This project is inspired by "Accuracy of a print head sensor in a DIY linear drive" experiment video of HomoFaciens from youtube.
The point is to find out how precise a cheap, fully diy linear motor can be.
The test platform, presented on the second picture, is based on:
* arduino mega,
* h bridge driver
* simple DC motor with an 8 mm threaded rod attached
* a movable platform mounted on two drawer slides coupled to the thread with a nut
The encoder will be constructed using a transparent foil with a pattern printed at home laser printer. Active elements are going to be IR LEDs.
A test pattern used to find out thin pattern your printer is able to produce. Each line contains a set of white and black bars of width in pixels specified by the number on the left. Print without borders with 600dpi resolution.