I got the new v6 nozzles and they print really good now (without drilling . I have printed a lot of different nylons, PLA and Ninjaflex, not had a coaster yet. But i still run with some retracts of around 5-10mm. But i am satisfied now. The UV colorchanging PLA E3D have is really cool, and very easy printable. So there WAS some bad design on the old nozzles.
Hi Josh, Sorry so long to get back, I've had a load of work, also changed again the kinematic tool head and effector, have been battling some strange intermittent issues that turned out to be a dying microSD card on my smoothieboard, and finally (to remove the doubt) re-redesigned (!) the airtripper extruder (that I had adjusted for a NEMA14, and also to be direct drive, with a robotdigg supersharp direct drive toothed gear!: the reduction in size for NEMA14 caused the filament to bend out about 1mm, so there was friction against the hotend side of the extruder). Now the extruder I'm sure is perfectly straight, but still the issue arises, all this with the adapted shroud available on this thread - finally now I tried my new shroud, but does not seem to make much difference - I think the amount of air that can really reach the heatbreak is not enough to make much difference - I think I'll be ordering a v6 ASAP to check out my doubts here too - if it goes that much better we'll see! If you want I can send you the stls for the extruder - I have a slight doubt still that the nema14 has enough power to push the filament thru - maybe you could get a robotdigg drive gear and try it out? Cheers! Andy
I am getting tired of this now, i have jamming problems again. Especially with ABS. Nylon is still printing ok, but that is because nylon is harder and therefore the hobbed bolt can't chew on it. ABS so soft the bolt instantly chews when the resistance gets bigger. This is even if i get max pressure on the hinge. I have now tried the new V6 nozzles and the problems are still there. The only nozzles i can print ABS with right now is 0.6 and 0.8 nozzle. There seems to never get high backpressure with those. Is there any problemfree hotend out there? (not e3d).
I drilled the heatbreak ( is still have an original to revert to) to 3.2mm instead of the original 3.1, now it seems no more jams. I think my filament was uneven (around 3.0 )because i extrude it myself. Will also fix another smaller nozzle for the extruder to get more around 2.8 instead.
Is there room for one more whiner chiming in, "me too, me too," or is 7 pages of the SOS adequate for this thread??? Well, I've been fighting mine since June and am as sick and tired as Cosby's mom of wasting DAYS UPON DAYS with ZERO to show for it! I got my 1st roll of Taulman Bridge about the same time as my v5 H.E. but have been reticent to waste any of it when I can't get PLA working more than once in a blue moon. I'm running a 1.75mm Bowden setup in a converted PrintRbot+. I finally broke down and TRIED the Bridge, to no avail: still jammed up in the H.E. causing a problem back at the extruder hobbed bolt. With the Bridge, however, it just wadded up a bunch just below the teeth rather than chewing through like PLA. As for this nozzle drilling routine - I'd have to know precisely what's supposed to happen, and so far I'm still unsure! I did measure mine, though, and discovered that the larger, upper bore extends down to the flat surface of the pseudo-nut. This means that the conical protrusion with the 0.4mm bore is about 1.9mm "tall." My guess is that this means I'd be looking at drilling into the inside of that cone about 1.4mm more. I think I want to SketchUp it first to see just how close I'd be getting to the surface. Meanwhile, I'd really love it if SOMEONE would pipe up w/ helpful hints how to make this thing PRINT AGAIN##%#% PS - I done dood it - I drilled my nozzle, though not to within -.5 mm, as close as I dared: ~-.85 -- and this seems to have me back in the land of the printing!!! Kudos to mhackney, of course, and - forgive me for my initial skepticism. Guess I'll go ahead and get me a new v6 nozzle, or two....
