revcanon
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Posts posted by revcanon
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I do believe I have some more small things to dial in, but this particular issue does seem to have come down to Retraction Extra Prime amount.
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Switched to .35 line width and I believe I see much improvement in the preview.
Testing on smaller prints, looks like I have the retraction extra prime amount good too as the z seam is looking better.
CE3PRO_Cheer_Megaphone_4_In.3mf
About to try this one.
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I finally found this article describing the same issue I've been struggling with.
While trying to fix this, I have been playing with other's profiles trying to get this one thing fixed and I think other's profiles are causing some additional issues as you described.I'm going to take some time to get my settings back to what was working great except for the under extrusion and try to dial in the Retraction Extra Prime Amount setting.
Meanwhile, I'm going to take some lessons from you on inspecting the preview after slicing. I think I've been taking it for granted that if I don't get an error, then everything is fine.
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I really appreciate the time and energy you have put into helping.
Admittedly, I do not know enough to fully diagnose this, but why would I only see this on the interior wall of the cutter blade if it were happening all over? How can the inside and outside of the handle and outside wall in the same area look fine if it's under extruding? If it isn't happening everywhere, then why would it only happen here?
I'm just so confused by what this is doing.
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Pulled bowden tube again... trimmed it to try to make sure it was flush at the end of it.
Printed a small model.... still obviously under extruding there.
This weekend I believed this to be a heat creep issue, and I have tried to remedy that.But as it is continuing to happen, I am starting to wonder if going with a new all metal hot end and new tubing may be one answer.
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i also tested it with another small model with no lettering on the side.... same outcome
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I actually replaced the nozzle and bowden tube this past weekend in an attempt to resolve this.
I just pulled the bowden tube again and made sure it was seated all the way down.
no change.
I understand your instructions for the 3mf file now....
attached as requested
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I have attached the updated cura profile with the suggestions you made.
I stopped the print early as there was no improvement on the interior wall near the z seam.
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4 hours ago, geert_2 said:
Is this a Z-seam issue? It rather looks like underextrusion to me? Just a guess, I don't know your printer.
Generally, printing slow, in very thin layers, near the lower edge of the temp range (=to prevent overheating and decomposing of the filament, due to sitting in the nozzle for a long time), tends to give the best results, in my experience. Also, in addition to the above suggestions, set all speeds to the same value (inner and outer wall, infill), so that the flow through the nozzle is as constant as possible. Wild speed variations cause wild flow variations, and thus temperature variations, and a lagging in nozzle pressure (=overpressure at the end of a fast traject, and underpressure at the start of it).
Thank you for your response.
I don't believe it is a Z seam issue. I too suspect under extrusion, but it confounds me why it only happens in this area of any print, regardless of where I place the Z seam. I am going to try GregValiant's suggestions, but will adjust the speeds to be more uniform.
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10 hours ago, GregValiant said:
The print head is taking a while to build up pressure to print. Turn off "Retract at Layer Change" and set combing to "None" and see how it goes.
If you load that part in Cura and use "File | Save Project" you can post the 3mf file here. It will contain the part and your printer as well as your settings and is easier to debug.
Starting about this time of year the "cookie cutter" problems start coming in here. Thin walled models have their own set of problems so being able to see the model is a good thing.
Thanks for your input.
I have added the 3mf file to my original post. Just a note: all of my prints are doing this.
I just got home from work. I will print examples with the settings you suggested and post the results. -
Using this attached profile in Cura 4.11.0 with Ender 3 Pro with eSun PLA+ 1.75 mm filament.
It doesn't matter what I try to print, the result is the same.
The handle of my cookie cutter prints fine.
The exterior wall prints fine.
The opposite side from the picture is fine.
The other side of the z seam is fine.
I have changed the nozzle and bowden tube. I have tried multiple profiles, changed retraction settings, temperature, coasting settings, and speed and NOTHING changes the outcome.
No matter what I change or what profile I use, this issue continues to occur only on the interior wall of the cookie cutter and only on the 1.2 mm blade and only to the right of the z seam by about 20 mm.
If I randomize the z seam, then it this issue exists anywhere it placed the z seam in each layer.
Any thing I print comes out this way.
WHAT AM I DOING WRONG?
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No one has anything to offer?
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5 hours ago, NomakeR said:
hey man, if your problem is the z seam being weak, I'd suggest you to choose random z seam alignment.
It's not the z seam itself. It's the intereior wall at the end of the printing as it approaches the z seam. it starts part way through the line and gets worse as it approaches the z seam. I did random z seam and it just deposits this problem randomly throughout the inner wall.
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Printing Cookie Cutters.
Ultimaker Cura 4.11.0
Creality Ender 3 Pro w/ .4 mm nozzle
eSun PLA+ 1.75 mm
Wall thickness is designed at 1.2 mm using Fusion 360.
Initially, I though coasting /coasting volume was the problem, but turning off coasting made no difference.
I noticed that the filament was curling as it exited the hot end, so I cleared it with an acupuncture needle and the curling no longer happens. The severity of the issue seemed to lessen, but was not eliminated completely.The handle of the cutter (bottom 3 mm of the first pic) prints well, but the interior wall of the 1.2mm cutter blade gets thinner as it approaches the Z seam in each layer. The finished product has a visibly thinner wall on the one side of the seam, but only on the inner wall. The outer wall is fine and appears the same on both sides of the seam.
Second pic is backlit so you can see there is a difference in thickness on either side of the seam.
I am not concerned with a visible seam, I am concerned with the wall being weak. As this would be for a cookie cutter, that is very bad.
I have included the stl, gcode, and curaprofile files.
Any help is appreciated.
EDIT: UPDATE: Possible heat creep issue. Replaced bowden tube, found a filament blockage within the hot end. It may be that I'm under extruding at lower pressure due to constricted path for filament. Cleaned up and printing new test now. Looks good so far.....
EDIT 2: 1 print seemed fine, 2nd print began doing it again. How do I solve for this?
Untitled v1.stl CE3PRO_Untitled v1.gcode CookieCutters.curaprofile
I'm losing my mind over this problem with the inner wall of my cookie cutter prints.
in Improve your 3D prints
Posted
I would like to thank you for all the info you provided in this thread. Although you helped me solve the under extrusion after travel issue, one of the biggest things I took away from this thread is learning how to use the Preview in Cura.
I'm sure it's not perfect every time for every situation, but now I can look at the preview and look at a print I'm not happy with and find what's happening. I'm now able to make small adjustments to some of the settings, reslice, and preview to look for differences in areas I'm having issues with. It saves some filament if I can look at a preview and see immediately that it isn't going to behave the way I want it to rather than just printing and hoping after every setting change. I've learned a lot this week, and you've given me some tools to learn and explore more. Thanks!