I'm back with some news !

The extruder was guilty ! He asked to much current from the driver and sometimes, he lost some steps !

I fixed the original Velleman extruder and mount it, the printed part are less accurate (wrong setup, I guess) but there is no lack of plastic !

To help the driver to evacuate the energy, I glue with epoxy a heatsink with a thermic pad.

Besides, I find something strange in setup for Velleman extruder, the extrusion multiplier is to 1.15 and with 600step per mm, I don't extruder the right amount of plastic. I guess the 1.15 factor is here to correct the step per mm and extrude the right amount of wire but... why not enter the right number of step per mm ??


Thank you for your help guys !