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Extruder calibration ?

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Hi I am presuming that with a new printer there is no need. But after several years I did recalibrate. I noticed that dimensional accuracy on x/y axes had deteriorated and yes, as a mechanical machine gets older things wear so not surprising.

 

I do not have a UM but I guess the process is the same. You will find the e-step parameters in the firmware and need to change those. It is a bit suck and see until you get there. Print a straight line, say 50mm, and measure it. This will give you a % error. Change the e-steps and reprint. Repeat until it is spot on and then repeat along the other axis.

 

That is one way of doing it but lol my memory just clicked in and I did it a different way. Instead of printing I just moved the print head 50mm, using my Repetier Host print control software, and measured the distance by marking the nozzle position on a sheet of paper, before and after the print head move. Now this is faster but not easy to get accurate - just the width of the pencil line --> edit

 

marking the position

 

is enough to make it wrong and where you mark the paper against the nozzle, which is >.4mm,can be different on the two markings. But take it carefully and it should be good. And then print a line to get verification.

Edited by yellowshark

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