I have an Ender 3 Pro and I am trying to print a fairly delicate model of a low-polygon chicken as a Christmas ornament.
My slicer is Cura 4.11.0. I have successfully printed a dozen of them with 0.2 mm layer height but the legs break off super easily. As soon as I increase the quality to 0.16 mm and/or change the wall thickness to 5 (to cause complete infill in the legs) the extruder crashes into the print about 80 % through, every time (n=6). I tried changing these settings (while also troubleshooting globbing/stringing):
- Combing Mode:
- Z Hop When Retracted:
- Max Comb Distance With No Retract: 30 to 10.0 mm per this post
- Build Plate Adhesion Type:
brim(less resistant to falling over)
- Printing Temperature: 200 to 190 °C
- Print Speed: 50 to 30 mm/s
- Outer Wall Wipe Distance: 0.0 to 0.1 mm
I've tried three materials, all 1.75 mm PLA:
- 325(1000G) Silk silver blue 111932
- Silk 335M(1KG) Silver 111858
- Eryone Marble
The first two generic materials are pretty crap. The gooping and stringing didn't occur nearly as much with the Eryone Marble. But that issue aside, the extruder keeps crashing into the print. The brim and increased wall thickness resist the collisions but eventually, the force is great enough that the print breaks:
I'm just not sure what else to do. I've never had this issue before on any other model I've printed. I used a level to ensure the bed is flat. I'm using a glass bed with great adhesion (clearly; the model breaks before it comes off the bed.) Instead of the Z-stop, I'm using the BLTouch, which samples 16 points before every print.
I thought that maybe moisture trapped in the material might be slightly increasing layer height with each layer, causing the print to fail after the same number of layers each time late in the print with a low layer height, but succeeding with a higher layer height. However, the ambient air temperature is 17 °C and the relative humidity is 44 %, not particularly high. Furthermore, different materials of different ages stored in the same location have the same failure. I don't have a dehydrator to be totally sure, though. I've been wanting to build one so this may be a good excuse. But any other advice or suggestions would be immensely appreciated!