Does it use some high-distance sensor fusion, it only prints things smaller than those builtin rails, or it just assumes wheels never lose traction and fails on every print?
How is the adherence of a random household floor? Does it require some kind of wax or it fails on every print?
Again, how is the adherence of a random household floor? Can objects be removed after printing? Because if you expect models to be correct on the first try, you'll fail on every print.
I'm sure I can fix a "why?" somewhere among the questions, but the "how?" is so interesting it would only waste space.
It's a step in a new direction, a proof of concept. Maybe in the future something similar could be useful for road work or on mars or idk. No innovation & development without experimenting. You have to start somewhere and with stuff that is available.
And even if nothing comes of it, I bet it was a fun project to work on.
Honestly, If it is ever made to work. A mobile/robotic 3d printer would be a huge step forward. Solving the issue of levelling on more random surfaces, IE all existing surfaces. Plus the Issue of moving heat stability with different plastics. It all sounds doable in an open design way. But hugely complex and in need of this type of nutcase to start it off.
But the advantages it would give to home-maker like design would be freaking huge once things become well understood. Adding already developing multi mateial heads etc.
As I have said elsewhere. Never underestimate the value of someone insane enough to try and make dumb shit work. Almost everything we depend on started from someone thinking the most insane idea would be fun to try.
The worst of both worlds, good luck getting a decent print on something moving and good luck vacuuming anything with a giant thing on top of it. It would be lucky just to not to get caught on anything