Dramatic failure of calibration print

Question

I printed out this calibration shape from Thingiverse with an unexpectedly catastrophic failure. It looks like there are a lot of things wrong here.

I used the Normal profile in Ultimaker Cura.

There's so much bad in this print that I'm not sure where to start.

1. It appears that walls weren't printed at all.
2. Resolution is way below par.
3. Overhangs are collapsing (not sure if that would be expected at those angles)
4. The in-filling is inconsistent and "blobby".

Answer 1

The failure you are faicing is underextrusion. Underextrusion can have several reasons. Among the three most common I encountered in my printers:

• The nozzle could be clogged, hindering flow (Very crushy, squishy prints after it worked fine before)
  • Dissemble the filament path till you can push an acupuncture needle through the hotend, heat it, press out all filament, reassemble.
• The extruder might be skipping steps or shredding filament
  • check if it is just not gripping the filament, not turning at all or clicking.
  • real Troubleshooting might be needed
• The g-code might have a bad setup for the filament you are using - try upping the higher extrusion multiplier/flow rate and print at least 2 walls!
  • In Ultimaker Cura: Custom > Material > Flow

• If not there yet: Gear > Material > hook Flow

Answer 2

The best thing that you can do first is find out whether you extrude the correct amount of filament before trying all sorts of things. You clearly have an under-extrusion problem. Please look into question: "How do I calibrate the extruder of my printer?".

The reason why you aren't extruding can be found in e.g. this answer. Note that the list in the answer excludes the stepper driver. If the current is too low, the torque is too low to push the filament (see this similar answer for stepper torque).

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Side note:
Note that a properly setup extruder never has a need to adjust the flow unless the extruder is calibrated for 1.75 mm filament and the used filament is of different diameter.