Can't figure out what's wrong. Very poor print quality.
So using the guides over at Ellis, I have confirmed good layer squish. 100mm extrusion length on point. EM set to 0.92 as per the results from my EM test and the top surface is... Acceptable. The PA test gave me a 0.03 result, same as before. I am printing PLA at a measly 120mm/s, and yet the results are a disaster. My infill is terrible and the exterior is just about as bad. And I am pretty sure the EM is still too high even though when I start going lower, I start to get holes in my top layers with 5 layers. Each at 0.2 by the way, with a 0.4mm nozzle.
So what am I missing?
I completely reset my Superslicer today, so the printer profile.is close to stock and the PLA profile is a slightly modified Generic PLA profile based on the Ellis tests.
80 Replies
And also, my infill seems to have blobs at regular intervals.
conscious-sapphire•2y ago
What temperature?
200. Bed 60. Inside the enclosed Rig. Fan at 100 after 2nd layer.
conscious-sapphire•2y ago
Try maybe some very Generic PLA profile without any adjustments?
I did that right after the reset. The results were pretty similar that I'd say nothing has really changed from then to now.
conscious-sapphire•2y ago
Also, maybe filament is really wet?
No. New spool and it is in the dry box as we speak.
conscious-sapphire•2y ago
Fine with other filaments?
Try maybe 190, I had some spools that printing best below recommended values
Or print temp tower 180-200
Honestly, no. I have had issues with this since the start. But never with PLA or PETG. I struggled with ASA, PC Blend and PC Blend CF. I always assumed it was a filament issue. That I couldn't dial them in. But then some times things were just perfect. For.insyance the attached parts. Then the very next print would be crap. Now back to PLA and I am starting to think maybe the issue is really something with the printer.
Running one as we speak.
Just started.
conscious-sapphire•2y ago
Maybe thermistor reports wrong temps?
I would expect PLA look like this at something like 240
Possible but improbable since I have already replaced hot end, nozzles, thermistors and extruder.
Yeah... I'd expect the same. Although I have printed some PLA at the very start as fast as 220 at 245 degrees I think it was. And those were pretty good.
conscious-sapphire•2y ago
So none of filaments print good?
Maybe clog?
Different nozzles. Tried 0.4, 0.6 and CHT. Now back to stock 0.4 to try from scratch.
absent-sapphire•2y ago
What kind of part cooling fan do you have? 4028? If so, lower the fam speed. for PLA you shouldn't have to go over 30-40%
conscious-sapphire•2y ago
BTW, check filament path, put it directly into extruder without everything
absent-sapphire•2y ago
The 4028 pushes a ton of air. Most generic slicer profiles assume a fairly weak fan
Dual fans.
absent-sapphire•2y ago
I don't have any experience with those, so can't really suggest anything else. Sorry.
conscious-sapphire•2y ago
Based on pictures it is already badly extruded, not sure air flow can do such a damage
absent-sapphire•2y ago
He said fan at 100% after the first layer. That would affect everything visible. It wouldn't hurt to try lowering the fan and see if it improves.
I think they are dual 4020 blowers.
I just manually sent them down to 2 now.
20, sorry.
I'll see if that helps.
conscious-sapphire•2y ago
Really remove filament path out of equation, on the photo above bowden tube bend too much for my taste
absent-sapphire•2y ago
That is actually an interesting question. What kind of tubing is that? The blue make me think Capricorn which has a smaller inside diameter, which can good for those short pieces in the hotend but not for a reverse bowden. You could be causing excessive drag. You want the reverse bowden to have a larger inside diameter. I am using tubing with a 4mm OD/3mm ID.
There's a problem right there. PLA doesn't like enclosure.
Ok. I'll run again with the top up. But then that doesn't address the issues I've had with the other filaments. Not saying that it won't be the case for this one. But as you know, I've always struggled to get decent quality. Hell... You're one of the reasons I've had any success at all.
I also run dual radial fans. 100% after a couple layers
If it weren't for you and some of the guys, I'd have shipped this back almost 6 months ago.
PLA needs as much cooling as it can get
Ok. So top up and blast it after 4 layers.
It's glass transition point is very low
Got it.
What hotend do you have again?
I'll rerun. Mosquito if I am not mistaken. Let me confirm.
Try my profile
https://github.com/jscancella/prusaslicerprofiles
GitHub
GitHub - jscancella/prusaslicerprofiles: profiles for prusa slicer ...
profiles for prusa slicer for my machines. Contribute to jscancella/prusaslicerprofiles development by creating an account on GitHub.
Use the polymaker polylite midnight black
LGX and Mosquito Magnum.
I run a hotend similar to mosquito
Ohhhhh snap! Who's a lucky boy today?
Just got it in today 😬
I have max flow at 12mm/s. With a magnum you might be able to bump it up to 15
Haha nice
Probably have to adjust the pa and em
But mine should get you started
Ahhhh crap! Me and my big mouth.
Just cracked my blower. Hit the tower.
What is that printed out of?
I believe it is resin.
Was installed by the tech.
What?! No, do abs or asa
I have som ASA still
Resin is not a good choice here. Super brittle
But those deformed whenever I printed PC Blend CF.
Asa deformed? That must be some bad asa then
I'll load this in. Need to print the duct.
Damn it.
@Helge Keck spectrum any good for asa?
Just what I didn't need.
idk
never used it
Wait, printing temp 200-240? For asa that seems low. My abs I have to print at 255
No, no.
And bed at 40-90? What???? That's just weird
Ohhh, on the filament.
Yeah.
At least it is what it says.
That "asa" seems more like PLA settings
No wonder it deformed on you
You know a Portuguese guy named Márcio?
I would ask in #filaments for some good asa suggestions. I like my polymaker abs
If I'm being honest, no
Ok. One of the OG Rig users.
He's the one that suggested it. Said he uses it on his rigs.
In any case, it's all I have right now, so I have to load it in.
Either that or I can try to print using PC Blend or PC Blend CF.
Interesting. Well, at least from the package settings and your experience with it... I would use something else
PRUSAMENT
I don't have any experience with those
Ok. So the ASA then.
ASA Loaded.
Anyone know which of these is the right one?
~
Seems the SAFE version is corrupted.
Using the default 3D0 ASA profile, no changes.
Let's see.
Which eva version are you on?
Of SuperSlicer?
EVA version?
No idea what that is.
Eva 2 is what vcore3 came with originally. Eva 3 is the latest. I am guessing you have eva 2. Try https://2.eva-3d.page/addons/layer_cooling/
EVA - Layer Cooling
EVA 2 - 3D printer carriage platform
I think that once I replace the duct i really need to print out a set of replacement parts for everything.
Never can have too many extras!
Man, this print is rough.
there's always #print-services
I print pla in enclosed printers all the time. That is definitely not a problem and definitely not the problem here. I do suspect cooling is an issue but moreso due to the hot end setup - not sure those cooling ducts are getting air anywhere close to where it needs to be.
This is always a good idea... I've found that, over time, pressure creep leads to excessive nod/tilt in the print head - needs to be tightened up periodically (occasionally replaced) and could be contributing to what you are seeing. Having replacements on hand is necessary as, sooner or later, you'll need them.
While you are at it, check your motion system for any binding... Disconnect your belts, make sure the print head moves very, very freely in x & y... I once had some slight binding in y due to misalignment of the gantry plates that resulted in artifacts similar to what you are seeing...