Journey from printing to doing a cold pull to a messy blob - is there any saving this?  

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

Here's a video of the mess... embarrassing. 
https://i.imgur.com/vekhkjJ.mp4

Looks like it started leaking out of the block? I have no idea how it would go UP out of the nozzle - so at minimum, I'm expecting to replace some parts...

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

@wopas

I heat the extruder to a high temperature then use a temperature controlled soldering iron to help carve the waste off near the wires. 

be very careful, the wires are fragile, especially the  thermistor wires

some people use a hot air blower, but this risks damaging the extruder housing

regards Joan

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

Or you can use a heat gun and tweezers.  Be careful with the wires.  

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

Agreed.  Heat to the material temp higher than the one you were using - and it will start to fall off.

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

Recommendation: if-and-when or next time you change nozzles read the E3D nozzle change guide. There are important steps that if missed will end up exactly as shown above.  The other common cause of the rats nest is a print sheet that is less than clean: as in a single finger print can cause what happened to you.

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

we don’t need no stinking instructions.

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

I really appreciate the replies. I'll give it a shot. You guys are rockstars!

By the way - everything is original - but I suppose I might try replacing the nozzle if cleaning what I have doesn't work out.

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

Turned the heat up to 230, got most of it off, turned it up to 250, got the rest off.

I read in another thread that there can be heat creep - causing it to jam midway through the print.

So I pointed a fan at the printer and so far, it's been printing great. 

Thanks again for all your help. 

RE: Journey from printing to doing a cold pull to a messy blob - is there any saving this?

Posted by: @wopas

Let's start at the beginning... I've had my Prusa Mk3s+ for 2 years now, but used it rarely.

Stage 1 - everything prints fine for about 10 prints.
Stage 2 - Occasional clicking can be heard, but prints are fine 5-6 times.
Stage 3 - Prints are starting to fail after getting about 1/4 of an inch done. 
Here's as far as my prints got - on a 5" tall model : 

At this point, I started doing troubleshooting - pushing media through and doing a cold pull. 
Photo of the pull:

Stage 4 - Tried another print - and it seemed to be going well, but I returned a few hours later to this...

 

It gets worse...

 

I have no idea where to begin to fix this. 

"For 1 year, no worries, but afterwards, lots of problems with the first layers and also misfires because of 'clogs or blobs'.

I no longer have a problem since I replaced the 40x40x10 mm 5 Volts fan with a Noctua 40x40x20 mm 5 Volts.

You need the STL of the adapter and print it and of course buy the Noctua 40x40x20 mm on Amazon or other sales site.
The assembly is just delicate for the electric cable. Sometimes you have to adapt, I made a connection on the cable of the old 10 mm fan.

The problem stems from insufficient cooling (perhaps a 10mm loss of fan efficiency) and the temperature above the heatbreak is too high.
Better reffoidissement solves the problem.

It became a pleasure for me to use the printer again.

What the trouble: http://wiki.e3d-online.com/wiki/E3D-v6_Troubleshooting

STL Adapter: https://www.thingiverse.com/thing:3484443

"