- [Instructor] As we mentioned in the previous video,
the extra details of your frame really depend
on your own requirements.
For example, now I might want to add some mounting points
for front gears around here.
In this video, we're going to finish off this frame
by adding some cable routing points for that rear brake.
So first, we need to model up the cable holders.
Start a new part.
And start a sketch on the top plane.
Then draw a circle at the origin.
The diameter of this is 5/16 of an inch.
So remember, even if you're working in millimeters,
we can just write in 5/16 in.
And then it will be converted
to the equivalent in millimeters.
Then do a blind extrude,
so go to Features, Extruded Boss Base,
Blind and we want to extrude half an inch.
So it's 12.7 millimeters.
Next, start sketch on this to face.
Get another circle and draw another circle at the origin.
This one is six millimeters diameter.
And we want to cut down
but not all the way through the part.
So let's go to Features, Extruded Cut
and we want to do a blind cut for the depth.
It should be .45 inches.
So we can type in 0.45 in.
And that will be converted to millimeters.
So we're just cutting down just that far.
Next up, there's a slot that goes all the way through
to hold the cable.
So start sketch on this face.
Go normal to and get the slot tool
and then choose a straight slot,
which is this first option.
This should start from the origin
and go directly down
and be about that size.
Then for the width,
this is 3/32 of an inch wide.
So select these two points.
Type in 3/32 in.
And then that will be converted to millimeters.
And then for the endpoint here,
we can just grab this middle point
and just drag it back to the circle
just so the sketch is fully defined.
Then let's go to Features, Extruded Cut
and we can just go through all.
So that slot goes all the way through the part.
Next up, we want to flatten off this face
just to make it a bit easier to weld this bar
onto the frame.
So start sketch on that top face.
Go normal to
and then choose that outer edge
and press Convert Entities.
So now the outer edges is a new line in this sketch.
Then get the line tool
and let's just draw a horizontal line like this.
Make this 3.5 millimeters
above the origin.
And we just want to cut away this little section.
So get the trim tool.
Select power trim
and then just drag through those parts we don't need.
So trim away those parts
and we're just going to cut away that section.
Then go to Features, Extruded Cut
and we can through all again.
So we've flattened off that edge
and then to finish off,
let's just round off these corners
with a small fillet.
So get the fillet tool.
Add a half millimeter fillet.
And let's just select these edges.
Just to round them off a little bit
and also this one.
And then that part is finished.
So you can save this part
and let's call it Cable Guide.
Now we can go back to our assembly
by pressing Control and Tab
and we can insert that new part.
So go to Assembly, Insert Component
and select the Cable Guide.
Remember, if you don't see it there,
you can press browse to find it on your computer.
So it's really up to you
where you place these depending on your brakes
and your frame layout out.
I'm going to place mine around here.
Going to drag it around to about the correct orientation.
So the open part is facing to the back
and then I'm going to fix it in place using mates.
So I'm going to expand the cable guide part
in the parts tree.
Select the right plane
and then also select the right plane of the assembly
and make those coincident.
Then I'm going to select the top tube.
We're going to move around
and select the flat underside there
and I'm going to make those tangent.
So now the part should be fixed on the top tube.
We can still move backwards and forwards.
To set the distance,
I'm going to find the cable guide part again,
I'm going to find the origin
and then hold down Control
and I'm going to select the endpoint of this line.
It can be quite hard to see
but it should be around there.
And again, this distance is up to you.
I'm going to make mine 100.
So that part is now fixed.
All we need to do to finish off
is add another similar part at the front,
facing the other way.
So we could go to Assembly, Insert Components again.
But instead actually, we can just zoom in.
We can hold down Control,
we can just left click and drag from that part.
And we'll add a copy of it.
So now we have two cable guides in the parts tree.
So now let's move it to roughly the right position.
I'm going to drag it around
so it's facing forwards.
And then I'm going to expand the part,
select the right plane
and then also select the right plane
of the assembly and add a coincident mate.
Now we're going to add some similar mates,
but first, I'm going to drag the part around.
So it's almost exactly lined up where we want it.
This can just avoid you having errors
with your mates being added back to front.
So let's drag it around so it's sort of almost exactly
in the right place that we want.
Like so.
Then let's select the top tube.
Also select the underside tangent face.
And add a tangent mate.
And it should be added in about that position.
If you have any problems,
if it flips around, and maybe goes onto the bottom,
then try just deleting those mates
and re-adding them.
So first, add that coincident mate
with the right plane and the right plane of the assembly
and then move it around to about the right place
and then select that flat underside face
and make it tangent with the top tube.
Then finally, we just need
to set the distance front to back.
So I'm going to expand the cable guide part.
I'm going to select the origin
and then I'm also going to select the front point
of that line like so.
And then I'm going to try 120 millimeters
and that seems to work pretty well.
So at this point,
you can continue adding more details like this
or you can just save your assembly.
In the next chapter,
we're going to add some more off-the-shelf components
to make the model look a little bit better
and to check everything works as expected.
If you want to check your assembly
against the exercise files at this point,
then the starting point of the next chapter,
chapter five, is the same as the endpoint
that we're currently at now.