Davinci 2.0 Filament Fans and Controller
Description
Howdy. Finally I am finishing a project I started several months ago. I have been staring at all these parts I purchased and printed last spring, just waiting for the cold weather to drive me back inside. After I purchased my printer I searched around for a decent fan system and while there were some cool and innovative designs out there I didn't see any that felt right for me. I wanted a compact design with the ability to fully control fan speeds. I figured a buck converter would fulfill that role. Then add on a digital display for repeatability and a three way switch so only the fan I needed would run. The fan bracket and duct need to be printed with supports. I originally printed all the parts with pla but there some issues so some were reprinted with petg, The pla fan bracket warped after being installed for a few hours, I kept having problems with the fan controller case cracking when I screwed parts in but that could have due to the awful tactink filament it was printed out of. I cut the fan wire and left 5 inches of wire on the fan end, the long section was connected in the controller with jst xh male connector that came with the fan routed to the hotend carriage. I then soldered on a female to the fan end. To power the fans I spliced into power supply and fused the hot lead. If you don't want to risk damaging your printer you could always get power from a wall wart with switch and barrel connector installed into the back of the machine.I am still debating whether I should of done it that way. I started this post a week ago when I started the build, it got postponed because I had to order some super lube to grease up my printer before I put it back to work. So if I forgot to add anything just let me know. I got a good first print and everything seemed to work well but I am sure I will be updating the build in the few months, as long as I don't get sidetracked. If you decide to wire into the power supply as I did, remember, there is always a chance of bricking your machine if you f up. So please be careful. EDIT 2/11/2020: Finally added a 360° fan duct and so far it seems to work well. I opted to put 1mm holes in the model and then I drilled out some of the holes. Th one hole opposite the intake I drilled 2mm and the 4 holes on either side 1.5 mm with the remaining 7 holes at 1mm. Hopefully this will generate equal airflow from all directions instead of dumping all the pressure at first few holes. I also added a couple models with support I generated in meshmixer. The files come up in repetier as not manifold but print fine. I tried repairing them in netfabb but then the support didnt print well. In addition to the meshmixer generated support I printed with support from build plate only turned on. These were printed in pla but probably be printed with abs or petg. I still havent used abs and the little petg I have left is being saved for another project. BOM LM2596S DC-DC 3A Adjustable Buck Converter Bourns 3590S-2-103L 10K Ohm Potentiometer Mini Green DC 0-30V LED Display Digital Voltage Voltmeter Panel For Arduino Toggle SWITCH ON/OFF/ON Heavy Duty 20A 125V SPDT 3 Terminal Car Waterproof BOOT 3pcs Brushless DC12V 5015 Cooling Blower Exhaust Fan 2-pin for 3D Printer 25dB 1x SCI R3-26 Panel Mount Chassis Fuse Holder For 5x20mm Glass Fuses 10A 250V US 40 Set JST XH Connector 2 3 4 5Pin 2.54mm Straight Angle Housing Crimps Terminal 1x SCI R3-26 Panel Mount Chassis Fuse Holder For 5x20mm Glass Fuses 10A 250V US 4 pcs F2AL Fast-Blow Fuse 2A 250V Glass Fuses 5 x 20 mm (2 amp) (F2A) Screws Controller 2 1.7x5mm self tapping Panhead Display 2 2.8x7mm self tapping Panhead Lm2596s 2 3x8mm self tapping Countersink Controller Back 4 3x15mm machine Countersink Bracket 1 3x5mm machine Countersink Bracket 9 3mm nuts Bracket Fans 4 10-24x1 1/4 machine Countersink fans 2 10-24x3/4 machine Sockethead Bracket 6 10-24 machine lock nuts
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