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Maker Vocabulary > 3d Printing > Flashcards

3d Printing Flashcards

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1
Q

What format do you export from a CAD software program for 3d printing?

A

STL stands for either: stereo lithograph or Standard Tessellation Language.

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2
Q

What does an STL file contain?

A

Mesh data with all of the faces that form the design.

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3
Q

What is CAM software?

A

Computer Aided Manufacturing software converts geometric data into instructions for computer-controlled machines. Aka ‘slicer’

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4
Q

How is resolution measured on a 3d printer?

A

By layer height which is variable within and between prints. We use microns or millimeters as units.

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5
Q

What does ABS stand for

A

Acrylonitrile butadiene styrene

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6
Q

What does PLA stand for?

A

Polylactic acid

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7
Q

What is the shallowest angle most 3d printers can create without supports?

A

45 degrees

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8
Q

What is FDM printing?

A

Fused deposition modeling. Also sometimes called FFF Fused filament fabrication. Works like an accurate computer-controlled glue gun.

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9
Q

Isotropic

A

Same strength in different directions.

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10
Q

What file types can be used with full color 3d printers?

A

X3d, VRML or WRL, OBJ with texture map, or DAE

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11
Q

Bounding Box

A

Maximum size you can print. Also called build envelope.

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12
Q

Clearance

A

Minimum distance between two elements so they can be successfully printed.

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13
Q

Direct Modeling

A

Add and modify geometry freely

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14
Q

Parametric Modeling

A

Define relationships between objects, uses variables and constraints.

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15
Q

What are the three boolean operators for solid design?

A

Union (or), Subtraction (not) and Intersection (and)

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16
Q

What is solid modeling?

A

Use of whole, ‘water tight’ 3d objects to create a design.

17
Q

What is surface and mesh modeling?

A
18
Q

Why use solid modeling?

A

Good for work that starts with 2d sketechs and 3d primitives.

Good for beginners

Always watertight

19
Q

Why use surface and mesh workflows?

A

Better suited for complex shapes

20
Q

What is Photogrammetry?

A

A 3d scanning process that uses traditional photography, moving slowly in a circle around the object at both a low and high angle. Software uses triangulation to create a 3d mesh and UV map for color.

21
Q

What is Laser Triangulation?

A

A 3d scanning process that uses a rectilinear laser beam and a camera to analyze deformation of the light. Software triangulates and extrapolates a 3d mesh. Usually a fixed unit with turntable or gantry, no color data.

22
Q

What is a structured light scanner?

A

A type of 3d scanner with a combination of one or more cameras and projected light (stripes or dots). Software interpreters the geometry of the object. Can be handheld or tripod mounted and may be mesh only or mesh and color.

23
Q

What are the three main types of 3d scanners?

A

Photogrammetry, Laser Triangulation, Structured Light

24
Q

What is a good generic layer height for an average print?

A

0.15mm

25
Q

What is G-code?

A

Output of a slicer, the instructions for the 3d printer to create your design.

26
Q

What is a brim?

A

A layer along the outside of the model that doesn’t go under.

27
Q

What is a raft?

A

A series of layers built underneath a model you are printing. It is intended to improve adhesion and prevent warping. It is mad of a layer of thicker plastic printed slowly followed by several layers of mesh like spines of a hairbrush that detach from the print.

28
Q

When should you use a raft?

A

If you have adhesion problems, or your model would have few points of contact with the bed

29
Q

What is a brim used for?

A

Protect against warping and improves adhesion. Takes less material and cleanup than a boat. Helps your model have a smooth bottom layer.

30
Q

What is a skirt?

A

A ring of printed materials set far enough away from the model that they don’t touch.

31
Q

Why use a skirt?

A

A skirt primes the extruder and allows any delay or fits and starts to happen before your model is printed.

32
Q

What does ‘Ironing’ 3d prints mean and what is it used for?

A

3d printer moves the nozzle back and forth over the top layer. Good for smoothing out the surface to be flat.

33
Q

What data does an OBJ file store?

A

Geometry, texture, color, and material data

34
Q

What does NURBS stand for?

A

Non-uniform Rational B-Spline

35
Q

What does NURBS modeling use to create a 3D model?

A

Mathematical representations of curves and surfaces defined by control points and knots.

36
Q

Perimiter

A

Perimeters are the walls of a 3D printed object, also known as a shell, wall, or perimeter. They are the number of lines used in printing each wall, and the wall thickness is the number of perimeters multiplied by the line width

37
Q

Micron

A

1 micron = 0.0000001 meter
In 3D printing, the unit represents layer height. Also called sprint resolution or z height

The lower the micron the better the resolution.

38
Q

Interlocking Parts

A

Joints that rely on frictional force between two parts to hold the joint.

Types: Box Joint, Dovetail, Tongue and Groove.

39
Q

Snap-Fit joints

A

Formed by snapping or bending the mating parts into a position where they are held in place by interference with interlocking features.

Types: Cantilever Snap Fits, Annular Snap Fits, Torsional snap fits,

Maker Vocabulary (5 decks)

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