massive warp printing ASA - Looking for solutions

Hello 3d printer friends,

shortly before christmas, I bought an Anycubic Kobra 2 Pro, and started printing with PLA, without major issues. Now my brother has asked me if I could print him some pieces for an antenna holder (for an electric lawn mover). He designed the pieces, and the prototypes in PLA looked promising. But since the antenna will be outdoors, we decided that PLA won't be a good idea as it is not UV-resistant. After some research we chose "ERYONE ASA" filament.

ASA has so far proven a challenge, as it warps massively. Using a skirt or a small brim, most items were pushed off the printing bed quickly. So far I was only successfull using a raft.

I now tried to print one of the actual pieces, and the print started ok. But after the raft was finished, the edges (especially the forward left corner) started warping more and more. The print finished successfully, but the base of the piece is noticably compressed.

I have a feeling that this might be an bed-adhesion issue. What can I do to improve the bed adhesion or keep the raft from warping that massively? I don't have an printer enclosure to keep the temperature constant. And I do have a glue stick, but wanted to get some opinions first, as I'm hesitant to potentially ruin the plate with glue.

Any ideas and suggestions are appreciated.

Printer: Anycubic Kobra 2 Pro
Bed: regular PEI spring steel
Filament: ERYONE ASA, 1,75mm
Printing speed: 50mm
Printing temperature: 240° C / 464° F
Bed temperatur: 90° C

Enclosed printing space: NO

Warped, left corner. All other corners warp too, but not as heavy.

Compaction of the printed layers

in anycubicby InspectionLate661

100%

11d

10d

Fiskepudding

11d

Glue is fine, just smear it on. But it will probably not solve your issue. The print may stick, but it will still curl and deform and possibly hit the nozzle and get knocked off.

You really need an enclosure. Build a makeshift one from acrylic sheets or some rods and aluminium foil or plastic bags etc.

Also, printing a draft shield may help a little. It's essentially a Skirt with a height that matches your print. It helps by blocking airflow, and it also picks up and radiates some of the heat from the build plate, like a heatsink.

DanielIsla

11d

You need to do or buy an enclosure to keep the area with heat. You can do one using an ikea lack and metacrilate panels, there is plenty of designs of it. You can also print one or buy the ones that are like a mini camping tent, i think anucubic sells one, if not creality does for sure

DanielIsla

11d

As a solution for the moment you can also cover the printer with a carboard box, but dont leave the machine unnatended in that case we dont want a fire

PoisonerKappa

11d

Temperature bed?, i use 100C and a lot of glue stick in bed, and without enclosure, prints good. Temp print 240 C same and just the tipical settings tunning flow rate, retractions, linear/pressure advance, I set my volumetric speed with a similar speed of your 500mm/s

PoisonerKappa

11d

50mm/s

frumpyandy

chiming in to say that I started messing with ASA recently and couldn't get anything to stick to the bed properly without peeling up at the edges like you're experiencing until I turned off my cooling fan entirely (except for bridges). i was nervous about damaging my printer, but I made it about 10 hours into a 12 hour print (250mm tall) before it came off the bed (I think due to a temperature drop and humidity from a big rain storm), and the bottom wasn't warped like i had been experiencing previously, and the printer seems fine so far.