Re-create reciprocating saw motion

00:02

recreate reciprocating saw motion.

00:06

After completing this video, you'll be able to ground a component,

00:09

create a rigid group and use as built joints.

00:14

Infusion 3 60. We're going to carry on with our reciprocating saw motion design.

00:18

At this point we've created the trigger motion but all the rest

00:22

of the components are free to move about inside of fusion.

00:25

So we need to create some rigid groups.

00:27

Figure out which components are fixed and which ones are free to move

00:31

when you're designing an assembly from scratch.

00:33

It's very easy to create groups of components that remain

00:37

rigid and groups of components that are free to move.

00:40

Now it's important to note that when you're dealing with

00:42

an imported model often times it's not the case.

00:45

So to get started we want to figure out which

00:48

components can be fixed and which ones need to move.

00:51

So we're going to start by selecting the saw handle casing,

00:54

we're going to right click and we're going to ground it.

00:57

I also want to take a look at the trigger

00:59

and I'm going to right click and I want to UNgh round the trigger.

01:03

The reason I want to UNgh round the trigger is

01:05

because I want all of the components to be rigid to

01:08

the base housing and that way we don't have a bunch

01:11

of different grounded components that we need to deal with.

01:14

I'm going to hide the trigger itself and then I need to go through the

01:18

assembly and figure out which components can be fixed and which ones will move.

01:22

The first thing that I want to do is I want to take a look at the blade holder assembly.

01:26

This has a lot of sub components and all of

01:29

these will move together as one including the blade itself.

01:32

So I'm going to start by going to

01:34

assemble rigid group and including that sub component

01:38

and then I also want to include the actual blade.

01:41

When I say, okay, now as I move the blade, the entire blade assembly should move.

01:47

This means that now I can hide the blade and I

01:50

can hide the blade holder assembly to simplify my view.

01:54

Next this piece here is actually going to pivot.

01:57

We don't necessarily have to replicate that motion in three D.

02:00

But if we want to we should maintain that the blade guard does pivot about this base.

02:06

Next we have the blade guard assembly

02:08

that is going to be a rigid group.

02:10

So let's select rigid group which automatically includes all the base components.

02:15

If this peace does move, for example, if you need some adjustment,

02:18

you would want to make sure that you don't make it completely rigid.

02:21

However,

02:22

what we're going to do is we're going to create a

02:23

rigid group between it and some of the other components,

02:27

the guide blocks on the inside or going to remain stationary.

02:30

So we need to zoom in and select those

02:33

also the motor,

02:34

the motor internals and the motor housing those are all going to be fixed.

02:39

The small gear is going to move as well as all the other components. So we'll say, okay

02:44

now I'm going to hide the gear housing the guide

02:46

blocks as well as the motor and motor internals.

02:51

The next thing that I need to do is I need to

02:52

find the blade guard assembly and I'll hide that as well.

02:56

Find the gear housing top and I'm going to hide that.

02:60

The battery connector also needs to have a rigid group.

03:03

This can be added to any additional rigid group.

03:06

For example,

03:06

I can right click and edit a rigid group and I can include additional components.

03:11

The battery connector, for example,

03:14

the short rod is going to be part of this gear but the

03:17

long rod here is going to be part of the housing itself.

03:21

We can say, okay, and now this should remain fixed with the housing.

03:26

If we show the housing, you can see that these pieces are free to move about.

03:31

This means that something is not perfectly fixed with the housing.

03:35

If we take a look at our rigid groups, they can be found in our joints folder

03:39

and sometimes these joints will be internal to a sub component. So rigid group one.

03:45

If we right click and edit the rigid group is the entire blade holder assembly.

03:50

We take a look at Rigid Group two and edit,

03:52

you can see that it's including this entire piece here,

03:56

but it does not include the saw handle casing.

03:58

So let's go ahead and include the casing and that should

04:01

be able to show all of the components that are fixed.

04:04

We can see here that it's not giving us the option to say, Okay,

04:08

this housing is fixed. And if we bring back our gear housing,

04:12

this is free to move about.

04:14

So in some cases it might be helpful to create a rigid group just between

04:18

the gear housing and this housing as well and now everything should remain fixed.

