infill mess

[illbeback2]

Hi,

We are using simplify3D. Printing the infill becomes a mess. The infill lines don't stick to the underlying level well enough. See picture.
ABS, bed 80 degrees, nozzle 230 degrees, infill speed 50%.
Fiddling with the 23000 parameters doesn't seem to improve much.

The problem has two aspects; de thin lines don't stick to the layer well enough, but the nozzle also runs through the lines in the other direction it just made, because they are in one plane. This seems to be a conceptual flaw of the pattern in Simplify3D; I wish we could choose from patterns that don't collide, like Slicr3. The problem appears more to the middel of our object. With smaller objects no problem.

It is as in the middle there is too much cooling involved for the thin line infill to stick to the underying layer and then the lines are too easely rammed of their spot when the nozzle makes the lines in the other directions. After a while the priner prints in the air and feeding stops...

Does anyone has the same kind of problem?

Rene

[JoeJ]

What do you mean by infill speed of 50%? There isn't any option to slow down the infill speed in the software... Are you sure you didn't change the infill extrusion to 50% of normal? because that would definitely explain your problems!

Regardless of your answer to the above, I would also suggest increasing your infill extrusion width to 150-200%. That creates much stronger infill that bonds to the layers below. Thankfully that's a very simple option to use which makes a big difference.

[illbeback2]

Tnx Joe for your answer.

Well, There is a setting for the infill speed; by default it is on 80% of the standard speed.
It is on the tab where you can define the different speed settings
So that's why I thought lowering the infill speed might help.

I think I already tried to make the infill extrusion wider, but I will have abother go.

René

[JoeJ]

I think the setting you are referring to is "SOLID infill underspeed". The infill you are showing in your picture is sparse, not solid. The solid infill underspeed option only applies to 100% infill regions (i.e. the outer surfaces of your model). So setting that to 50% will have ZERO impact on the regions that you were showing in your picture. If you want to print the interior sparse infill slower, then just decrease your default printing speed (since infill is typically printed at that speed)

[illbeback2]

Hi Joe,
Yep, you are right.
Increasing the temperaturen of the nozzle gave an improvement, but not good enough, yet.
Doing a new test on half speed, now
Tnx,
Rene

[jimmybuckets]

Is your extuder feeding filament properly? It looks your filament be slipping and not getting fed at higher speeds.

[illbeback2]

@Jimmy, I think that's not the problem (earlier, we had to made some improvements to centre the filament cilinder and to prevent the filament wire to come loose too much from the cilinder while feeding)

Latest test was much better;

bed 85
nozzle 250
infill 35%
infill width 300%
speed (7000 from 12000)

Maybe I changed too much in one go, but I managed to print all the way, although here and there some imperfections (little blobs of filament and rough spots)
And als some burn spots; nozzle becomes black from burned filamanet and appearentle is being smeared on the object.
At the end the printed model was bed a little and made the sticker come loose from the bed a bit.
I really would like some more patterns for the infill