My Printrbot 1405 with metal extruder and new-style Ubis hot end. Fancy optional oil dispenser newly added on top of extruder, seems to be doing the trick.
(In response to inquiry on https://plus.google.com/u/0/+PatrickRyan/posts/7BR6Jhm3Ydg)
There’s very little oil there, but that occurred to me as well. Dunno. I’ll see how the test prints turn out!
My brother suggested it - says he does a little lubrication of the hot end with every filament change. @Nathan_Ryan want to jump in here?
I have been dipping the tip of my filament in canola oil everytime I change the filament and in 2 weeks had not had any jamming issue.
I’m using canola here. Now my printer smells like french fries, so I guess that’s win-win?
@Andre_Courchesne1 I do the same. I’ve seen the oiling sponges but haven’t used them. Just dip the filament end in veggie oil a couple cm.
I have been waiting for the metal hot end to get back in Stock. Still waiting. Nice filament luber. What prompted it?
Emmett, of thingiverse fame, oils with every print. A little square of paper towel and a zip tie. I saw it on his Printrbot Simple at maker faire 
can’t argue with Emmett.
@Dat_Chu Some filaments seem prone to jamming. It seems to be a heat issue, but since I’ve already got multiple fans - on the extruder motor, on the hot end, and directed at the work piece - there didn’t appear to be many other options. A bit of a Hail Mary, if I’m honest - but it worked! So I guess @Brook_Drumm is right to trust Emmett! 
@Branden_Coates I don’t see any problem with layer adhesion at all. It seems like there’s little enough oil involved that the parts aren’t really affected. They’re certainly not greasy to the touch, for example, and I can’t detect any reduction in strength.
Given the fact that I’ve seen at least three different rolls of filament that exhibited a tendency to jam before I started doing this, and resolved it with a little lubricant, I’d say it’s now going to be part of my normal routine. I printed a little box to hold the foam and thread the filament through. Easy enough to do, with an occasional oil drop, as part of the process of changing filament.
I’ve thought about adding an “oiler”
@Patrick_Ryan , do you have a STL for a design that fits right on top of the Printrbot? The current solution works but kindda hacky.
No model but should be trivial
@Dat_Chu They’re small enough to ride on the filament without being attached to anything. Mine floats about the extruder inlet, occasionally resting on it, occasionally bobbing around above it. I can’t find the two part one I printed, but this one actually looks better:
i am holding off any further mod till I get my @Printrbot geared extruder. Than it will be a major mod on my Simple to fit it and may add an oiler too.
Btw @Patrick_Ryan got some filament from 3xis http://www.3xis.com they are in Canada as we are. so far pretty good for the price.
@Patrick_Ryan , is there a sign up line for the new metal Ubis that I don’t know about? I have been waiting (rather impatiently) for this new future 
@Dat_Chu Ordered mine in November. I don’t think it was beta or special ordered…?
The limited number we had sold off in days. Way way beyond expected sales. Black Friday and my misstep of initially including it with the new plus sent that product over the edge. I had to apologize for over promising, and ask Carl “when can we promise the world a never ending supply of all metal Ubis hotends?!” His answer was… Let me took up, and I’ll get backntonyoubwhen m ready… Could be two months or so. Here it is two months later and we are very close to opening the flood gates. The ramp up will start soon and we should be able to get to 4000 a month before too long. This hotend is a water shed for us. All indicators and testing tells me we should have not only the best performing hot end on the market, but the best value…, and enough to supply competitors if they want it.
The wait is painful, but worth the wait.
Brook
Thanks Brook!