Originally shared by René Jurack
Ok. So the MAPA-nozzles get my full recommendation. Printed over 24 hours with it and PETG and there is NOT THE SLIGHTEST BIT of PETG on the nozzle. Didn’t even think that this is possible!
https://www.youtube.com/watch?v=mqp4EKxV3XY&feature=autoshare
I’ve been running the nozzle on one of my MK2s for a huge part of the filament tests I’ve been doing, including carbon-filled materials. Still going strong! I’d say there are very slim chances of the coating ever coming off or wearing out with “standard” materials.
@Rene_Jurack have you tried the heat break, too?
Yep, have 3 heatbreaks of them in the prototype of the weP4. In cases, when the original V6 heatbreak is prone to fail, the MAPA-ones still do fine. In the beginning, I played with different “high-end”-stuff and materials like titanium- and copper-alloys for a hotend I would finally like. (You probably noticed me posting about custom-milled hotend-stuff…) Now, that I stumbled upon MAPA-parts, all that is not needed anylonger. Sure, I have no long term experience yet. But these work flawlessly right from the start and if they do this a longer time, I will be very pleased. Funny side-note: I knew about them months before, but I probably would have never tried them on my own. But I won a nozzle in a printing-contest for free and tried it “for fun” and, boy, I was very happy with it!
Yeah, the MAPA heatbreak is a bit thicker at the throat - which makes it more robust, but in my case also meant that PLA would consistently jam after a few minutes of printing, while the original heatbreak was doing fine. I guess I’ll have to give them another go!
I dont talk about robustness… I have less Jams than before. Zero, to be precise… When printing with 0.2 nozzles and low layerheights, there are very low extrusion rates. This is tricky with PETG. But no problem with the MAPA-ones. I dont print much PLA, only the fiiled ones like wood or copper, but got no issues either. I am going to measure one tomorrow, maybe you got a bad batch?
@Thomas_Sanladerer Ok, my MAPA-heatbrakes do have a wider neck, too. 3.5mm instead of 2.95mm. And I used the thermal grease provided by them (>2,17W/mK).
@Thomas_Sanladerer Did you use E3D grease or the MAPA grease for your heatbrakes? That is the only thing I did different to my other hotends (9 in total) Asking, because I am curious… On the DICE there is no “top notch” airflow to cool the heatsink, it is merely enough and thus I should have reasonable more problems than you have, if the wider neck is the problem?!
@Rene_Jurack I think I even gave it some MX4 (~9W/mK), in either case decent thermal compound.
Printer was the MK2, which doesn’t use the original fan shroud and does not direct any airflow over the neck of the heatbreak, as some users recommend.
weird…
More testing required.