POLAR DRAWBOT

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Here is a rewritten version of your text: This is my redesign of mechanical components for building a wall-mounted polar drawbot. I assembled mine by gathering and integrating various information I found on the web. The electronics and firmware come from Dan Royer's "Makelangelo project" (Makelangelo software - Makelangelo firmware) using version 1 of the Adafruit motor shield, but I used a DK Electronics motor shield instead. After conducting several test trials with parts sourced from various projects, none met my desired specifications, so I completely redesigned all components. Following extensive testing, I developed three types of pulleys: one for smooth cords and two for synchronous transmission using ball chains. Three types of ball chain can be used interchangeably: a 3.2 mm all-metal chain with a pitch of 4 mm, a 4.4 mm plastic ball and cord with a pitch of 6 mm, or a 4.4 mm plastic ball and cord with a pitch of 12 mm. Remember to adjust the pulley diameter in the machine setup for optimal results. You can also modify overall dimensions such as stepper motor interaxes or drawing area at your convenience (don't forget to update the setup). I used exhausted "D" type batteries as a counterweight, designing multiple holders to accommodate them. For mechanical components, I drew inspiration from photos on Kongorilla's Flickr page https://www.flickr.com/photos/91789568@N00/. New Updates: I've posted images of my drawbot on Flickr here: https://www.flickr.com/photos/133169798@N08/sets/72157652579199386. 12/08/15 I added a video of the drawbot in action at https://youtu.be/hQ8BQ0GsLiE. In the coming month, I plan to develop an MK2 version. New Timelapse Video: https://www.youtube.com/watch?v=30_FnJPDODY Update 19/09/15 Video Assembly Instructions: https://youtu.be/bMyd1Vm-Nrk