- [Instructor] Now we've got standoffs
and screw holes in the top half,
and we want to do something similar in the bottom half,
but slightly different, because we want the screws
to come up from the bottom.
Let's edit the bottom part by clicking on it
and pressing edit part.
Then, we want to start a sketch on this inside face.
So left click on it and press sketch,
and then go to normal to view.
At this stage, it's very similar to how we added
the standoff to the top half.
So go to the Sketch tab and choose the circle tool.
And then zoom in on one of the corners.
We want to add circles that line up
with these holes in the PCB.
So hover over a circular edge, move in to that center point,
and left click to start your circle.
Then, just drag out and left click again
to set the diameter.
And then do the same in the next corner.
And then just continue around
until you've got all four of them.
Then you can press escape to close the circle tool.
So now, you can drag a box around all these circles
and we can add equal relation to all of them
by clicking here.
So now they're all the same diameter.
Then, select the smart dimension tool,
click on any of the circles,
and this time we'll set the diameter as nine millimeters.
This is just a little bit larger
than the standoffs in the top half,
and this is just so we can fit a screw head
within the standoff.
Then, go to the Feature tab and press Extruded Boss/Base.
So this time, we're going to do a blind extrude again,
but this time we're going to extrude 6.9 millimeters.
And this just gives us a nice base for the PCB to rest on.
So press okay and those standoffs are added.
Now, we need to add the holes,
but firstly, we're going to open this part directly
directly to Editor.
So just left click on the part
and choose the first option, which is Open Part.
And this just removes a bit of the clutter of the assembly.
As before, we're going to use the Hole Wizard.
So go to the Features tab and select Hole Wizard.
This time though, we're going to use a counterbore hole.
That's the first option here.
So left click to select counterbore.
Then, make sure you're still on ANSI Metric.
And then for the type, let's choose a Pan Cross Head screw.
For the size, let's choose M3 again.
And for the end condition,
this time let's choose Through All.
So all we need to do now is set the position.
Select the Position tab,
and we want to start on this bottom face
because we want the screws to come in from the underneath.
So rotate your model around
and just left click once underneath here.
So now you can see, if you move your mouse around,
we've got the preview following the mouse,
but we can't actually see where the standoffs are
so we can't line up the screw holes.
But to fix this, all we need to do is press normal to,
if you press it twice, we're now viewing from the top,
but we're still placing the holes from the bottom.
So you can zoom in and hover over those circular edges
and just pick up those center points.
If you find that you accidentally click in the wrong place,
something like this, just continue placing the rest,
and then when you're done, press escape,
and that will stop you placing new parts,
and then just drag your point around,
drag it to the outer circle,
and now you can see we've got the center point again.
So then just drag it in.
When you're over the center point, release it,
and now you can see we have a fully defined sketch.
Then you can press okay, press okay on the Hole Wizard,
and now we've added those counterbore holes.
So this wider part is where the screw head fits.
So all we need to do now is rename that standoff feature.
You can do a slow double-click on it in the Feature tree,
and let's just call it Standoffs.
So then you can save your part by pressing Control + S
and we can go back to the assembly
by pressing Control + Tab.
And then finally, just exit editing the part
and save your assembly.