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A lot of problems after changing to 0.6mm nozzle  

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trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@judas

I experience this on all filaments. Prusa or not 🙁 if I remove the filament sensor it’s much better. Was not this way the first 3 months, just started like this after nozzle change, so most likely it’s a flow problem.

Posted : 24/04/2021 7:08 pm
Judas
(@judas)
Eminent Member
RE: A lot of problems after changing to 0.6mm nozzle

@trondkla

I don't use a filament sensor, but there's only a few places for the filament travel to be snagging on it's way to the nozzle. I would inspect both ends of the bowden tube, and the PTFE tube in the heatbreak. I use a drill bit to lightly chamfer the ends of the tubing before reinstalling.

Posted : 24/04/2021 7:22 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@judas

The tube looked good now, but I did not see the chamfer last time, so it may have been installed the wrong way when I had the problem,l. Haven’t clicked or grind after fixing this morning.

I’ll try autotuning to see if the wholes stop forming.

 

Posted : 24/04/2021 7:27 pm
Judas
(@judas)
Eminent Member
RE: A lot of problems after changing to 0.6mm nozzle

@trondkla

Yes the chamfered end goes down into the heatbreak, and that could've been causing the flow issues.

Posted : 24/04/2021 7:38 pm
trondkla liked
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@judas

Yes, but it still is doing something weird 🙂

Posted : 24/04/2021 7:40 pm
Judas
(@judas)
Eminent Member
RE: A lot of problems after changing to 0.6mm nozzle

@trondkla

I usually just print a big flat square for dialing in my z axis. I'm not entirely sure what is happening on yours, but after messing with the hotend repeatedly it would be a good idea to check that the x axis rods are not twisted. I use a square sitting on the print bed to see if the rods are twisted, and you can adjust them by hand. Mine were quite a bit out of alignment.

Posted : 24/04/2021 7:47 pm
trondkla liked
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@judas

That makes sense, thanks! Ill try tomorrow 🙂 keep you posted. Have a Nice night

Posted : 24/04/2021 7:57 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@judas

After some tweaking im here.

Mostly good, but some lines going outside 

https://www.prusaprinters.org/prints/18760-xyz-test-cube-20mm

Posted : 26/04/2021 8:09 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

Other direction X

Posted : 26/04/2021 8:11 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

Other direction Y

Posted : 26/04/2021 8:11 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

Top

Posted : 26/04/2021 8:16 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

I did a temperature tower before tweaking, it failed on 220, but was nice around 200.
I'll try print againt and print a benchy tomorry.

Posted : 26/04/2021 8:55 pm
Judas
(@judas)
Eminent Member
RE: A lot of problems after changing to 0.6mm nozzle

@trondkla

The purple object was after I changed my nozzle, and it has similar problems to yours. What it ended up being was my z height was way too high, and after dialing it in lower everything was great. I used this file rather than printing an entire benchy, and it only takes a few minutes. Once yours looks roughly like mine then you're probably all good. https://www.prusaprinters.org/prints/21773-1mm-3d-benchy-bottom-for-first-layer-calibration/files

 

 

Posted : 26/04/2021 10:24 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@judas

Nice! Thanks for the file, will try some lower Z values tomorrow, after some more  Zzzzz 🙂 

Posted : 26/04/2021 10:26 pm
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

After tweaking with the Z value, and added 5 degrees to the printing, it prints nice for 4-5 hours, before it suddenly clogs.

I'll try changing to a 0.6mm nozzle, to see of it persist there.
I'm investigating what it can be now by test printing a benchy.

Posted : 29/04/2021 6:45 am
Clarmrrsn
(@clarmrrsn)
Honorable Member
RE: A lot of problems after changing to 0.6mm nozzle

Have you worked through this document.

Not sure if anything helpfull, but worth a read.

https://help.prusa3d.com/en/article/clogged-nozzle-hotend-mini_112011

Tank you very much!...
Posted : 29/04/2021 8:02 am
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

I'm starting a new thread. I think this was solved with: 
 - Lower Z-axis
 - Adding bondtech G-code to PrusaSplicer
 - heatbreak was mounted too loose, so nozzle did touch heater. Now has 0.5mm gap, as needed.

Now it prints flawless untill it clogs, so I though about making a new post, and linking to this for history.

Thanks so much @judas and @clarmrrsn !

Posted : 29/04/2021 8:25 am
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

@clarmrrsn

Yeah, twice. No residue from cold pull or peeking. It all looks fine 🙁 
It just suddenly fails after 30 min, 5 hours. Quite randomly. So most likely a heater/nozzle problem.

Will try new nozzle now, so I've changed alle the components.

I've removed the filament sensor and changed all the tubes, but no avail 🙁

Posted : 29/04/2021 8:28 am
trondkla
(@trondkla)
Eminent Member
Topic starter answered:
RE: A lot of problems after changing to 0.6mm nozzle

I'll change the nozzle to a new one, and try recompressing the bowdn tube 🙂
I think it must be a build up, or something, can't see what else it can be.

Posted : 29/04/2021 8:29 am
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