Top Layers not solid, but Raft top layers are??

[real_Napster]

ok, I'm home now.

If I load my factory file I get the XML parse error.
Seems like it's because of the "ß" in my object filename.

I renamed the file and created a new factory file:
http://www.zersan.de/3d/top/big_lid_new.factory
it's also some kilobytes bigger.. maybe it really was just corrupt.

do you still get the errors with the new factory file?

[horst.w]

no, that's right now.
But the dimension is big (inch?) – approximately 95 x 95 x37 mm, thats right?

More comments tomorrow

H.


On the fly
your problem is that the Raft seems ok, but the Infill didn't.

Raft will be printed with the ExtrusionWidth, what you have set to 0.38 mm by nozzle width 0.34 mm.
That seems ok, but your Infill is set to 150 % ExtrusionWidth what I calculate to 0.57 mm. Perhaps it is possible, that the flat bottem of the nozzle is not as wide as this messure and the problems are caused there. The program calculate always the lines way depending of ExtrusionWidth and when this nozzle only can press out for e.g. 0.50 mm, than there will be a gap of 0.14 mm (2x 0.07 mm).

Please test it out with setting the Infill ExtrusionWidth for 100 %, thats enough and we see perhaps a difference.

H.

Hi,
I'm a little bit confused,
but how you want to print this without support?

[dkightley]

I'm also very confused.....

Firstly, the pictures of the raft surface may not be the surface of the result of the latest factory file. They look like the result of slicing with a pre v4 version of S3D. If they were a prev4 print, then its a waste of time trying to relate a surface finish of a pre-v4 print with v4 software settings!

Secondly...as Horst has pointed out, the print in the latest file would fail as there is no support...and the top surface of the model if it did print would likely be awful! Again...nothing like the photo in the first post.

I get the feeling we're fighting against continually changing printer settings....and we're never going to be able to suggest the right tweaks to make!!!

The only good thing that may have happened is that an infill width of 150% reduced down to 100% should result in a much better finish. The infill width is NOT an expression of the amount of plastic extruded....its the pitch of the extruded lines. 150% will result in lines one and a half times the standard extrusion width..but placed at one and a half times the distance between the centre line of the extrusions!!

[real_Napster]

Hi guys,

first of all:
I forgot to check the "add support" box in the factory file yesterday. As you noticed, the object is impossible to print without support... my fault!
2nd fault: Unfortunately I selected the wrong material.... But most settings should be the same!

This is the final factory file (double checked support and material settings - this is 100% the version of the picture in Post #1):
http://www.zersan.de/3d/top/big_lid_new2.factory

______________________________________________

Firstly, the pictures of the raft surface may not be the surface of the result of the latest factory file. They look like the result of slicing with a pre v4 version of S3D. If they were a prev4 print, then its a waste of time trying to relate a surface finish of a pre-v4 print with v4 software settings!

I use the latest v4 Version.
Surely you thought it's a pre v4 factory file because of the big raft.
S3D just creates that small raft on your picture if you print without support.
So.. It was my fault because I forgot to check to "add support" box.. Sorry about that!

But the dimension is big (inch?) – approximately 95 x 95 x37 mm, thats right?

You are right. It's a quite big object. Dimensions in mm are correct.

[...] your Infill is set to 150 % ExtrusionWidth [...]

Uhm... this is a very old value..
When I started with S3D I had some issues with weak infill structures. Seemed like printer extruded not enough material for the infill.
In the S3D quality guide I found a workaround to increase the infill extrusion width to fix that issue:
https://www.simplify3d.com/support/prin ... eak-infill

The infill width is NOT an expression of the amount of plastic extruded....

Are you really sure about that? The quality guide said it WILL influence the amount of material..


One more thing:

I get the feeling we're fighting against continually changing printer settings....and we're never going to be able to suggest the right tweaks to make!!!

I'm really sorry about that.. I don't want to steal your time... :/
I'm not playing around with printer settings.. I just forgot to add the support and unfortunately I forgot that I changed the printed material meanwhile...
As said above.. the current factory file shows 100% my actual settings



So you both think my top layers could be improved by reduce the infill extrusion width?

[horst.w]

...
In the S3D quality guide I found a workaround to increase the infill extrusion width to fix that issue:
https://www.simplify3d.com/support/prin ... eak-infill
...

Yes, I know. But the hardware must be able to handle that.
I tried messures of my smallest nozzles of 0.25 mm and the tool shows me 0.60 mm at the bottom (it's very difficult to do messures). Theoretically with this width of the nozzle you can print 200% ExtrusionWidth (=0.50 mm) but only with an extremely pressures of the extruders motor and pulley when the LayerHigh is only 0.10 mm, also as speed and temperatures , viscosity of the filament have responsible influence to the extruded lines, while the printer calculate the way of the lines without this facts. I would say as a guide line, never use an ExtrusionWidth with an higher value than 3:1, will say if LayerHigh is 0.10 mm the max ExtrusionWidth may be the best with 0.3 mm (>>> nozzle 0.25 and that is the standard value of S3Ds "automatical setting = 120% of nozzle width). Surely other values are possible, but it must be tested out with the concrete printer, the concrete material and last but not least a lot of time to observe the results while printing.



H.

[real_Napster]

I'll give it a try with about 120%

I have to admit that I didn't touch this value for a long time.
Didn't thought this could be the cause of my issue.

[horst.w]

The material is PLA I guess because you are printing with only 190° ?

For my printer and my materials (normally ABS and ASA) the relationship between speed (90 mm/s!) and Layerhigh (0.1 mm) is unusual and I couldn't print it out with my printer to get a fine surface.

H.

[real_Napster]

It is "GreenTec" from manufactor "Extrudr"
https://extrudr.eu/collections/bdp/prod ... ntec-black

my print quality with 90mm/s and 0,1mm is ok so far (Printer: Velleman Vertex K8400)
Not perfect, but ok! (I'll post some images later)

[horst.w]

aaah, thats why! Ok.

Here is a source to be read from the beginning to the end about your Velleman 8200/8400

http://forums.reprap.org/read.php?336,230366


H.