Hey all,
I recently installed the e3d Chimera, but when I start extruding it gets jammed, of it let it cool, then pull it out (with force) I can see this ridge pattern.
I am using a rigidbot with direct feed to the Chomera.
What is going wrong?
you cannot put it in/out while it is cool. it must me hot. your filament was not inside extruder pipe correctly. make it more precise.
@JGUI_Janusz_Gerszber I pulled it out after it cooled, and while it was heating up. Its a trick you can see the shape of the hotend. The reason I had to apply force was because a ridge is formed, that’s what you see in the photo. I manage to replicate this ridge, it looks like something is not right inside the hotend.
When the hotend jams up even when hot the filament gets stuck because of this ridge. My fan works great, there is thermal paste.
Did you follow the instructions to hot tighten the nozzle to the heat break?
@Chris_Thomson I did, but it did not seem to tighten as much as they said. And now I am not sure how to repeat it without making a mess because the thermal paste os already applied
Hopefully you still have plenty of paste in the packet? You only need to apply a very small amount. If so pop the hot end assembly out of the cold end and use some kitchen paper to wipe the paste off before you start.
That said I do find you don’t always seem to get much movement after cold tightening.
In this case I would try a disassemble and reassemble myself. On reassemble, pop the nozzle in first and loosen off a little then screw in the heat break. That should ensure you have enough space to tighten the nozzle further on heating to ensure they are flush inside.
When you disassemble if you find some plastic or burnt out plastic in the heater block that would confirm they are not currently flush. It’s worth correcting sooner rather than later as I left one that was not flush and I had a nasty burnt plastic leak to clean out.
Ok will try that
It sounds like what Chris is saying. Even with an experienced builder sometimes the E3D assembly doesn’t seat right the first time.
Ok also E3D replied just a few hours ago.
First thing they mentioned is my firmware thermisor setting might be wrong. Can anyone tell me what thermisor is in the Chimera? Is it also ATC Semitec 104GT-2 ?
@Guy_Sheffer yes that’s the one. Option #5 in Marlin.
Yes I think so, in repetier firmware I currently have selected 100k EPCOS, which isn’t right, but seems to work. 
Will have to fix that!
@Chris_Thomson It’s a minor detail that people seem to really fixate on. The reality is there are plenty of people using EPCOS and Semitec thermsitor tables interchangeably, and while the nozzle may be a few degrees off and no one would know, I haven’t heard of any house fires or poisoning due to the material offgassing (knocking on wood here, please no catastrophes on my karma account).
I’m with Ray on the thermistor, from your sample you’re melting just fine so it can’t be way off. What does look apparent though is that there is some mis-alignment between the heat break and the barrel; the end of the unmelted filament doesn’t seem aligned with the melted part. I haven’t seen this unit up close so don’t know what provides the axial alignment, but I always use a dowel of some type down the bore during assembly to maintain that alignment.
Ok so I reattached the nozzle to the other side, did a hottight again, now when I do the same thing I dont get hte ridge, thanks all!
Please send a pic of the side view of the nozzle/ heater assembly. I want to see if maybe the heater block was attached upside down.
@raykholo No it wasn’t. I checked that when building. anyway, it works now.