Open Sednav opened 1 year ago
here the error in the Cura view, you can see the 2nd color green is in the air
After some thought, I could just construct a bespoke purge tower easily enough as part of the model, but without painstakingly hacking the G-code, I can't see an efficient way to actually start and finish a new colour ON the prime tower - which is its purpose. If you could just point me in the right direction with that, the problem could easily be solved. (I am printing PLA in both colours, so there is no compatibility issue)
I found that if the purge tower is increased in diameter to 35mm, and wipe toggled on, the dropped strands inside it have more space to settle and don't seem to get dragged out. I had one glob forming inside the tower, which was eventually dragged out, but I was watching at the time, and could pause the print, snip the glob off, and remove it, before resuming the print. Finished print quality was much worse than with using the Creality slicer in rough mode, so I still have to fiddle around with settings for a while.
My ambitious project is a 1:200 scale model of a 98 metre megayacht, printed in 6 individual deck layers, in 2 longitudinal halves each, to fit on the base plate. The model has many windows on each deck module, requiring a nozzle switch on most layers, so I have to get this right. I am currently printing small excerpt parts to test printability. This is anticipated to be a yearlong project
Here is the current result of the test print, mainly to test tower settings, and using a brim instead of a raft. The model is not very high. The overhang support structure is still far too dense. Might have to try trees. Windows are also not well defined, which might need more volume in the purge tower. The Creality slicer used a massive, solid purge tower to get a clearer definition of colours (windows in my case).
Hey @Sednav,
This looks like such an ambitious project 😮
My first instict would be to turn around your hull so it prints the support internally, I expect that you will be looking at the outside of the boat anyways so you want that to look the best!
You can also place a small mesh next to the prime tower if you think tha tyour printjob fail might be related to purging. Something like this:
I think your fail might be related to the fact that your mesh is faulty. Have you tried doing a quick mesh fix with the Meshtools Plugin? You can get it here: https://marketplace.ultimaker.com/app/cura/plugins/fieldofview/MeshTools
Because the model is faulty your support is being printed inside of the model causing a build up of material that is probably causing the fail.
Do you own the CAD model? Would it be possible to alter it to make it solid or at least the walls thicker? Could you check the export settings of your CAD software to make sure that the walls are watertight? If you print with these thinner walls I really suggest to look into the specific Arachne Engine settings that we introduced in Cura 5.0. You can read more about them here: https://support.ultimaker.com/hc/en-us/articles/4792077687068
If you want try it with tree support, you can try to use the newly released Alpa with a new version of tree support. you can download it here. https://github.com/Ultimaker/Cura/releases/tag/5.3.0-alpha%2Bxmas
To me, it doesn't seem like a bug in Ultimaker Cura, since the mesh is faulty and Cura is not built to alter meshes in this way, that's what CAD software is for. Would you still like to keep this bug open or do you agree that we can close it?
Hi MariMakes, Thank you for your comprehensive response. It is very much appreciated. I will respond to your questions and recommendations in sequence:
Thank you again MariMakes, for your comprehensive help. This has set me on the right path for this year-long, challenging project. Best Regards, Merry Christmas and Happy New Year, and may all your hopes and dreams come true.
HI MariMakes,
Latest update:
Looking forward to your solution. Cheers, Sednav.
Hey @Sednav,
Thanks for the updates. I'm happy to see you are making so much progress.
You can alter the layer start settings to change the order in which the models are printed so you can do the Purge tower first.
I changed the status of the ticket from a bug to a discussion so other people can help you in your journey. Since this is a place where we track bugs and feature requests.
You can also consider starting to post your findings on https://community.ultimaker.com/ where even more people can help you on your 3D printing journey.
Thank you MariMakes
That works in the animation, so I'll try it in the modal as well now. I will start posting in the Community next time.
Merry Christmas.
Application Version
5.2.1
Platform
Windows 11
Printer
Creality CR-X
Reproduction steps
Actual results
Expected results
I expected the clear and white colours to print side-by-side, according to the model designations. The purge tower was meant to keep each colour clean without streaking and colour bleeds. It didn't get that far because of the unsupported layers and subsequent purge tower fail.
I had printed part of this 2-colour model reasonably successfully using the Creality slicer (apparently an early Cura edition), in rough, fast preliminary mode, and wanted a more accurate print with Cura.
CCRX_04_08_BCHBB_05.zip
Checklist of files to include
Additional information & file uploads
I did a Google search for this problem and found the following links, but without an actual solution:
https://github.com/Ultimaker/Cura/issues/6909
https://www.google.com/search?q=cura+prime+tower+colors+stacked&tbm=isch&ved=2ahUKEwiKwoCMuYf8AhXjhNgFHRlgChcQ2-cCegQIABAA&oq=cura+prime+tower+colors+stacked&gs_lcp=CgNpbWcQA1AAWMsmYOYqaAFwAHgAgAGEAogB5BOSAQYwLjE0LjGYAQCgAQGqAQtnd3Mtd2l6LWltZ8ABAQ&sclient=img&ei=rkWhY4qzF-OJ4t4PmcCpuAE&bih=760&biw=1536#imgrc=VcPiyWv8HDHBxM
Please help me get this model printed. Merry Christmas
Cheers, Sednav