iccherry
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Posts posted by iccherry
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1 hour ago, UlrichC-DE said:
Yes ASA is a devil's stuff and the printcore is history.
For the ASA on the flap, a pair of pliers and a hot air dryer will help. I would try to exert as little force on the flap as possible. If the something is bent, the closing of the flap no longer works.
I would put the plate in a vise. Then I would use a hot air gun to heat the plate and pull out the print core at the same time.Wish you much success and also some luck!
Thanks! I was able to get it out with a vise. The printcore is indeed ruined, as is the capacitive sensor. Looks like I'm in for about $250 worth of replacement parts, but the other printcore and the rest of the head was undamaged, thankfully.
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Along with the bottom end of the head unit. Printing ASA, and lost bed adhesion. Melted filament got pushed up into the silicone shield, pushed it out of the way, and encased the hotend. Had to take the whole head assembly apart to get it out, which also required destroying some sensor wires (encased in ASA). I cannot get the hotend out of the metal bottom plate. Does anyone have any ideas on what I might try?
I guess I should write off the hotend, and just cut it out or something? Or maybe put it in the oven to heat up the ASA and pull it out with pliers?
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On 10/31/2021 at 9:55 AM, CarloK said:
@iccherry As you can read in this thread, there are two way to connect your printer to Cura: over the Cloud (Digital Factory) and over the local network. Synchronizing materials with Cura/Marketplace is only supported when the printer is connected over the local network. The cloud based synchronization is a feature that's currently being worked on for the S-line of printers, for the UM3 the release is not scheduled yet.
So, to add a new material to your UM3, you logout from the Digital Factory in Cura. Ensure your printer can be reached over the local network and material synchronization should happen automatically.
Removing a material from the printer isn't supported. It would be very confusing when multiple people are sharing the same printer and materials would disappear, depending on the most recent user. Removing all added materials can be forced by executing a factory reset on the printer.Thanks for the response. I was connected via the local network as well. Cloud connection to my UM3E has been spotty, so I was not printing via the digital factory. Nevertheless, the materials don't show up.
This is on hold for now though, as I have significant repairs that have to be made to my machine before I can try anything else. Had my worst print failure ever today, and it resulted in some serious damage.
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Just wanted to say I'm also having this problem with Polymaker ASA on a UM3E. I have the material installed on Cura, and in the online Marketplace, but the printer won't update. The printer is also hanging on to some materials that I've deleted, and they keep showing back up even though I uninstall them in Cura or the Marketplace.
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On 6/22/2020 at 2:27 AM, maht said:
Are you able to try this in 4.6.1? Some issues relating to 'ugly prints' have been resolved since 4.3.
Sorry for the necromancy. I just saw this reply. Here's a 25mm cube and a thin wall cylinder (30mm external, 25mm internal, 2.5mm wall) slices and printed at the exact same time. 0.8mm nozzle in ASA with 0.4mm layer heights.
The cylinder walls are still godawful. The cube walls look fine, other than some corner bulge, so it doesn't appear to be a mechanical issue. Note, I do think the internal wall is probably made worse due to the ASA pulling in a bit. It does have that tendency. But even the external Wal finish is much poorer compared to the flat cube walls.
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On 11/22/2019 at 10:57 PM, gr5 said:
But someone has to test all these profiles. I checked the other day and in fact there are only about 225 profiles. But still a lot! and each time you create a new profile for a new printer someone has to test it at ultimaker. And probably (hopefully) they retest it on every upgrade as well.
As for the UMO and UM2 - those printers profiles I believe already use very accurate profiles that also make nice looking prints. They don't need new profiles (I don't think they do). It was the UM3/S3/S5 printers where UM seems to have shifted to nicer looking prints instead of keeping it as accurate prints. Now they have profiles for both "intents". So it would indeed make sense for the UM3 to get these extra profiles. Maybe in the final release, the UM3 will be included.
I get those difficulties. They are legitimate and understandable. And it does seem like they are small profile changes.
I think what I'm worried about is that it seems to communicate that the UM3 (much less the UM2 and past) printers are somewhat being deprecated in the development. The focus is on the S line. When resources are constrained, those printers are going to get the focus from now on.
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5 hours ago, NBull said:
Hi, I agree that the "fast" profile is shit, and I can't really see any use for it. But to be fair there are some significant changes between normal and fast beside the layer height.
