0.2 nozzle Miniatures Issue

Bambu Lab A1 Series Bambu Lab A1 mini
1

Hello everyone,
and thank you in advance to anyone who replies! I’ve recently started getting into 3D printing and I’m the owner of a BambuLab A1 Mini + AMS Lite. After printing some fairly “simple” things and gaining a bit of experience, I decided to try something different. I’m a passionate D&D player, and I’d love to bring some highly detailed miniatures to our evening sessions.

I started searching for some models and, after a few (many) failures, I’ve hit a dead end. I’d like to print highly detailed miniatures, so print time is not a concern. I’m using a 0.2 mm nozzle and printing with 0.06 mm layers (I tried 0.04, but it’s really pushing the limits and I had to give up right away).

I’m having a lot of trouble printing the current miniature (it’s a free STL you can find on Cults3D https://cults3d.com/en/3d-model/game/izek ).
I’m using Bambu PLA Basic as the main material, and Bambu Support for PLA (also known as Support W) as the interface between the model and the supports.

I’m experiencing a lot of stringing, especially when switching to the support filament—even though I’ve significantly reduced the print speeds.
Also, with this miniature, I have another issue: an excessive number of supports are being generated, and they cause many problems during printing and removal.

Note: when slicing, if I use thin tree, hybrid, or organic support types, the slicer often crashes or freezes at 80%, and there’s no way to use those options—has anyone else experienced this?

I’ve really spent a lot of time studying the settings, but I just can’t figure it out.
I’m attaching screenshots of my settings.

I’d truly appreciate help from anyone with more experience in this field!
Thank you very much!

Quality_1
Quality_1401×640 48.8 KB

Quality_2
Quality_2380×638 49.3 KB

Quality_3
Quality_3376×654 53.9 KB

Quality_4
Quality_4366×639 53.8 KB

Quality_5
Quality_5373×630 49.4 KB

Speed_1
Speed_1333×578 42.1 KB

Speed_2
Speed_2409×646 49.4 KB

Speed_3
Speed_3359×633 42 KB

Strenght_1
Strenght_1401×650 58 KB

Strenght_2
Strenght_2390×638 53.8 KB

Support_1
Support_1394×650 51.5 KB

Support_2
Support_3
Support_3378×626 56.1 KB

2

Did you make sure that the filament was dry?

3

yes. used for “bigger” models with no issue ;(

1 Like
4

Have you tried printing a draft with a 0.4mm nozzle? A lot of people have been reporting problems with the 0.2mm nozzle.

5
  1. Don’t use auto flow calibration, do your manual flow calibration and this is very important for 0.2mm nozzle. You might get a K value that is 10 times bigger than what was suggested from Bambu (because the bambu default value was set for 0.4mm nozzle, and its auto flow calibration don’t really work well with 0.2mm nozzles). I think your problem might actually come from this.
  2. Does your first layer work fine? Does it bubble up/wave up? If it does, and you have done your bed mesh calibration, then it’s probably because your hotend jacket is loose.
  3. And yes dry your filament.
3 Likes
6

Perhaps it was dry enough to print larger models, but not dry enough for smaller ones. With larger prints, relatively minor issues can often be compensated for, but at a miniature scale, those small problems accumulate. Since they occupy a proportionally larger volume of the print, the result can be disastrous.

1 Like
7

Yes, with 0.2mm nozzle all defects would be multiplied, making it really hard to print :stuck_out_tongue: but also kinda rewarding to solve issues

1 Like
8

Edit: i did some manual calibration, and i ended up with:

Retraction Leght: 0,5
Z-Hop Height : 0.4
Z-Hop Type : Spiral
Temperature : 220
Flow Ratio : 0.98
Presure Advance : 0.016

I’ll start to print another mini, and i’ll post the results ASAP. Ty all.

1 Like
9

Did this solve your issues? I’m having the exact same problem.