>> since it is a 3DR, using printed parts, problems related to geometric of the printer are the last I would look after <<
Dont't get me wrong and please note that I'm not about to question the quality of *your* (or anyone's) parts - but in general, with printer parts that came off another hobbyist's printer with unknown calibration history and accuracy, those would actually be the *first* thing I'd look after.
For example, I found the extrusion cavity in the base parts of my own 3DR very slightly leaning to the left, so slightly that you couldn't possibly detect this by eyeballing (and just barely by using a machinist's square), but still this slight imperfection would have a noticeable effect some 400 mm upwards and perfectly explain phenomenons such as "unexplainable" Z height deviations.
Dont't get me wrong and please note that I'm not about to question the quality of *your* (or anyone's) parts - but in general, with printer parts that came off another hobbyist's printer with unknown calibration history and accuracy, those would actually be the *first* thing I'd look after.
For example, I found the extrusion cavity in the base parts of my own 3DR very slightly leaning to the left, so slightly that you couldn't possibly detect this by eyeballing (and just barely by using a machinist's square), but still this slight imperfection would have a noticeable effect some 400 mm upwards and perfectly explain phenomenons such as "unexplainable" Z height deviations.
