CAD



I began by creating my model as a whole in Pro/Engineer. I really struggled to visualise it in
seperate parts having never worked in a CAD program before so found it easier to begin as a
whole then split the model up. On the left is one of my earliest drawings. It is made up of half a
solid sphere with two circular extrusions attached to it. I also rounded the edges to emulate
a tyre effect. In the second picture it's clear to see the shaved off sides and my first attempt at
creating the grill. I couldn't get my head around how to do it! In the end I removed the bulk of
the material then re-drew lines accross, extruding and rounding them off to match other
rounded edges on the model. 

Once I had the main solid shape completed I had to split the model to create the individual parts, so
really I made more work for myself by starting as a whole! By saving two copies of the whole model I
could then cut up the model and create to 'halves'. On the left the model appears hollow - who knows
how I got there! By clicking and trying a variety of things I imagine. Anyway, the holes are for
the battery and circuit board so they have to have a base, otherwise the components will fall through.
I created platforms by inserting a new datum plane at the level I wanted the platform and sketching
a rectangle the exact same size as the recesses. I then filled the rectangles in creating solid walls
as can be seen in the picture on the right.

 Here's the front half hollowed out to make room for the speaker which will sit behind the grill. I have
also seperated out the silicone ring piece and the speaker grill. These two pieces will be made on the
3D printer. I am then going to use the ring as a pattern in a silicone mould to make a rubber-style
neon trim for my speaker grill.

 Once all my pieces had been drawn up I assembled all the parts to check it did actually all fit!
It did - phew!

 The final and fully assembled model!! Now to make it...