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slic3r / Slic3r

Open Source toolpath generator for 3D printers
https://slic3r.org/
GNU Affero General Public License v3.0
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Last 15-20 layers are duplicated #736

Closed wout closed 11 years ago

wout commented 11 years ago

I am using Slic3r in ReplicatorG 0035 for Ultimaker and I run into an odd problem with a mechanical part. It is a wheel with a radius of 40mm and a height of 16mm. The edges of the wheel have a fillet with a radius of 1.9mm. At the bottom the fillet is printed as it should but not at the top. The last 15 to 20 layers are identical where they should gradually move inwards to form the fillet. I designed the piece with Rhino 3D and the exported STL looks perfect. If I look at the generated gcode in Pleasant3D I can see the top edge is indeed generated straight. At first I tough something was wrong with my drawing so I started over and drew it again from scratch. Oddly, after generating the gcode I ended up with the exact same result.

alranel commented 11 years ago

You should please test it directly with Slic3r without ReplicatorG. Also, make sure you use the very last Slic3r version (0.9.3).

If you still experience the issue, please post some screenshots (of both the STL file and the G-code paths) that describe your problem.

wout commented 11 years ago

Thanks for the swift reply. I tested without RepG and with Slic3r 0.9.3. This time another part and it is even worse. this is the original shape in Rhino 3D:

Rhino3D

If I open the exported STL in Pleasant3D it looks fine:

STL

After generating the gcode with Slic3r this is the result:

gcode

You can already see nothing is left from the original shape.

The printed piece has the four holes and a small ramp up for the first 25 layers but then it just goes straight up, repeating the 25th layer (it is not exactly the 25th, that is around where it happens):

print

Please let me know if you need any more details.

alranel commented 11 years ago

I really guess the missing connecting parts are too thin to be printed with your settings, and the slope is too light to be printed with layers.

wout commented 11 years ago

In fact it is quite a large part (diameter of 120mm). The grid in the background are millimeters:

Base frame

I have printed items with a lighter slope before so that should not be the issue either.

sysdump commented 11 years ago

Run it through netfabb (http://cloud.netfabb.com/) and check whether the fixed stl slices better.

alranel commented 11 years ago

Then please, attach your STL file and config.ini.

wout commented 11 years ago

Running it through Netfabb worked like a charm. Apparently there was a problem with the fillet on one of the holes, which I noticed in the Netfabb Mac app. Would you still like to get the files?

alranel commented 11 years ago

No, thanks: Slic3r is only supposed to work with valid files.