I was always fascinated by pendulums and the unpredictability of it. Thus I build the linkage to draw. And we can only affect but not in total control of it.
And I enjoy the “humanity” of machine. I enjoy implicit interaction. I would like to not intentionally interact with a machine, but subtly feel the reaction and the mood.
At first I want to use light sensor and distance sensor to control it. The light act as a switch. Imagine a dar room, in silence. You walk in, and open the light, which focus on the drawing machine. Then it starts to move. You heard the rustling. And you walk close by to see what happens. As you approach, it changes the pattern of drawing. And you walk around and observe, while it finishes a beautiful abstract art piece.
Also, Sam mentioned we saw bunch of people want to play with art but don’t know where to start. We saw a lot people want to draw but too shy to draw the first line. So we want to build this machine to facilitate people drawing something.
So we draw the prototype of it. It mainly contains 3 parts.
- core part: linkage and pen - acrylic
- brace/support - wood
- control panel
Testing using wood.
To reduce friction, use acrylic. Laser cut it. But when drill holes on it, it cracks. So I laser cut the hole accurately.
Then we found if we use a servo motor to rotate linkages, then use a DC motor to rotate the linkage with servo, the wires would mixed up. So we decided to rotate the plate instead.
We drill a wood to mount motor, and laser cut a plate.
Since the DC motor rotates too fast, we bought a controller in Tinkersphere to reduce the speed without losing power.
Because different pens have different heights, we decide to make it adjustable.
At first we thought it should be 4 pillars. But we ends up using only one.
Use a driller to twist wires together.
And solder wires to meet our needs. And found out OMG I am so good at soldering :P
Then grab a box from junk shelf, and turn it inside out. And put two potentiometers and arduino board in side.
Sam build two wood piece in replace of the ungly button.