"Outer wall speed" goes from 23 mm/s to 50 mm/s
"Inner wall speed" goes from 45 mm/s to 55 mm/s
"Outer wall Acceleration" goes from 500 mm/s to 2000 mm/s"Inner Wall Acceleration" goes from 1000 mm/s to 2000 mm/s
Interesting. I'm using Cura 4.3.0 on an UM3E. As I mentioned, the speeds are different, but my accelerations for both fine and fast profiles are the lower values.
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The only difference I can find in the newest Cura fast (0.2) and normal (0.1) profiles is the layer height, wall overlap, and the speeds. All the accel, jerk, and other settings look identical to me.
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I've had quite a few problems with cylinder walls (have a thread about it) with my UM3E. I never get perfectly smooth results with Cura on them for some reason. Especially small diameter cylinders, like you're looking at.
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3 hours ago, Reywas said:
I've noticed some strange behavior on curves as well. What version of Cura are you running?
Cura 4.3.0 with the most current firmware ( 5.2.11.20190503) on the UM3E.
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1 hour ago, Sunrider said:
Thing is i cant print anything, layer separation is way too high, under extrusion is everywhere, and it just doesnt seem to work
Ill post the gcode in a bit, but the extruder is working and extruding, the wheel that feeds the filament in is the one that is not
Sorry, misinterpreted what you meant by feeder wheel. 🙂
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Can you post the gcode? You might look at the extrusion at those layers, and that can help identify if it's hardware or software that's causing the problem.
I'm also having trouble with thin walls. Might be related.
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Well. This is just frustrating. Eliminating the outer wall wipe and wall overlap seemed to make an incremental improvement, but there are still extrusion issues. Further, it almost seems like Cura is turning the curve into a rougher polygon than Slic3r. The vertical artifacts from the interpolation of the curve seem much larger in the Cura version.
I may just need to open an issue on the Git for this. I am lost for explanations.
For reference, on the left is an earlier Cura print. Middle is the Slic3r print. Right is the new Cura print with 0.333 walls, no overlap compensation or wipe. It looks "ok" in the photo, but again, in person, there are a lot of issues. The layers look like some lines are missing in places.
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Thank you for the feedback. I didn't post up the photos (just to keep clutter down, and they don't show anything new), but I actually tried a couple things to address those issues.
First, I thought, perhaps it's that gap filling and the middle wall causing the issue. So, I reprinted with 0.40 nozzle and default 0.35 line width (stock profile). Then, I set fill small gaps = nowhere, and set infill to concentric, just in case. Result: still the same. The outer wall extrusion gcode still has skips in it, and the print was still rough. The gcode did looks smoother (it was drawing circles), and it wasn't zigzagging in the middle wall, but that didn't matter.
Second, I tested the line thickness. I set the 0.8mm nozzle to 1.0mm line width, which is exactly the width of the wall. Result: still stuttering extrusion. Still an ugly print. Gcode still shows the blips in extrusion. But maybe going over the nozzle size has other problems, so....
I have a print going right now with 0.40 nozzle, 0.333 line width, no gap fill, and concentric everything. The gcode still shows the extrusion stuttering, but that should help determine how much line width matters, as it should just require three equal lines to make the 1mm wall.
/edit/ It's not quite done, but I can see enough of it to say that the line width didn't make a difference. The finish is still rough, with extrusion irregularity. /edit/
/edit2/ I found an issue listing on the Cura github that discusses what appears to be this, but it's unresolved.
https://github.com/Ultimaker/CuraEngine/issues/702
They mention the possibility that it's "outer wall wipe distance" or "wall overlap compensation" causing the problem. I have a model printing with those set to zero/off. I'll have to check it out tonight, but it did look (at a quick glance) like the gcode didn't have the extrusion stuttering. The wall wipe didn't seem to have an impact on the code, but the wall overlap did. It's like the calculation for the required extrusion when compensating for the overlap is a little off or perhaps "mathematically correct" but non-constant, leading to surface irregularity. Hopefully that's it! /edit2/
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Ok, I realize I might be talking to myself here, but I think I'm on to what's actually happening.
With the 0.8mm lines, Cura is stuttering the extrusion. See the green spots? Those are movements with no extrusion.
