Can't seem to get Atomic Method to work

[StarShadow 0]

I am using 1.75 PLA, and I believe the extruder is clogged because the material is hardly coming out of the nozzle very well. Like the extruder motor is really stressed trying to push filament out (even at high temperatures)

So like anyone would do, I decided to clean the nozzle. [with the atomic method]

I set the nozzle to 260C inserted some filament.

Set the temp to 90C and waited for it to cool.

Then I got a firm grip on the filament and I gave it a nice pull.

The problem that I'm having is that the filament breaks off right at the isolator (which also makes it extremely hard to put back in)

so I did it again but with a higher temperature, and I got the same result, the filament broke off at the isolator.

I can't figure this out, I can manually push filament through the nozzle (very slowly because it is clogged) but when I attempt to pull it out it seems it is extremely stuck and just breaks off, even at higher temperatures.

I will keep trying but I don't imagine I will get any different results from the first times.

[ultiarjan 1,222]

First.. 260 is too hot imho for pla. No need to go over 230 I think. I also keep pushing plastic in when its cooling till I feel the resistance really going up. Not sure but probably at least till 190c.

The best pull temperature varies per material just try with higher temperature and if it's still a "string" do it again a bit cooler.

And make sure to park you head in a corner not to bend your xy axis!

[ultiarjan 1,222]

Oh. And out of curiosity what printer do you use on 1.75?

[StarShadow 0]

Oh. And out of curiosity what printer do you use on 1.75?

 

It's an Ultimaker 2 that I built myself. (The aluminum extrusion design)

Edited March 26, 2016 by Guest

[StarShadow 0]

First.. 260 is too hot imho for pla. No need to go over 230 I think.  I also keep pushing plastic in when its cooling till I feel the resistance really going up. Not sure but probably at least till 190c.

The best pull temperature varies per material just try with higher temperature and if it's still a "string" do it again a bit cooler.

And make sure to park you head in a corner not to bend your xy axis!

 

After a few tries I think I got it now. Came out clean and now it's back to printing consistently.