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Transcript
00:02
How to modify sketch entities?
00:05
After completing this video,
00:06
you'll be able to
00:07
use offset,
00:09
create a filet,
00:10
create a champfer,
00:11
and trim a sketch entity.
00:14
In Fusion,
00:15
we want to get started with a new untitled document.
00:18
We're going to begin by first creating a sketch and selecting the front plane.
00:22
We're going to begin by using a 2 point rectangle,
00:25
selecting the center rectangle option from the sketch palette,
00:28
and placing it at the origin.
00:31
We're gonna manually enter a value of 150 millimeters,
00:34
hit the tab key,
00:36
and enter a value of 75,
00:38
and then enter on the keyboard.
00:40
This will allow us to create a fully defined sketch rectangle.
00:44
When we're creating sketches,
00:45
oftentimes the creation is only a part of that process.
00:49
We also have access to modification tools,
00:51
things like adding filets or champers,
00:53
as well as offsetting or trimming sketch entities.
00:57
To take a look at how this works,
00:58
let's go ahead and use our line tool,
01:01
and we're going to go up,
01:03
over
01:04
and back down
01:05
before finally hitting the escape key.
01:08
When we have a sketch profile,
01:10
these profiles are used downstream to create solid
01:13
geometry for things like extrudes and revolves.
01:16
But oftentimes we want to simplify our
01:18
sketches by creating a single sketch profile.
01:21
In this case,
01:22
we would have to make two selections before
01:24
using this profile for something like an extrude.
01:27
And while this is a simplified case,
01:29
as our sketches become more complex,
01:31
it becomes harder and harder to make sure that we select all the correct geometry.
01:35
Because of this,
01:36
we may find the need to use tools like trim or extend.
01:39
The trim extend and break tools all will
01:42
modify specific areas of our sketch entities.
01:45
For example,
01:46
if we use the brake tool,
01:48
we can select a specific area that we want to break a sketch line.
01:52
We can see a red X on the screen,
01:53
and if we click here,
01:55
what we're able to do is break this up into two different lines.
01:59
If we use our trim tool,
02:00
the trim tool will allow us to use the
02:02
intersection of sketch entities to remove other sketch entities.
02:06
In this case,
02:07
let's go ahead and hit escape to get off the trim tool.
02:11
The extend tool will allow us to take a sketch
02:13
entity and extend it out to its next intersection.
02:17
So these tools in conjunction with several others will allow us to create
02:21
complex profiles by building overlapping sections and
02:24
then modifying them after the fact.
02:27
Let's go ahead and hit escape.
02:29
Next,
02:30
we want to take a look at some of the modification tools like filets and champers.
02:34
A filet will allow us to select a corner
02:36
and round it off by removing the sharp point and adding a tangent arc.
02:42
Let's go ahead and right click,
02:43
select OK to accept that.
02:45
The Chamer tool,
02:46
on the other hand,
02:47
allows us to break the corner by having a reduced angle.
02:51
In this case,
02:52
instead of having 90 degrees at this corner,
02:54
we can add a chamfer and have 45 degrees at this corner.
02:59
In most cases,
02:60
what we'll want to do is add filets and champers to our solid model geometry,
03:04
rather than adding them at the sketch level,
03:06
but we do still have access to these tools.
03:09
Keep in mind,
03:10
in some cases you'll see warnings whenever you're adding,
03:13
breaking,
03:14
or removing geometry like a center point rectangle.
03:18
Because sketch geometry has constraints applied to it by default.
03:22
In some cases,
03:23
when we begin to modify them,
03:24
we get warnings from Fusion telling us that we've broken some constraints.
03:29
In most cases,
03:29
we simply need to go back and add
03:31
dimensions or constraints to fully define our sketches.
03:35
Let's also take a look at another tool,
03:37
offset.
03:38
The offset tool allows us to select curves
03:41
and then create an offset variation of that.
03:45
In the case of geometry such as a filet,
03:48
as we get inward of its value,
03:51
so in this case,
03:51
a 15 millimeter radius,
03:53
as soon as we cross 15 millimeters,
03:56
that entire arc is going to be removed and a square or sharp corner will be added.
04:01
As we go the other direction,
04:03
that filet will get larger and larger
04:05
until this short straight section is going to disappear.
04:09
Fusion is able to heal and modify this geometry on the fly,
04:13
but there is also an option called match topology.
04:17
Match topology will allow us to go up to
04:19
the point that we get to remove sketch entities.
04:23
So for example,
04:23
on the inward,
04:24
as soon as that arc is going to disappear and a sharp corner is added,
04:28
we'll have an error telling us that we have gone past that match topology.
04:32
So this can be a very helpful feature.
04:35
We can also do this as a two-sided feature,
04:37
meaning we're adding an offset on the inside and the outside.
04:41
Let's go ahead and say,
04:42
OK,
04:43
we're going to double click this inside original curve and
04:46
we're going to use the line type option construction.
04:49
This means that we've now got this closed profile that we can
04:52
select for our future features such as an extrude or a revolve.
04:56
In many cases,
04:57
using modification tools such as trim,
04:59
break,
04:60
or extend can simplify the way in which you build out your original sketches.
05:05
So make sure that you do play around with not only the creation tools,
05:07
but the modification tools that you have available.
05:10
And once you're done,
05:11
go ahead and finish your sketch,
05:13
and then we can move on to the next step.
