burtoogle

Hello @orlin278, could you please attach a project file that has failed. I would like to have a look at the settings. Thanks.

Hi, I would use the user defined z-seam position option and specify x and y values that position the seam in the least visible position on the model. There are other settings that can have an effect on the z-seam visibility. The retraction settings, print outer wall first, coasting (not recommended), wipe outer wall, etc. You will need to play around and find the settings that work best with that printer and filament.

No, keep it set to Marlin. RepRap is now specific to the reprap firmware supported by some controllers (i.e. the Duet).

I do not know how they can claim that. Maybe it does, maybe not.

No need, that's already been done. There's an option called "Print thin walls" that does exactly that. It's been in Cura for some time. However, the current implementation as supplied in Ultimaker's version of Cura is badly flawed. I am working on a new implementation that is currently producing much nicer results for thin walls and also for filling the gaps between walls. Here's an example of its output... It's still a work in progress and I cannot say when (or ever) it will be incorporated into the standard release. If you wish to try it out install one of my recent releases which can be found at https://www.dropbox.com/sh/s43vqzmi4d2bqe2/AAADdYdSu9iwcKa0Knqgurm4a?dl=0

Of course, but that then rather limits what other features the model could have apart from some thin(ish) walls.

Answer to similar question...

Hello @sibianul, I'm just going to answer your first query about the nozzle movement when printing the thin walled square. Cura treats that model as a solid object that has a hole in the middle. OK, so the hole is nearly as big as the outline but that makes no difference, it's still a solid with a hole as far as Cura is concerned. So Cura prints one wall which is the outline of the model and then another wall for the hole (the inside of the square). Because the hole is almost as large as the outline, the two walls are very close together. So close that they overlap. There is a Cura setting called something like Wall Overlap Compensation and when you enable that it reduces the amount of plastic that is extruded when printing a wall that is so close to an existing wall that they overlap. If the outline wall and the hole wall are really close together, the overlap compensation will reduce the flow for the second wall to almost nothing and so it ends up as little blobs which looks crap. There is another setting called something like Minimum Wall Flow that is a min percentage of flow that any wall will have. Walls that have a lower percentage flow than that value will simply be omitted. So.... to get a nicer print, make sure you have the wall overlap compensation enabled and set the minimum flow to something like 20 and your rectangle should print nicely. Hope this helps!

Sorry, no, I don't, but perhaps others on this forum know where useful info can be found.

There's a setting called something like "use towers" that makes stuff like that, if you have it enabled, try turning it off.

Hello @Kari, thanks for the gcode. It has been generated suitable for a printer whose origin is in the centre of the build plate. You need to check the Cura machine settings for your printer and make sure that the Origin At Centre checkbox is not enabled.

Please attach the gcode so we can see what's happening. Thanks.

I think you just need to use a lower value of max comb distance with no retract. I typically use 10 or 20.

It croaks after printing this: File "X:\3.6\build\inst\lib\python3.5\site-packages\UM\View\GL\OpenGLContext.py", line 29 in setContext So it looks like it has some problem with your system's OpenGL graphics (most likely drivers, the're always causing trouble). Are your drivers/libraries up to date?

Nope, what you say is true and that's really why the sharpest corner z-seam strategy doesn't make sense for models that have corners that cannot be distinguished by their sharpness. Where it is useful is for an object that has mostly smooth curves and also an edge that runs vertically up the model and that's where you want the z-seam to be because it will be best hidden.

When using the user-defined z-seam position, turn on the relative position option so that the x/y position of the z-seam hint location are relative to the centre of the part's bounding box. That also gives the obvious benefit that you can move the model around the build plate and the z-seam hint location moves with the model.

As the person who coded the sharpest corner feature, here's my thoughts... Don't use it for any model that has corners of similar "sharpness". Personally, I always use the user-defined z-seam hint with, maybe a seam corner preference but I never use sharpest corner z seam alignment. Personally, I would not choose sharpest corner as the default value for that setting as it nearly always gives a crap result.

I would recommend setting the max comb distance without retract setting to something like 10-20 (mm) which will stop the major dribble that occurs when combing. It's likely that's what's causing the crappy wall downstream of the z-seam you can see in your photo.

Hello @SimiDitto. Cura behaves that way because it is being a little lazy when you print outer walls first. In the situation where the hole(s) in the object lie very close to the outer perimeter you will have a reduced number of walls because the gap isn't big enough for them all. In that situation if it printed all of the perimeter walls first one of the perimeter inner walls could be touching the outer wall of one or more holes and so it would not be obeying the setting. So to ensure that all of the outer walls are printed first it prints the perimeter outer wall and then the outer to inner walls of the holes and then goes back to print the inner walls of the perimeter. It could spend more time determining if the holes are close enough to the perimeter for that to happen but it doesn't. Hope this makes sense.

You can't avoid travels starting and ending on the outer wall. After all, you have to travel to/from the wall somehow. There is an option to print the outer wall first (it normally prints inside to out). If you use that then having printed the outer wall, it should move inside the model to print the inner walls, infill, etc. If you are seeing poor quality due to travels then that means some setting(s) could be wrong (retraction amount, speed, temperature, etc.)

Hello @jooc, thanks for the files. I was hoping that the Cura gcode file would contain the settings info at the end but that seems to be missing so I have to guess as to what settings you used. I recommend setting the z-seam alignment to User Specified and use Z Seam X/Y values that specify a point that is not in the centre of your model. Also, set the combing mode to "No Skin". For gyroid infill, I would specify Connect Infill Lines and also I don't bother with Alternate Extra Wall.

Hello @jooc, please attach simple example gcode for the same model produced by s3d and by Cura so we can compare the travels. Thanks.

Looks like you have coasting enabled, that leaves gaps visible in the layer view.

Hello @DivideByZero, if you set the combing mode to "No Skin" it should not leave that dribble between the skirt and the model.

How about posting some images and maybe even attaching the Cura project file so we can get an idea of what's happening?