SuperTack & 0.2 nozzle issue

Bambu Filament and Accesories Accesories
1

Hello,

I wanted to print this model using the 0.2 nozzle but unfortunately I’ve had to cancel the print twice now (well technically 3 times since it also failed on my Textured PEI plate).

Printed using an A1 with dried Bambu PLA Matte filament and using the 0.2 0.08mm High Quality preset with slowed down initial layer speeds (35 mm/s) and infill (75 mm/s), per the designer’s instructions. I was using the default K value of 0.020 (it somehow wasn’t able to auto calibrate this filament, it had no issue with the other spools loaded on the AMS: 2x PLA Metal and 1 PLA Matte).

For some reason I get these weird lines and artefacts on the first layer. And before you ask, yes I did wash it using hot water and dish soap (today even).

IMG_0124
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It also seems that the nozzle is picking up loose debris leading to a clogged nozzle (it continued air printing for a while). I have not yet tried to print this model using the 0.4 nozzle but I’m not expecting any issues using that one.

After it first failed using the SuperTack I decided to try printing it on the Textured PEI plate and while I didn’t get any clogs or weird first layer artefacts (it was in fact pretty perfect), I did get greeted by this in the morning…

IMG_0121
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As with the SuperTack, I washed this plate today and used the stock Bambu settings for the plate (65°C) and filament.

What other options do I have left to try? Increase the bed temperature even further? Increase the nozzle temperature? It seems like I need two solutions here since I’m dealing with two different problems.

2

Just to note, default K values are based on 0.4mm nozzle use for all filament presets. Nozzle diameter increases and decreases k values required. In my case, it’s a 10 times increase over 0.4mm nozzle pressures in general so when I use a 0.2mm nozzle, I use 0.2 to 0.325 instead of 0.02

Also, pressure advance values will be overwritten unless you uncheck the dynamic calibration box, so if you never unchecked that, any “improvements” were probably imaginary or a fluke of a bambu studio version bug.

I would calibrate flow ratio first, then temp tower via orca, then flow rate. Your adhesion fails are largely when the print head is getting to do a long straight line, and your good adhesion is the slow borders and the deceleration at the stop/start of each long line. That’s definitely a k issue.

Other ways you could attempt to deal with it is lower first layer infil even further.

3

It seems like the actual issue was the toolhead itself being slightly loose. I tightened those screws again, did a full bed calibration and it seems to have solved this issue.

1 Like
4

Awesome! Hm. I guess the deceleration would level off the nozzle and when it goes fast, it probably tilted? So the faster lines laid down didn’t get fully squished into the bed.