7- Computer-Controlled Machining¶

Assignments¶

Group assignment:¶

Complete your lab’s safety training
Test runout, alignment, fixturing, speeds, feeds, materials and toolpaths for your machine
Document your work to the group work page and reflect on your individual page what you learned

Individual project¶

Make (design+mill+assemble) something big Learning outcomes
Demonstrate 2D design development for CNC milling production
Describe workflows for CNC milling production

Learning outcomes¶

Demonstrate 2D design development for CNC milling production
Describe workflows for CNC milling production

This is my roadmap for this week here

Group Assignment¶

For this we learned how to use the cnc machine. This will be in our group assignment here

The CNC machine at our lab is the ShopBot PRS.

Workspace: 2400mm x 1220mm

Speed: We used the speed of 10000 RPM to cut our design

Software: ShopBot Control Software for operation

Fixture: Cutting material is attached using clamps.

Setting origins: We use shopbot3 software to set the origins. Proximity sensors are used. For the z axis you have to manually set the origins through the use of zeroing.

Safety Measures

Wear (PPE)personal protective equipments: protective goggles and ear defenders.
Never leave the equipment running unattended.
Keep hands, hair(Tie up (long) hair neatly) and attire away from moving components.
Use suitable feed rates and spindle speeds for different materials.
Make sure the emergency stop button within reach
Clean up the work are afterwards and store equipments nicely.

Reflection

Overall, I found this machine less scary looking after actually learning how to use it. It was actually pretty fun learning how to use it, and I felt deff after the whole process.

Individual Assignment¶

For this assignment, I decided to make a shelf to try out the cnc machine . I searched up refrences to see what type of shelf i wanted to make and came across a video of a shelf with an intresting design.

Heres how it looks:

shelf

image_sourse

I will be adding less units though, and a solid back to make sure its more stable

Designing¶

Step 1 - Make a sketch of how you want it to look - specify the measurements

sketch

Step 2 - Create parameters

paremeters

Step 3 - make the Base of the design

change to center

extrude design

Step 4 - Add new body

measurements

Extrudeing the design can also be in the negatives depending on your design

extrude base

Your design will end up joining if you don’t change these settings, so make sure to change it to new body to add the sloths later on.

new body

more than 1 body

Adding sloths¶

Step 1- Rectangular pattern

Use this tool to help you allign your sloth in the begnining.

use to allign

Make a sketch with the dimensions of the thickness of the material and the lenght you want your sloth to be.

make sloth

this is what you need to select to be able to make the pattern for your sloths

rectangular pattern select

Now, select the edges of the rectanglur pattern you made and select the direction of the pattern.

select the edges

Pull the arrow in the direction of where you want the patter to be.

rectangular pattern

Step 2- Extrdude the teeth

Select the faces of each of the sloth(keep pressing shift to select all) and then extrude it(you can click on e on your keyboard as an shortcut)

extrude teeth

Dog bone¶

The end of the mills of the cnc machine are round and circular, so the

You can download dogbone[here]https://tapnair.github.io/Dogbone/()

Step 1- Download the file

You can find the link to download [here] (https://tapnair.github.io/Dogbone/)
Download the link, unzip the file, and then follow this tutorial to be able to install it as a tool in fusion 360.

Step 2 - Select the edges and use the dog bone tool to make curve like dents in the inward edges.

db 1