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Here's the gcode for that section. Note the movements with no E values:
Now, this introduces fairly visible artifacts in the simulated part. See the vertical lines? Those are the corresponding movements with no extrusion:
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The Slic3r gcode exhibits nothing but the seam, and that's the only place it has movements without extrusion. Here, you can see how clean the simulated extrusion is.
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Finally, I checked the other Cura file that I had sliced with 0.40mm lines. Here's what's odd, Cura starts out doing the middle line by tracing the curve... then it switches to trying to do infill with 45 degree lines. And *then* it tries to go back and fill in the gaps. It makes no sense, when it just needs to plot a circular single fill line, but that's what it's doing.
Here, you can see the initial infill is a nice smooth curve. Then it starts to zig zag.
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And here's that same section when it come back and tries to cross hatch/fill it.
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Needless to say, the 3d model of that pattern is as ugly as the actual print.
So.... I have no idea. Cura seems to just slice curves in odd ways. It's not extruding consistently, and it's also inconsistent with how it's handling the infill.
Any thoughts?
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On 9/20/2019 at 6:51 PM, mayo77 said:
I have tried a generic nylon filament in the past and all i wanted to do was rip my hair out because no matter what i used gluestick/ hairspray/ slurry/ brim nothing ever worked and the filament would always curl up and come off the print bed. This would drive me mental.
I basically want something that prints parts to at accuracy of pla but is very ridged and strong (weight bearing), price is not an issue.
I will add I have an olsson ruby , running on an ultimaker 2. So i believe I can print the vast majority of filaments.
I have been looking at xstrand and polycarbonite & carbon fiber but I'm willing to try anything as long as they meet my main requirements.
1) Fairly easy to print, i don't want to have to fight with printing this.
2) much more rigid than pla or abs ( and pla + or tough is NOT strong enough as that's what i regularly use)
3) Little to no flex, but not weak on a drop/ impact.
4) Able to take alot of weight prior to breaking
Any one have any recommendations.
It's all tradeoffs.
If you want something more rigid than PLA, you're going to either have to look at super high end pure thermoplastics (PEEK, PEKK) or fiber reinforcement. People think PLA is low end because it's cheap and easy to print. It's not. PLA is actually one of the strongest, stiffest filaments that is commonly available. The big downside to PLA is that it's not very thermally resistant. It melts at a low temp, and thus can't be used at even moderate temperatures.
The only thing stronger that's reasonable is perhaps PC. But it generally won't be quite as stiff. It's pretty strong at higher temps also, but must be thus printed at higher temps. Nylon can be strong af, but it's also pretty soft and flexible. PEEK and PEKK are amazing, but holy crap expensive and you need an actual oven to print them.
Here is data from 3dxtech (and this will vary from manufacturer to manufacturer) on their filaments. They have a good selection, and while this won't apply to every manufacturer's filaments, it's a good reference for comparison. All numbers are Mpa.
Material Tensile Strength Tensile Modulus (stiffness) Flexural Modulus (stiffness)
PLA 56 2865 3185
ABS 42 1950 1985
PC 62 2410 2200
PETG 51 2218 2380
PEEK 100 3720 2700
PEKK 105 3200 2900
PLA (CF) 48 4950 6320
ABS (CF) 46 5210 5260
PC (CF) 70 6200 5890
Nylon (CF) 63 3800 3750
PETG (CF) 56 5230 5740
PEEK (CF) 105 8100 8300
PEKK (CF) 105 8210 8300
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28 minutes ago, Smithy said:
Of course it makes little sense to print such thin lines with a 0.8 nozzle, you can also change the wall thickness in the model to .8 or 1.6 and then try the 0.8 nozzle. It is important that after slicing you check in the preview whether only one or two lines are really printed, then the result should also be clean. If the slicer then has to print a very thin line in addition, there could be these problems. If there are not exactly 2 lines (at 1.6 wall thickness) then play with the line width, often a reduction to 0.79 or so already helps.
Yes, I originally assumed that was the problem also. I have had this problem across many models with various wall thicknesses (almost exclusively using a 0.40mm nozzle). This is an example to show the problem. Honestly, this is just one of the issues I'm seeing (constant extrusion issues seem to be happening, but again, it seems it's Cura, not my machine).
