In Project Three, students were tasked with building a product using CAD and three different manufacturing machines.
There were two types of manufacturing at works here.
Addtive and Substantive
Additive manufacturing is newer and efficient than subtractive manufacturing. Additive allows the user to build the part from the ground up and use the right amount of material. This makes less waste. The only problem is Additive manufacturing is more expensive and slower than subtractive. Right now, at least, subtractive is cheaper and quicker. This is better for mass producing many parts that are identical. Additive would be better for building parts that you would need to modify and change quickly.
FDM vs SLA
FDM stands for Fused Deposition modeling. This works by heating the material until its soft enough that it could be placed precisely where it's suppose to be. SLA, which stands for StereoLithoGraphy, uses a liquid resin and is harden by us UV lights.
The Machines we used
Formlabs Form2 3D Printer
This machine is a 3D printer so it uses Additive Manufacturing. Compared to the MakerBot Replicator2, this machine is more expensive, but is has a higher resolution so you can print objects with more details. This machine also uses stereolithography and clear resin.
MakerBot Replicator 2 3D Printer
This machine is also a 3D printer so is uses Additive Manufacturing. Compared to the Formlabs 3D printer this is a lot cheaper and has a lower resolution. This machine uses Fused deposition modeling for printing. It also uses PLA which has a large variety of colors.
This machine uses subtractive manufacturing. This works by putting a block of wood in the macnine and loading your CAD file into it and the drill if crave at the wood to create the product. This is the least precise machine due to the all the moving parts and the drill bit cutting in circles. This machine is also unable to make sharp cuts. This would be good more making inexpensive prototypes.
This machine uses Subtractive Manufacturing. This is the most precise of the four machines because it has the least moving parts. This machine can cut and engrave. This is the most expensive of the machines, but it is also the quickest and the best at mass producing many parts that are identical.