Inside walls smooth & rough but outside perfect.

[James-Hydra]

Hopefully someone here can help me with a small problem. I can't seem to find the fix for this. When I try to print some things, the outside is perfect, and parts of the inside are perfect while other parts of the inside are a mess. Here is the STL I am trying to print, as well as a couple of photos (can't add photo of the other side, but it is perfectly printed). I am also adding my profile.
You can see in this photo how parts on each side are fine while the middle is a mess.
Can anyone please help? I bought S3D over a year ago and if I can't fix this I am switching back to Cura, because I have had enough.
(Same problem on 3 different printers so it is not a hardware problem)

Thanks for even reading this post.

[zemlin]

IMHO, a .32mm layer is too thick for a .4mm nozzle. I generally stay around or below 50% of the extrusion width. You might be getting some pulling of the extrusion on inside corners, although your .5mm width should mitigate most of that.

The STL file is a mess and doesn't pass any of the S3D quality checks - plus the tessellation is just wierd. Where did that model come from?

S3D does not generate the most efficient G-Code. I've found I get less stuttering on dense STL models with Slic3r (Prusa), but I prefer S3D for most stuff. For the same model and similar settings a Slic3r GCODE file will be substantially smaller than an S3D file. I haven't studied them to try to figure out why.

[James-Hydra]

I got it from Thingiverse. Unfortunately my Cad skills peak at Tinkercad.com. I'll look into Slic3r. Thanks!

[gearsawe]

Are you printing nearly solid?
It kind of looks like over extrusion to me.
Is the filament diameter measuring much bigger than it should?
If you print inside to outside and there it over extrusion this is the end result from my experience.

[James-Hydra]

The profile I am using to print this is available to download and view in the link provided above.
If it is over-extrusion, why is it only in the middle, but not on either side?
Neither is it anywhere on the outside, which is perfect.

[gearsawe]

would need to see the model too. But you are print Inside-Out. as I suspected.
I always print Outside-In. If things are over extruded because of bad filament diameter then the blobby looking will be inside the shell with the infill.
Look in your layer tab.
That is the only thing I can see by looking at the profile only.
If you don't want the post the model. adjust the Profile to output only maybe half the model when the problem is worse and save that G code file. I can then use S3D to preview the gcode.

[James-Hydra]

I have provided everything necessary for people to help with this problem, and the model STL is also above, I guess you didn't see it.
I print inside-out because the largest number of people questioned about their profiles state that it gives the best quality prints.
My own testing in this matter proves that theory as well.

But so far nothing you have mentioned or questioned explains why on one face of the print, the sides are fine but the middle is all messed up, and every other part of the print is perfect as well.
Inside-out or outside-in or over-extrusion, nothing explains what is happening.
Especially over-extrusion. It doesn't just happen on one section, it happens all over or not at all.
But thanks for your suggestions.

I put up a post here regarding the same problem over a year ago and still no one has been able to help.
i will keep looking for a fix to this issue, but I will just have to look elsewhere.

Thanks for taking the time to offer solutions.
I appreciate it.

[gearsawe]

I will print it on my system. Just waiting on another print for the next 3 hours.
I will print it at 2 shells 2 top/bottom and infill at 60%.
Yours just looks like an over extrusion issue . I'm not going to bother with support. Just will stop it at the point where support it needed.
And will move the flange below the print bed so I don't waste time getting to pthe problem area

Setting look ok
If filament is measuring under 1.75mm that is good.
Next get a ruler with centimetres on it. put the larger number end at the edge of the inlet of the extrude. Mark the filament at the 0cm mark. Extrude 10cm of filament. Did the mark stop at the 10cm mark of the ruler?
of it stops at 10.5cm. that is way to far. This would mean it is extruding 5% more material than it should.
Many times low end printer are not calibrated well from the factory. Like mine was.
When I got mine it would extrude the total distance of 10.2 when told to do 10.0, This caused a lot of issue like those you are seeing here.
I would rather it travel 9.9cm when told to do 10.0

If I print it and have no issue can I send you the billl? HA!

[James-Hydra]

I have been printing for 4 years now. My printer is fully calibrated. It is not over-extrusion or the problem would be everywhere, as I stated before.
You don't get over-extrusion artifacts just here and there and the rest prints perfectly, you get it everywhere.
The problem is not hardware, it is software.
But go ahead if you want.

[gearsawe]

Printed fine here. Did not have support on so the bad spot is where there should have been support.
I printed it at 2 layers top and bottom. 2 shells, Outside-In 60% infill using Rectilinear.

what is the purpose of the lip the red arrows are pointing to?
if there is no purpose. I attached a redesign thinned out the hood a little reducing the martial usage by 30%
I did not print this new one. I printed yours.