Da Hero v2 for Ender 3

thingiverse

# Design The Hero Me Fanduct has been remixed to meet these goals: * Stronger mounting of the fanducts * Enable use of M3 socket head screws * Using dual 5015 blower fans # Updates * **Compatible with direct drive conversion kits**. I bought a cheap generic one and could mount this without any changes to the model. * **v2**: Improved stability and tolerances * Da Duct v2: A bit more clearance so the fans slide in easier * Da Touch Mount v2: The old version broke at the mounting screws since there was only one layer holding everything together. The mount is also higher to allow mounting the BLTouch with the included springs. * Da Base v2: Compatibility to the new Touch Mount. You can simply cut the standoff from the old one and use it with the new Touch mount. # Required components * 40mm 24V hot end fan. Usually larger fans tend to be quieter so I use a 4020 fan. * Two 5015 12V fans. * The 3D printed parts. * Four M3x12 screws to mount the fan ducts, I use the socket button head screws from the original hot end fan. 12mm length is the maximum, shorter screws will work too. * **v2 only**: Two m3x12 screws to mount the whole assembly since DaTouch Mount is thicker. * Four M3x22 screws for the hot end fan. My fan is 20mm thick, the length should be max 5mm longer than the fans thickness. * (Recommended) Six M3 washers for spreading the pressure over Da BLTouch mount and the fan duct mounts * (Optional) Two m3x22 screws with nuts and washers to secure the fans # Assembly 1. Cut the threads into the base. This will be almost impossible on the printer. 2. Mount the fan ducts on the base, don't tighten the screws completely yet. 3. Attach the base to the printer with the help of the sensor mount. **v2** replace the original screws with two m3x12. 4. Align the fan ducts with the nozzle. They should be approximately 1mm above the nozzle. Tighten the screws. 5. Attach the fans. 6. (Optional) Secure the blower fans. For me, the fit of the fan ducts is tight enough. 7. (Optional) Attach the BLTouch using the included springs (v2) and screws. If you do not have any springs, use the old mount which should have the correct height. I insert the screw with the washers from below the sensor. Then place the springs on the screws between the sensor and the mount. Finally, the nuts go on top. # Probe Offset For my probe, I measured the following offsets (X Y Z and mm) and added them to Marlin: ``` // Specify a Probe position as { X, Y, Z } #define NOZZLE_TO_PROBE_OFFSET { -55, -12, -2.75 } ``` # Dual 12V 5015 part cooling fan I have not found a good 24V 5015 fan so I decided to use two 12V 5015 fans. I connect them in series so the voltage should be split into 12V. Moreover this allows running the fans at a lower power level of 35% which is much quieter. I would not recommend running the fans at more than 50% as this would be too much airflow and cooling. # Not Compatible with original Hero Me Even though the dimensions closely resemble the original design, it is not compatible because of two reasons: 1. The mounting brackets are stronger so the original fan ducts won't fit. 2. The fan ducts are further away from the center so the sensor mounts will likely collide with the fans