure.

2. Step 2: Understand why tightening after cleaning is important

   Tightening after cleaning prevents slipping and misalignment during milling.

3. Final Answer:

   Clean and align the vise jaws before tightening -> Option A

4. Quick Check:

   Clean + align before tighten = Secure hold [OK]

Hint: Always clean and align jaws before tightening [OK]

Common Mistakes:

• Skipping cleaning step
• Tightening before alignment
• Loose workpiece placement

3. Given this CNC setup code snippet for vise positioning:

G54
G0 X0 Y0 Z0
G43 H01 Z50
G1 Z-5 F100

What does the command G54 do in this context?

medium

A. Moves the tool to the home position

B. Starts the spindle rotation

C. Sets the tool length offset

D. Selects the first work coordinate system (machine zero)

Solution

1. Step 1: Understand G54 command

   G54 selects the first work coordinate system, setting the origin for the workpiece.

2. Step 2: Differentiate from other commands

   G43 sets tool length offset, spindle start is M03 (not shown), and G0 moves tool rapidly.

3. Final Answer:

   Selects the first work coordinate system (machine zero) -> Option D

4. Quick Check:

   G54 = Work coordinate system select [OK]

Hint: G54 always sets work coordinate zero [OK]

Common Mistakes:

• Confusing G54 with spindle start
• Mixing G54 and tool offset
• Assuming G54 moves tool

4. Identify the error in this vise setup code snippet:

G54
G0 X10 Y10 Z5
G43 H01 Z-10
G1 Z-5 F100

What is wrong with the G43 H01 Z-10 line?

medium

A. Feed rate is missing in this line

B. Z value should not be negative with G43 tool length offset

C. G43 cannot be used with G54

D. H01 is an invalid tool length offset number

Solution

1. Step 1: Understand G43 usage

   G43 applies tool length offset and moves tool to a safe height, Z should be positive.

2. Step 2: Analyze Z-10 with G43

   Negative Z means tool moves below the part, which is unsafe at this stage.

3. Final Answer:

   Z value should not be negative with G43 tool length offset -> Option B

4. Quick Check:

   G43 Z must be positive for safe tool length offset [OK]

Hint: G43 Z must be positive to avoid crashes [OK]

Common Mistakes:

• Using negative Z with G43
• Wrong tool offset number
• Confusing G43 with coordinate system

5. You want to set the machine zero at the top-left corner of the workpiece held in the vise. Which sequence correctly sets this zero after clamping the workpiece?

hard

A. Tighten the vise jaws, move the tool to the corner, then set zero with G54

B. Move the tool to the corner, set zero with G92, then tighten the vise jaws

C. Set zero with G54 first, then place and tighten the workpiece in the vise

D. Tighten the vise jaws, set zero with G92, then move the tool to the corner

Solution

1. Step 1: Secure the workpiece first

   Tightening the vise jaws before setting zero ensures the workpiece won't move after zero is set.

2. Step 2: Move tool to the desired zero point and set zero

   Moving the tool to the top-left corner and setting zero with G54 defines the work coordinate system correctly.

3. Final Answer:

   Tighten the vise jaws, move the tool to the corner, then set zero with G54 -> Option A

4. Quick Check:

   Clamp first, then zero at workpiece corner [OK]

Hint: Clamp workpiece before setting zero [OK]

Common Mistakes:

• Setting zero before clamping
• Using G92 incorrectly
• Moving tool after zeroing