04:24

Let's go ahead and hide the saw handle casing,

04:26

the battery connector as well as the trigger.

04:29

And we can hide the gear housing.

04:32

We need to bring back the blade holder assembly as well as the blade

04:37

and one of the guide blocks.

04:41

Now let's start to create some mechanical motion.

04:44

This gear is going to be attached to the motor so let's

04:47

go ahead and bring back the motor or the motor internals.

04:51

I'm going to start from the back and move my way forward.

04:53

We're going to be using as built joints

04:55

because we're making use of the current location.

04:58

There'll be a revolution joint between this motor shaft and the

05:01

gear and it's going to be based around that point.

05:05

Next, we're going to right click and repeat the as built joint.

05:09

It's going to be this gear and the shaft

05:11

and see that the gear moves.

05:14

And we also need to create another rigid group.

05:17

This rigid group is going to include the clip the shaft,

05:21

any bushings

05:25

and it's also going to be fixed to that gear.

05:28

This means as I rotate the gear, the bushing should move with it.

05:33

Next we'll do an as built revolution joint between this link and the bushing

05:40

and we'll repeat the process over here between this link and this bushing.

05:46

Now it's important to note that this

05:47

bushing itself hasn't been necessarily accounted for.

05:51

As we rotate things around, you can see that the components are jumping.

05:55

So we need to use an as built slider joint

05:59

to make sure that the blade guide is fixed relative to this block.

06:05

Now, as we rotate this around,

06:07

you'll note that there was a second link underneath here.

06:10

That second link is problematic because we applied a

06:13

joint between this link and this link here.

06:16

So we need to make sure that we fix that.

06:19

So inside of the component that contains this connecting rod link,

06:23

we want to take a look at the joints that were

06:25

applied and we want to remove one of the crank arms,

06:29

crank arm to isn't needed.

06:31

So I'm going to right click and select remove

06:34

as I rotate this around.

06:35

You can see that the crank arm is now fixed here,

06:38

it can rotate around and everything works fine.

06:41

The other one has been removed.

06:43

Another thing that we need to do is create one more

06:46

rigid group between the blade holder and the two bushings.

06:50

The two bushings aren't going to move, we're going to say, okay,

06:53

and now we can use our as built revolution joint.

06:58

This process can take quite a bit of time,

07:00

especially when you're dealing with an assembly

07:02

that you didn't design from scratch.

07:04

But now at this point we should be able to rotate

07:08

this gear and see the blade move in and out.

07:10

So all the motion is correct.

07:12

However,

07:13

there's one more thing that we want to take care of

07:15

this small gear and the large gear need to move together.

07:18

So under assemble, we're going to create what's called a motion link

07:22

emotion link allows us to select two joints and create a relationship between them.

07:27

So the revolution joint for the small gear and the revolution joint for the big year.

07:32

We also want to take into account the ratio between the two.

07:35

The large gear is 68 teeth and the small gear is 11. We have angles that we can dictate.

07:42

So what we're going to do is for every 68°, the bottom one

07:47

is going to rotate 11 and that should give us the right ratio.

07:51

We might need to reverse the direction

07:55

and say, okay,

07:57

you can see if we made a mistake, we can always go back to the motion link joint,

08:01

edit and uncheck, reverse.

08:04

Now as we move this, you should see that the gears move together.

08:07

There is a slight bit of overlap based on their current location

08:11

but you can see that the gear ratio appears to be correct.

08:15

So I'm going to revert the position and now let's

08:17

take a look at the rest of the assembly.

08:20

If we bring all of the other components back, I'm going to go to the top,

08:24

right click and I want to bring all the different components back.

08:28

So we're going to show all components

08:31

and then we want to take a look at driving the joint on the motor.

08:35

So the way that we can do this is we can go

08:37

to assemble and create a motion study for the motion study.

08:41

We want to pick a specific joint that we want to drive,

08:44

we're going to go ahead and bring this up and then at a point in time, let's say at 40,

08:49

we want this to go 360°.

08:53

So now if we play through,

08:55

it's going to rotate the entire assembly through 360° of the motor rotation.

09:01

Note that the motor rotation needs to rotate

09:04

several times before the large gear goes around.

