When supports are needed in 3D Printing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main reason supports are needed in 3D printing?

Supports are needed to hold up parts of a model that overhang or are not directly connected to the layer below, preventing sagging or collapse during printing.

beginner

What kind of model features usually require supports?

Features like overhangs greater than about 45 degrees, bridges, and complex shapes with gaps or floating parts usually require supports.

intermediate

How do supports affect the post-printing process?

Supports must be removed after printing, which can add time and effort. They may also leave marks on the model where they were attached.

intermediate

Can supports be avoided in 3D printing? If yes, how?

Yes, supports can be avoided by designing models with minimal overhangs, using self-supporting angles, or orienting the model to reduce unsupported areas.

advanced

What materials or printing technologies reduce the need for supports?

Some materials like flexible filaments and technologies like resin printing can reduce or eliminate the need for supports due to different printing methods and material properties.

Which feature most likely requires supports in 3D printing?

A An overhang at 60 degrees

B A flat base layer

C A vertical wall

D A solid cube

Overhangs greater than about 45 degrees usually need supports to prevent sagging.

What happens if you print an unsupported overhang?

A It uses less material

B It prints perfectly

C It prints faster

D It may sag or collapse

Unsupported overhangs can sag or collapse because there is nothing underneath to hold the material.

How can you reduce the need for supports?

A Increase print speed

B Change model orientation

C Use more filament

D Print at higher temperature

Changing the model's orientation can reduce unsupported areas and thus reduce the need for supports.

What is a downside of using supports?

A They make the print lighter

B They reduce print time

C They require removal after printing

D They improve surface finish

Supports must be removed after printing, which adds extra work and can affect the surface finish.

Which printing technology often needs fewer supports?

A Resin-based printing

B Inkjet printing

C Fused filament fabrication (FFF)

D Laser cutting

Resin-based printing can often print complex shapes with fewer supports due to the way the resin cures layer by layer.

Explain why supports are needed in 3D printing and what types of model features require them.

Think about parts of the model that have nothing underneath while printing.

Describe how you can design or prepare a 3D model to minimize the need for supports.

Consider how changing the shape or position of the model affects printing.