Core One ASA issues
Hello,
I have a pre-assembled Core One with the latest firmware, a buddy camera, and a wiper nozzle setup. Last week, I started experimenting with ASA printing after primarily using PLA. I'm currently trying to print sections of a drybox for the side spool assembly area.
A couple of days ago, I ran into the dreaded spaghetti mess, which I initially thought was due to warping and layer lifting. I was using the Prusament ASA profile but have since adjusted it to maintain a minimum chamber temperature of 50-55°C, a bed temperature of 110°C, and either no fan or a fan speed of 0-10%. I always use a brim for better adhesion.
During my second attempt with these modified settings, everything was going smoothly until I noticed a louder sound when the extruder moved to the back wall of the enclosure. It printed well until it reached the same layer height as the first failed print. Suddenly, I heard squealing and grinding noises, and the extruder moved away from the print to the center, causing another spaghetti mess while printing in mid-air. When I stopped the print, the extruder home position emitted the same sounds.
I’m trying to troubleshoot the issue, unsure if I need to slow down the speeds or if something else is wrong.
When powered off, I can move the extruder back and forth without any issues or grinding. Even when powered on, I tested the control feature to move the extruder in the X/Y/Z directions, and everything seems fine.
Has anyone else experienced similar failures when printing with ASA? What’s the best way to resolve this issue?
I plan to run a calibration cube test and perhaps clean and re-lubricate the rails to see if that helps.
Thanks in advance for any assistance!
RE: Core One ASA issues
From the description it sounds your nozzle is hitting something in the model. Is there evidence of warping on the bottom layer? Also, you made a few changes to your settings, I hope one of them was to fix the insanity of the default to grid infill and instead use cubic or gyroid? Of course I can't be sure that's what's causing it but the default grid creates increasingly larger accumulations at the intersections of infill line until the nozzle hits them. But hey, it makes for faster prints, and being fast is all that counts, right? On that sour note, don't use any of the Fast profiles. I do a lot of ASA, and it's almost always the default Structural profile with infill changed to cubic.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Core One ASA issues
ASA is has been an interesting filament to figure out for me too! I had a failed print with loud noises once. The part moved slightly and it went downhill in a hurry from there. I've tweaked the settings described by @FoxRun3D and prints have improved. I was not aware that Fast profiles are a no-no; need to makes ure not to select them.
Also, I realize this is just my opinion and opinions vary... I have not tried Prusament ASA but I have used Polymaker ASA as well as Overture ASA. In my setup, the Polymaker worked a bit better than the Overture. Again, this is my experience. But something to think about.
RE: Core One ASA issues
Polymaker ASA as well as Overture ASA
I was very much in the Overture camp for a long time (unless I splurged on Galaxy Black or PCCF Prusament) for most filament types, good quality at a reasonable price. More recently, I've become more and more converted to Polymaker. PLA, PETG, ASA, TPU, all print very nicely in my hands with standard PS profiles (sans grid infill, of course).
We live in wonderful times. Most filament brands today produce great outcome with little fuss. Can't even remember the last time I printed a temp tower.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Core One ASA issues
I was very much in the Overture camp for a long time (unless I splurged on Galaxy Black or PCCF Prusament) for most filament types, good quality at a reasonable price. More recently, I've become more and more converted to Polymaker. PLA, PETG, ASA, TPU, all print very nicely in my hands with standard PS profiles (sans grid infill, of course).
My exact experience. I've purchased primarily Overture for a long time, but I've had great results with Polymaker PLA and ASA.
RE: Core One ASA issues
My experience on the CORE one for (Prusament) ASA has been faultless so far. No tweaks, just standard profiles and settings and all printed well.
RE: Core One ASA issues
My experience with ASA and PC Blend is that I get better control from warping using a rigid steel G10 build plate with Nano Polymer Adhesive, a 115° bed and a 60° chamber. The chamber temp is crucial. To get that I had to move the printer inside, cover top with insulation and disable the filtration fan. I can usually get the temp to approach 60°. There is a mod to install convection fans under the print bed. I'm thinking of giving this a try. What I really want is an official actively heated chamber.
RE:
Check whether the umbilical gets jammed against the X-axis motor. Temperature is as high as it gets, so the cable softens and sags.
You'll find that the spot next to the door handle (front right) is worst in terms of cold air circulation. It follows that the back left is the best spot - correct unless it provokes umbilical jamming.
"Fans off", yes. "Brim", also yes if print sheet contact area is significantly smaller than the actual print size. Or it'll warp.
I'm proud owner of and printing 10 spools of the cheapest and the 2nd-cheapest ASA, no issues with either (curiously, preferring the cheapest but different topic).
Speed, don't worry. You can crank up to "11" (well, make that "300 %" from the front panel, whatever - it stays always within machine limits). I've tried with a printer that has Loctite in the right places so I don't worry it'll fall apart. Watching gives a headache but it won't skip steps without running into an obstacle.