09:07

Once we can modify these values by editing the points in time.

09:13

So at this point instead of 360°, we need to go something like 360 times 11.

09:21

So when we go that many degrees,

09:23

you notice that mathematical operators aren't working.

09:27

So instead of doing 30 900° of rotation,

09:31

one thing that we can do is we can remove this

09:33

joint and we can select the joint for the large gear.

09:37

This will allow us to put 360° in here which should be a full rotation.

09:42

If we go ahead and loop this and we play through,

09:44

you can see that it is going through the entire motion.

09:47

The small gear is moving because it's got a

09:49

motion link based on the rotation between those two.

09:53

So this is a great way for us to take a look at the mechanical motion of an assembly.

09:58

Figure out if the motion is correct and if we need to make any changes,

10:02

I'm going to select OK.

10:03

But note that we now have a motion studies folder and we

10:05

can go back to that motion study at any point in time.

10:09

Let's go back to a home view temporarily and make sure that we save the design.

10:15

Let's revert the position. 1st. Save the design and talk about one last aspect.

10:20

When we're working on assemblies.

10:22

If we have external components,

10:24

we have the option to replace them by right clicking and replacing a component.

10:28

However, when all the components are internal, we can't do that easily.

10:33

If we wanted to change the link with our link that we designed earlier,

10:37

we would have to bring this into our design by dragging and dropping it

10:41

or inserting it

10:43

and then placing it in the correct location,

10:46

noting that our new link is free to move. It's a component and it has an external link

10:51

with the external link.

10:52

We can right click and replace the component or break the link.

10:56

One thing that we can do is we can use joints to place it in the exact

10:60

location of the original link and then we

11:02

can re associate the joints for this example.

11:05

It's going to be a little bit more complicated,

11:07

but it is great practice for you to insert your own

11:09

link and try to associate the joints with that new link.

11:13

I'm going to revert its position.

11:14

I'm going to hide the new link and I'm going to save the design before moving on.

Video transcript

00:02

recreate reciprocating saw motion.

00:06

After completing this video, you'll be able to ground a component,

00:09

create a rigid group and use as built joints.

00:14

Infusion 3 60. We're going to carry on with our reciprocating saw motion design.

00:18

At this point we've created the trigger motion but all the rest

00:22

of the components are free to move about inside of fusion.

00:25

So we need to create some rigid groups.

00:27

Figure out which components are fixed and which ones are free to move

00:31

when you're designing an assembly from scratch.

00:33

It's very easy to create groups of components that remain

00:37

rigid and groups of components that are free to move.

00:40

Now it's important to note that when you're dealing with

00:42

an imported model often times it's not the case.

00:45

So to get started we want to figure out which

00:48

components can be fixed and which ones need to move.

00:51

So we're going to start by selecting the saw handle casing,

00:54

we're going to right click and we're going to ground it.

00:57

I also want to take a look at the trigger

00:59

and I'm going to right click and I want to UNgh round the trigger.

01:03

The reason I want to UNgh round the trigger is

01:05

because I want all of the components to be rigid to

01:08

the base housing and that way we don't have a bunch

01:11

of different grounded components that we need to deal with.

01:14

I'm going to hide the trigger itself and then I need to go through the

01:18

assembly and figure out which components can be fixed and which ones will move.

01:22

The first thing that I want to do is I want to take a look at the blade holder assembly.

01:26

This has a lot of sub components and all of

01:29

these will move together as one including the blade itself.

01:32

So I'm going to start by going to

01:34

assemble rigid group and including that sub component

01:38

and then I also want to include the actual blade.

01:41

When I say, okay, now as I move the blade, the entire blade assembly should move.

01:47

This means that now I can hide the blade and I

01:50

can hide the blade holder assembly to simplify my view.

01:54

Next this piece here is actually going to pivot.

01:57

We don't necessarily have to replicate that motion in three D.

02:00

But if we want to we should maintain that the blade guard does pivot about this base.

02:06

Next we have the blade guard assembly

02:08

that is going to be a rigid group.

02:10

So let's select rigid group which automatically includes all the base components.

02:15

If this peace does move, for example, if you need some adjustment,

02:18

you would want to make sure that you don't make it completely rigid.

