Documentation
Brainstorming Ideas
I came into this class with the grand idea of recreating Honey Lemon's Purse so I am currently working on
trying to design it parametrically. I am going to work on the first subsystem which is going to be a
carousel that is supposed to resemble a strap of a purse.
Parametric
I am a huge huge fan of Onshape so that is what I am going to use and start off with a variable studio.
Some of the things I know I am going to use are bearings so I am going to make sure to have variables so
that I don't have to keep changing dimensions. Apart from that some of the bigger dimensions should also
be able to change without affecting everything.
Starting the Design
It is always a lot easier for me to start to design something by sketching it 2d with angles rather than jumping
straight into the CAD. So here are some sketches about how this is going to go down
Designing the Subsystem
The way it breaks down is three rollers that work with a plastic as the conveyour belt. Right now
I am trying to figure out how to make sure the whole system stands up. The rollers need to somehow attach
to two plexiglass plates while still being able to smoothly turn. Only one of the rollers is connected to
a pulley and that in turn is connected to a motor but then the follow up question is how to connect those
to the plexiglass as well and then overall connect it to the other subassemblies.
CADing
I started the CAD and decided I wanted a master sketch in this subassembly that everything else builds off of
and it is so so gorgeous and clean with the variable studio as well.
The only thing is the way I had imagined
connection the roller to the acrylic was by making it fit into a bearing that would fit into the plexiglass
and then I realized if I did that I wouldn't have a way to attaching the pulley to one of the rollers and the
motor as well. So I have to figure out a way to create enough spacing to put the pulley and motor.
I figured it out:
I can just do what i am doing and slice in a pulley into the middle. One thing about the pulley is that
it is an STL I didn't design so it is a little but harder to work with on Onshape but I can just export it
all together and it becomes one object. I also need to design if the case is going to be entirely covering all the subsystems
or if there needs to be some form of separation. Also I am kind of concerned that the bearings will just pop outbut i
can design something that screws onto the acrylic and holds the bearing in place because only the inside needs to rotate.
One of the reasons I love parametric design is because sometime you just mess up with the size and it makes your
life so much easier. For example my bearing holders... are the wrong size
but i can fix them super fast
All done!!
