Sketching lecture

00:00

Sketching.

00:02

After completing this lecture,

00:03

you'll be able to

00:05

understand sketches in fusion,

00:06

identify sketch elements,

00:08

and identify sketch display option.

00:10

What are sketches and where are they used?

00:13

Sketches are the foundation from which you create things like solids,

00:16

surfaces,

00:17

and even T spline bodies.

00:19

Sketches are parametrically defined by things like dimensions and constraints,

00:23

but can also contain references to other geometry,

00:26

things like a selected point,

00:28

edge,

00:28

or a face.

00:30

Sketches can also be in 2D or 3D and used to build geometry,

00:34

trim or split geometry,

00:36

and even used to contain things like CNC tool paths.

00:40

Sketch element identification.

00:42

When we're creating sketches in Fusion 360,

00:44

the display of those sketch entities will help us identify

00:48

whether or not they need a dimension or constraint,

00:50

whether or not they're construction.

00:52

Keep in mind that there are a couple of other ways that we

00:55

can see sketch entities displayed if they're

00:57

projected from another sketch and construction,

00:60

for example,

01:01

but we're gonna cover the most common ways that we'll see sketch entities.

01:04

First is fully defined.

01:06

A fully defined sketch entity will be displayed as black.

01:09

This means that it is fixed in space

01:11

and it's fully defined with dimensions and constraints.

01:15

An underdefined sketch entity will be displayed in blue.

01:19

Sketch dimensions will be displayed next to the entity that they're referencing.

01:23

Now,

01:23

in most cases,

01:24

you'll see these as a few different types.

01:26

We'll have diameter and radius dimensions for things like circles and arcs,

01:30

and we'll have linear or aligned dimensions for things like rectangular edges.

01:35

Sketch constraints will help us define the relationship

01:38

of that sketch entity to other geometry.

01:40

In this case,

01:41

we're looking at a horizontal vertical constraint.

01:44

This tells us that this line is horizontal,

01:46

and even though it's displayed in black,

01:48

its end points are not fully defined because

01:50

of the large circle that it's referencing.

01:53

And last,

01:54

we have construction.

01:55

Any sketch entity can be converted to or from construction.

01:59

This will change not only its display,

02:01

but also its color.

02:02

If it's an underdefined line,

02:04

it'll be displayed as a dashed orange line.

02:06

If it's a fully defined construction line,

02:08

it'll be displayed as dashed in black.

02:12

Where can you create a 2D sketch?

02:14

The most common place to get started in a design

02:16

infusion 360 is by using one of the default planes.

02:20

These are inside of every new untitled document inside of the origin folder.

02:25

Next,

02:25

we can use those default planes,

02:27

axes,

02:27

and other entities to create a construction plane.

02:30

The construction planes can be used to create a new 2D sketch.

02:35

And the last place that you'll be using to create

02:36

a new sketch is going to be a planer face.

02:39

The planar face can belong to a solid or a surface body,

02:42

and as long as it's plainer,

02:44

it can be used to start a new sketch.

02:46

Keep in mind that by default,

02:48

using a planar face will also project its external geometry.

02:52

This means that you'll already have a close profile inside of your 2D sketch.

02:57

What are some common sketch entities?

02:60

We're not gonna cover every sketch entity,

03:01

but some of the most common ones that you'll be using are things like lines,

03:05

rectangles,

03:06

circles,

03:07

arcs,

03:08

polygons,

03:09

slots,

03:11

splits,

03:11

and text.

03:13

Notice that with each of these,

03:15

some of them have default constraints that are applied.

03:18

For example,

03:19

when you apply a line that is horizontal,

03:21

it'll have that horizontal constraint applied.

03:24

Things like rectangles have a couple of options.

03:27

A center point rectangle will allow you to create

03:29

a rectangle that has two construction lines inside of it

03:32

and reference a center point.

03:34

You also note that things like slots already have a construction line at the center.

03:40

Not every sketch entity will automatically populate

03:43

a constraint or include construction geometry,

03:46

but some of them do,

03:47

and as you get more comfortable creating sketches,

03:49

you'll become more comfortable in deciding which of these sketch

03:52

entities you want to use to start your sketch.

03:55

How are sketches defined?

03:57

There are two main ways in which we'll define a sketch dimensions and constraints.

04:02

Dimensions provide a numerical input for the

04:04

length and location of a sketch entity.

