Print head knock prints, fail another and makes a clicking sound
Hi,
Disclamer I’m a complete noob.
So recently my A1 started acting up. This week it has knock down two prints and printed another with horrible quality. Now I noticed that it makes a clicking sound (see video) which seems to come from the extruder. That being said, print quality seems ok (appart from one print see the picture in the comments). I only use PLA from bambu labs and I don’t mess around with settings I usually just pick a project and print it.
That being said, it as rained alot recently and my appartement is very humid (60-70%) so could it be that ? (I have no dryer only the AMS)
I saw some post on the bambu forum and reddit about the clicking and alot of people said it was a clogged of something like that so I did two cold pulls but nothing. Appart from these issues the printer works fine thats why I wonder if it is a normal sound and I just happened to notice it now…
Thank you for your time and I’m sorry for my english its not my native language
At a guess, from your symptom description, there are a number of things:
Wet filament: You can ise the heat bed to dry spools. Setting the heat bed temp, placing a spool under a cardboard lid, flipping the spool after half the recommended time,… works on any printer. Filament Drying Recommendations | Bambu Lab Wiki
Print head collision: Probably due to warping, curling or infill choice in combination with moist filament, drafts and/or a cold print environment
=> Use dry filament in a warmish, draft free environment and avoid crossing infill like grid. Slowing the print and/or lowering layer height can help but is usually not needed with PLA
If the print pictured was post-collision: Is the nozzle still straight?
I’ll try too dry them ! I thought that PLA wasn’t affected as much…
I’ll try to change the infill. But isn’t that based on the model of the project ? Also, I’m under the impression (no pun intended) that the nozzle is touching the print slightly is this a thing or not really ?
The picture isn’t when the collosions occured. But Nozzel seems straight to me. As for the clogging the cold pull should have clear it no ?
PLA is less prone to moisture effects. But it can still ruin prints.
Infill is based on the print profile. Unfortunately, the default for sparse infill is still grid which is known to be sub-optimal.
There are other possible reasons though. Warping, Curling or, A1 specific, screws in the printhead being loose. In the latter case, it is an easy fix to retighten them.
A cold pull can be unsuccessful. If you have the impression that the nozzle is clogged, a successful cold pull should pull out the gunk, i.e. you should see it at the tip of the removed filament.
But there are similar defects with different root causes. Heat creep for example would be gone after a cold pull without showing debris. Extruder contamination on the other hand would lead to a renewed nozzle clog.
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Edit: Addendum: You may want to have look at step two in the wiki just in case
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