There has been some time ago since I talked about E3D fix, so here it is. It has to be said, its still untested. Working on so many exciting stuff at the moment, that I just cant find time to do all the tests. So basically all I did is I brought back the PTFE tube into the game and shorten the heat sink a little, just enough so tiny little bit of fan will be blowing trough the heat break. Its needed to say this is only gonna help out with PLA filament, with ABS stock E3D is really THE BEST out there! @Sanjay_Mortimer need to write you an email, was looking at the kraken, really really great job!
The other thing, new pinch wheel for a geared NEMA or any other extruder motor for that matter. I went pretty large with this one and being machined from stainless steel with custom made tool the grooves are maching perfectly giving ultimate grip and being stainless I reckon its the last pinch wheel you will ever buy. The diameter was calculated to give with a 1,8degree, 1/16step and 5,17:1 geared stepper around 270steps/mm (still need to calculate it fine), witch would suit both, the 1,75 and 3mm users. Of course, the 3mm need to have different teeth profile, but that will be another battle…More to come, gonna be exciting end of 2013/beginning of 2014!
What issues are you trying to fix? The hotend should (and does) print PLA out of the box. We had some initial manufacturing issues around v4 (the version that you bought from me) that caused issues with PLA, but that is all now resolved. No PTFE involved!
Love your custom black heat sink by the way. Did you anodise it or use some sort of chemical aluminium blacking solution?
@Sanjay_Mortimer its hard to describe, but with bowden setup and in cases with many short retractions, in case slicer wants to fill small gaps-circles-areas, there has been constant problems with almost like jamming issue. I think the melted/softened filament comes up to the heat sink area and start to stick to the wall. A fan trough the barrel (in that tiny 2mm or so spot between heater and heatsink) gets rid out of 90% of this issue, but not completly. Hope to have this piece of PFTE tube solving this completly.
Yes its anodizing, I have really great source for this, actually the company from whom I ordered two of these heatsinks organized also black bling-bling.
@Matej_Rozman I noticed that too, I’ve gotta order a new heatblock (long story) so I’ll get a v5 heatsink too.
3 new heatbreaks, 1 new nozzle, 2 new heatblocks, 1 new grubscrew and a new heatsink but its the same e3d!
FYI, my V4 is currrently unemployed, I have V5 mounted for sometime now and has the same simptoms as V4, maybe only in smaller form. I belive Kraken has the best possible solution at least from what I saw.
@Liam_Jackson have you crash tested yours, mine vent trough a lot but never any damage?
We think my thermistor came loose enough to not hit mintemp so that the board kept the heater on, came back and the whole block had melted! Then I twisted a heartbreak by over tightening, now I’ve broken a Nozzle off in the heat break. Nothing wrong with the e3d I’ve just been unlucky and clumsy! I’ve had a couple of great prints out of it though!
I can’t make my E3D v4 to print PLA. It extrudes the first layer and then it completely blocked. I hardly can pull out filament back by hand. So I had to switch back to my old J-head. I hope I can do something similar to fix it.