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Week 3 - Fab Academy - Assignment Exercises Computer controlled cutting
This week's assignment exercises involve using a laser cutter and are divided into four small tasks:
First Task: Drawing a Square
- Set different speeds and power levels on the laser cutter, observe the cutting results on the acrylic board, and select the appropriate speed and power. There are a total of four experiments, with speed increasing from 10 to 40 in increments of 10, and power increasing from 20 to 80 in increments of 10.
| Power(W)\Speed(ms/s) | 10 | 20 | 30 | 40 |
|---|---|---|---|---|
| 20 | y | n | n | n |
| 30 | y | n | n | n |
| 40 | y | y | n | n |
| 50 | y | y | n | n |
| 60 | y | y | n | n |
| 70 | y | y | y | n |
| 80 | y | y | y | n |
Second Task: Drawing Strips
- Draw ten strips, each 5 mm wide, and use a caliper to measure the width of the ten strips to calculate the radius of the laser.
- The measurement results show that the laser's radius is 0.18 mm.
Third Task: Hexagonal Pattern
- Draw a simple hexagonal pattern that can be assembled into different patterns through the protrusions and indentations on the edges.
- Using the laser radius calculated from Task 2, set the kerf parameter to 0.18. The cutting result is shown below, with some shortcomings that will be optimized in future tasks.
- When using Fusion 360 for drawing and laser cutting, in order to avoid inaccurate cutting results, we introduce the concept of "kerf," adjusting the dimensions of the design by subtracting or adding the radius of the laser beam to correct cutting errors.
Fourth Task: Mini Laser Cutter
- The following is the drawing process of the laser cutter, similar to the 3D printed version, divided into three parts: left and right brackets, front and back, and top supports, as well as a base plate. The front and back supports can be fixed with clips. The printed result is shown below.