Video transcript
00:02
How to modify sketch entities?
00:05
After completing this video,
00:06
you'll be able to
00:07
use offset,
00:09
create a filet,
00:10
create a champfer,
00:11
and trim a sketch entity.
00:14
In Fusion,
00:15
we want to get started with a new untitled document.
00:18
We're going to begin by first creating a sketch and selecting the front plane.
00:22
We're going to begin by using a 2 point rectangle,
00:25
selecting the center rectangle option from the sketch palette,
00:28
and placing it at the origin.
00:31
We're gonna manually enter a value of 150 millimeters,
00:34
hit the tab key,
00:36
and enter a value of 75,
00:38
and then enter on the keyboard.
00:40
This will allow us to create a fully defined sketch rectangle.
00:44
When we're creating sketches,
00:45
oftentimes the creation is only a part of that process.
00:49
We also have access to modification tools,
00:51
things like adding filets or champers,
00:53
as well as offsetting or trimming sketch entities.
00:57
To take a look at how this works,
00:58
let's go ahead and use our line tool,
01:01
and we're going to go up,
01:03
over
01:04
and back down
01:05
before finally hitting the escape key.
01:08
When we have a sketch profile,
01:10
these profiles are used downstream to create solid
01:13
geometry for things like extrudes and revolves.
01:16
But oftentimes we want to simplify our
01:18
sketches by creating a single sketch profile.
01:21
In this case,
01:22
we would have to make two selections before
01:24
using this profile for something like an extrude.
01:27
And while this is a simplified case,
01:29
as our sketches become more complex,
01:31
it becomes harder and harder to make sure that we select all the correct geometry.
01:35
Because of this,
01:36
we may find the need to use tools like trim or extend.
01:39
The trim extend and break tools all will
01:42
modify specific areas of our sketch entities.
01:45
For example,
01:46
if we use the brake tool,
01:48
we can select a specific area that we want to break a sketch line.
01:52
We can see a red X on the screen,
01:53
and if we click here,
01:55
what we're able to do is break this up into two different lines.
01:59
If we use our trim tool,
02:00
the trim tool will allow us to use the
02:02
intersection of sketch entities to remove other sketch entities.
02:06
In this case,
02:07
let's go ahead and hit escape to get off the trim tool.
02:11
The extend tool will allow us to take a sketch
02:13
entity and extend it out to its next intersection.
02:17
So these tools in conjunction with several others will allow us to create
02:21
complex profiles by building overlapping sections and
02:24
then modifying them after the fact.
02:27
Let's go ahead and hit escape.
02:29
Next,
02:30
we want to take a look at some of the modification tools like filets and champers.
02:34
A filet will allow us to select a corner
02:36
and round it off by removing the sharp point and adding a tangent arc.
02:42
Let's go ahead and right click,
02:43
select OK to accept that.
02:45
The Chamer tool,
02:46
on the other hand,
02:47
allows us to break the corner by having a reduced angle.
02:51
In this case,
02:52
instead of having 90 degrees at this corner,
02:54
we can add a chamfer and have 45 degrees at this corner.
02:59
In most cases,
02:60
what we'll want to do is add filets and champers to our solid model geometry,
03:04
rather than adding them at the sketch level,
03:06
but we do still have access to these tools.
03:09
Keep in mind,
03:10
in some cases you'll see warnings whenever you're adding,
03:13
breaking,
03:14
or removing geometry like a center point rectangle.
03:18
Because sketch geometry has constraints applied to it by default.
03:22
In some cases,
03:23
when we begin to modify them,
03:24
we get warnings from Fusion telling us that we've broken some constraints.
03:29
In most cases,
03:29
we simply need to go back and add
03:31
dimensions or constraints to fully define our sketches.
03:35
Let's also take a look at another tool,
03:37
offset.
03:38
The offset tool allows us to select curves
03:41
and then create an offset variation of that.
03:45
In the case of geometry such as a filet,
03:48
as we get inward of its value,
03:51
so in this case,
03:51
a 15 millimeter radius,
03:53
as soon as we cross 15 millimeters,
03:56
that entire arc is going to be removed and a square or sharp corner will be added.
04:01
As we go the other direction,
04:03
that filet will get larger and larger
04:05
until this short straight section is going to disappear.
04:09
Fusion is able to heal and modify this geometry on the fly,
04:13
but there is also an option called match topology.
04:17
Match topology will allow us to go up to
04:19
the point that we get to remove sketch entities.
04:23
So for example,
04:23
on the inward,
04:24
as soon as that arc is going to disappear and a sharp corner is added,
04:28
we'll have an error telling us that we have gone past that match topology.
04:32
So this can be a very helpful feature.
04:35
We can also do this as a two-sided feature,
04:37
meaning we're adding an offset on the inside and the outside.
04:41
Let's go ahead and say,
04:42
OK,
04:43
we're going to double click this inside original curve and
04:46
we're going to use the line type option construction.
04:49
This means that we've now got this closed profile that we can
04:52
select for our future features such as an extrude or a revolve.
04:56
In many cases,
04:57
using modification tools such as trim,
04:59
break,
04:60
or extend can simplify the way in which you build out your original sketches.
05:05
So make sure that you do play around with not only the creation tools,
05:07
but the modification tools that you have available.
05:10
And once you're done,
05:11
go ahead and finish your sketch,
05:13
and then we can move on to the next step.
After completing this video, you'll be able to:
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