Partner: Leslie Zhao, Amber Wang, and Eric Zhang
Materials: 1 stepper motor, 1 SH75440NE ic chip, 1 5 volt power supply, 1 power plug, 1 potentiometer from your kit, 1 Arduino and USB cable from your kit, Laser-cut mechanisms, Pens that fit the laser-cut mechanisms, 1 potentiometer
In Lab 11, the task was to make a drawing machine using materials provided. Leslie and I built the circuits based on instructions online. We attached the arm to the stepper motor and jointed the Laser-cut mechanical arms together with three nails. With the code, stepper_oneRevolution example, we managed to make the stepper motor work and the mechanical arms to move. As you can see in the model, the drawing machine does not work well. It simply enables the pen to leave marks randomly.
After finishing our drawing machine, we tried to combine with the drawing machine of Amber and Eric. Since there were two mechanical arms that can control the pen, the machine now could draw some patterns.
For the third part, we used the code stepper_speedControl and a potentiometer to control the speed of the motor. This time when we combined with Amber and Eric, we used to Laser-cut mechanisms to fix the position of the stepper motors in case that the motor would move when it drew. We could also contolled the machine to draw fast or slowly. However, the speeds of two motors were different, the lines drawn could not coincide very well. The second painting looked better. Finally, we exhibited out painting on the wall of the lab.