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Review the types of joints available in Fusion assemblies.
Type:
Tutorial
Length:
5 min.
Tutorial resources
These downloadable resources will be used to complete this tutorial:
Transcript
00:03
In Fusion, there are several available joint types that can be applied to an assembly.
00:08
Each of these types offers different degrees of freedom and includes specific options to refine joint behavior.
00:15
Open the Vise Fusion archive file.
00:19
Fusion uses joints to remove degrees of freedom from components.
00:24
When you select two components and then move them, they move and rotate together.
00:29
At this point, all degrees of freedom between the two components have been removed.
00:35
However, a joint enables you to specify the relationship between the two components.
00:40
By choosing a different joint type after the selection has been made,
00:44
you can release degrees of freedom to incorporate the type of motion that you need in your assembly.
00:50
In this assembly, there are multiple joints already placed.
00:54
In the Browser, expand the Joints folder, and then click its visibility icon to show the joints in the model.
01:01
Different icons represent different types of joint conditions.
01:06
In this case, you see three different types of joints applied:
01:09
rigid, revolute, and slider.
01:16
Begin placing a joint to understand the process.
01:20
On the Design workspace toolbar, Assemble group, click the Joint tool.
01:26
This opens the Joint dialog, where you can choose the position between each component and the type of joint to apply.
01:33
You do not have to select the type of joint you are placing before you start selecting components.
01:39
The dialog prompts you for the snap point for the first component.
01:43
As you place the pointer over the face of a component, you see multiple icons on that face:
01:49
Point icons indicate endpoints.
01:52
Triangles indicate the midpoint of an edge or arc.
01:56
The square icon shows the centroid of the face.
01:59
Crosses show the center of arcs or circles.
02:03
When you move to other faces, you see the same types of icons.
02:08
As you move to edges, based on the direction that you are coming from, as you near certain points,
02:13
you can get the joint origin to align to different faces at the same point.
02:18
For a simple example, on the floating block, select the midpoint of the bottom of the face.
02:24
In Fusion, once a component is selected, you cannot select it again, so it fades, as you see here.
02:31
Rotate the point of view to find another location on the assembly, and then choose another point on another component.
02:38
Select the midpoint to the bottom of the backstop face as the other component origin.
02:43
From here, you can change the joint type, but in this case, keep the Rigid joint.
02:48
The rigid joint keeps all degrees of freedom locked between each component.
02:54
To view the degrees of freedom offered by the other joint types, switch to the Motion tab and select each Type:
03:03
Revolute releases one rotational degree of freedom as an option.
03:07
As an option, you can choose the axis about which you want the degree of freedom.
03:12
Slider introduces one translational degree of freedom.
03:17
As with Revolute, you can choose which axis you want that degree of freedom to be along.
03:22
Cylindrical has one translational and one rotational degree of freedom.
03:28
Pin Slot also has one translational and one rotational degree of freedom, but the rotation is normal to the direction of the translation.
03:36
Planar offers two translational and one rotational degree of freedom.
03:42
Lastly, Ball offers no translational degrees of freedom, but three rotational degrees of freedom.
03:49
As you begin working on your own designs,
03:52
selecting the correct joint will become more natural, but these are concepts to keep in mind as you continue to work with joints.
Video transcript
00:03
In Fusion, there are several available joint types that can be applied to an assembly.
00:08
Each of these types offers different degrees of freedom and includes specific options to refine joint behavior.
00:15
Open the Vise Fusion archive file.
00:19
Fusion uses joints to remove degrees of freedom from components.
00:24
When you select two components and then move them, they move and rotate together.
00:29
At this point, all degrees of freedom between the two components have been removed.
00:35
However, a joint enables you to specify the relationship between the two components.
00:40
By choosing a different joint type after the selection has been made,
00:44
you can release degrees of freedom to incorporate the type of motion that you need in your assembly.
00:50
In this assembly, there are multiple joints already placed.
00:54
In the Browser, expand the Joints folder, and then click its visibility icon to show the joints in the model.
01:01
Different icons represent different types of joint conditions.
01:06
In this case, you see three different types of joints applied:
01:09
rigid, revolute, and slider.
01:16
Begin placing a joint to understand the process.
01:20
On the Design workspace toolbar, Assemble group, click the Joint tool.
01:26
This opens the Joint dialog, where you can choose the position between each component and the type of joint to apply.
01:33
You do not have to select the type of joint you are placing before you start selecting components.
01:39
The dialog prompts you for the snap point for the first component.
01:43
As you place the pointer over the face of a component, you see multiple icons on that face:
01:49
Point icons indicate endpoints.
01:52
Triangles indicate the midpoint of an edge or arc.
01:56
The square icon shows the centroid of the face.
01:59
Crosses show the center of arcs or circles.
02:03
When you move to other faces, you see the same types of icons.
02:08
As you move to edges, based on the direction that you are coming from, as you near certain points,
02:13
you can get the joint origin to align to different faces at the same point.
02:18
For a simple example, on the floating block, select the midpoint of the bottom of the face.
02:24
In Fusion, once a component is selected, you cannot select it again, so it fades, as you see here.
02:31
Rotate the point of view to find another location on the assembly, and then choose another point on another component.
02:38
Select the midpoint to the bottom of the backstop face as the other component origin.
02:43
From here, you can change the joint type, but in this case, keep the Rigid joint.
02:48
The rigid joint keeps all degrees of freedom locked between each component.
02:54
To view the degrees of freedom offered by the other joint types, switch to the Motion tab and select each Type:
03:03
Revolute releases one rotational degree of freedom as an option.
03:07
As an option, you can choose the axis about which you want the degree of freedom.
03:12
Slider introduces one translational degree of freedom.
03:17
As with Revolute, you can choose which axis you want that degree of freedom to be along.
03:22
Cylindrical has one translational and one rotational degree of freedom.
03:28
Pin Slot also has one translational and one rotational degree of freedom, but the rotation is normal to the direction of the translation.
03:36
Planar offers two translational and one rotational degree of freedom.
03:42
Lastly, Ball offers no translational degrees of freedom, but three rotational degrees of freedom.
03:49
As you begin working on your own designs,
03:52
selecting the correct joint will become more natural, but these are concepts to keep in mind as you continue to work with joints.
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