[Ultimaker Cura 5.2 Released]

Apologies if this is a silly question, its been a very long time since i updated or used cura.
But when updating cura and then lanching the new version, do you have to go back in a re-do all the settings you had. or will those settings remain the case in the newer updated version?
Just that if not i can screen shot the settings i have now, so that i can re-enter them all and not have to go through tuning everything again. Thanks

[Model sinking below build plate]

EUREKA!!!!!!!!!
Turns out the thing that was causing the extra growth when printing upside down (even if raised above the build plate), was that the "Make Overhang Printable" was ticked. Although i wouldnt of figured it out without gr5 suggesting about unticking "mesh fixes". So although not quite the solution, it was a big help, so thank you

[Model sinking below build plate]

8 hours ago, gr5 said:

Make all the "mesh fixes" vislbe and make sure they are all unchecked.  There's 6 of them.  One of them may be making your head solid again.  It's much easier to have your head model be solid and to set infill to 0% and then you can set your wall width to however thick you want.  It will print much faster this way also.

 

I'm still not sure what is going on with the top of the head.  The head looks like it is raised up off the bed yet there is still something touching the glass.

I thought about doing that with regards to just setting the infill to 0%, but then i thought it will still need to generate supports. And seems as the bottom is sealed, then the supports would be stuck inside rattling around. 

As for the head being raised above the plate, you are correct, it is. yet for some reason it is then creating a growth of some sorts that is extending down to touch the build plate. Again this is solved by printing the right way up, but i want to understand what and why these things are happening in order to better understand. I have in the past contacted ultimaker themselves with another problem i had once, but they just tell people to come to here. They don't seem that interested.

[Model sinking below build plate]

O.K so i followed a few tips mentioned. However im noq left more confused than before.
So i disabled the automatically drop the model on the build plate, and even raised it manually by 5mm. But for some reason the same things happens. When viewed in layer view you can see, but when switched to soild view, it is just floating above the build plate as expected.
I even tried slicing in the upright orientation that i didnt want to print it in. But when doing this and then slicing, cura seems to make the model completely solid, despite the model being hollow. I have the infill set to 100% so as to make the walls stronger.

Im not sure why these things are happening as ive never had these problems before with cura. ARRGGHHHHH!!!!!

[Model sinking below build plate]

2 hours ago, peggyb said:

you can lift the model a bit by disabling 'automatically drop model on the build plate'

and in the move command put in a positive number in the z box

Note: the surface around the red overhang area will not be good, as the support has a little distance to the model and will drop down and leave strings.

You could do some tests with a sphere or your original model to see what the best method is, and stop the print after the bottom slope to reduce time/filament. Play with the x y z distance to get the best support, but not fused to the model.

 

Or turn your model 180 degrees...

 

Thanks I didn’t know that could be done. The only reason I didn’t print it the right way up was to save filament and print time, as it reduced the amount of supports needed

[Model sinking below build plate]

12 hours ago, gr5 said:

I meant to add supports in the cad software that you used to create this model.  I usually create my own supports as I'm a little (a lot) smarter than cura is.

 

Well without seeing the part in layer view it's hard to tell what happened.  At the same time I save the gcode file I also do "file" "save project..." so I can go back and see all my settings and the positioning of the part.

 

If you click on the part and have the "move" icon on the top left selected you can set the Z value to negative values which will move the head under the bead.  Or if you simply rotate the head 180 degrees so it's upside down this can happen as well.  But you will SEE the problem in layer view.

 

Always look at your part carefully in layer view before printing.

 

I didn’t create the model so I couldn’t add supports. As mentioned I’m a complete novice and just about manage with tinkercad.  I always check the layer view before printing, and when looking this one in layer view prior to print it showed nothing that I could see as a problem. It certainly didn’t show the model below the build plate. When I reloaded the model into Cura again after the print came out like it did, it again just sat barely touch the build plate. I tried to raise it slightly manually but it just dropped back into position. Even when typing in the number i.e Z height at 3mm

[Model sinking below build plate]

The print did have supports just that this view is not showing them. I don’t have a layer view as this picture of the model in Cura are from after the print completed. I re-loaded the printinto Cura to get these pics and show how it looked the first time I sliced it. The print itself cams out fine quality wise just that flat part on top of the head. 

You mention about adding supports around the head, in particular on where to place them. I thought you can’t do that with Cura? I thought you tick the generate supports box and Cura automatically generates supports where it feels they are needed. Can I manually place supports and if so how.

also is there a way to set a print a couple of mm above the build plate

[Model sinking below build plate]

I’ve just completed this print of a head, it was orientated upside down to save on supports needed. As you can see from the screen shots it is barely making contact with the build plate as I wanted. However once the print had finished its as if the model was below the build plate. 

Can anyone explain what has gone wrong, if it’s something I did, and/or how can I fix it please

[Filament or settings ???]

. Hi all, I am having a nightmare printing with the mattforge filament. My prints seem to be very weak and brittle. Now i dont profess to being an expert, i am but an extreme novice who prints for mine and my daughter fun as we like to print and paint models together. So any conclusions expressed are based mostly on pure observation. But i wll include some pics to hopefully show what i am seeing.
Now the setting i have i have used over and over and had no problems with other filaments. I have printed the same models sometimes with different filament brands (often cheap ones) without any of the same issues, which is why i think the issue is the filament. However when i asked about this and showed pics on a facebook group people suggested the issue was either under extrusion and/or settings. i can see there are some under extrusion evident on some pics of a certain model, but i am still having issues on models that have no under strusion problems at all. I have changed the print temp between 195 (recommended ideal temp) up to 220 (which some said they had best reslts from for this filament) and there is no difference. I have increased material flow in 5% increments up to 115% and still no change.
As for other settings; as mentioned i am a complete novice and if i am honest dont really fully understand them so dont like to mess with them too much. But if the issue is settings can anyone recommend changes that might improve the situation?
What i am finding is that once printed, the model is very weak and brittle, it does not take much force to cause what ever the model is to fall apart, also the perimieter walls dont seem to be sticking together very well as you can also see in the pics. This seems to be the biggest contributing factor in the weakness of the model as once they seperate the who things goes to crap.

Again, i dont have any of these problems with other filament, only mattforge. I did contact them for advise and all i got was that it is under extrusion and to increase flow rate. Which i did to no avail

[Acetone Finishing on PLA]

This is the PLA from colorfabb that i have and acetone is not working mine. I have had this sat in acetone for over a week now and its not touched it.

I don't why or if im doing something wrong, I noticed one of your posts says that the acetone has to be 100% pure so i will check the bottle of what i have.

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