Collapsed vertical corners at 0.1mm layer

Hi everyone,

I have just built a Mendel90 (awesome piece of equipment) and now I'm learning how to achieve the best results with it. Perhaps you'll know what causes this issue I'm having -- attached is a picture of a 10mm cube printed with 0.1mm layers; all of its corners are collapsed. I'm seeing a similar effect on the seam corner of a cube printed at 0.3mm, hard to say if it's related though.

Any ideas? A quick search taught me a lot about raised corners, not much about collapsed ones though.

It looks like you're under-extruding the and the tension in the filament is dragging your corners back toward the center. This may also happen if your extrusion width is lower than your nozzle diameter. You want your filament squeezed out and smooshed down, not dragged along.

If this is PLA, I'd also suggest directing a cooling fan at the print.

Might be the case -- I had limited the extruder feed rate based on how well the 100% infill 0.3mm layer cube turned out and the value I got was quite lower than what I got earlier with the standard "extrude 100mm of filament and check how much was actually fed" calibration method. I'll try increasing E_STEPS_PER_MM and see if it makes it better. Thanks!

Oh, and it's ABS -- forgot to mention that, sorry.

Been having the same issue. Going to look at this and see if I can fix it!

---

Ryan
Quality Engineer & Hobbyist
thingsandtrains.blogspot.com