18. Mechanical design, machine design¶
Group assignment:
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Actuate and automate your machine
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Document the group project and your individual contribution
Group page¶
Our mechanical design and machine design group page can be found here.
Sketch¶
Our idea is to make a drawing machine inspired by this Printing Machine.
List of components:
| Component | Qty | Function | Production |
|---|---|---|---|
| SG-90 Servo motors | 3 | Moving the platform (Y), Pen height adjustment, Pen carriage positioning (X) | Fablab inventory |
| Gears (2 types) | 1 | Z axis pen positioning | Laser cutting |
| Gear holder and 2 servo holders | 2 | Laser cutting | |
| Aluminium rod | 1 | Combined with 2 gears moving the stage | Fablab inventory |
| Motor mounts | 2 | Fixing the positions of the motors | 3D printing |
| Geared rails | 3 | 2 to move the stage (Y), 1 to move the pen carriage (X) | Laser cutting |
| Pen holder | 1 | 3D printed with a bolt screw M3 | 3D printing |
| Arduino Uno board | 1 | Controlling the system | Fablab inventory |
| Carcass | 1 | Mount for all the components: 1 Bottom, 2 Sides, 3 Front hold, 2 Rails | Laser cutting |
| Pen | 1 | Drawing | Shop |
| Glue | 1 | Shop |
Individual contribution¶
I was in charge of making and updating the project page since I work from Tampere and other members of the group are working in Oulu.
I did also make one version of the pen holder design. We are using SG-90 Servo motor to control the pen movement so I dowloaded a 3D model of it in order to design the pen holder around it.
I made sketch in order to extrude a part that holds the pen.
Next I made sketch to create a thread hole for the screw that holds the pen in place.
I extruded screw thread part and head part and made a joint to have the actual thread with help of this tutorial.
Final design of the parts:
