Project Logs

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• Visualization

  Hari Wiguna • 01/02/2017 at 05:20 • 0 comments

  The final project will be made of translucent plastic to accommodate LED backlighting. However, I decided to invest a little time to build a foam core model. It has really helped me judge the right aesthetic size proportions.

  
  

  Note how shallow the knick-knack shelves are. This is important so the shelves would not obscure the chess men when viewing the board from above or below.

  
  
  

• String Theory

  Hari Wiguna • 07/18/2016 at 08:46 • 0 comments

  Scott, suggested that maybe strings would be simpler than rack/pinion and threaded rods. I'm considering all options. Thanks Scott!

  I have not figure out how to apply the string and pulley concept to pick up and move the chess pieces. I thought I could use threaded rod to skewer a case that holds each chessmen, but then I realized that to actually pull it off the shelf, I need yet another mechanism to slide the box in the Z direction. Grr!

  
  Scott's video:

• First Draft

  Hari Wiguna • 07/18/2016 at 04:26 • 0 comments

  Originally, I thought it would be exactly like a 3D printer with a pincher instead of hot end, but since we won't need sub-milimeter accuracy, we should be able to simplify it.

  Here's my first draft. Motors would be cheap $5 geared stepper motors from China. Driven via some h-bridge mosfet by an ESP8266.

  X axis is a rack and pinion with static rack on the top of the shelf, Y is the usual threaded rod, and Z is another rack-pinion to "scoop up" the chess piece.

  What do you think?

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