PA+CF filament blocking - Hardware, firmware and software help

RE: PA+CF filament blocking

JanK — Thu, 11 Aug 2022 06:39:35 +0000

I have solved the clogging issue. I have dried the filament (overnight, at about 50 degrees C) and the print completed successfully. Good to know.

Jan

Diem — Tue, 09 Aug 2022 12:28:53 +0000

I was assuming you were printing from a drybox, nylon is extremely hydroscopic and a couple of hours exposure is enough for trouble.

https://help.prusa3d.com/materials

The two standard fixes for a filled material clogging are a larger nozzle and try a few degrees hotter.

Cheerio,

RE: PA+CF filament blocking

JanK — Tue, 09 Aug 2022 09:47:25 +0000

No, 0.6mm is the largest I have.

One idea I got today was that it could be because of a wet filament, although it was stored properly. I will try to dry it.

Jan

Diem — Tue, 09 Aug 2022 02:13:03 +0000

Do you have a 0.8mm nozzle to try?

Cheerio,

PA+CF filament blocking

JanK — Mon, 08 Aug 2022 21:53:13 +0000

Good evening. I have Prusa MK3S, about 2 years old, which works fine. I have succesfully printed many objects using PLA, PETG, ASA, Nylon, PP, PC, FLEX... However, I have difficulties printing with the Spectrum PA6+CF15 (nylon+carbon fiber) filament. I am using the hardened steel M6 nozzle. The printing starts fine but after some time (e.g. 30 minutes), the filament is blocked and stops flowing. To unload it, I need to open the extruder and remove the filament manually, since the filament is deformed by the extruder wheels and they can no longer get a good grip. I have tried increasing the temperature, reducing the speed, increasing the flow rate, loosening and tightening the extruder screw, switching off retraction, changing the spool holder and other things but I did not succeed. The same nozzle prints fine with other filaments such as PETG. Smaller objects print fine with the same filament (nylon+carbon).

Any idea where the problem might be?

Jan