SoliForum - 3D Printing Community — Slic3r producing JUNK!

Re: Slic3r producing JUNK!

2013-04-04T16:55:55Z

I agree that understanding how the manifold problem came about would be good to understand, but I haven't been able to figure it out. The part was created by a union between the two basic shapes. I use the logical combines for solids for many of my parts without problems. I'm reasonably sure that the union, in this case, created the problem. But, I know no other way to create that shape.

Before I started this thread, I recreated the part in several ways that were simpler than the original and all had the problem. I think that when the union was done, my CAD program flubbed the process. I have had some problems on occasion where it doesn't result in correct results and the error can be seen in the CAD programs own renderings. I think it's actually a bug in my CAD program. I've found many and just work around them as they occur.

Nick

Re: Slic3r producing JUNK!

2013-04-04T01:28:32Z

Thank you Nickythegreek and pcpoirier for your help. I strongly suspected that a manifold type issue could be at the root. I tried recreating the part different ways to eliminate the problem, but no success. I've never had a problem with my stl's before, but then I've only been exporting to stl for a couple of months. (Eight years of using Argon and never needed stl before.) I was going to ask about a cost-free s/w to analyze the stl, but you suggested first.

Nick

Re: Slic3r producing JUNK!

2013-04-03T22:48:25Z

Alrighty,

First thing I did was try to slice it in Kisslicer, as it is normally a pretty big crybaby on manifold issues. It handled the stl like a champ and produced some great gcode even though it did find some problems in the original STL.

Slic3r .9.9 did not produce acceptable gcode from this STL. It does however warn you that there might be errors:

6:36:31 PM: Warning: The input file contains a hole near edge 63.899899,85.339203,12.418612-63.899899,85.339233,12.000357 (not manifold). You might want to repair it and retry, or to check the resulting G-code before printing anyway.
6:36:32 PM: => Processing triangulated mesh
6:36:44 PM: The model has overlapping or self-intersecting facets. I tried to repair it, however you might want to check the results or repair the input file and retry.

Whenever you see this error and you see the gcode preview is messed up, go to the cloud! You can use http://cloud.netfabb.com/ to clean up these types of problems quickly in a STL when they arise. However, if you are designing your own parts, you would be better served learning what in your design is causing the issue so that you are less likely to repeat it in the future. The cloud service stated that the STL was not manifold as it had 2 holes. I have attached the cleaned version from netfabb, and it now slices correctly in slic3r.

Re: Slic3r producing JUNK!

2013-04-03T22:00:46Z

I would like to post the stl file. I tried to do so in my first post. But, the file was too large. I will try to upload the file in binary: it's smaller than ASCII. It seems that it will upload.

Here it is.

I appreciate the help. pcpoirier's stl did print correctly, so at least I have a workable stl file for that part. But, of course, it's just a prototype and I will almost certainly have to change it before the total design is done.

For information, the part is a piece of an RC quadrotor frame that I'm designing. Designing is much more fun than just flying.

Nick

Re: Slic3r producing JUNK!

2013-04-03T20:20:45Z

nfhill wrote:

Ran into a problem with Slic3r today. It can't seem to lice this object correctly. I've tried reorientating the object on the table, but always the same garbage.
Any help would be appreciated. I can't figure out what's wrong.
I've tried to attache the stl file, but the server says too big. I've attached the object in STEP format: it imports ok in my CAD, but at 25.4 times too large. So, if it is larger than 32mm in Z, scale by 1/25.4.
Nick

You should post the STL that you are loading into R/H to use with slic3r. The stp file is nice, but people might be converting it to a stl differently than you are. So we wont really be able to narrow down the cause.

Re: Slic3r producing JUNK!

2013-04-03T19:54:47Z

I used catia and saved as a stl.

I read it in R/H scaled it by 0.0393700787401575.

I saved the STL in R/H which for some reason is much smaller than original.

Re: Slic3r producing JUNK!

2013-04-03T19:34:35Z

Hold the fort! I downloaded pcpoirier's version of the stl and it APPEARS to be slicing correctly. So, again, how did he get the stl file so small and what s/w did he use? I'm going to print it to check.

Nick

Re: Slic3r producing JUNK!

2013-04-03T19:29:23Z

Here are a couple of CAD renderings showing what it should look like and a photo of what gets printed. How did you get the stl so small? Mine are 1.7M for binary and 7.4M for text.

The 'conical' part has incorrect outer shape and lots of the open space is filled in solid. The hole in the 'rectangular' part is missing. I'm using Slic3r 0.9.9.

Nick

Re: Slic3r producing JUNK!

2013-04-03T13:56:59Z

Got any pictures?

I posted the stl from R/H so others might help.

Slic3r producing JUNK!

2013-04-03T07:49:23Z

Ran into a problem with Slic3r today. It can't seem to lice this object correctly. I've tried reorientating the object on the table, but always the same garbage.

Any help would be appreciated. I can't figure out what's wrong.

I've tried to attache the stl file, but the server says too big. I've attached the object in STEP format: it imports ok in my CAD, but at 25.4 times too large. So, if it is larger than 32mm in Z, scale by 1/25.4.

Nick