CR10/Ender 3 MicroSwiss DirectDrive Dual 40mm Part Cooling Fan Duct

thingiverse

I designed this Fan Duct after upgrading my CR10 with the MicroSwiss DirectDrive Extruder and All Metal Hotend (https://store.micro-swiss.com/collections/extruders/products/micro-swiss-direct-drive-extruder) For easy installation and access to the hotend it consists of two parts: -The main part including the part cooling ducts and backplate -The removable front adaptor It uses two 40mm Fans mounted to the sides for Part Cooling and another 40mm Fan mounted to the front adaptor for cooling the heatbreak/cooling block. All parts are connected with standard M3 screws. V1 (Original Version): All mounting holes are designed with a 2.8mm inner diameter, so screwing in standard M3 screws will easily create an M3 thread. To get the length of the screws right, roughly add the following bore hole lengths to the thickness of the used fan: Mounting holes for the part cooling fans: 5mm Mounting holes for the front fan: 15mm Additionally use M3x12 cylinderhead screws to mount the adaptor to the main part. For mounting the whole Fan Duct to the Aluminium Plate from MicroSwiss I recommend using two more M3 screws with M3 washers to better spread the force on the printed surface. V2 (With BLTouch and Dial Gauge mount): If needed, all new features of this version also use standard M3 screws, nuts and washers. Added in this version: -removable BLTouch adaptor -integrated Dial Gauge mount for manual bed leveling -cable management fixtures for use with zip-ties -better ground clearance to avoid hitting bed clips,... I also included some photos for the X- and Y-offsets between the nozzle and BLTouch and the full STEP- / F3D-Files for inspiration including the whole extrusion-assembly. As I'm currently not running a BLTouch on my CR10, the user @johnclawson pointed out in his make, that the offsets should be as follows: define NOZZLE_TO_PROBE_OFFSET {31, 18, -1.75} I also added some airflow simulation results from Fusion360 Analysis to show a possible behaviour. As of request, now there's also a v2 version of the fan duct without the dial gauge mount! That version includes two holes (which are 65mm apart and 30mm above the nozzle) at the front for your own creations! If you decide to print the fan duct please consider posting your print as a make or if you did some changes/adjustments or added your own mounts for it, share it as a remix please, so that everybody can profit from it! Cheers