Nozzle keep blocking

[Kathy7 0]

Hi, I bought Ultimaker 2 about one year. Recently, I found the nozzle blocked more often than before.

And every times I pull out the bowden tube, the shape of PLA filament is look like the following img.

Is it because the wrong temperature or other problem?

temperature: 215°C

[DidierKlein 729]

Hi and welcome to the forum!

Have you checked your Teflon coupler? How many hours of printing to you have?

[Kathy7 0]

Hi and welcome to the forum!

Have you checked your Teflon coupler? How many hours of printing to you have?

 

I print about 7 hours and stock at 6 hours

I did some adjustment, it seems worked. I put the 3D models closer and "print all at once"

[JATMN 6]

@Kathy7

I think he meant how many hours total do you have on that Teflon coupler.. it is a wear and tear item that needs replaced occasionally based on usage.

[Kathy7 0]

Thanks JATMN

Probably about 2000hrs.

[JATMN 6]

yea thats.. way past the life cycle of the ptfe insulator.