geneb wrote:Speed. They all print about the same, but the delta design wins hands down when it comes to rapid, non-print moves. It's also not shaking the part all over the place during a print.
g.
That's not true of most cartesian designs with cantilevered beds, and mechanisms like the Ultimaker or Zortrax are capable of similar speeds and acellerations to even the best deltas (at least in X and Y).
Having said that one of the better rated printers (price vs performance) recently has been the Original Prusa I3 Mk2 and that has a moving bed, and shakes the part around as you say.
The speed issue is really over stated these says, the original rostock vs a home built Mendel there was probably a win there, if only because most Mendels were direct extrusion, rather than using a bowden setup.
The one place deltas still win in theory is Z moves.
EDIT
I realize I'm coming off pretty negatively here, it isn't my intention. The RMax is a very good printer, but t annoys me when I see people have unrealistic expectation of totally hassle free printing reinforced, because they are invariably disappointed. The fact is any printer you build from a kit will likely have some teething issues, they will probably be worse on a delta design because the builder likely has no intuition as to what build errors/calibration issues result in what problems in the print or even carriage motion. Auto cal takes a lot of that away, assuming the build is mechanically sound, but it's not a panacea.
I've spent a lot of time over the last 5 years designing, building, purchasing and using various 3D printers, and my current view is that the delta design really does not offer any significant advantage over a cartesian design, but does introduce a great deal of calibration complexity.
Both Cartesian and Delta printers can produce similar results at similar speeds, and in fact my current go to printer is a delta.