First layer settings for adhesion in 3D Printing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the first layer height for better adhesion.

3D Printing

first_layer_height = [1]

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

A0.3

B0.1

C0.5

D1.0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the first layer height too high reduces adhesion.

Using the same height as other layers can cause poor bed contact.

The first layer height is usually set lower, around 0.1 mm, to improve adhesion by allowing the filament to stick better to the print bed.

2fill in blank

medium

Complete the code to set the first layer print speed for better adhesion.

3D Printing

first_layer_speed = [1]

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

A20

B100

C80

D60

Attempts:

3 left

💡 Hint

Common Mistakes

Printing the first layer too fast causes poor adhesion.

Using default or high speeds can lead to warping.

Slowing down the first layer speed to around 20 mm/s helps the filament stick well to the bed by allowing better placement.

3fill in blank

hard

Fix the error in the code to set the first layer extrusion width for better adhesion.

3D Printing

first_layer_extrusion_width = [1]

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

A200%

B100%

C50%

D10%

Attempts:

3 left

💡 Hint

Common Mistakes

Using too low extrusion width causes gaps and poor adhesion.

Setting extrusion width equal to nozzle diameter may not be enough.

Setting the first layer extrusion width to 200% increases the amount of filament extruded, improving bed adhesion by creating a wider line.

4fill in blank

hard

Fill both blanks to set the first layer temperature and bed temperature for better adhesion.

3D Printing

first_layer_temperature = [1]
bed_temperature = [2]

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

A60

B50

C110

D70

Attempts:

3 left

💡 Hint

Common Mistakes

Setting temperatures too low causes poor adhesion.

Using the same temperature as other layers may not be effective.

The first layer temperature is often set higher, around 70°C for the nozzle, and the bed temperature around 110°C to help the filament stick well.

5fill in blank

hard

Fill all three blanks to set the first layer fan speed, skirt line count, and initial layer flow rate for better adhesion.

3D Printing

first_layer_fan_speed = [1]
skirt_line_count = [2]
initial_layer_flow_rate = [3]

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

A0%

B3

C110%

D100%

Attempts:

3 left

💡 Hint

Common Mistakes

Using fan speed too high cools the filament too fast.

Not using skirt lines can cause poor extrusion start.

Setting flow rate too low causes weak first layer.

Turning off the fan (0%) on the first layer prevents cooling too fast, using 3 skirt lines helps prime the nozzle, and increasing flow rate to 110% ensures good filament extrusion for adhesion.

Practice

1. What is the main purpose of adjusting the first layer settings in 3D printing?

easy

A. To speed up the entire printing process

B. To reduce the noise of the printer

C. To change the color of the filament

D. To ensure the print sticks well to the build plate

Solution

1. Step 1: Understand the role of the first layer

   The first layer is the foundation of the print and must stick well to avoid print failure.

2. Step 2: Identify the main goal of first layer settings

   Adjusting height, speed, and temperature helps the filament stick properly to the build plate.

3. Final Answer:

   To ensure the print sticks well to the build plate -> Option D

4. Quick Check:

   First layer adhesion = sticking well [OK]

Hint: First layer settings fix sticking issues quickly [OK]

Common Mistakes:

• Thinking first layer controls print speed
• Confusing adhesion with filament color
• Assuming it reduces printer noise

2. Which of the following is a correct first layer speed setting to improve adhesion?

easy

A. 10 mm/s

B. 500 mm/s

C. 100 mm/s

D. 0.1 mm/s

Solution

1. Step 1: Recall typical first layer speed values

   First layer speed is usually slower to allow better filament placement and adhesion.

2. Step 2: Compare options to typical values

   10 mm/s is a common slow speed for first layers; 100 mm/s and 500 mm/s are too fast, 0.1 mm/s is too slow and impractical.

3. Final Answer:

   10 mm/s -> Option A

4. Quick Check:

   Slow first layer speed = 10 mm/s [OK]

Hint: First layer speed should be slow, around 10 mm/s [OK]

Common Mistakes:

• Choosing very high speeds that cause poor adhesion
• Picking extremely low speeds that waste time
• Confusing speed units

3. Given these first layer settings: height = 0.3 mm, speed = 15 mm/s, temperature = 210°C, which adhesion type is best for a small, detailed print?

medium

A. Brim

B. Skirt

C. Raft

D. No adhesion

Solution

1. Step 1: Understand adhesion types and their uses

   Skirt surrounds the print but doesn't touch; brim adds extra lines touching the print edge; raft creates a base under the print.

2. Step 2: Match adhesion type to small, detailed prints

   Brim helps small prints stick better by increasing surface area without using a raft, which wastes material.

3. Final Answer:

   Brim -> Option A

4. Quick Check:

   Small detailed print = Brim adhesion [OK]

Hint: Use brim for small detailed prints to improve sticking [OK]

Common Mistakes:

• Choosing raft which wastes material unnecessarily
• Picking skirt which may not improve adhesion enough
• Selecting no adhesion causing print failure

4. A user sets the first layer height too high and notices poor adhesion. What is the likely cause?

medium

A. The nozzle is too close to the bed

B. The filament is not hot enough

C. The first layer is not squished enough onto the bed

D. The print speed is too slow

Solution

1. Step 1: Understand effect of first layer height

   If the first layer height is too high, the filament won't be pressed enough onto the bed, reducing adhesion.

2. Step 2: Identify the cause of poor adhesion

   Not squishing the filament means it doesn't stick well; nozzle too close or filament temperature issues cause different problems.

3. Final Answer:

   The first layer is not squished enough onto the bed -> Option C

4. Quick Check:

   High first layer height = poor squish = poor adhesion [OK]

Hint: Too high first layer = filament not pressed down enough [OK]

Common Mistakes:

• Thinking nozzle is too close when it's actually too far
• Blaming print speed instead of layer height
• Assuming filament temperature is always the cause

5. You want to print a large flat object that warps at the edges. Which first layer adhesion setting combination is best to reduce warping?

hard

A. Use raft adhesion with first layer height 0.2 mm and temperature 60°C

B. Use brim adhesion with first layer height 0.3 mm and temperature 110°C

C. Use skirt adhesion with first layer height 0.4 mm and temperature 50°C

D. Use no adhesion with first layer height 0.1 mm and temperature 70°C

Solution

1. Step 1: Identify adhesion type to reduce warping on large flat prints

   Brim adhesion adds extra lines around the print edges to hold them down and reduce warping better than skirt or no adhesion.

2. Step 2: Choose suitable first layer height and temperature

   A slightly thicker first layer (0.3 mm) helps good bed contact; higher temperature (110°C) improves filament flow and sticking, especially for materials like ABS.

3. Final Answer:

   Use brim adhesion with first layer height 0.3 mm and temperature 110°C -> Option B

4. Quick Check:

   Large flat print warping = brim + proper height + high temp [OK]

Hint: Brim and higher temp help large flat prints stick and avoid warping [OK]

Common Mistakes:

• Choosing raft which wastes material and time
• Using skirt which doesn't prevent edge warping
• Ignoring temperature effects on adhesion