Can someone please review the picture and tell me things to try to fix, the threads are full of little gaps. The layers that are solid, below the threads have a tiny bit of space between them. Is it underextrusion, or a clog? The bottom layer seems good. Also I have taken a picture of grooves on the filament after the extruder. Is the the groove from the extruder normal?enter image description hereenter image description here


1 Answer 1


The grooves (notches, more accurately) are acceptable and indicate that your hobbed gear has a good grip on the filament.

Many factors will cause your probably-correct diagnosis of under-extrusion. If you are confident that your extrusion settings are correct, you could have this problem from under-temperature on the nozzle.

One method to assess this is to increase the nozzle temperature by five degrees C and examine a test print. If the gaps are reduced but do not disappear, consider an additional step or two of five degrees.

If you are so inclined, locate one of the many temperature tower models and modify them accordingly for your printer. This will give you a good range of temperatures for best results.

Also note that different filaments will have different temperatures and the temperatures will vary between colors from the same manufacturer and between different manufacturers.

  • $\begingroup$ I have been using the same pla when I got the printer almost a year ago. I have switched slicers from cura to ideamaker since in the model view of cura, holes were shown in the model. It seems like only fine details are really affected. Is it possible that the nozzle is slightly clogged? $\endgroup$ Apr 18, 2020 at 2:24
  • $\begingroup$ @NickSantitoro Maybe you should add print settings to you question, that may help in the analysis. Also, if you think that Cura is creating holes in the model view, this might be worth another question! $\endgroup$
    – 0scar
    Apr 18, 2020 at 6:05
  • $\begingroup$ After doing some more research I have found out that as pla gets older it may require a higher temperature because of the moisture it absorbs. I have always used the same slicer settings, so hopefully this will solve the problem. I have also changed the extrusion width from .4 to .48. This may also help. $\endgroup$ Apr 18, 2020 at 17:10
  • $\begingroup$ If moisture may be a problem here, you can bake it in the oven at a very low temperature (research the numbers) or use a cheap food dehydrator to push it out over a couple of days. $\endgroup$
    – fred_dot_u
    Apr 18, 2020 at 18:35

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