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Rippling in nozzle clear  

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Sparky
(@sparky)
Active Member
Rippling in nozzle clear

Hi,

I was wondering if anyone had seen this rippling during the nozzle clearing and knows what is causing it. Of course, normally it's a consistent line. This is generic PLA printed using the standard PLA setting within PrusaSlicer on a reasonably new printing surface.

Posted : 07/03/2021 6:21 pm
Dan Rogers
(@dan-rogers)
Noble Member
RE: Rippling in nozzle clear

check if your gear tension is tight enough on the bondtech gears.  Other possibility is cruft in the gears, gears not seated on shaft correctly (grub screws tightened in proper order?

Posted : 07/03/2021 9:32 pm
Sparky
(@sparky)
Active Member
Topic starter answered:
RE: Rippling in nozzle clear

@dan-rogers

Thanks, i had a look at the tightness of the grub screw and that's as tight as it's reasonable. The tension seemed fine but i tried increasing it anyway and it just seemed to further show the problem

What i have found is that if i let it print, it will print the first layer perfectly but every single layer after that seems to be underextruded. I tried a cold pull to see if there was anything there but that came out perfectly clean.

Posted : 07/03/2021 10:21 pm
Dan Rogers
(@dan-rogers)
Noble Member
RE: Rippling in nozzle clear

think about a cold pull, clean the nozzle with the needle that came with the printer.  The grub screws I was talking about aren't the ones on the belt motors - the ones on the extruder gears.

Posted : 08/03/2021 3:39 pm
Sparky
(@sparky)
Active Member
Topic starter answered:
RE: Rippling in nozzle clear

@dan-rogers

Thanks,

I tried the grub screw on the extruder and also a cold pull, neither of which fixed the problem. What has seemed to fix the problem was using the needle to clear the nozzle, it's all printing fine now. 

Posted : 08/03/2021 3:44 pm
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