11. mechanical design, machine design – Group Kuriyama¶
I thought it was cute when I first saw the bear in the mountains. But after the bear left I felt very scared and realized I didn’t know what to do. In Hokkaido, where we live, there are wild bears. So I thought I should tell children that bears are not only cute. I think bears look very different in the wild than in zoos.
Also, We thought that making this game could be applied to Suzuki-san’s final project, so we decided to create it.
This is group assignment page of mechanical design, machine desig (Kuriyama Student) :
Group assignment¶
- actuate and automate your machine
- document the group project and your individual contribution
What we’ve done this week¶
Atsufumi Suzuki¶
Design the machine by Fusion360¶
First, I created a machine the base moves in the x-axis direction with a stepper motor
A stepper motor moves the base to the left and right in the x-axis direction.
This mechanism is also be used for my final project, a trash separator part.
BOM¶
Sorting machine part¶
| Parts | Required Number | Use |
|---|---|---|
| shaft φ8 mm x 800 mm | 2 | The two shafts serve as guides for moving the platform in parallel. |
| Stepper Motor Nema17 | 2 | To control the bear’s marionette / To move the base |
| Servo Motor SG90 | 3 | To rotate the panel that will be the target (boy, flower, pig) |
| timing belt | 1 | Belt to transfer the power of the stepper motor to the base |
| timing pulley | 1 | Pulleys to operate the belt |
| Linear Bushings LM-8UU | 2 | Linear bushings to allow the base to move smoothly over the shaft |
| Half Screw with Hexagon Hole | 1 | Shaft for rotating pulley |
| stepper_case.stl [.stl] | 1 | Case to put into stepper motors |
| roller_case.stl [.stl] | 1 | Case to put into pulley |
| base.stl [.stl] | 1 | moving base to attach bear marionette |
Created shafts (φ8 mm x 800 mm)
Create linear bushing and thread it through the shaft
Linear bush and Timing belt can be attached to the back of the base.
Attached the base.
Attached the stepper motor and the rotary shaft screw
Created the case for the stepper motor and the rotary shaft screw
3d printed and assembled the following
Electric circuit¶
The Electric circuit was built as follows
Code¶
The code is explained on Atsufumi Suzuki’s week11 page
Image recognition part¶
Created the following parts to hold the Raspberry Pi camera in place.
| Parts | Quantity |
|---|---|
| Raspberry Pi 4 | 1 |
| Camera module | 1 |
| Tact Switch | 1 |
| 10kΩ Resistor | 1 |
Electric circuit¶
The Electric circuit was built as follows
Code¶
The code is explained on Atsufumi Suzuki’s week11 page
Rasppbery Pi Image recognition Code
Kurumi Shiowaki¶
I was in charge of machine and mechanical design of bear and targets.
Servo motor for targets
Stepper motor for bear
Video editing, compositing and animation of title.
We invited the kids for field study. They were excited to play and enjoy it.
A girl said “the bear is scary”. So I would say that I was able to show the kids how scary bears can be.
Links to Files and Code¶
-
Sorting machine
-
Camera part
-
Create the gears for bear and targets on Fusion[.f3d]
- Gear for bear and targets[.dxf]
- Design of bear and targets[.ai]
- Test the bear gear on AE[.aep]