A couple months ago, myself and some other hacklabers branched the Prusa Mendel RepRap and started working on it. I wanted to post about a cool feature Rob and me have been working on.
Well, its actually 3 interconnected features. The first is that configurations for the hacklab reprap include configurability of the build volume:
// Build Volume Settings //================= //The x,y and z printable dimensions in that order build_volume = [100,100,80];
Of course, vertices had to be redesigned to accommodate different x:z ratios. When making the new parametric designs, we redesigned the entire thing. In the process, we reduced size, reprap size and (naturally) build time.
Notice not only the size difference but how the old one takes up space by leaning back. This is especially noticeable if, like Rob, you are making a miniature version.
And of course, the old one can’t be an arbitrary angle.
And I think this configuration emphasises the size difference:
And that’s before we compare against the Mendel vertices.
Look at how much thicker that thing is!
In fact, the new ones are so much smaller than the old ones that four can fit on a single ABP (BTW, thanks to makerbot for giving Rob the freebie! They’re pretty awesome, and having a loose one made it a lot easier to figure out how to fit them on the platform.)
I’m pretty sure that you could fit another vertex on there. As for the top… Well lets look at the original set up
Originally, the top was three separate pieces. This really didn’t make sense, so I made it into one piece.
The new top vertex is actually just our new version of the z-motor-mount part. Since it integrates 3 parts in to one and there are two instances of it in the reprap, it cuts the part count down by 4 parts. The above images is with a vertex angle of 80 (and thus the top is 20), so it also exemplifies the new configurable angle set up. Yay openscad!
Here is a 60 degree one on my RepRap:
We have exciting plans for the future. Just in this stream, we’re planning to have the build process include custom documentation for your configurations (including the rod lengths necessary to get the build volume you want) and 3d models of the assembled RepRap with your specifications. Look at our github repository to see the other cool features we’re working, including single top rods, threaded rod instead of belts and lots of other cool things!