Macro's - Repository?
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@alex-cr that's great. I will definitely be checking that out.
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@Phaedrux I hope it's not too rough. My old engineering professors and current coworkers would kill me for not labeling all the axis...
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Thanks! I used gnuplot, which is able to fit any curve, and successfully computes A and B. Here is how I did:
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extrude 50mm (for example) at different speeds and read the real extrusion length;
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build a table with 2 cols: first col = speed, second col = error from theorical extrusion / theorical extrusion. You need to revert the sign so the table contains the correction to retreive the correct extrusion;
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save this table in a file called 'extrusion.dat';
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in gnuplot, do:
A = 1
B = 1
f(x) = A * X + B * x * x
fit f(x) 'extrusion.dat' via A, B <<<<< will print A and B and errors
plot 'extrusion.data'
replot f(x)Hope this helps.
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