Tnx for the reply,
I use USB and Repetier host as the host . Computer wasn't busy at any time of the print, and I didn't do anything on it during the entire print time?
Can you tell me a better way to calibrate extruder
I use 0.4mm J head
my E_steps was 90.95 at the time of above print
I followed some videos
First measured 120 mm in filament extruded 100 mm
I didn't get 100mm only 95-96mm
recalculated Esteps to 98.02 to 100mm
Printed a single perimeter object
choose default extrusion width as 0.67
got 0.71 at the printed output
so extrusion multiplier (0.67*1)/0.71 =0.94
but with 98.0 E_steps and 0.94 extrusion multiplier my test print was clearly over extruding
it sure does look like a hardware issue. Maybe the way supports are printed triggers the hardware problem. My first idea would be the belts too, but you've checked that already.
How do you print? Via USB or local with an sd card? Maybe the .gcode is corrupted or the host produces errors during a print (bad RAM or something like that).
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