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91
Questions & Troubleshooting / Re: Splitting solids in Meshmixer
« Last post by TheClumsyOne on August 09, 2017, 06:47:18 PM »
That worked immensely well! Thank you for explaining the Bridge function...I was wondering why it always failed.
92
Questions & Troubleshooting / Re: Splitting solids in Meshmixer
« Last post by MagWeb on August 09, 2017, 05:44:23 PM »
Ah, I see....

Using Bridge you're on the right track.

Bridge needs exactly two selections at the open boundary. Both selection have to be not interrupted by not selected faces at the boundary.
Do Bridge at the flattened tip edges and maybe at one side of that upper inner corner. Fill the remaining holes at the "sides" using Inspector.
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Questions & Troubleshooting / Re: Splitting solids in Meshmixer
« Last post by TheClumsyOne on August 09, 2017, 05:25:33 PM »
Thanks for the advice - let me explain more clearly. This is an image of the part I'm trying to print:

segmenting.png

The lighter region I want to make a separate object so that I can print it using gold filament. The rest will be red. So when I use Select and Separate, I get

segmented.png

Since this is an STL and is hollow, separating that region gives me a non-watertight shell. I tried Make Solid and

solidfail.png

It has trouble generating the solid for some reason. If I change the settings (such as Mesh Density) the result doesn't change. I have also tried selecting the boundary of the opening and using Erase/Fill, but that doesn't work either. I tried Remeshing the entire part to increase the number of elements, but that had no effect. I tried using Bridge but that function aborts everytime I use it without fail.
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Questions & Troubleshooting / Re: Splitting solids in Meshmixer
« Last post by MagWeb on August 09, 2017, 04:38:56 PM »
Not sure about your issue and your printer's technic. But I assume this scenario:

You've a hollow object. This is made of two, not connected shells. You want to get a single object where the outside is printed in a color A(white) and its inside surface in color B (black).

I would do it this way on a dual extrusion printer using Slic3r:

Leave the object as it is but construct a "Modifier object"
in MM SELECT the outer surface and run Edit/Extract with Direction set to Normal and a negative Offset in value smaller (maybe half) than the objects wall's thickness (you may use ANALYSIS/Measure  (local thickness) to check this distance. Details see: http://www.mmmanual.com/measure/). This creates a third shell which is selected now (you can't see it). Hit Y to separate this shell as an object.
Export both objects A( the original) and B (the third shell).

In Slic3r import (Add) object A. This active go to Settings (gear icon). Now "Settings for A" dialog will pop up. Click on LoadModifier and import B as an modifier object. Activate B in the upper treeview list and set the second extruder (assuming the inside color, black, filament is feeding to this) while you leave A at the default (first) extuder (outside color white feeded to this). Confirming this dialog Slic3r should create GCode where the intersection of A and B ( means inside of A and B) is printed with black (using extruder 2) while the difference A-B (outside of B) is printed in white (extruder 1).
95
Questions & Troubleshooting / Splitting solids in Meshmixer
« Last post by TheClumsyOne on August 08, 2017, 09:08:44 PM »
Hi all,

I've got a somewhat complicated part where I want to print inner regions (of irregular shape) in one color and the rest in a different color. I have no trouble selecting the appropriate faces and hitting Y for separate, but then the problem arises that the part I separated is composed of 2 shells since STL files are hollow. Make Solid sometimes works, sometimes doesn't. The same applies for the part I separated from. I tried to make the entire thing a solid and then do the separating, but either Meshmixer doesn't actually produce solids or the select function can only select surfaces since I get the same result this way. I tried using Inspector to close holes, but depending on the geometry this has variable success (for 2 flat surfaces with nothing in the middle it unsurprisingly fails).

I also tried selecting and then using the Create Solid Part feature...but the thing that it creates is the same 2-shell object - in other words, not a solid. What this boils down to is I can't print these parts since printing requires watertight geometries or solids.

So...is there a way in Meshmixer to split off a solid piece from a solid geometry? Keep in mind I'm not talking about Plane Cut - I want to choose a region of my geometry to separate that isn't necessarily a clean split on a plane.

Thanks in advance!
96
Questions & Troubleshooting / Re: How to fill a crack ?
« Last post by MagWeb on August 04, 2017, 11:37:34 AM »
Seems that these are just wired holes?

Did you already try to fill them using ANALYSIS/Inspector (further info at:http://www.mmmanual.com/inspector/)

Another thing you could try is to use the SCULPT/ZipperEdgeBrush (which pulls open boundaries together) first and run Inspector after this step.

@ WeldBoundaries Bridge and Join : These tools need two boundaries (or two selected regions at the boundaries). There's only a single  selection loop in your image. There's also a tiny connection (maybe just a single face). This might be a problem too.

97
Questions & Troubleshooting / Re: How to fill a crack ?
« Last post by locweb on August 04, 2017, 10:02:20 AM »
I tried too with weld boundaries, same error message !
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Questions & Troubleshooting / Re: How to fill a crack ?
« Last post by locweb on August 04, 2017, 01:39:44 AM »
Hi, I tried many options: Brige - Join and I get an error message.
I tried to smooth boundaries, same error.
Here you have a screenshot.
Thanks
99
Questions & Troubleshooting / Re: Importing a .FEM file
« Last post by MagWeb on August 01, 2017, 01:01:09 PM »
Sorry, there's no .fem import/export in MM.
For MM's supported formats see:http://www.mmmanual.com/export/
100
Questions & Troubleshooting / Importing a .FEM file
« Last post by mugecandogan on July 31, 2017, 02:39:10 PM »
Hello,

I am working with lattice structures. My ultimate goal is converting the lattice structure (generated in HyperMesh) to a 3D printable STL file. I was wondering if I can import a HyperMesh .FEM file (lattice optimized already) into Meshmixer to convert it to a solid mesh ?

Thank you,

Muge Candogan
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