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Bad PTFE Coupler?

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I have been having the same problem on my printer, after 2-3 cm the nozzle is blocked up.

IMG_4522.thumb.JPG.3b721650b4c5dba4656dc535eb78cdbf.JPG

I installed an Olsson block and I have not been able to have a successful print. I got a feeling that the filament is starting to melt (and jam) at the PTFE coupler. Any way how I can find out? Other suggestions? It always seems to block at a certain height.

Im going to order new PTFE couplers, but these are quite expensive...

Thanks for the help!

Thomas

IMG_4522.thumb.JPG.3b721650b4c5dba4656dc535eb78cdbf.JPG

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If you do some atomic pulls you might get a clean an idea of the problem, also it's quite a good idea to do it from time to time to keep al clean. To check the coupler you actually need to take it out and looks at it, also the shape of the atomic pulls sometimes give a tip of the how good/bad the coupler it's. Do 5 atomics and make photos of the pulls.

http://support.3dverkstan.se/article/10-the

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