04:07

Constraints define the relationship of a sketch entity relative

04:10

to other geometry or the construction planes in origin.

04:14

As you begin creating sketches,

04:15

you'll need to think about your design intent.

04:18

Design intent is looking at how things in your design are gonna update downstream.

04:23

You'll need to think about whether or not dimensions or constraints or a

04:26

combination of both of those is going to be the best option.

04:30

What display options are available?

04:33

Any time you start a new sketch,

04:35

the sketch palette will be displayed on the right hand side.

04:38

This will contain options for the specific

04:40

sketch entity that you're currently using.

04:43

For example,

04:43

in our sketch palette,

04:44

we see that we have some rectangle options.

04:47

This is a corner point rectangle,

04:49

a center point rectangle,

04:50

and a 3 point,

04:51

which allows us to create a rectangle at some specified angle.

04:55

And during that sketch,

04:56

the palette provides other options for features or sketch visualization,

04:60

things like toggling a sketch between construction entities,

05:03

looking at to view a sketch plane from a normal direction,

05:07

toggling on and off grid and display options,

05:09

and even creating a 3D sketch.

05:12

What is 3D sketching?

05:15

Creating a sketch in 3D allows the users to

05:17

generate complex curves for use with surface creation,

05:20

sweet paths,

05:21

or even general geometry creation.

05:26

but not all features.

05:28

For example,

05:28

a closed profile is required to create a solid extrude,

05:32

and a 2D closed profile is required to create a loft.

05:38

but it's something that is available in Fusion 360

05:41

as a toggle option inside of the sketch palette.

05:45

So in conclusion,

05:47

sketches are used to define nearly all geometry created in CAT.

05:51

Sketch definitions should be meaningful with dimensions and constraints

05:54

to aid in feature creation and geometry updates.

05:58

Sketches can be updated and edited at any point in time,

06:02

and features created from a sketch or sketches will maintain a link.

06:06

Sketches are a part of the 3D modeling process and something that

06:09

you should spend the time and make sure that you're comfortable with,

06:12

as it will greatly impact the rest of your 3D designs.

Video transcript

00:00

Sketching.

00:02

After completing this lecture,

00:03

you'll be able to

00:05

understand sketches in fusion,

00:06

identify sketch elements,

00:08

and identify sketch display option.

00:10

What are sketches and where are they used?

00:13

Sketches are the foundation from which you create things like solids,

00:16

surfaces,

00:17

and even T spline bodies.

00:19

Sketches are parametrically defined by things like dimensions and constraints,

00:23

but can also contain references to other geometry,

00:26

things like a selected point,

00:28

edge,

00:28

or a face.

00:30

Sketches can also be in 2D or 3D and used to build geometry,

00:34

trim or split geometry,

00:36

and even used to contain things like CNC tool paths.

00:40

Sketch element identification.

00:42

When we're creating sketches in Fusion 360,

00:44

the display of those sketch entities will help us identify

00:48

whether or not they need a dimension or constraint,

00:50

whether or not they're construction.

00:52

Keep in mind that there are a couple of other ways that we

00:55

can see sketch entities displayed if they're

00:57

projected from another sketch and construction,

00:60

for example,

01:01

but we're gonna cover the most common ways that we'll see sketch entities.

01:04

First is fully defined.

01:06

A fully defined sketch entity will be displayed as black.

01:09

This means that it is fixed in space

01:11

and it's fully defined with dimensions and constraints.

01:15

An underdefined sketch entity will be displayed in blue.

01:19

Sketch dimensions will be displayed next to the entity that they're referencing.

01:23

Now,

01:23

in most cases,

01:24

you'll see these as a few different types.

01:26

We'll have diameter and radius dimensions for things like circles and arcs,

01:30

and we'll have linear or aligned dimensions for things like rectangular edges.

01:35

Sketch constraints will help us define the relationship

01:38

of that sketch entity to other geometry.

01:40

In this case,

01:41

we're looking at a horizontal vertical constraint.

01:44

This tells us that this line is horizontal,

01:46

and even though it's displayed in black,

01:48

its end points are not fully defined because

01:50

of the large circle that it's referencing.

01:53

And last,

01:54

we have construction.

01:55

Any sketch entity can be converted to or from construction.

01:59

This will change not only its display,

02:01

but also its color.