Printing with a larger nozzle helps to *show* the problem. It is exaggerating it. It is not causing it. I have just finished printing the same stl with a 0.40mm nozzle and the default 0.35mm line width "fast" profile. So, the wall is approximately 3x the line width. It's harder to see the artifacts this way, especially in a photo on the internet, since the features are half as large, but they are still there. And in person, they aren't difficult to see.
Note, the print on the left is the Cura 0.40mm nozzle version. The version on the right is the same one I posted above with 0.80mm nozzle in Prusa Slic3r with the same speeds and temps. Look at the evenness of the lines. The Cura version is quite rough, both inside and outside. There are also some runs in the Cura version layers where there's underextrusion or something.
I've been having a lot of problems lately with surface quality, and I'm just trying to figure out how I can do better. I was worried I had a mechanical issue or something, but I figured I'd try a different slicer, just to rule that out, and here is what I'm seeing.
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5 hours ago, Smithy said:
Just an idea, try to set the line width to 0.50 or 0.49 and check the result in the preview.
When you have a wall thickness of 1mm, 0.8 is hard to print because the printer makes a wall with 0.8 and then he has to print a wall with 0.2 which is hard with a 0.8 nozzle.
you could also try to set the line width to 1.00 or 0.99, should be no problem.
Yes, I'd considered that. However, wouldn't that just get rid of the benefit of using a larger nozzle elsewhere in the model? These cylinders are just simple models to show what I'm seeing in more complicated things. I want to be able to print faster (and I'm willing to sacrifice quality in small details), so I'm using a 0.8mm nozzle. Doesn't narrowing the line width defeat that purpose? I'm not sure if Cura does anything dynamically there, do they? I'm reprinting right now with a 0.40mm nozzle to see if that helps. I'll upload results when it's finished.
Also, the same nozzle, speeds, temps, retraction, etc in Prusa Slic3r produces this (attached). The walls of both prints are just a hair over 1mm thick. It's clearly a slicing issue, as the stl, filament, and machine are the same between these two. I'm including the hacked together gcode for the Slic3r version, for reference.
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Sure. I'll use an even simpler model, as these are just examples. Here's a 40mm cylinder with 1mm thick walls. That's it. Designed in Fusion 360 with two circles and two extrusions.
I used the default 0.40mm "fast" 0.2mm layer height profile with the following two adjustments: 0.80mm line width (because I'm using a 0.8mm nozzle) and I changed the brim to 2mm.
Result: hideous.
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I am constantly struggling with artifacts in my cylinder walls on my UM3. Blobs, zits, random noise. This seems to always happen in the same places if I use the same model to test with, so it's got to be coming via Cura.
I have tweaked retractions, coasting, z-hop, speeds... nothing seems to get nice smooth walls. I've cleaned the extruder. Swapped cores. Cleaned and lubricated every rod, and checked for play. Any ideas? I've tried printing down to 45mm/s at 0.2mm layers, and I feel like I was able to get this quality from much worse printers.
Here is an illustration. The rough print was sliced by Cura. It's the best one I was able to get after tweaks. The smooth print was sliced with Prusa Slic3r (and then I hacked in the start and end code from the Cura file to get it to work). The Cura slice is full of irregularities. The other is incredibly smooth. Same STL. Same filament. Same layer heights. I believe there is a 5 degree difference in print temp, but that isn't driving the result (I've tried it). I do understand it's difficult to tell with this filament, but I've done the best I can with the photos to show what I'm talking about.
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UM3E: Profiles disabled when both extruders enabled, also, bed adhesion extruder cannot be set independently
in UltiMaker Cura
Posted
Is there some way to get Cura to not disable print profiles when both extruders are on? I keep a AA 0.4 and AA 0.8 on my machine, and if I have them both enabled, Cura just doesn't show me any of the preconfigured Ultimaker print profiles. I only get "fast". I don't understand why the print profile would care if the other extruder is enabled. It happens regardless of if I'm actually using the other extruder for a print or not, and that doesn't make any sense.
Also, I tend to use brims on my prints for bed adhesion. If you have two extruders active, and set the brim extruder in settings, it changes the brim extruder for *all* the extruders. Lets say you're printing two bodies, one uses Extruder 1 (E1) and the other uses E2. You can't print the brims on each model with the correct respective extruder. If you set the model that uses E1 to print it's brim with E1, then look at the model that uses E2, it will *also* be set to use E1. And if you change that brim extruder back to E2, it overwrites the other model to now use E2 for it's brim. It's weird.