I did aome findings about what happens without knowing what was really happening on the Bowden at that time.
https://ultimaker.com/en/community/19330-esteps-and-ultimaker-o-and-the-magic-missing-10
Clearly the filament also, apart of friction, flexes like a spring.
That's why when I calibrate my 1.75 feeders I * the feeder math supposed real number by 1.055. For 2.85 the number is almost a flat 10%
Hi neotko,
Yes, I've been reading your posting about this issue with interest and compared it with the "MK8 experiment" i did sometimes ago. I’ve had to do the "reverse" engineering on the requested number of e-step for the UM2 in order to find this "theoretical diameter". So the effective diameter for the 8 mm knurled feeder wheel found using this approach appear to be approx. 7.2 mm(?). I'll think you are right in that the feeder is compressed and build/accumulate up pressure by making a sort of S pattern inside the bowden tube.
Torgeir.
(Right now down Sout in Spain. )
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Torgeir 259
Hi rigs,
This is great info, thanks.![:)](//content.invisioncic.com/ultimake/emoticons/5a33abdf6d109_1f60acopy.png)
Regards
Torgeir.
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