clogged extruder -- think I found it !
Hi,
As I posted in other treads, I got two blockages in 2 days with my MK2 upgrade. Never happened before. After a sleepless night 😮 I reflected that yesterday I got strange 'blobs' on a large print I did. I did not understand where they came from. See picture.
I disassembled the extruder and saw that material had run out from between heatsink and heat break. Getting it cleaned required setting the Nozzle heat to 9 deg in settings, the clot became weaker then.
I remembered the comment from PRJ in another post that some extruders do not have the PTFE tubing fully inserted. Mine was only halfway in and sticking out.
In the excellent documentation on troubleshooting on the E3d website it says that tubing should be fully inserted into the heat break ! http://wiki.e3d-online.com/wiki/E3D-v6_Troubleshooting I will try to get some extra tubing from Prusa, I am not sure if it sticks out enough now on the feeder end.
Also if you are having trouble with the tubing, the black ring on top should be slightly lifted to move it, also from the E3D site.
So that is what I will try now, keep you posted.... any other comments welcome.
Re: clogged extruder -- think I found it !
update:
I still have material coming out from between heat breaker and heatbed, as in the second image. I am sure this is my problem, but what is happening here ? Is it the heartbreaker not screwed far enough into the bed ? I think the nozzle and the breaker touch.
What to do ?
Re: clogged extruder -- think I found it !
Alain
Your nozzle is not tight enough.
You need to heat your nozzle to 215 degrees, and tighten so that it is tight on the heat break.
Before you do this, ensure there is a small gap between nozzle and heat block so that tightening is possible.
Also when tightening you need to use correctly sized spanners for both the nozzle and the heater block.
Basically, the heater block has a threaded hole in it., The heat break is screwed in from one side and the nozzle from the other. The nozzle must seal against the heat break to prevent plastic from oozing out of the threads. Unfortunately, if this does happen then the threads will need to be cleaned out as the plastic may prevent the nozzle and/or heat break from making a good seal.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: clogged extruder -- think I found it !
Hi Peter,
Yes, I just realised that. Although I tightened it, when it was hot I could easily fasten it further. Need to clean now as you said.
How far does the heat breaker need to go in ? Do you know ?
Thanks for the info !
Re: clogged extruder -- think I found it !
Alain
Screw the nozzle fully into the heat break, then unscrew 1/2 to 3/4 turn. Screw in the heat break as far as it will go. This then allows 1/2 turn for tightening the nozzle when hot.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…