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Prusa Mendel 2012 (1)

by ronthomp, published

Prusa Mendel 2012 (1) by ronthomp Nov 20, 2011
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I am radically redesigning the Prusa Mendel. I call it the 2012. More plastic parts, less hardware, and some much needed improvements.
Read about it here:
New parts will be uploaded as they are proven.
Many features are derivative of other parts on thingiverse. Thanks to everyone! We are standing on the shoulders of giants.


You may want to wait until the machine is together and working.
Print the parts and bolt together with 6-32 screws. I am using long screws and cutting to length.

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I tried to print the crown and other main parts but am getting an errors:

Slicing /Users/rkomar/Downloads/Ronthomp-Mendel-stl/mod3 footed vertex.STL
Slicing: /Applications/Slic3r.app/Contents/MacOS/slic3r $s --load config.ini --output $o
Loading /Applications/Slic3r.app/Contents/MacOS/config.ini
Warning: The input file is not manifold near edge 2.000000-0.000000. You m
ight want to check the resulting G-code before printing.

gt; Processing input file

gt; Processing triangulated mesh

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.

No layers were detected. You might want to repair your STL file and retry.

Anyone get these parts printed?

This design was the starting point for the Ronthomp Mendel. I suggest you print that, instead. I have 2 and there are several "in the wild".

I will make one of these as soon as it's ready to be tested. I highly recommend you call it the:

Ronthomp Mendel

See, the name even has a nice ring to it!

Is the Arch ready for printing? I want to build a reprap, and your work is too awesome to ignore.

Thanks for the kind words. I am building the first one, now. The parts work, but the slots for the bolts could be narrower.

I made a couple of jigs to aid in the tightening process. I don't want to declare this a success until I see how much trouble it is to align, and of course the print quality.

I will update the progress soon.

I have been thining about a PLASTIC POP rivet for assemblies such as this. We can even reprap the pop rivet tool.

Nice work! It looks like this could be a significant step towards increasing the RepRappable content. As others have said - don't be too shy to take some credit for the design! At the very least, it is a "Ronthomp Prusa Mendel", if not a "Ronthomp Mendel"!

I think the direction that your design is working towards is a fantastic one. You've obviously spent considerable time thinking very seriously about flaws and improvements in the Prusa Mendel design, and have the engineering skills to realize them.

If I may make a suggestion: this work is your own; this ought to be a Ronthomp Mendel, not a Prusa anything. Take credit for your hard work!

I have to agree. You are sweet to attach Prusa to the name, but I never saw a Prusa with an awesome plastic arch!

We are all standing on the shoulders of giants. Most everyone already knows to to be grateful to prusajr (flattr him here: http://www.thingiverse.com/thing:4148)http://www.thingiverse.com/thi...

But no need to worry bout permanent names till she takes a more permanent shape :)

You could add PacManFan's dovetails and plastic "w
orm gears" and call it something like a ThomPac ;)

Thanks for the kind words! Let's see if it works out before I put my name on it.
gt; 8-)

Excellent. And I'm pleased to see a few 100g of stepper motor leave the field too.

Any chance you can limit the sizes of each peice to 140x140x100? I ask as I have a Huxley atm but would love a larger machine and if I can print more then 60% I can get away with it from the other half as I can recycle my exsisting one :)

Once there is a proven working full-size version, I think you can bet that smaller versions will follow hot-on-the-heels!

Looking good! I'm working on a printer design that is mostly plastic as well. I think trying to minimize any and all metal parts is an important goal.

I used a dovetail joint to connect together longer plastic parts. This will further reduce the "vitamins".

Cool! Got an example? I am considering plastic wedges to help eliminate hardware. No solutions, yet.

Take a look at the dovetails on my MultiRep v8. http://www.thingiverse.com/thing:13831http://www.thingiverse.com/thi... . I just did a search for dovetail on Thingiverse and used the scad file. I see you're using Solidworks, you should be able to export the stl from OpenSCAD and import into Solidworks.

MultiRep Version 8 Y-Axis

Looks like a nifty build! I think you are spot on trying to minimize the metal parts! How can it be a self replicating plastic 3D printer if it is 5 lbs of metal!?

Grab a flattr account so I can flattr your design!

We need to reward folks like you trying to improve the design!