wickwire great replies , i have got same tube but not fitted it all yet will do soon.
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I wrecked one of my teflon tubes, too. I bought a 5-pack of replacement hot-end barrels off Amazon but they had 4mm OD PTFE linings in them, and a lot of stuff just printed too differently for my taste. (PLA and ABS seemed to print fine, but PETG-- my bread and butter material --didn’t print right anymore.) Either due to the different barrel design, or additional thickness of teflon…
I finally just bought a meter of 3mm OD PTFE tubing and waited like a bloody month for it to arrive from Malaysia via slowboat while I used the lining from the left extruder to get the right one back up and running. Taught me an important lesson though; stock up on replacements of anything that can take down your printer!!!
Also, stay away from PFA. It’s supposed to be rated for the same temps as Teflon and it was easier to source in the right diameter, but if you take it up to 240°C to print PETG or something…it’ll LIQUIFY. Not melt or deform, LIQUIFY. (Invented some new curses for that one, I did.)
at first CTC dual extruder 3d printers are not recommended to buy it have lot of problems.
I whole heartedly agree.
There are indeed differing levels of 3D printers on the market. when I bought my CTC, I could have had a cheaper option like a Prusa I3 which required much much more assembly, set up and calibration.
OR I could have gone for the much higher end of the spectrum and got a stratasys or something like that (enter very expensive brand name here)
I’d never used a 3D printer before let alone knew anything about them, operations or materials. I opted for the CTC because it was already assembled taking out a lot of the work.
Straight away though I had issues, exactly as you’ve mentioned. The nozzles would clog, the prints wouldn’t stick, I couldn’t get replacement Kapton for the bed cheap, the extruders would skip on the filament.
Over all, it was a terrible machine which I couldn’t trust to run more than an hour without messing up.
It was from that I persevered with it, I replaced the stock fixed extruders with spring loaded ones which has solved the skipping on the filament. I replaced the PTFE tube with that which is 1mm longer so that it’s compressed in the thermal barrier tube, no more clogging or jamming.
I’ve since made a TON of other modifications and the print quality is fantastic but is still only as good as the settings I use.
My point being, no matter what level of user you are, no matter what level of machine you have, it’s still developing and there’s still a lot to learn.
I’ve recently built a Rostock legacy and had masses of issues with it, so much so I started to design MY OWN printer to repurpose the parts I bought for the Rostock. But I persevered with it and now it’s at a point where I’m happy with it. Just further reiterates my point above.