Update README.md

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Mike Abbott 2023-04-29 13:09:20 -06:00
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Do you hate manually tuning pressure advance? Me too! This script can use a line laser and camera that are attached to your printer's toolhead to generated a 3D model of a pressure advance calibration pattern, and estimate how badly each line is deformed. We can pick the best one, and use this as our pressure advance value.
![Printer with the system installed](graphics/COV_6803.jpg)
*The system installed on my printer*
![Calibration pattern compared with the control and results](graphics/calibration_control_calibrated.png)
*On the left is the pattern that was scanned. The middle pattern shows the pattern printed with pressure advance disabled, and the pattern on the right shows a pattern printed with the calibrated value.*
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Here are some heightmaps from lines that I scanned while working on this project. They're a little bit squished together because the columns actually represent video frames, and not pixels or millimeters.
![0.13 line](graphics/2_0.013_color.png)
*PA at 0.13*
![0.33 line](graphics/5_0.033_color.png)
*PA at 0.33*
![0.60 line](graphics/9_0.060_color.png)
*PA at 0.60*
![0.33 line 3D](graphics/5_0.033_3d.png)
*Here's what the 0.33 line looks like in 3D*
# Results