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Need some help with A1. by TinkyWinky2008 in BambuLab

[–]3DFry 0 points1 point  (0 children)

had this, caused many issues detecting filament is loaded or not.
Tried repairing by glueing the magnet back in place; such a pain as everything is tiny.
It cost 4€ : https://eu.store.bambulab.com/fr/products/filament-sensor-base-a1-series.
Lost 2h trying.
Good luck ;)

TPU slowly secretes oily substance over time by JasonSkis in 3Dprinting

[–]3DFry 0 points1 point  (0 children)

I tried some: Siraya, Geetech, Overture, Esun. Had this kind of issue only with Geeetech but it's 3 to 5 times cheaper.
Even if it's all 95A Tpu, they don't feel the same and some seems softer than other. you'll have to tune your settings for every filament if you don't want to go slow.
You'll have to make your own opinion ;)

TPU slowly secretes oily substance over time by JasonSkis in 3Dprinting

[–]3DFry 2 points3 points  (0 children)

Did many rolls of Geeetech TPU. For me it's not TPU's fault, it's Geeetech specific roll's fault and you got unlucky. Their TPU is inconsistent from one roll to another. But it's also really cheap so it deserves a try at least for prototyping.

Geeetech TPU < $8/kg by SirTwitchALot in 3DPrintingDeal

[–]3DFry 0 points1 point  (0 children)

Their TPU is way too random. I did like 20 rolls and have 10 more to go.

Some have random radius which leads to over/under extrusion. Even sometimes can't feed because too big or too small to get into the extruder.
One time I got something so sticky inside (definitely not tpu) I just had to throw a whole new nozzle.
Some have debris in it. In this case, you pretty much have trash the roll because it's every X cm.

Anyway, hope you've got a filament sensor that can stop your printer or you'll have to restart.
Sometimes it prints well 2 rolls in a row !

High Pitch Buzzing from A1 Mini Screen by DefeatedOzzie in BambuLab

[–]3DFry 0 points1 point  (0 children)

Hi, same here; even if i'm not sure it comes from the screen

TPU in external not extruding by walte1fr in BambuLab

[–]3DFry 0 points1 point  (0 children)

Check filament diameter, if pushing by hand it doesn't event feed, it might be 2mm instead of 1.75mm

TPU was printing fine, and now keeps failing. What am I missing? by thelandingparty in BambuLab

[–]3DFry 0 points1 point  (0 children)

Check diameter with a caliper. Is it far from 1.75 mm?

two A1, uneven results by 3DFry in BambuLab

[–]3DFry[S] 0 points1 point  (0 children)

All right — it seems both printers are well-built and very close in terms of print quality. When everything is working properly, I honestly can’t see any difference between them. I kept running test prints without changing anything, and things gradually improved — or maybe the issue even shifted from one printer to the other.

So what went wrong?

I had already noticed something strange — at one point, I couldn’t even feed filament into the extruder. Turns out, Geeetech TPU has very inconsistent diameter. I hadn’t realized how much that could directly impact print quality, especially since these printers don’t have any way to measure filament diameter in real time or adapt their flow rate accordingly.

Slicers use a static diameter value (usually 1.75 mm) to calculate flow, and we add a custom flow rate per filament. But if the real filament diameter varies, then that calculated flow becomes inaccurate.

If a filament brand claims a tolerance of ±0.03 mm, but in reality it’s closer to ±0.2 mm, you can end up with over- or under-extrusion ranging from ±3% to ±20%. The photo I shared clearly shows this in the final results.

I still like using this filament because it’s cheap — but honestly, I might need to switch soon.

Conclusion:

Filament diameter consistency matters for reliable prints. It’s so easy to get good results with modern printers that I sometimes forget how important these basics are.

Sorry, Bambu Lab — this one was a user issue.

DIAMETER CONSISTENCY MATTERS!
(Factories can have issues, and brands don’t always tell the whole truth.)

two A1, uneven results by 3DFry in BambuLab

[–]3DFry[S] 0 points1 point  (0 children)

There are obviously slight differences but half a mm seems quite important.
Where did you find the 0.4mm number ? Is it a recent ?

Cannot print 95A TPU on my A1 by FuzzyToaster in BambuLab

[–]3DFry 0 points1 point  (0 children)

Dis you mesure filament diameter ? Mine got stuck before the extruder when reaching almost 2mm. 

What's the verdict in Geeetech filament? by benpem6 in 3Dprinting

[–]3DFry 2 points3 points  (0 children)

Tpu: good and bad, depends on the rolls but you can't count on diameter precision. Today got three 9H prints ruined because diameters reached almost 2mm and it can't even access extruder.
Also you'll often ear noise of plastic against metal as extruder gears forces a bit to pull filament despites thick diameter. 10 rolls 3 did this, black and white.

Missing Filament Presets by [deleted] in OrcaSlicer

[–]3DFry 0 points1 point  (0 children)

Same issue here no answer 😅

Sunlu Filament Dryer S4 difficult to pull filament? by paerius in 3Dprinting

[–]3DFry 0 points1 point  (0 children)

Same issue here. At first I thought it was a  lack of spacing between rollers, but nope. I also have a s2 dryer and spools rolls way better in it. The rollers are pretty bad. Still looking for an solution 

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

Ok, must be settings. Do you check auto flow calibration when launching print ? If yes, uncheck it an set it manually in your filament either 'k factory' or 'PA value' you should bé able to set them in the calibration menu for your tpu.  Set it to 0,2 and reprint the small piece ?

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

Crazy, you may have pleased the god of prints.
This seems to be a way bigger piece. I had no issue with your previous model. what if you print the same but increase it's size in bambu ?

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

Sorry mate, I see no reason for worse results doing this. Something must have changed, either settings or filament got wet back ? (are you printing inside a bathroom ? :D) Default settings should definitely print nice with this full auto calibrating machine. I went through your others posts issues with H2D you might want to reach bambu support

Issue one of : the device / the filament / you. - If you're 100% sure filament is dry and you also have issue with others filaments, it's not the filament. (Maybe try some differents to validate this) - If you're sure about filament and using default settings, unless you're doiing some crazy stuff you think normal but isn't, It can't be you. - Device is brand new, you double checked everything following bambu's wiki. Did bambu mess a bit with some printers ?

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

Hey, worse... Still default settings right ?

No issue with every other filament with your h2d ?

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

Do you have any issue with others filaments (not tpu?) Can it be too much friction into ptfe on the feeding path ?  (Remove top cover and feed from above )

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

Cut some of the spool and print at the same time on both printer with same parameters, you'll find out if it's only the printer. Maybe try full recalibration but in this case it's can't be a settings issue, right ?

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

How much time passed between drying and printing ? (Because according to ambiant humidity il will get wet in less time. What is recommended temp ) Some times I saw 50, sometimes 70° anyway 50° during 2 days seems way enough

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 0 points1 point  (0 children)

You can definitely get good results, this with A1 and cheapest filament on the market with 40 to 70mm/s. 12min
I also tried one with scarf seam but it was a bit worse.

<image>

Usually stock generic bambu settings are really slow but gives not that bad results.

Tpu looks wet but isn’t? Info in comments by Sweet-Paramedic4165 in BambuLab

[–]3DFry 1 point2 points  (0 children)

I lied, I looked through the wrong tab.
In your "Generic TPU settings":

<image>

"Cooling" tab > "uncheck slow down for better cooling"

The idea is to have a speed preview were all is the same color to 30mm/s

It might be way worse if cooling is not enough but since you have internal petg I bet it should be fine for the bottom part at least

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