Ender-2 Quiet 50mm Hotend and part cooler

thingiverse

Design Goals: Quiet It Down! Better Performance, Less Noise Same or Slightly Better Hotend Cooling Low Weight for Easy Handling Easy Access to Nozzle for Smooth Prints Good Visibility of Nozzle for Quick Checks Easy Removal of Part Cooler for Maintenance Design Choices: 50x50x15mm Axial Fans for Optimal Cooling Pressure Boosters for Improved Airflow Adjustable Fan Speed for Same or Better Performance Big Opening for Part Cooler for Maximum Airflow Result: Noise Reduced by 11dB! Same Hotend Cooling Performance as Original (Measured at Upper and Lower Hotend Grub Screw) Weight without Part Cooler Reduced from 62g to 49g (-13g) Weight with Part Cooler Increased from 62g to 49g+43g (+30g) Parts: Gelid 5 (50x50x15) Fans, 2pcs (Spec: 12.9CFM/4000rpm@12v) Resistor Hotend, 36ohm, 1pc (I Used 2x18ohm) JST XH 2.5-2 Connectors, 2pcs (For Connecting Fans to Motherboard) Note on Voltage: PSU: 12.32v MB Header HE: 11.48v MB Header PC: 11.42v Note on Material: HC: PLA/ABS/PTG PC: (PLA)/ABS/PTG PC in PLA Will Deform If Not Cooled from the Inside, So PLA Is Okay for Printing Only in PLA. Actual Voltage at HE Fan with 2x18ohm Was 8.6v and Speed 3630rpm Pressure Booster on HE Increases Airflow ~8% Pressure Booster on PC Increases Airflow ~67% Note on Fans: Replacing Original HE Fan with NF-A4x10 FLX is Not a Good Idea. Original Fan, 40x40x10, 7400rpm (12v), Measured Open Air (Old Fan). NF-A4x10 FLX, 4500rpm (12v), Spec. FLX @4500rpm Can't Have the Same Air Flow/Pressure as Original Fan. Spire 50x50x15, 4800rpm@12v, Did Not Work Well. Rattling Noise When Mounted on X-Axis (Bearings Can't Handle Vibrations from X Stepper Motor). Strange Sound When Controlled with PWM as Part Cooler. Gelid 5 (50x50x15) Worked Fine. Start Duty Cycle ~20%. Obs! Plus and Minus on JST XH 2.5 for Fan is Opposite Compared to Battery Cables **Update:** One Tiny Screw and Four Hooks Isn't Enough to Hold Hotend Cooler Securely, So I Will Change Design Sometime in the Future. I Still Use It with Some Hot Glue. The Change Is on My Low Priority List Since No One Else Is Using It.