Drawbot: Machine / Mechanical Design 2013

1st Prototype in Action

 

 

BOM: 1st Prototype

 

Gondola

• Screwless Sharpie Holding Gondola for Drawbot

Motor Shield

• Eagle files: available from Adafruit
• Motor shield assembly instructions (Adafruit)
• Parts List: Available from Adafruit
• The pitch of the headers is different on the supplied Eagle files than the headers that are listed for the kit, we used these headers for our fabbed board.
• Assembeling the fabbed motor shield, pngs for milling

Arduino

• Arduino Uno or Duemilanove

Drawbot Software / Firmware / Wiring

• Marginally Clever Wiki

Hardware

• Two 3D printable bobbins
• Two 3D printable motor mounts
• Two Nema17 12v 0.3A stepper motors
• String or flexible fishing line
• A variety of M3 screws and wood screws
• Power supply: 12V 2A

First Prototype Assembly (as a class)

Overview / Options

Makelangelo 2

We based our drawbot off of the Makelangelo 2. It has a BOM, assembly instructions and software. It is also in active development.

• About Makelangelo 2
• Product Page with Software
• BOM / Assembly Instructions
• Design Files (thingiverse: motor mounts and bobbins)

Arduino / Barduino

We can drive this with an prefabricated Arduino or we can make our own, I think we may need one that runs at 16mhz, let's use the Barduino design.

Motor Shield

The Makelangelo 2 also uses the Adafruit motor shield, which provides the eagle files so we can fab our own. We will make 2 versions, one with the fabricated PCB from Adafruit, one with a fabbed board.

Gondola / Pen Holder

• The Makealengo 2 does not provide the files for the updated pen holder with pen up capability, so we will have to use the old one or make / modify our own.
• Or we can use UechiMike’s version for pen up: http://www.thingiverse.com/thing:28854
• Or we can design one based on these examples: Ideal qualities in a Drawbot pen holder (MakerBlock)

Drawbot Resources / Background

Anna's Collection of Drawbot Parts

Drawbot alternate gondolas and parts (Gathered from Thingiverse)

MakerBlocks Drawbot Resources

Lots of drawbot research here

Division of Labor

Gondola / Pen Holder

1. 3D printed version - Sahil & Anna (complete)
2. prototype our own - Dana (in progress)

Arduino

1. have one - Uno (fallback / testing)
2. Build our own - Lorenzo (almost complete, need diodes)

Motor Shield

1. Assemble kit - Diane (complete)
2. Make our own - Matt (complete)

Other Printed Pieces

1. 2 - bobbins: Kate (complete)
2. motor mounts (laser cut): Kaimen (complete)
3. other pieces (motor mount, pen holder) - TBD, not really needed. (complete)