I usually don’t come by these forums, unless I’m troubleshooting something (hi Mini 2s!) so I apologize for posting and not responding a while back. Some people asked for STLs to Dragon-based Lulzbot toolheads, and i have two: The Dragonstruder is based on Lulzbot’s M175 design:
The Orbiter Dragonstruder is new design that utilizes an Orbiter extruder:
I’ve been running the Dragonstruder on my Taz 6 for close to a year and it works a treat. Between that and the BLTouch, I am amazed at how it transformed my Taz into a printing machine. I never even bother to check if a print has successfully started anymore, as it flawlessly lays-down whatever I load in it. It simply comes correct. It’s worked so well that I haven’t even done the additional work needed to clean up cable mount points, because I just can’t justify the downtime when it has been so reliable.
In addition to tweaks to fit the Dragon and V6 heatblock, the Dragonstruder has a few upgrades from the M175, including having the mass moved quite a bit back towards the gantry, some stiffening to reduce X axis oscillation, and inclusion of a BLTouch. Note that all of these are only possible because I don’t run stock firmware. I may have a close-to-stock version from early development if anyone has interest.
The one thing I would note on this design is the 25mm fan (which is spec’d to the Lulzbot BOM) can be underpowered for higher temps using the high-flow hotend. I may revisit this in the future, but it’s only an issue if the hotend is kept at a high temp without extruding for several minutes (which is an issue with the HF Dragon in general).
The Orbiter Dragonstruder is a dropish-in upgrade to an aero mini (which is actually quite compact). It will even work on a lulzbot mini 2, as it has just enough clearance to allow for tramming (leveling) of the X gantry. (I need to tweak the fan shroud provide just a bit more clearance) It uses the same basic volumetric envelope as the aero mini while being much lighter. I’ve been running this on my Mini 2 for somthing like 6 months now, and it’s been performing extremely well. (I run a SF Dragon on this) I have made minor revisions I still need to test, but the earlier version is working extremely well without as-is. Same caveats apply about messy cables and whatnot, but Zipties.
Anyway, I always appreciate the open-cource nature of Lulzbots, so thought I would give back in kind. I consider these both WIP, but Ive cranked out hundreds of prints with both, and would not trade either for the OG toolheads they replaced. Cheers.