Prusa i3 Bowden Extruder + Inductive Proximity Sensor + Radial Fan

thingiverse

This is a simple proximity sensor mount add-on to the already great bowden hotend mount designed by Tech2c: http://www.thingiverse.com/thing:547706. I loved his design and couldn't find anything similar with a proximity mount, so I added my own as well as a radial fan mount with bi-directional fan duct. I have been printing with this for at least a hundred hours with great results! This is installed and used on my Prusa i3 Wilson ts by mrice. Love the printer and would recommend it to anyone looking to build a prusa i3 variant:http://www.thingiverse.com/thing:255605 The hotend I am using is a E3D V6 Jhead Hotend 1.75mm .4MM Nozzle Extrude http://r.ebay.com/gWXg4k off of eBay, and it's probably a Chinese knockoff. The radial fan duct I used by ffleurey: http://www.thingiverse.com/thing:151555 directs the air flow on two sides of the print with one fan. I don't like having any unnecessary weight added to the carriage. For those that don't know, "Inductive" proximity sensors only sense metals aka aluminum beds! I print directly to an aluminum heated bed sprayed with aqua net extra super hold. my prints stick very well, although I do miss printing directly on glass. I highly recommend watching this video about installing and wiring the proximity sensor. I also recommend watching Tom's other videos about 3d printing which are very informative: https://www.youtube.com/watch?v=EcGFLwj0pnA UPDATE 6/11/15 : V2 I moved the fan mount arm slightly to correct the hole alignment with the fan. I haven't printed it yet because I am using the first version which works with the aid of a zip tie instead of a screw. Additional info: Sensor Type: LJ12A3-4-Z/BX Inductive Proximity Sensor Switch NPN Ebay has them for under $5. The hole for the prox sensor is 12 mm. The hardest thing to print is the radial fan duct. Print it separately in case it fails. It's a small print with thin walls and heavy bridging so make sure your printer is up to the task. Then simply glue it to the fan. All of the parts are printed in PLA. I have not had any issues of warping when printing with high temp materials. I have printed Nylon and ABS no problem. If you have any questions just shoot me a message! Printed with: PLA 1.75mm 0.2mm layer height 40% infill 50mm/s print speed no supports or rafts Printer Brand: RepRap Printer: wilson ts prusa i3 Rafts: Doesn't Matter Supports: Doesn't Matter Resolution: 0.2 Infill: 40% Notes: The Radial fan duct is the most difficult part to print. Make sure your printer is up to par in terms of bridging. I have printed a few of them, all without supports. You may have better luck with supports but i haven't tried yet. I also recommend printing the fan duct on its own so if it fails it wont affect other parts being printed. All other parts print without any issues. Good Luck and happy printing!