02:02

If it's an underdefined line,

02:04

it'll be displayed as a dashed orange line.

02:06

If it's a fully defined construction line,

02:08

it'll be displayed as dashed in black.

02:12

Where can you create a 2D sketch?

02:14

The most common place to get started in a design

02:16

infusion 360 is by using one of the default planes.

02:20

These are inside of every new untitled document inside of the origin folder.

02:25

Next,

02:25

we can use those default planes,

02:27

axes,

02:27

and other entities to create a construction plane.

02:30

The construction planes can be used to create a new 2D sketch.

02:35

And the last place that you'll be using to create

02:36

a new sketch is going to be a planer face.

02:39

The planar face can belong to a solid or a surface body,

02:42

and as long as it's plainer,

02:44

it can be used to start a new sketch.

02:46

Keep in mind that by default,

02:48

using a planar face will also project its external geometry.

02:52

This means that you'll already have a close profile inside of your 2D sketch.

02:57

What are some common sketch entities?

02:60

We're not gonna cover every sketch entity,

03:01

but some of the most common ones that you'll be using are things like lines,

03:05

rectangles,

03:06

circles,

03:07

arcs,

03:08

polygons,

03:09

slots,

03:11

splits,

03:11

and text.

03:13

Notice that with each of these,

03:15

some of them have default constraints that are applied.

03:18

For example,

03:19

when you apply a line that is horizontal,

03:21

it'll have that horizontal constraint applied.

03:24

Things like rectangles have a couple of options.

03:27

A center point rectangle will allow you to create

03:29

a rectangle that has two construction lines inside of it

03:32

and reference a center point.

03:34

You also note that things like slots already have a construction line at the center.

03:40

Not every sketch entity will automatically populate

03:43

a constraint or include construction geometry,

03:46

but some of them do,

03:47

and as you get more comfortable creating sketches,

03:49

you'll become more comfortable in deciding which of these sketch

03:52

entities you want to use to start your sketch.

03:55

How are sketches defined?

03:57

There are two main ways in which we'll define a sketch dimensions and constraints.

04:02

Dimensions provide a numerical input for the

04:04

length and location of a sketch entity.

04:07

Constraints define the relationship of a sketch entity relative

04:10

to other geometry or the construction planes in origin.

04:14

As you begin creating sketches,

04:15

you'll need to think about your design intent.

04:18

Design intent is looking at how things in your design are gonna update downstream.

04:23

You'll need to think about whether or not dimensions or constraints or a

04:26

combination of both of those is going to be the best option.

04:30

What display options are available?

04:33

Any time you start a new sketch,

04:35

the sketch palette will be displayed on the right hand side.

04:38

This will contain options for the specific

04:40

sketch entity that you're currently using.

04:43

For example,

04:43

in our sketch palette,

04:44

we see that we have some rectangle options.

04:47

This is a corner point rectangle,

04:49

a center point rectangle,

04:50

and a 3 point,

04:51

which allows us to create a rectangle at some specified angle.

04:55

And during that sketch,

04:56

the palette provides other options for features or sketch visualization,

04:60

things like toggling a sketch between construction entities,

05:03

looking at to view a sketch plane from a normal direction,

05:07

toggling on and off grid and display options,

05:09

and even creating a 3D sketch.

05:12

What is 3D sketching?

05:15

Creating a sketch in 3D allows the users to

05:17

generate complex curves for use with surface creation,

05:20

sweet paths,

05:21

or even general geometry creation.

05:26

but not all features.

05:28

For example,

05:28

a closed profile is required to create a solid extrude,

05:32

and a 2D closed profile is required to create a loft.

05:38

but it's something that is available in Fusion 360

05:41

as a toggle option inside of the sketch palette.

05:45

So in conclusion,

05:47

sketches are used to define nearly all geometry created in CAT.

05:51

Sketch definitions should be meaningful with dimensions and constraints

05:54

to aid in feature creation and geometry updates.

05:58

Sketches can be updated and edited at any point in time,

06:02

and features created from a sketch or sketches will maintain a link.

06:06

Sketches are a part of the 3D modeling process and something that

06:09

you should spend the time and make sure that you're comfortable with,

06:12

as it will greatly impact the rest of your 3D designs.

After completing this video, you’ll be able to:

  • Understand sketches in Fusion.
  • Identify sketch elements.
  • Identify sketch display options.

Lecture

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