I have been having some 1st layer ABS issues on my new Taz 4. To help identify the problem i’ve attached a photo to this post as well.
From what i can tell the layers go down smooth until the nozzle reverses direction. When it pauses momentarily to reverse (despite the extruder momentarily reversing to prevent oozing) it continues to flow causing ABS to bunch up at every point the nozzle reverses direction.
Thus far I have tried:
-Adjusting my extrusion temperature up and down from 230 C +/-15 (No effect)
-Changing my slicer to extrude a thinner first layer (Changed first layer extrusion width with no effect although holes are more accurately created)
-Raising nozzle further from bed (Resulted in poor adhesion) (Closer to the bed problem becomes worse and it drags along glass)
-Verified my extrusion amount (Set slicer to extrude 100mm and 100mm is extruded)
-Adjusted my extrusion multiplier so that extruded walls measure to be exactly as indicated in the G-code.
From the picture i don’t believe the bed is not leveled because if it was not level at some locations the outer perimeters would have been messed up. However i could be wrong in this assumption.
I have not modified my print speed substantially due to the fact that i believe slower would significantly increase the issue?
If i design a print file where the nozzle makes 0 direction reversals I have a clean print.
Overall if i let the problem continue and it doesn’t tear itself apart during the 1st layer, on subsequent passes the nozzle would ram the built up material and obviously this is not an intended function of a normal print.
Any assistance with the problem would be greatly appreciated and thank you in advance to everybody for taking time to help.