02:21

However,

02:22

what we're going to do is we're going to create a

02:23

rigid group between it and some of the other components,

02:27

the guide blocks on the inside or going to remain stationary.

02:30

So we need to zoom in and select those

02:33

also the motor,

02:34

the motor internals and the motor housing those are all going to be fixed.

02:39

The small gear is going to move as well as all the other components. So we'll say, okay

02:44

now I'm going to hide the gear housing the guide

02:46

blocks as well as the motor and motor internals.

02:51

The next thing that I need to do is I need to

02:52

find the blade guard assembly and I'll hide that as well.

02:56

Find the gear housing top and I'm going to hide that.

02:60

The battery connector also needs to have a rigid group.

03:03

This can be added to any additional rigid group.

03:06

For example,

03:06

I can right click and edit a rigid group and I can include additional components.

03:11

The battery connector, for example,

03:14

the short rod is going to be part of this gear but the

03:17

long rod here is going to be part of the housing itself.

03:21

We can say, okay, and now this should remain fixed with the housing.

03:26

If we show the housing, you can see that these pieces are free to move about.

03:31

This means that something is not perfectly fixed with the housing.

03:35

If we take a look at our rigid groups, they can be found in our joints folder

03:39

and sometimes these joints will be internal to a sub component. So rigid group one.

03:45

If we right click and edit the rigid group is the entire blade holder assembly.

03:50

We take a look at Rigid Group two and edit,

03:52

you can see that it's including this entire piece here,

03:56

but it does not include the saw handle casing.

03:58

So let's go ahead and include the casing and that should

04:01

be able to show all of the components that are fixed.

04:04

We can see here that it's not giving us the option to say, Okay,

04:08

this housing is fixed. And if we bring back our gear housing,

04:12

this is free to move about.

04:14

So in some cases it might be helpful to create a rigid group just between

04:18

the gear housing and this housing as well and now everything should remain fixed.

04:24

Let's go ahead and hide the saw handle casing,

04:26

the battery connector as well as the trigger.

04:29

And we can hide the gear housing.

04:32

We need to bring back the blade holder assembly as well as the blade

04:37

and one of the guide blocks.

04:41

Now let's start to create some mechanical motion.

04:44

This gear is going to be attached to the motor so let's

04:47

go ahead and bring back the motor or the motor internals.

04:51

I'm going to start from the back and move my way forward.

04:53

We're going to be using as built joints

04:55

because we're making use of the current location.

04:58

There'll be a revolution joint between this motor shaft and the

05:01

gear and it's going to be based around that point.

05:05

Next, we're going to right click and repeat the as built joint.

05:09

It's going to be this gear and the shaft

05:11

and see that the gear moves.

05:14

And we also need to create another rigid group.

05:17

This rigid group is going to include the clip the shaft,

05:21

any bushings

05:25

and it's also going to be fixed to that gear.

05:28

This means as I rotate the gear, the bushing should move with it.

05:33

Next we'll do an as built revolution joint between this link and the bushing

05:40

and we'll repeat the process over here between this link and this bushing.

05:46

Now it's important to note that this

05:47

bushing itself hasn't been necessarily accounted for.

05:51

As we rotate things around, you can see that the components are jumping.

05:55

So we need to use an as built slider joint

05:59

to make sure that the blade guide is fixed relative to this block.

06:05

Now, as we rotate this around,

06:07

you'll note that there was a second link underneath here.

06:10

That second link is problematic because we applied a

06:13

joint between this link and this link here.

06:16

So we need to make sure that we fix that.

06:19

So inside of the component that contains this connecting rod link,

06:23

we want to take a look at the joints that were

06:25

applied and we want to remove one of the crank arms,

06:29

crank arm to isn't needed.

06:31

So I'm going to right click and select remove

06:34

as I rotate this around.

06:35

You can see that the crank arm is now fixed here,

06:38

it can rotate around and everything works fine.

06:41

The other one has been removed.

06:43

Another thing that we need to do is create one more

06:46

rigid group between the blade holder and the two bushings.

06:50

The two bushings aren't going to move, we're going to say, okay,

06:53

and now we can use our as built revolution joint.

