P2S High Flow .6 quality issues

Bambu Lab P Series Bambu Lab P2S
1

I’m running a Bambu P2S with a 0.6mm hotend/nozzle, printing Bambu PLA Basic at 0.3mm layer height (standard 0.30mm preset as base). Filament case from maker makerworld.

IMG_1202
IMG_12021920×2560 304 KB

IMG_1196
IMG_11961920×2560 252 KB

IMG_1199
IMG_11991920×2560 313 KB

IMG_1207
IMG_12071920×2560 626 KB

Main issues:

• Nozzle dragging/scraping noise on infill during travels (audible clunk/scrape, visible scrape marks in recessed flat areas and some ooze trails on top/rim).

• Increased stringing

• Prints have blobs/zits opposite clip features, but those mostly resolved.

What I’ve already done/fixed:

• Manual flow calibration (flow ratio now 0.98).

• Replaced/trimmed PTFE tube back to full length, lubed motion system and chain.

• Undid some cable chain clips to reduce drag.

• Z-hop enabled at 0.6mm, reduce infill retraction OFF, travel distance threshold 1mm. Tried different infill patterns

• Wipe while retracting ON (wipe distance 1mm), retraction 1mm @ 55mm/s.

• Avoid crossing wall ON, Arachne wall generator, aligned seam + smart scarf.

• Outer/inner walls at 500-600mm/s (stock high), top surface 150mm/s.

• Filament dry, aux fan 100%.

I also had some abysmal gridfinity bins that looked like someone tried to shove them through a paper shredder.

Do the .6 high flow hotends suck or are the profiles just that bad? What’s been your experience? I have yet to get a good print out of it. Using the .24 layer height preset reduces but does not solve the problem. I’m about to lose my mind, I feel like I’m sweeping the ocean.

2

I just started using a 0.6mm High Flow full time about a week ago (150+ prints). The short answer is it seems to depend on the filament. It works great with yellow Bambu Lab PETG HF and black Overture Overture PETG both using the BBL Profile, but my prints looks like your photos when I use silver Inland High Speed PETG+ using either the Generic or BBL profiles. So I suspect the nozzle is fine, it is how well the filament profile matches the filament’s “needs” per se.

I also get the opinion (just a hunch actually) that color has a lot to do with it. The differences between two different colors but otherwise identical filaments (type/brand etc.) are somewhat magnified when using a high flow nozzle.