Prusa parts and ASA  

RE: Prusa parts and ASA

@neroes

Thank you very much!

RE: Prusa parts and ASA

Posted by: @neroes

Hi

i saw that ASA is recommended for things such as the fan shroud, which got me thinking would it be a plus to print everything in ASA since it is a tad bid lighter? or does ASA have some other problems that would make this a bad idea?

thanks

Neroes

The parts are designed for petg, with the exception of the fan shroud, I think they print that in pc or pc abs. I've used pc on my mk3/s/partial + for years

I had a thread probably 2-3 years ago about shroud drooping and using pc, not long after, I'm pretty sure they changed to pc for the shrouds. I've never had a pc shroud sag, but they do crack seemingly each time you rebuild the extruder. Pc can withstand higher heat than the bed can generate without deformity. 

RE: Prusa parts and ASA

I just replaced my fan duct with an ABS version, it printed perfectly, we'll see how it holds up.

RE: Prusa parts and ASA

@swiss_cheese

It will hold up well unless you are printing PC Blend or hotter filaments.  

RE: Prusa parts and ASA

@Charles

PC blend is what finally did the original fan duct in, after 4 years though.

The Fan shroud is dead, long live The Fan shroud!

Swiss_Cheese

RE: Prusa parts and ASA

@swiss_cheese

Same here.  Mine lasted 4 months in PC Blend and warps with gravity.  The one I printed with white ASA is kicking after 3.  

RE: Prusa parts and ASA

Posted by: @cwbullet

@swiss_cheese

Same here.  Mine lasted 4 months in PC Blend and warps with gravity.  The one I printed with white ASA is kicking after 3.  

 have tried printing some ASA stuff, and i can already see it deforming a bit, i was tinking maybe i should try the new carbon PC for the fanshroud

RE: Prusa parts and ASA

My PC Blend shroud is about a year old and still holding strong, after many ABS (as well as PLA and PETg) prints.

RE: Prusa parts and ASA

@neroes

It does sound like something appropriate. 

RE: Prusa parts and ASA

@jsw

unless you are printing in an enclosure your pc blend should never deform, it has a higher glass transition point  (130 or more C) than the heatbed can get to (122)

RE: Prusa parts and ASA

@jsw

What color?  Urban Grey did not last about about 2-3 months.  

RE: Prusa parts and ASA

Black, from Prusa.

And, I normally print in the enclosure except when doing multi-color with the MMU and I set the printer up on the floor of the spare bedroom.

RE: Prusa parts and ASA

@jsw

so unrelated but seeing as i have gotten my answer, why not have the enclosure be compatible with mmu?

RE: Prusa parts and ASA

It's not that the enclosure, per se, is incompatible with the MMU2S, it's that my particular setup, which will be difficult to change, makes it a pain.

For the few prints I run with the MMU, I find it less time-consuming and easier to simply lift off the enclosure and relocate the machine temporarily than to futz around with loading filaments via the buffer and into the enclosure.

For me, it works better placing it out in the middle of open floor space and using the floor space behind the machine as a quasi-buffer.

RE: Prusa parts and ASA

@cwbullet

Sorry it's taken a long time to reply.

Actually Greentec Pro and Greentec Pro Carbon have much better thermal stability than ASA.

ASA
HDT 92°C - 99°C
VST: 90°C - 96°C

Greentec Pro (Greentec Pro Carbon)
HDT 115°C (115°C)
VST: 160°C (165°C)

The Greentec Pros and ASA are both UV stable, so no difference there either.

Pure PC (but not necessarily PC Blends) are definitely superior in thermal performance but are a LOT more tricky to print.  PC Blends are a lot less predictable as it depend on the other polymer(s) and the precise composition ratio(s) (these are not commonly stated).