So I’ve printed a model 14 odd times in black ASA from Bambu.
Last night changed the spool to grey as I ran out of black.
Adhesion to plate is bad and comes off then spaghetti.
Printing with stock standard 0.24 Draft mode, door closed.
Have tried to clean plate with warm soapy water.
Have a second brand new PEI gold plate I tried on too same issue
tried raising temp from default 90 to 95.
Temp in room the printer is in is the same as its been all week so no change to ambient temp.
First layer look good, then as print gets to about layer 20+, it starts bending off the board, over time it releases and then spaghetti
And now its doing it in the centre too
Only thing that has changed is going from black to grey, do colors make a difference in settings?
White is known to have issues because there needs to be a lot of additives to make white filament. I don’t know about grey specifically but colour does make some difference.
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ASA and ABS are very finnicky filaments when it comes to warping forces. Anything that tall (and dense) in those two materials will need some attention. As far as keeping it stuck to the plate, glue is likely going to be needed. With small prints, I can get away with no glue, most times, but as the density of the plastic goes up (higher infill or large number of walls), the warping forces go through the roof.
As for the mid layer heights, that’s an issue with the layers cooling too fast. Do you have the fan cranked up? Or did you open the door or top glass during the print? If you can keep the chamber nice and toasty from start to finish you may be ok.
Just remember these basics, warping is simply a case of the plastic cooling at a rate that is too different from the plastic or bed around it. As plastic cools it contracts (or warps). Also the temp differentials though out the print have the ability separate or warp when they are introduced to cooler temps (like a breeze from an open door). Another rule of thumb to know is, the denser the plastic is packed on, the greater the forces that are pulling and warping will be. So tricks like less infill strategically placed can help too.
Ideally, you would set the chamber temp to 100C (that’s the Tg or Glass Transition temp for ABS/ASA - effectively the point when the plastic gets reasonably soft from being hard) and call it a day. Keeping the chamber at the filament’s Tg effectively ensures no warping. But our printers can’t do that. So you have to mimic that idea as close as the printer allows. So for most of us, that means getting the chamber up around 45-50C and not letting the air get vented through the machine.
Thanking you. I will keep an eye on things, for now I’m at the airport going on holiday for a month and will just print PLA items having my friend/house sitter clearing the bed each day.
This is the item I was printing in ASA, I printed around 12 of them no issues over the last 7 days, but then since running out of 2 spools of ASA black changed to grey and it failed 4 times.
I just used stock standard settings for all of them, just in draft mode. No doors opened, no fans, temp of room etc has been variable for the last week, I.e. day time prints and night time with no issues, just since this grey ASA.
Will wait for more spools to arrive and then test again to see if it’s maybe the filament was contaminated or something.
