While most of my large scale prints are good, I’m having difficulty with distortion and incomplete fill on small parts. In the examples shown, the problem areas are about 18mm (square and round). As you can see, the hole (6mm in diameter) and the rectangular slot are grossly distorted and the fill is incomplete near the holes.
I am printing with 3mm ABS. Some of the key parameters are:
Layer height .25
Extrusion multi[per 1.0
Extrusion width .35 (1.4 times layer height)
Print temperature (Normally 230, tried 220 with same results)
Fill Density 1.0 (Tried values from .4 and up)
Print speeds are slow (perimeters 30 mm/sec, infill 60mm/sec).
I am wondering if I need a fan? All suggestions will be appreciated. Thanks.