Hello, Im trying to export this object as a mesh for rapid prototyping. Im following the settings recommended by Kyle in his video. However, when go to send the file, Im getting this dialogue box. Any ideas on what Im doing wrong?
Here are the steps that I’ve taken to create this mesh.
I created a water tight polysurface and checked it with Naked Edges, Selbad etc… Everything checked out.
I entered mesh with the object and selected the number of polygons
I triangulated the mesh
I then exported it as an stl
So where have I gone wrong? How can there be an open mesh if its a water tight solid?
Thanks for your time,
Hi Richard - can you post or send me the Rhino file?
I’ve already posted it in the forum? BTW, the last 3 post that I created are not in there?
Hi Rick - all I see is an STL file at the top of the thread.
Here is the file Pascal
Whats interesting is that when I created a pin without a center hole, there is no problem with the mesh or 3d print. When I create a copy with the hole thru the center, it will not print?
Here is the Rhino fileSputnik Pin 2a w_hole.3dm (5.4 MB)
Whats interesting is that when I created a copy without the hole thru the center of the pin, there is no problem with the mesh or 3d print?
Hi Rick - the mesh that is in that model is not the same as the one at the top of the thread as stl. Have you exported the mesh that is in the model you just posted and tried to print that?
Yes, that was the original that was giving me problems. So I started from the beginning and made another model and got the same results.
Hi Rick - I am confused - the stl file posted at the top of this thread has this in it:
The mesh object that is in the file with the solid in the file you posted just above a few notes has this:
The second one can be printed, I would say, and the first one definitely not…
Sorry for the confusion!
Let me explain. The first stl that I posted was the one with the open mesh that you responded to. According to Rhino, it was a good mesh. So, I tried to send it to a 3d Printing service and it was rejected. The first prototype of this object had no hole in the center and printed perfectly. So, I assumed the problem was the hole in the center. I sent a modified file (without the hole but containing other changes) to the 3d Printing service and it was accepted. So again, Im thinking there is something about the hole thru the center thats creating the problem? I carefully made another model, this time with the hole in the center and again its being rejected.
I hope this explains and am very sorry for the confusion.
Hi Rick - just to be clear, the fact that Rhino tells you a mesh is ‘good’ does not mean it is closed… the first one was not closed, and therefore will not print. The mesh that is in the second file, with the hole down the middle, looks both ‘good’ and closed, and ought to print as far as I can see. If you can get more specifics about why it is rejected that would be useful.
Thanks Pascal. I’ll send it to the printer once more and let you know exactly what their response is.
Here is a screen shot from the 3d printer’s website that describes the problem with printing?Screenshot 2019-02-14 14.00.28.pdf (314.8 KB)
Ah - ok - see the dimensions? I expect that is the problem - when you add the hole, the walls are too thin.
I did an offset surface of .0625 is this not enough? Is there a better way to control wall thickness?
The pin looks to be about 10mm long - is that what you intend? If you are working in mm and the wallthickness is .0625, I’d say that is a problem. My guess is you modeled in inches and then exported - STL does not know about units, so on uploading to the sevice there may be a way to tell them your file is in inches.