Cartesian position feedback feature
The Hangprinter has no means to measure where the effector is at any given time. Neither the user, nor the firmware, have means to confirm that the effector is at the cartesian position where we believe it is.
Computer vision tools, such as April- (or QR- any other kind of)- tags combined with an open library such as OpenCV should be enough to give us some kind of positional feedback.
Lighthouse tracking is another viable tech choice. See https://github.com/ashtuchkin/vive-diy-position-sensor Thanks Saurabh Sogi for the idea of using this for the HP!
This milestone only covers capturing such feedback and using the data as input for the auto calibration once. Any hardware allowed. Also hw not connected to Duet at all.
To be planned after this milestone:
- Documenting and standardizing cartesian position feedback feature.
- Firmware access of pos feedback during print, for Emergency pause feature.
- It's possible to map accuracy with pos feedback feature. To design that process to be both useful and feasible is work for later.