06:58

This process can take quite a bit of time,

07:00

especially when you're dealing with an assembly

07:02

that you didn't design from scratch.

07:04

But now at this point we should be able to rotate

07:08

this gear and see the blade move in and out.

07:10

So all the motion is correct.

07:12

However,

07:13

there's one more thing that we want to take care of

07:15

this small gear and the large gear need to move together.

07:18

So under assemble, we're going to create what's called a motion link

07:22

emotion link allows us to select two joints and create a relationship between them.

07:27

So the revolution joint for the small gear and the revolution joint for the big year.

07:32

We also want to take into account the ratio between the two.

07:35

The large gear is 68 teeth and the small gear is 11. We have angles that we can dictate.

07:42

So what we're going to do is for every 68°, the bottom one

07:47

is going to rotate 11 and that should give us the right ratio.

07:51

We might need to reverse the direction

07:55

and say, okay,

07:57

you can see if we made a mistake, we can always go back to the motion link joint,

08:01

edit and uncheck, reverse.

08:04

Now as we move this, you should see that the gears move together.

08:07

There is a slight bit of overlap based on their current location

08:11

but you can see that the gear ratio appears to be correct.

08:15

So I'm going to revert the position and now let's

08:17

take a look at the rest of the assembly.

08:20

If we bring all of the other components back, I'm going to go to the top,

08:24

right click and I want to bring all the different components back.

08:28

So we're going to show all components

08:31

and then we want to take a look at driving the joint on the motor.

08:35

So the way that we can do this is we can go

08:37

to assemble and create a motion study for the motion study.

08:41

We want to pick a specific joint that we want to drive,

08:44

we're going to go ahead and bring this up and then at a point in time, let's say at 40,

08:49

we want this to go 360°.

08:53

So now if we play through,

08:55

it's going to rotate the entire assembly through 360° of the motor rotation.

09:01

Note that the motor rotation needs to rotate

09:04

several times before the large gear goes around.

09:07

Once we can modify these values by editing the points in time.

09:13

So at this point instead of 360°, we need to go something like 360 times 11.

09:21

So when we go that many degrees,

09:23

you notice that mathematical operators aren't working.

09:27

So instead of doing 30 900° of rotation,

09:31

one thing that we can do is we can remove this

09:33

joint and we can select the joint for the large gear.

09:37

This will allow us to put 360° in here which should be a full rotation.

09:42

If we go ahead and loop this and we play through,

09:44

you can see that it is going through the entire motion.

09:47

The small gear is moving because it's got a

09:49

motion link based on the rotation between those two.

09:53

So this is a great way for us to take a look at the mechanical motion of an assembly.

09:58

Figure out if the motion is correct and if we need to make any changes,

10:02

I'm going to select OK.

10:03

But note that we now have a motion studies folder and we

10:05

can go back to that motion study at any point in time.

10:09

Let's go back to a home view temporarily and make sure that we save the design.

10:15

Let's revert the position. 1st. Save the design and talk about one last aspect.

10:20

When we're working on assemblies.

10:22

If we have external components,

10:24

we have the option to replace them by right clicking and replacing a component.

10:28

However, when all the components are internal, we can't do that easily.

10:33

If we wanted to change the link with our link that we designed earlier,

10:37

we would have to bring this into our design by dragging and dropping it

10:41

or inserting it

10:43

and then placing it in the correct location,

10:46

noting that our new link is free to move. It's a component and it has an external link

10:51

with the external link.

10:52

We can right click and replace the component or break the link.

10:56

One thing that we can do is we can use joints to place it in the exact

10:60

location of the original link and then we

11:02

can re associate the joints for this example.

11:05

It's going to be a little bit more complicated,

11:07

but it is great practice for you to insert your own

11:09

link and try to associate the joints with that new link.

11:13

I'm going to revert its position.

11:14

I'm going to hide the new link and I'm going to save the design before moving on.

Video quiz

Which of the following Assembly options allow the user to join 5 components to each other in their current location using a single operation?

(Select one)
Select an answer

1/1 questions left unanswered

Step-by-step

It appears you don't have a PDF plugin for this browser.

Was this information helpful?