Not true. Multi-material printer heads have been around for going on a decade now. But THIN layers imply vapor-deposition - a somewhat different process than using ink-jet heads or laser sintering. OTOH, vapor-deposition should be integratable into an all-up fabber.GIThruster wrote:I've had my eye on 3D printing since it was called laser sintering and applied to the ceramics we're always interested in. The problem is that in all likelihood, the geometry we would use is based upon many, very-thin layers of ceramic separated by electrodes. 3D printing only applies to items constructed all of the same material.
Bootstrap up to an equivalent starting from a RepRap or similar? I do love the ISRU philosophy.GIThruster wrote:But yeah, we even identified the kind of laser sintering machine we'd need to do our own in house work. Lock-Mart has one. they're $1 Million each. Only superficially like your $500 3D printer.
Practical 3D printers don't need to produce bleeding-edge; they just need to produce good-enough. They can extrude fiber-reinforced polymers or even amorphous metals as structural basics, for one.
In addition to RepRap, I almost think there needs to be an Open-Source Everything project for simplified but robust and capable versions of other modern basics.
Open Source Operating System
Open Source Hardware
Open Source Medical (a potentially VAST topic)
etc.