Titan Aero Extruder With Probe Mount for Lulzbot Taz 6 by jaln

Last crawled date: 3 years, 1 month ago

The files here will work for an E3D Titan Aero 1.75mm or 3.0mm Standard (RH) on a Lulzbot Taz 6 or 5, etc. Ignore the "1.75" in the stl file names. It's just that the version I built is for 1.75mm so I could consolidate my filament size. I have built both 0.50mm and 0.40mm nozzle versions which both work great, and are a significant improvement over the stock AO Hex extruder that my Taz 6 originally came with. If you have reasonable skills this is not too hard, but requires soldering, crimping and good printing skill. If you don't have those, $250 for a 3.0mm version (without an inductive probe) purchased from Lulzbot or ItWorks3D is not a bad price for a job that entails considerable time to complete. The Titan Aero was ordered from Filastruder.
I also modified my firmware to 1.1.8.62 Marlin from the AO Marlin repository. I can include the version changes for the 1.75 version if someone asks. Don't have enough time right now...
You will also see here that I have added a magnetic plate bed from my Taz 5 bed conversion. See https://www.thingiverse.com/thing:2836555. This is pretty much the same except for the corner adapters for the phenolic and steel plates.
There are two lower air duct designs. One is for a 12mm NO NPN probe and the other is for an 8mm version. Both work fine, but after trying both, I went with the 12mm version because I like the extra 2mm of space above the bed. The 8mm looks cooler and is lighter.
Later I will post instructions to add the probe to the Taz 6. I only use a single IN4001 diode to allow using 24V with the probe and not blow out the 5V signal input on the Rambo.
I used the cheap 3mm brass inserts from Uxcell on Amazon. I have a tip I use with my Hakko soldering iron, but you can use a 3mm screw with a hot iron as well.
Will post a parts list later.
Video: https://www.youtube.com/watch?v=PKN-m4CiRlI
I will post a video showing it in use, and how to modify the T6 for the probe, etc.
You of course risk bricking your Taz if you do not know what you are doing, fiddling with the electronics and firmware. You take full responsibility for making the modifications here.
I have crashed the head a number of times, and blown a few of those overpriced Littlefuse 5VDC micro fuses. Not on this project though. BTW, Bel makes a version of that fuse for about .35$ each on Mouser.
I used PETg here. ABS would also work. I had trouble with the main part of the extruder mount peeling up at the lower left corner. I ended up increasing the bed temperature 10 degrees to 80C, adding a 5 ring attached brim and hairspray. The lower fan duct and probe mount should also have an attached brim to prevent the nozzle from knocking the part loose. You do not need support inside of the lower fan duct and probe mount. The angles will print without the need for support inside. You should however use support on the outside, under the probe holder, etc.
The firmware hex file I used for the 1.75mm version on my T6 and the 5 Marlin 1.1.8.62 source files I changed to accommodate the probe and bed leveling are included here. The Z axis home switch is not used. The Z home is at the middle of the bed. I may use the wiper later also, but if I do it will not be more than a couple of light wipes. I do not like the way the stock wipe jams the nozzle into the felt. You can see the extruder mount flexing when it does that. I actually had it loosen my hot end and heat block on the AO Hex hot end before I did this mod.