The large scale drawing robot project continues… Currently we’re aiming for about 10m wide drawings, moving about 50cm per second.
It’s been an interesting journey with lots of opportunity for learning, including:
- long distance communications over RS485
- unit testing microcontroller functionality
- trapezoidal trajectory planning
- servo design and loop tuning
- visualisation
Here’s a photo showing how the quality of movement progressed with PID loop tuning:
Allowing us to start drawing some nice vectors:
After finding out about bokeh, I also finally did a decent visualisation of how different errors affect the drawings:
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