75mm Wide Nozzle Spacing

thingiverse

To increase printing space on my printer's X axis, I designed a new aluminum extruder block that positions nozzles 75mm apart. This allows me to utilize the entire area of my extended heat-break plate (XL HBP) from Thingiverse. With Sailfish firmware's ditto function, I can print eight rows of 37.5mm wide objects or four rows of 75mm wide items. For wider prints, adjust home offset in the firmware, set X toolhead offset to 75 and modify start G-code to prevent collisions. Additionally, reverse the direction of the left extruder as it's now a right-handed pair. Using a local metal supplier, I sourced 5/8" square aluminum bar stock, cut it to 114mm length, and used the original Replicator bar to mark holes for extruders, nozzles, and mounting screws in the same positions. A center mark 75mm left of the right nozzle hole helped in placing the left nozzle and two mounting holes. Assemble the hot ends and check for level between both nozzles. Attach the provided XL Filament Guide and Airflow Dam, and set up a right-handed plunger or roller bearing for the left extruder. Use my OpenSCAD file to customize the design for your parts. The air dam was added due to excess airflow through the center opening. I reused guide tube keepers from the original plate. Find more details and updates at my Thingiverse page.