Sure here:
3DBenchy_T6-SINGLE gcode.gcode (2.1 MB)
And yes it is stock tool head with a nickel plated 0.5mm nozzle
Sure here:
3DBenchy_T6-SINGLE gcode.gcode (2.1 MB)
And yes it is stock tool head with a nickel plated 0.5mm nozzle
Gcode is for 2.85 filament, 230 print temp, lowish fan use. Seems a little low for PETG, temp-wise.
You using 2.85 filament right?
This looks like there’s charred filament in the nozzle. Keep cold pulling until it comes out “clean”
Yes. ill try with higher fan and temp.
will do more cold pulls too
The Taz 6 hot end has issues maintaining high temperatures with the fan on. Just the way it is.
Have you tried extruding and watching how the filament comes out? If it tends to curl or pull to one side you probably have something near the nozzle tip (on the inside) that is partially clogging the flow. Those can be usually cleared with a cold pull but you have to find that perfect temp to get the filament chewy but still rigid enough to not break when pulled on. PLA is around 90 not sure what it is for PETG. I suppose you could do the cold pull with PLA instead - heating to 200 and then slowly cooling to 90 and then pulling right when it gets to 90 works every time for me. The filament is just chewy and rubbery enough to come out in one piece and leave a nice impression of the nozzle orifice on the end.
Cold pulls, I just let it get down to 40-50c, then set temp to 100c while gently pulling the whole time. Once it softens enough, it pulls out.
So, I have to ask. Is your spool mounted on that microscope next to the printer? I wonder if there is too much resistance on it and you are stripping the filament in the extruder.
Yes I am because my spool holder broke but it was printing fine before while it was mounted on the microscope.
Good eye!
@hatchet, throw that spool on a broom handle or anything else mostly round and smooth that you can get horizontal. That’s a lot of extra pulling force required with the spool that way.
I also just wanted to say that this printer is about 10 years old with minimal replacements so it is prone to breaking and having problems.
I have already tried everything I know on how to unclog it do you have any suggestions on what to try?
There’s what I would do, and there’s what others would. If this was my machine, I would completely take apart the extruder and hot end. Then take the bare hotend assembly and plug it back in - heat it and take off the nozzle. Then I would take a noclogger or other long 3mm-ish diameter rod and ream out the filament path while heated again - to like 280. Then I would install a fresh nozzle, heat-tightening it. Then reassemble the extruder using OHAI - taking care to clean the hob gears and ensure the filament path above the heatsink is also clear.
This is what I would do, and have done, many times. There are obviously less invasive ways to deal with this but they would trial and error. I just go for broke and rebuild it so it’s as new.
You said you already changed the nozzle or did I miss that?
Yes I did change the nozzle very recently.
I’m still pretty sure the nozzle isn’t getting installed right. It’s a fairly tedious process to do it right. If not done right, a gap appears once things heat up. That gap gets filled with plastic. The plastic is then trapped in the hottest part of your printer. When your nozzle heats up from ambient, that section far exceeds the target heat, which glazes the filament to where it no longer can become liquid. It’s now permanently obstructing the flow of filament that goes through.
Tear the hot end down completely, clean it out, completely, and install the nozzle correctly in stages of heat.
This is a pretty good write-up on the procedure: Howto: Change Hexagon hotend nozzle - General / Hardware - LulzBot
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So I tried cleaning it in a way i had not done before i stuck a 3mm ish wooden pointed kebab stick ad pushed out all the residue that was there. Thanks so much for all the help!
The only problem I can see is that filament keeps leaking through where the nozzle is connected but apart from that the printer is printing better than it has for years!