Recitation 4 Drawing Machines- Rahmon Chapoteau (Leon)

Materials

For Steps 1 and 2

  • 1 * 42STH33-0404AC stepper motor
  • 1 * SN754410NE ic chip
  • 1 * power jack
  • 1 * 12 VDC power supply
  • 1 * Arduino kit and its contents

For Step 3

  • 2 * Laser-cut short arms
  • 2 * Laser-cut long arms
  • 1* Laser-cut motor holder
  • 2 * 3D printed motor coupling
  • 5 * Paper Fasteners
  • 1 * Pen that fits the laser-cut mechanisms
  • Paper

 

Documentation, Steps 1-3

 

Step 1: Build the Circuit

We had to build this circuit that would control a motor:

 

Putting together this circuit was not too difficult. Here is a video of it working:

 

Step 2: Control rotation with Potentiometer

I forgot how to connect the potentiometer to the arduino and how it worked, so I had to ask a professor about this. I was also a little confused about the code. Here is a video:

 

 

Step 3: Build a Drawing Machine

 

Here is a picture of the drawing machine we made!

 

 

Question 1:

What kind of machines would you be interested in building?Add a reflection about the use of actuators, the digital manipulation of art, and the creative process to your blog post.

I am really interested in creating an autonomous goalie that slides along the post and blocks shots that are within the area inside of the goal. I would most likely need to use infrared sensor to sense where the ball is and for where the motor and “goalie”/robotic arm to move. I would need a motor and wheels attached  to have the goalie move along the goal post. I might also need a servo if I want more “precise” coordinates of where and how the arm should block the ball. Here is a prototype drawing of the machine I’m interested in building:

 

 

 

Question 2:

Choose an art installation mentioned in the reading ART + Science NOW, Stephen Wilson (Kinetics chapter). Post your thoughts about it and make a comparison with the work you did during this recitation. How do you think that the artist selected those specific actuators for his project?

The exoskeleton art installation is very interesting. I have been interested in the exoskeleton concept for a while, and watched some videos of military personnel using exoskeletons to lift up very heavy objects. Overall, I think that it is really cool, and we will be seeing it a lot more often in the near future, being used for many things like helping paraplegics walk. For a comparison, both the recitation project and the exoskeleton seem to be “energy efficient”; for example, all I had to do to draw many lines on paper was to turn the potentiometer. Most of the weight would be on  the exoskeleton, and would make it easier for a human to pick up something heavy. For their choice of actuators, the artists most likely had to find a way to let the human easily heavy items and run at extreme speeds without the human feeling like s/he is carrying a lot of heavy things. To do this, the first step they took was probably to make sure that people could comfortably operate the exoskeleton, without it being super heavy, and find a way to distribute the weight of the heavy object within the exoskeleton. The pistons would help “replace” the energy the human would use with his hand to carry; the piston would carry the heavy object instead of the human hand.

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