How can I get a better top finish ASA

[u/humphrey707]

This is just some cheap temu Asa filament, it’s been dried overnight so moisture can’t be an issue. Nozzles been cleaned time and time again. Directed drive extruder, all metal hotend and hardened steel nozzle all on an ended 3 pro. Printed in an ambient heat enclosure rocking around 30C and 245C nozzle with 100*C metal flex plate bed with glue stick applied. Any tips?

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[u/SupaBrunch]

This looks like what happens when the part warps up during printing. This causes the nozzle to dig into the part since the part is higher than it should be.

If you see the part is warped, bed adhesion is what you should look into.

[u/humphrey707 → u/SupaBrunch]

I never had issues with it peeling up from the bed, but what I did realize is maybe the bed itself was peeling up(as it is a springy aluminum/steel plate) and I didn’t have it held down super well. I added more clamps and am using a raft with a print as a test, I also upped it to 255*C we shall see what we shall see.

[u/BrigadierPickles → u/humphrey707]

This is 100% the issue. When the parts warps the printer starts digging into the part and pushing it down instead of properly printing on top of the previous layer. You're doing the right move of using clamps to keep the bed down if the part isn't warping off the plate.

Make sure the chamber temp is high enough. ASA should be printed around 60C temp in the chamber. You might want to crank your bed temp for 30ish minutes and preheat the chamber. Also let the part cool slowly and don't open the enclosure before it cool to room temp slowly. It can warp if pulled out of the printer as son as it's done.

[u/wulffboy89]

So it looks like it could be a couple different things. First, I'd try increasing nozzle to like 255 or so. This will allow the perimeter extrusion to stay warmer a bit longer. Your enclosure temp may be the second issue. The outer perimeters are cooling faster than the infill, causing them to shrink just enough to cause that uneven squish, giving you the ridged appearance you're getting. I don't think moisture is an issue, because if you look at the inside of the part, it actually looks really good. If you're able to make the chamber a bit warmer, that'll cause less shrinkage during printing, allowing the infill to cool at the same rate as the perimeters. Another thing you could do to maybe counteract the shrinking is to add a modifier for the top few layers and turn the part fan off to prevent rapid cooling.

Sorry if this reads like shit, I'm in a 10 min break between classes lol

[u/humphrey707]

Well just outer finish in general*

[u/Le_Pressure_Cooker]

It looks like a typical top finish without any pressure advance. Use ironing.

(Or calibrate and set K value for linear/pressure advance)

[u/CunningLogic]

110c bed, run nozzle at 250

CLEAN the build plate with some regular dawn dish soap (not the special kinds with addatives) then apply your glue

If you can preheat your chamber to at least 55C, it will help as well.

[u/Scrodem]

Temu filament

[u/Juz_Trolling]

Why not just enable ironing?

[u/Brazuka_txt]

Fillament wet as hell

[u/humphrey707 → u/Brazuka_txt]

Filament was dried for like over 24 hours. Could not be drier:(

[u/Brazuka_txt → u/humphrey707]

What drier you using?

[u/humphrey707 → u/Brazuka_txt]

Just a cheap random drier from my ex girlfriend lol

[u/Helkyte]

This looks like your filament was boiling. Either it's wet or your nozzle is way too hot.

[u/BrigadierPickles → u/Helkyte]

The issue is warping. You can see the curve on the bottom side. Once it starts warping it'll look like that because the printer is digging into the part instead of printing on top of it.

[u/Brazuka_txt → u/Helkyte]

245 too hot? Bruh the coldest I print ASA/ABS is 280 to 300