Assignment:
The task for this week was to learn how to use CNC Cutting to create another tile, this one only being 30x30x5mm. CNC Cutting stands for Computer Numerically Controlled Cutting and relies on using a CAD model to generate G-Code that the CNC machine can read.
CNC Machines generally use three kinds of cutters; Flatnose cutters, ballnose and bullnose cutters. For this assignment we had to use a 3mm ballnose cutter to start off with. These are good for parts which have a lot of slopes of rounded edges. Flat noses cutters are good for work which requires simple steps up and down, finally, bull nose cutters are used for work with small slopes or steps that also have a large flat surface to mill. Both a Ballnose and Bullnose cutter will be used in this assignment. 
This tile has been designed according the rules of CNCing and to be built using a 3mm ballnose bit.
The process begins with entering the “CAM” environment of Fusion. This is the space that takes your model and allows you to set up the CNC process
This is the finished simulation of the process. Because it was using such a large ballnose cutter, achieving a perfectly flat surface is impossible. In order to do this, we need to change the cutter to a bullnose. You can also see that the slope is just two step downs and has caused a bumpy and uneven slope.
This is what the simulation will look like when a 3mm Bullnose cutter is used. The surface has been cut flat. O also reduced the steps down to make the slop much smoother. There was a small issue with the area around the H milling out slightly deeper and i wasn’t able to fix that this week. It’s something to do with the setup of the levels.
Finally, i reduced the steps to 0.1mm with the 3mm ball nose and got this as my result.
Project Downloads
Further Reading/ Referencing
Assignment Documentation – Derek Covill
