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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.
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.
Step-by-step