• Fusion

Fusion sketch fundamentals

Understand the benefits of using Fusion.


00:03

A sketch is a geometric profile that forms the foundation

00:07

of 3D geometry in a design in fusion 360.

00:13

Before you can create 3d objects in your design,

00:17

you first need to create the underlying sketch profiles

00:20

that drive the overall shapes of the parametric solid

00:23

surface or tin

00:25

bodies that make up your design.

00:29

A sketch is the backbone of any subsequent parametric modeling.

00:33

If you create a robust sketch profile,

00:36

you can improve your workflow

00:37

and minimize potential downstream issues in your design.

00:42

An open profile is a series of connected two

00:45

D geometry that does not form a closed boundary.

00:49

You can use open profiles to create surface bodies

00:52

to extrude thin solid features

00:55

or to guide some modeling operations like loft.

00:59

A closed profile is a series of connected two

01:02

D geometry that does form a closed boundary.

01:06

A sketch profile is shaded blue when it is closed

01:09

and can be used to extrude 3d shapes

01:11

or perform 3d boolean commands. For example,

01:16

an unconstrained sketch contains some geometry that is not locked down by

01:20

constraints and dimensions and is still free to move in space.

01:26

Unconstrained sketches are useful early on in the

01:28

design process when you're still exploring form,

01:32

experimenting

01:33

and want more flexibility before you commit to your design intent.

01:37

And you can lock things down gradually as you evolve the design.

01:42

Be aware though

01:43

that if you reference unconstrained sketch, jumpy

01:46

and downstream designs,

01:47

it can cause unpredictable results in complex parametric assemblies.

01:53

A constraint sketch contains geometry that is

01:56

locked down in place by constraints and dimensions

01:59

and cannot move when clicking and dragging with your mouse.

02:04

Constrained sketches are useful when you know

02:06

the precise dimensions and details of a design

02:09

such that you are certain about your design intent,

02:13

their behavior in complex parametric designs is more predictable.

02:17

Although be aware that constrained sketches can lock down features in your design

02:22

more robustly than you might want early on in their design process.

02:27

So be cautious when adding too many details and

02:29

constraints into a single sketch at this stage.

02:34

Sketch geometry is the default line type used to create two

02:38

D features in a sketch that contribute to the sketch profile

02:42

and display as a solid blue line. When unconstrained

02:48

construction geometry is a line type used as

02:51

a reference for sketch geometry constraints and dimensions.

02:55

And it does not contribute to the sketch profile.

02:59

Construction geometry displays as a dashed orange line. When unconstrained

03:06

centerline geometry is a line type used

03:09

to revolve sketch profiles or define symmetry

03:12

and it contributes to the sketch profile.

03:16

Centerline geometry displays as a dashed orange center line when unconstrained

03:23

projected geometry is an associative reference to profiles of two D or

03:32

and displayed as purple lines and points.

03:36

If you update the reference geometry,

03:39

the projected geometry updates to reflect the change.

03:44

Fixed geometry is any sketch construction

03:48

or centerline geometry that you have locked in place and displays as green.

03:54

If you need to edit or move fixed geometry, you first need to unfix it.

03:59

Now, you have a bit more of an understanding on sketch profiles,

04:02

constrained versus unconstrained sketches

04:05

as well as geometry types.

Video transcript

00:03

A sketch is a geometric profile that forms the foundation

00:07

of 3D geometry in a design in fusion 360.

00:13

Before you can create 3d objects in your design,

00:17

you first need to create the underlying sketch profiles

00:20

that drive the overall shapes of the parametric solid

00:23

surface or tin

00:25

bodies that make up your design.

00:29

A sketch is the backbone of any subsequent parametric modeling.

00:33

If you create a robust sketch profile,

00:36

you can improve your workflow

00:37

and minimize potential downstream issues in your design.

00:42

An open profile is a series of connected two

00:45

D geometry that does not form a closed boundary.

00:49

You can use open profiles to create surface bodies

00:52

to extrude thin solid features

00:55

or to guide some modeling operations like loft.

00:59

A closed profile is a series of connected two

01:02

D geometry that does form a closed boundary.

01:06

A sketch profile is shaded blue when it is closed

01:09

and can be used to extrude 3d shapes

01:11

or perform 3d boolean commands. For example,

01:16

an unconstrained sketch contains some geometry that is not locked down by

01:20

constraints and dimensions and is still free to move in space.

01:26

Unconstrained sketches are useful early on in the

01:28

design process when you're still exploring form,

01:32

experimenting

01:33

and want more flexibility before you commit to your design intent.

01:37

And you can lock things down gradually as you evolve the design.

01:42

Be aware though

01:43

that if you reference unconstrained sketch, jumpy

01:46

and downstream designs,

01:47

it can cause unpredictable results in complex parametric assemblies.

01:53

A constraint sketch contains geometry that is

01:56

locked down in place by constraints and dimensions

01:59

and cannot move when clicking and dragging with your mouse.

02:04

Constrained sketches are useful when you know

02:06

the precise dimensions and details of a design

02:09

such that you are certain about your design intent,

02:13

their behavior in complex parametric designs is more predictable.

02:17

Although be aware that constrained sketches can lock down features in your design

02:22

more robustly than you might want early on in their design process.

02:27

So be cautious when adding too many details and

02:29

constraints into a single sketch at this stage.

02:34

Sketch geometry is the default line type used to create two

02:38

D features in a sketch that contribute to the sketch profile

02:42

and display as a solid blue line. When unconstrained

02:48

construction geometry is a line type used as

02:51

a reference for sketch geometry constraints and dimensions.

02:55

And it does not contribute to the sketch profile.

02:59

Construction geometry displays as a dashed orange line. When unconstrained

03:06

centerline geometry is a line type used

03:09

to revolve sketch profiles or define symmetry

03:12

and it contributes to the sketch profile.

03:16

Centerline geometry displays as a dashed orange center line when unconstrained

03:23

projected geometry is an associative reference to profiles of two D or

03:32

and displayed as purple lines and points.

03:36

If you update the reference geometry,

03:39

the projected geometry updates to reflect the change.

03:44

Fixed geometry is any sketch construction

03:48

or centerline geometry that you have locked in place and displays as green.

03:54

If you need to edit or move fixed geometry, you first need to unfix it.

03:59

Now, you have a bit more of an understanding on sketch profiles,

04:02

constrained versus unconstrained sketches

04:05

as well as geometry types.

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