Additive: 3D printing
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Flip to reveal answersHow do LOM, FDM and SLA differ?
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All 4 Flashcards — Additive: 3D printing
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Question
How do LOM, FDM and SLA differ?
Answer
Only in how each layer is made. LOM glues down sheets and cuts each outline, FDM extrudes melted thermoplastic, and SLA cures liquid photopolymer with light.
Question
Why is a printed part weaker in one direction?
Answer
The bond between layers is weaker than the material within a layer, so the part breaks along a layer. Build orientation decides which direction it can be loaded in.
Question
Why does an overhang need support material?
Answer
Nothing holds up material printed over air, so overhangs steeper than about 45° need support printed beneath and removed afterwards — costing material, time and clean-up.
Question
What can additive manufacturing make that no other category can?
Answer
Internal channels, lattices and shapes that would need a mould split into many pieces, because no tool ever has to be withdrawn from inside the part.
Read the notes
Full study notes for Additive: 3D printing
Topic 4.1 hub
Manufacturing techniques
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Design Technology exam skills
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