I have a HE3D Prusa XI3 Specs are linked here. Its came with a MK8 Extruder, and I ordered the 0.3mm nozzle with it. I have Repetier v.91 loaded onto the printer right now, and Repetier-Host v1.5.4 on my computer. I have been able to print the test object that came on the SD with ok quality but when I switch to using the computer it just doesn't work at all. It starts up and heats the bed and extruder then zeros out the axis. After coming to temp which I set to 192c for the PLA plastic and bed temp of 60-65c it tries to print. Now comes my problem. It acts as if not enough plastic is being extruded. It doesn't even get the first layer down then when the second layer comes up I notice that there is plastic balling up at the end of the nozzle. So I decided that I should must with the settings in Repetier-Host to see what I could come up with. In printer settings I got everything set up besides the Max Volume Per Sec. How do I figure this number out? I also messed with the settings in slic3r to see if that helped but I didn't notice any difference. I am also using 1.75mm PLA If that might be needed.

  • $\begingroup$ So you say that XYZ works fine but E is not right? $\endgroup$ Apr 2, 2016 at 7:39
  • $\begingroup$ Yes it seems that way anyway. $\endgroup$ Apr 2, 2016 at 9:07
  • $\begingroup$ I have been messing around with the settings and got the first layer to print but when I goes to do the second it stops again. I since have read up on the slic3r manual and it cleared some things up for me. $\endgroup$ Apr 2, 2016 at 9:10
  • $\begingroup$ Update on this thread. I have been messing around with some stuff and got the Gcode file off the SD card and looked at it. From what I can tell its trying to print way too fast compared to the Gcode for the test file on the SD card. I'm going to mess around with the settings and see if I cant figure this out. $\endgroup$ Apr 2, 2016 at 15:42
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    $\begingroup$ I do not have anything to add on if this is a software issue, but have you considered that the printing plate may be too far from the extruder? To me that would seem to explain the 'balling' of the filament at the end of the extruder. $\endgroup$ Jun 13, 2016 at 22:51

1 Answer 1


In order to try a short answer even though you already found a change to Cura helped the issue. With that additional info we can conclude that your printer per se is working fine. To me, if the plastic is curling up to a ball, it seems that you are either having

  • a wrong temperature set
  • wrongly calculated e-steps, volume calculation (filament diameter) or multiplier in the firmware
  • additional first layer parameters are off (height, offset, extrusion)

You can try to set the extrusion multiplier just to test if it is a simple miscalculation.


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