Printables-754877_Calculator

	A	B	C	D	E
1	Last Update	21 Sep 2024. Support for Bambu skew correction with M1005.
2	https://www.printables.com/model/754877
3	Instructions: File>Make a Copy. Slice the 100, 120 or 150mm model and print it. Take measurements for 1) to 6) using your best judgment and modify the orange highlighted fields only.
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6	Print nominal diameter		120		[enter 100, 120 or 150]
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8	Measurements
9		Expected	Measured	Error
10	1) X-Outer	120	119.75	-0.209%	[By design, these two should be identical. Any differrence suggests measurement error]
11	2) X-Inner	120	119.5	-0.418%
12	3) Y-Outer	120	119.6	-0.334%	[By design, these two should be identical. Any differrence suggests measurement error]
13	4) Y-Inner	120	119.45	-0.460%
14	Wall thickness error in X			0.250	[Error (mm) from possible overextrusion]
15	Wall thickness error in Y			0.150	[Error (mm) from possible overextrusion]
16	Avg wall thickness error			0.200	[Error (mm) from possible overextrusion]
17	Estimated X positional error			-0.314%	[The actual error in X that needs correction]
18	Estimated Y positional error			-0.397%	[The actual error in Y that needs correction]
19	*Wall thickness errors cause the part to be dimensionally inaccurate even if the axes have been calibrated accurately. It is the difference in printed wall/line thickness versus what your slicer thinks it is. This can be caused by caliper error, part shrinkage, uncalibrated Z steps, Flow rate, line width slicer setting appropriate for the nozzle, nozzle wear or a combination of all. These are not used in the step adjustment section but are used in the skew correction section for correcting AC and BD which are Outer-only measurements.
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21	Rotation_distance or E-steps adjustment (Klipper people use former, Marlin people use latter)
22	If print is smaller than expected, rotation_distance needs to be decreased OR e-steps/mm needs to be increased. Do not change both! Tip: If the movement errors are similar for x & y and/or both are small, you may opt to use shrinkage compensation in the slicer instead of taking the recommendations below.
23		Current	New rotation_distance	New E-steps
24	stepper_x	40	39.875	40.125
25	stepper_y	40	39.841	40.159
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27	Skew correction
28		Expected	Measured	Error Adjusted
29	5) AC	120	119.8	119.600	[Right skew, angle 0.05 degrees]
30	6) BD	120	119.6	119.400	[Right skew, angle 0.05 degrees]
31	AD	84.853		84.499	[By design is cos(45deg)*nom_diam]
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33	Klipper	From https://www.klipper3d.org/Skew_Correction.html
34	[skew_correction]
35	SET_SKEW XY=119.6,119.4,84.499
36	SKEW_PROFILE SAVE=my_skew_profile
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38	Marlin	From /Marlin/Configuration.h
39	M852 S0.00167364133936152
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41	Bambu	From https://forum.bambulab.com/t/skew-compensation-in-the-bambu-x1c-firmware/67661
42	M1005 X119.6 Y119.4
43	M500
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