silver-girl

Thanks for the tips - it was the PTFE coupler, in the end, which I replaced with a TFM one. This is odd as I only replaced it a few weeks ago and can't have done more than 200 hours printing on it. It didn't look burnt at all (like the pic in the online guide), maybe a tiny bit deformed. I think it could be a combination of printing many long prints at a high temperature plus being a bit too fierce on my pull technique. The tips about the atomic pulls are really helpful thanks. Yes, I have a Matchless nozzle which has twin channels. I found that @geert_2 slow wiggle technique didn't work for this type of nozzle as the channels just break off and get stuck in the nozzle. But it's definitely a good idea to be a little more gentle both on insertion and on pull. Thanks also @geert_2 for the photos what a deformed PTFE coupler will look like on a pull. I've attached my before and after (coupler change) pulls for comparison. A new Bowden tube and nozzle arrived in the post today. Annoyingly the nozzle has a different socket size to the others so I can't try it out yet! A few more questions: Temperature: The default setting (not sure whether Cura or UM) for 0.6mm nozzle is 230ºC - do you think this is too high? I've dialled it down to 220º and it seems to come out fine. @PyramidHead76 What is thermal paste, is there a brand I should get, and where exactly does it go? Fans: I printed overnight and I came in this morning to a perfect print - but the side fans were still on despite the nozzle being room temp. Never happened before. Currently printing now and I can't adjust them off 100%. Thoughts?

Hi, wondering if this fixed it for you? I'm having a similar problem: I'm printing 25 or so of the same 19hr file, PLA on a 0.6mm nozzle. While I was still prototyping, I had a nasty leakage which I cleaned up, but the extrusion has never been as good. On Thursday I finished a print and went to change the filament, and the extrusion, after initially coming out fine, went down to almost zero. At first the filament extrudes fine, then after after 30secs it becomes very very slow. The feeder starts clicking and grinding as there's nowhere for the filament to go. (See pic) - worked through the extrusion problems list - tried various filaments including ones I've used before, new and old - atomic clean several times - dismantled and cleaned Bondtech feeder - cleaned and inspected Bowden tube - I changed the PTFE coupler a few weeks ago, but am getting a new TFM tomorrow just in case - cleaned the fan and heatsink Any other suggestions? I'm getting pretty desperate - need to have these done by next week! P.s. I've always had atomic cleans that look like this - is this normal? I've never seen anyone else's looking like this.