Issue with dual extrusion in cura

[PhatPrints 0]

Hello,

I have a BIBO 2 dual extrusion 3D printer, with abs in the second extruder. When printing from the first extruder everything works fine, but when i try to print with the second extruder filament is not extruded at all, the nozzle just follows a path and no plastic comes out. The preview in Cura looks fine. I managed to get it to print normally with the second extruder using Ideamaker, though i would rather use Cura. Any ideas?

[gr5 2,229]

ABS is damn tricky to print.  One of many reasons that it is not a popular material (weaker layer bonding, clogs easily, smells horrible, corners warp off print surface).  I recommend not using ABS as there are better materials.

 

Anyway, worry about temperature.  Could it be that the second nozzle is heating up to the wrong temperature?  You want around 240-245C for ABS.

 

Another possibility is that it is heating to 240C and staying there while printing on the left nozzle.  240C for 10 minutes will bake ABS into a gummy clog that can not be removed easily!  It can only be removed by manual labor and tools.  Even 2 minutes at 250C is sometimes enough to get a clog started.  You never want the ABS nozzle at printing temperatures unless it is actually printing and you want to do thicker layers with ABS (none of this 0.06mm layer crap for ABS) such that the material doesn't stay in the hot nozzle for very long.

 

You can look the gcodes to see what is going on regarding temperature of the right nozzle.