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Post 2 - Installing OpenCV - Prerequisites
Post 5 - Installing eye tracker
Post 7 - SPI communication in Python
EyePrints - Post 8 - Getting started with Kinetis
EyePrints - Post 9 - Mechanical design
EyePrints - Post 10 - Mechanical design: the plotter
EyePrints - Post 11 - Eye tracker software
EyePrints - Post 12 - Getting started with the kit
EyePrints - Post 13 - KDS Project
Here are some pictures of the building of the drawing board
The motor housing
Motor are fixed to an L-shaped aluminum bar. The top cover of the motor has three screw holes. Using a sheet of paper, I noted down the positions of such holes and drilled down in the bar
I built an adapter to mate the 5-mm motor shaft to the threaded rod. This has been made from an aluminum cylinder and drilled.
On one side, the adapter has been internally threaded
The L-shaped bar will then be mounted on the top side of the drawing board
Cursor bar
The cursor moves along a 5 mm threaded rod. The diameter is identical to the diameter of the motor shaft, so that it has been easy to mate the motor and the threaded rod by means of the above-mentioned adapter. The threaded rods are housed in a U-shaped aluminum bar. The bar has a 10x10 mm section, so that a bolt can slide perfectly. At the top and at the bottom of the U-shaper bar, two M6 bolts keep the threaded rod in place. Internally, these bolts have a coating made with Teflon tape to reduce
At each end, two switches are installed. These switches are continuously monitored to stop motors when bar limits are reached
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