Slicer issue?  

RE: Slicer issue?

Filament can't be laid down on thin air, so you probably need to add supports beneath. Make sure you disable Print Settings>Supports>Don't support bridges.

RE: Slicer issue?

Posted by: @fuchsr

Filament can't be laid down on thin air, so you probably need to add supports beneath. Make sure you disable Print Settings>Supports>Don't support bridges.

Ok, I know this already.  Not new to 3D printing.  Allow me to better ask the question:

Why is there nothing to support the plane being printed on?  I’ve never seen a model that would turn out like this…..ever.  For some reason, it seems that PS is not running the top layer complete to the edges around it.

I found a workaround, using a Gyroid infil at 30%.  Still stumped why that particular layer isn’t going all the way to the edges where as other models always do.

Also, I noted that it slices completely differently between draft(0.24) and fine(0.08).  Asymetrically.  I’ll have to get a pic tomorrow and post what I mean.

RE: Slicer issue?

@dragondon

Check your "Infill/Perimeters Overlap:" by default it's set to 25% if you haven't altered it, then turn it up to 50 or 60% and see if it helps.

Sometimes adding an extra perimeter to the area in question can help also, or changing the infill angle for the bridging, etc,,etc,

Good Luck

Swiss_Cheese

RE: Slicer issue?

Posted by: @swiss_cheese

@dragondon

 

Check your "Infill/Perimeters Overlap:" by default it's set to 25% if you haven't altered it, then turn it up to 50 or 60% and see if it helps.

Sometimes adding an extra perimeter to the area in question can help also, or changing the infill angle for the bridging, etc,,etc,

 

Good Luck

 

Swiss_Cheese

Thank you.  That is really useful information!  It still is set to 25%.  Odd that the actual overlap in this model, between the infill and shell seemed to be zero.  Will keep this in mind!

RE: Slicer issue?

@dragondon

I don't have your project so I can't look closely at it, all I can do is guess, however slicer may be viewing the perimeters I see in the image you posted as outside wall, so it wouldn't need to continue the bridge fill to that perimeter, it would in that case only try to place the fill past the perimeter that will be sitting on top of it in future layers. Slicer has the tools to correct the problem you just have to identify the cause so you can apply the right solution.

Regards

Swiss_Cheese

RE:

Posted by: @swiss_cheese

@dragondon

 

I don't have your project so I can't look closely at it, all I can do is guess, however slicer may be viewing the perimeters I see in the image you posted as outside wall, so it wouldn't need to continue the bridge fill to that perimeter, it would in that case only try to place the fill past the perimeter that will be sitting on top of it in future layers. Slicer has the tools to correct the problem you just have to identify the cause so you can apply the right solution.

 

Regards

 

Swiss_Cheese

I increased the overlap from 25% to 50% and saw that the layer did go into the wall a bit.  If you are curious, you can grab the stl here ( https://www.thingiverse.com/thing:4734623 ) and it was the 'wall mount' stl only, not the dock one.  In either case, changing the infill patter to gyroid and up it from 15% to 30% made all the difference.

RE: Slicer issue?

There are defiantly a couple of bugs happening here, I turned off Ensure vertical shell thickness: and changed the perimeter overlap to 40% and got this.

(Top most layer has partial bridging)

I can of course fix all this, but it's more work, it shouldn't be happening. I've found many issues with regard to turning off "Ensure vertical shell thickness:" in slicer. I normally have to use modifiers to correct them. It would be wonderful if there was some way to tell Slicer when to stop, or start, viewing a perimeter as part of the top or bottom of the shell "without using Modifiers" but at least they are there (the modifiers) so it's not a  total wash.

So yeah, it's a Slicer issue