I’m jealous! I really want an MMU but haven’t bit the bullet especially after all the hardware and rails for this guy. That looks awesome!
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Something different:
The STL for the Core gives a lot of intersecting triangles in Materialise Magics (profesionnal stl software used for industrial 3d printing)
Here a screen:
I will see if i can run the fix wizard to fix this as this might gives some problems for some slicers.
Will you print it?
Please tell us if tehere is any difference in printing (time, filament weight…)
What is an MMU?
MultiMaterialUnit
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It took netfabb a good 10min to fix the core in prusa slicer
What about a topic sharing slicer profiles, filament type and steps taken by users?
Successful or not.
I realize that there factors outside slicer, and that a lot of us have homemade machines, but it may help.
Or some sort of Print it Forward system, like the Voron team uses. Not for all the parts, as I know Ryan sells for a profit, but just for the core.
I wouldn’t have a problem creating prints for those who need.
Everyone’s been so helpful and it’s disheartening to see so many failed prints - especially from first time MPCNCers.
EDIT: Also, a topic sharing print settings may built enough data to come up with generalized settings, as well as give an idea what people are working with.
EDIT 2: Maybe even, and I have no idea how real fabrication works, but outsourcing aluminum/steel/whatever, of the core, to China, and selling upgraded core parts, as printnc does.
Could you explain the problem in words a total newbie (aka me) understands? 
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The STL had/has some model errors from the conversion from solidworks to stl. Sometimes the triangles that make the model overlap, or not touch. Most modern slicers fix this on the fly, but if the error is large enough you get weird slicing issues.
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Railcore II 300ZL .2.zip (1.2 KB)
Not sure if your printer can use it, but here’s my prusaslicer .2mm profile that I used.
You may or may not have to turn off supports, I can’t remember if it was turned on when I copied the profile, my last print had supports…
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Thanks!
See? Helpful!
Mine printed fine. Ended up using all scrap pieces of leftover black PLA. Some over 2 years old! It looks… not great (or really cool), but the darn thing is done, at least.
My Voron will be done this weekend so I will be able to print much faster. Waiting ‘till then to print more.
How do you like the RailCore?
This thread has 2314 replies now. Any useful technical information or discussion is going to be very hard to find.
New posts are free, they help keep the details focused on one issue (although we frequently get side tracked), and they are easy to read.
No one needs permission for new posts. Fire away.
IMHO, this thread really should be used for conversation, news, or release related questions. Technical primo questions (printing or assembly) would be better in separate threads. No hard feelings if that doesn’t happen though.
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Can you share the “fixed” STL file?
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On a related subject, I noticed the polygon count (or at least the file size) are very high, and it seems quite a bit higher than it really needs to be. I don’t want to whine about something that’s not really an issue, but as long as we are remeshing, maybe we can cut the polygon count? Perhaps @vicious1 can do it on the official ones?
No love for HD stl’s?
Odd, I actually ran most of the stls through a repair process and either fixed them or had no errors. I orient, repair, then export them.
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You live on dialup and didn’t like the huge file downloads? 
Practically the only issue is it’s a bit sluggish when I import into OpenSCAD for slicing and dicing and re-exporting. It’s very doable but the intersections and unions (or convex hull) take a while. I haven’t tried any assemblies of more than a few parts but I might have to remesh them at lower resolution if I did. It’s a small thing, really more of a weakness of OpenSCAD. I’ll survive either way.
Probably a shared AOL access point from the top-left corner of Kazherkistanistan…
My deepest apologies to any Kazherkizerks, no offense intended. AOLers deserve the scorn and ridicule…
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