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How does the printer compensate for precision loss do to movement? In industrial robotics, there is the concept of measuring the inprecissions in the machinery
by picadores 3y ago
How does the printer compensate for precision loss do to movement? In industrial robotics, there is the concept of measuring the inprecissions in the machinery at any given point (direct measurement) and compensate that via variables in the robotic matrice. Is there something similar for printers?
- Mashimo 3y agoI'm not sure. But in the end you are laying molten plastic on top of each other. Even with a perfect flat print surface you will have slightly uneven extrusion that will be noticeable on top down lighting. Silver cubes with direct lighting https://github.com/lord-carlos/mk3-upgrade/blob/master/assets/images/20190525T190444.jpg?raw=true https://github.com/lord-carlos/mk3-upgrade/blob/master/asset... Same cube with top down light: https://github.com/lord-carlos/mk3-upgrade/blob/master/assets/images/skele_602_silver.jpg?raw=true https://github.com/lord-carlos/mk3-upgrade/blob/master/asset... What we have is Pressure Advanced. Where we stop extruding (as much) right before a corner. And we do that by doing some test prints with different values and eye balling it. Also some firmwares like klipper have some math in it to compensate for heat expansion over time of the printers frame. Or something like that.
- numpad0 3y agoMost hobby printers do not compensate at all. There are input shaping to reduce vibration, and hacked together closed-loop upgrades, personally I haven't heard of any more sophisticated controls.