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Back to Tutorials
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Part 8 The Low Vertices Model
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Turn off the transform
manipulator (hand icon)
Click
File in the top left hand corner and select "Append or Link"
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608-Bearing.blend and from the options choose "Object". The
components will now be listed. RMB
on the components highlighted. |
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The five components will
now be loaded in your file. If they are not
visible open the outliner and make sure the eye icon is open.
We need to join these components to make a single object. |
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In the outliner select
the five components and then with the mouse cursor over the 3D window
press Ctrl-J.
The components will be joined into a single mesh.
Tab
into Edit Mode and press A
to
select all the vertices.
We only need a single cross section of vertices above the centre of the
bearing. |
| This cross section will be modified to reduce the number of
vertices and then spun around the centre to form the bearing. |
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In front view press B
twice to bring up paint select, reduce the size of the
selection
circle with the SW
and pressing |
the MMB
paint over the vertices
directly above the centre.
The
vertices will become deselected. Press X and delete all
the remaining selected vertices. |
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Were
now left with a cross section through the bearing but still with far to
many vertices and a lot of unnecessary internal detail.
We will start stripping out the detail by remaking the corner fillets
with a smaller Step: value. |
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Select the lowest vertex
on the top left corner fillet and extrude it 0.6mm on the Y axis. This
will give us the fillet centre point. |
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Snap Ctrl-S,
Cursor->Selection onto the fillet centre. select the existing
internal fillet vertices and delete them.
Select the original lowest fillet vertex and in the Mesh Tools panel
set Degr:90 and Step:4.
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Press Spin to create the fillet, this time with three fewer vertices.
Delete X
the vertex on the fillet center.
Repeat this on the bottom left fillet. |
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We now need to create a
continuous external profile of the bearing, combining all the outer
vertices of the loose parts.
Cut two new vertices through the left circlip
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snapping the line to the
edge of the circlip groove's chamfer.
K Knife Exact, snap the cut line Ctrl-LMB to the
circlip groove chamfer's. |
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Add an edge between the
groove and the circlip F.
Repeat this and cut a new
vertex on the dust shield with the snap line cut from the lower right
chamfer of the circlip |
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The offset fillet's of
the dust shield still have more vertices than are needed.
From the top vertex of the top fillet extrude an edge -0.1 in the Y
axis.
Snap the cursor to this new vertex which is on the fillet centre.
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Select
the internal vertices of the fillet and delete them. |
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Select the top vertex
from the original fillet and spin this to form the new fillet.
In the Mesh Tools panel set Degr:60 Step:4 and press Spin.
A new fillet has been created with three fewer vertices.
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Move to the lower dust
shield fillet and repeat the above process.
This time extrude the bottom vertex
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| of the inner fillet 0.1mm
on
the Y axis to set the centre point. Snap the cursor to this. |
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| Select the bottom outer
vertex of the original fillet and spin this Degr:60 Step:4
The vertices of the lower dust shield fillet have been reduced. Delete
the fillet centre vertex. |
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Cut a new vertex on the
inner race from the dust shield bottom fillet. K Knife Exact, Ctrl-LMB to snap the
cut to the chamfer. l
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We
now have a continuous
outer edge of vertices down the left hand side of the cross section,
rather than repeating this on the right hand side we can delete all the
other vertices and mirror this line of vertices onto the right hand
side.
Box select B
all the vertices on the right hand side of the cross section including
the bearing groves. Delete these X. |
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Paint
Select B-B
the
remaining inner vertices and delete these.
Tab
into Object Mode and snap the cursor to the object centre. Shift-s
Cursor->Selection. |
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The cursor is now set on
the bearing centre so we can mirror the left hand profile onto the
right hand side of the bearing.
With the pivot point set to "3D Cursor" Tab into
Edit Mode and select all vertices A.
Duplicate (copy) the vertices Shift-D
then Esc to
leave the copy over the top of the original.
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Press Ctrl-M
to open the Mirror menu and choose "X Local". The copy will
now be mirrored to the other side of the bearing. |
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Re-make the
top and bottom edge by selecting a vertex either side of the opening
and pressing F.
Select all A and
remove doubles W
to merge any doubled up vertices.
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Go into front view NumPad 1.
In the Mesh Tools panel set Degr:360 and Step:32. Press Spin to form
the 3D Bearing.
Select all A, remove
doubles W
and in the Link and Materials
panel "Set Smooth".
As the bearing was created from the original components, an Edge Split
modifier will still be activated on this object. |
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In the Link and Materials
panel rename the object OB:608-BearingSmall.
Save
the .blend file as 608-BearingSmall.
This
version
of the bearing has 2240 vertices, far fewer than the 26,000+ vertices
of the detailed bearing. With 60 of these bearings in the CNC assembly
it will still only require the computer overheads for 134400 vertices.
This
completes the modeling of both versions of the bearing. In the next
part we will look at adding basic materials to the bearing and
rendering a 3D view and an exploded view of the bearing. |
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