Support Material for ASA  

RE: Support Material for ASA

PETG as Support interface for ASA works good. You need to have a filament which Temp range is close to ASA to avoid big temp changes.
Also you should set "0" as interface pattern spacing.

I had the most adjustments for the Wipe Tower not to risk of instability in higher layers, here helped to purge more than needed, so the PETG is only in a small portion of the Tower.

RE: Support Material for ASA

I went ahead and did some test prints with PETG and PLA supports. PLA as an interface only with zero spacing.  Both stuck to the ASA too much to remove and were sloppy. ASA supports with 0.2 spacing were much easier to remove.  I may try PETG some spacing just to save a little money on filament but I think it’s not worth using another tool in the print.  At least I learned something today which is always good. 

RE:

I experimented with HIPS / ASA a while back (on the MMU) and it worked well, just came off. Zero contact distance. I can't remember the HIPS brand but it was the cheapest I could get, ASA from Fillamentum. No need to dissolve the HIPS with limonene, but you can in theory (haven't tried). HIPS is cheap so no need for interface layers, and its temps are on the lower end for ASA. Should also work for ABS.

This was only a few prints a few years ago and I don't have notes, so I'm afraid I have no more details to share.

RE:

Hi Scisok, 

a while ago I did some support interface testing, here is the result of my ASA with PETG support, you can see the bottomside, the white box was printed direktly on the buildplate, below black there was a ASA Support with a 3 layer PETG supportinterface, Top Z distance: 0.0, Interface pattern spacing: 0.0.

ASA was cheap noname (Joyyko https://www.amazon.de/dp/B0CTTHQCR1?ref_=pe_27091401_487187591_302_E_DDE_di_1) for the support interface I used this standard eSun PETG filament: https://www.amazon.de/dp/B07FXG88NG/ref=sspa_dk_detail_1?pd_rd_i=B07FXZG996&pd_rd_w=m6UBD&content-id=amzn1.sym.0452e920-730e-4d12-b593-9f09a510b7c1&pf_rd_p=0452e920-730e-4d12-b593-9f09a510b7c1&pf_rd_r=7EAY5TPDG36G6RDZXXBV&pd_rd_wg=Lk9Nn&pd_rd_r=903085c9-2650-4a87-b29d-3459752b9d1a&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&th=1

RE: Support Material for ASA

Hi all,
I tried this again. Fillamentum ASA dark grey and eSUN HIPS natural. HIPS has a wide temperature window at the nozzle and 100-115°C for the bed, so you can match the temperatures with ASA and ABS if you like. As I stated earlier this is feasible to do with the MMU if you have an enclosure. Here I used the XL, textured sheet, with the PR enclosure at around 40°C. Bed 100°C, nozzles for both filaments 260°C, fans off. As you can see from the images this is a detailed complex part with almost no contact surface with the build plate. I used custom supports, which were super lazily designed and could really be better, but I need this part only once.
The inner part just released in one piece after carefully jamming a hobby knife in. I had to brutalize the part on the slope, but could get it off in a minute.
This works really well, except in one place where there was too much horizontal overlap and the HIPS embedded itself in the ASA. I scraped that out, vapour smoothed the ASA. Then metal brush+cordless screwdriver, followed by 180 grid to get the matte finish back. It could be prettier if I invested a bit more work, but where this will sit in my car nobody will notice and personally I don't care.

RE: Support Material for ASA

In case someone is wondering, I just wet-wiped acetone over that part of the print with a paper towel. You can easily remove 0.2mm lines that way if you do it 4-5 times, and the finish is glossy. The pits here were too deep to smooth over where the HIPS had embedded itself, as you can see in the final image.

I'd also like to add that PETG + ASA and PETG + ABS didn't work at all in my tests. I could indeed print two slabs on top of each other as described above, and rip them cleanly apart (with quite a bit of force). But as soon as it gets more involved the materials fuse like crazy. Fillamentum ASA, 3DJake or Fillamentum ABS with 3DJake/Prusa/eSUN PETG supports.

RE: Support Material for ASA

Posted by: @scisok

I print a lot of outdoor items and use ASA a lot.  Has anyone tried PETG supports for ASA prints?  I've been using ASA supports but wonder if I can mix materials like using PETG supports for PLA prints to make them easier to remove.  Perhaps only using PETG as an interface material? I don't think PLA would work with the high bed temperatures needed for ASA but maybe PETG might.

The bed temperature of the support material is not relevant if you don't print it on the bed or only print support interfaces. But chamber temperatures may affect some support materials like PLA. Also different warping of the materials may affect your print.

I have read that PAHT and ASA make good supports to each other. But I didn't try it.

If I where you, I would just try it on smaller objects. I made a small guide of how to setup multimaterial supports . It contains a test file where you can see big errors in only a few minutes.