Quote Originally Posted by old man emu View Post
1. If the extruder temperature is controlled by the firmware, is there really a need for a cooling fan over the extruder?
I've been curious about this myself. I assumed the cooling fan was needed to keep the rest of the extruder assembly (above the hotend) from heat soaking during a print which could potentially cause problems but if that assumption is wrong I can't see why the extruder needs active cooling.