Processing is challenging.  For best results, a heated bed is required to control warpage and improve layer adhesion.  Cross-sectional area should be minimized.

•  1.75 mm 
• 500g is on a 8" diameter spool

PC-ABS is moisture sensitive. Even when stored in a bag with desiccant, drying in an oven for ~ 1hr at 85C-95C may be required for bubble free high strength prints.

In our experience, good results are achieved when printing small parts at 270-290C on a heated bed. For larger prints with good layer adhesion and minimal distortion, an enclosure is ideal.