Apologies if it's a dupe: Conversion to 1.7mm?

My apoloigies for what is I am sure an duplicate question. Funny thing is - the forum won’t let me search for “upgrade filament 1.7mm” because they are all “commonly used words” and I cannot use them in my search. So I have no easy way to find the answer it seems. Googling gives a reference sheet from adafruit on converting the TAZ 4 but I’m not sure how similar the extruders are and if thats possible. The TAZ modifications thread has a link to a 1.75mm toolhead, but it just goes to an undocumented file directory full of stuff, none of which seems to be a guide or usable parts. I’m looking at the 1.7 E3D head and all that comes with, however, if its possible with the current hot end (even if it’s not ideal) I’d like to give it a shot.

Before the “why would you want to” questions (I’ve read a lot about how 3mm is better in many ways for the TAZ 5) - I’m an old Makerbot version 1.wooden-unstable-piece-of-crap-hate-it-time-to-get-a-working-printer-hey-lulzbot-looks-awesome owner. With an absolute TON of 1.7mm filament I’d hate to have to toss (or go through the hassle selling - a lot of it is still factory sealed. Got a good deal on line a while back and bought a ton of 1kg spools for about $8 each, and no, it’s not the cheap garbage either).

So the fact I’d have to pay roughly $400+ to replace the 1.7mm filament I own now is incentive to try and do a temporary conversion until I use up the other stuff.

Will my .5mm nozzle be ok? I know it’s not ideal, but will it be adequate for a while? Or should I really get a new nozzle? Are there plans or a guide anywhere for the TAZ 5? Is the extruder in the 4 close enough to the 5 that I could use that guide and the 3d models provided?

Thanks a lot in advance, and again, sorry for re-asking a question that I’m sure has been asked many times before. I just can’t find the answer, and the links in the mods thread are either over my head, or outdated.

Some users have found 1.75mm filament already works with the existing hexagon hotend. Might be worth a try, with caution.

On the other hand, you could try the fine filament conversion service at http://ebay.com . :wink:

I’ve considered that “service”. It’s a massive pain in the ass Ebay and I don’t get along well anyway :wink:

And it’s the “with caution” that concerns me. I dont want to potentially ruin anything just to use the filament.

How different is the Taz 4 and 5 extruder model?

The Taz 4 used the Budaschnozzle 1.2c extruder, which has a PTFE liner and is only capable of reaching 240c temperatures before important things melt. The Taz 5 uses the hexagon all metal hotend, which will go to higher temperatures, but also requires an always on fan to cool the bore. Here’s the instructions for adding the hexagon hotend to a Taz 4: https://ohai.lulzbot.com/project/taz4-hexagon-toolhead/accessories/

To print with 1.75mm filliament, many people have had success with using the stock 3.00mm configuration. There are different nozzles for 1.75mm filliament that have a smaller bore inside. The 1.75mm variant of the hexagon body itself may also have a smaller internal path, but I haven’t seen one in person.

Just FYI, new hexagon hotends are fairly inexpensive.

http://www.reprapdiscount.com/hotends/67-hexagon-hotend-set.html#/filament-1_75mm

I have, it is a smaller bore and has worked very well so far. :wink:

The plans I saw on the adafruit PFD (here: https://learn.adafruit.com/downloads/pdf/taz-4-1-dot-75-filament-upgrade.pdf ) shows printing a whole new assembly, I’m assuming because of the rollers/grips/etc.

Would just replacing the hot end be enough? Any clue?

UGGHHHH!!! Screw you New Years Day! I was about to Amazon Prime one overnight. Nope. Best delivery is Monday. Stupid holidays screwing with my extended weekend. Grumble.

That’s for converting a buddaschnozzle. If you are going to change anything, going to the hexagon is the way to go. But, if you want to stick with the buddaschnozzle then yes, that approach will work, For the hexagon you will need to print a different extruder body anyways.

You can find the STL for the Lulzbot Guppy here: http://devel.lulzbot.com/TAZ/accessories/fangtooth_guppy/stl/

Print out extruder_body_1.75-guppy_0.5.stl and use a 1.75mm Hexagon nozzle.

Works fine.