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people have inkjetted solder bumps for C4 type chip bonding for 10+ years.
http://www.microfab.com/archive/about/p ... jmep98.htm
http://iopscience.iop.org/0960-1317/19/12/125021

the hyrel 3d extruder is the basic design used for a lot of syringe pumps, where a motor drives the plunger. It is more of an industrial solution and ends up being pretty large, and from the looks of theirs pretty heavy. It will work well with highly viscous substances. For example, they have shown ...

A lot of it depends on the surface finish you are needing. Solidscape (owned by Stratasys) makes wax printers that can be used for jewelry making, among other applications. Printing a wax shape will give a much smoother surface than printing from a slurry. Then you can use the "lost wax" technique ...

I was checking out a video on the MIT Hobby Shop, and noticed that they have recently built a Rostock Max (see at the 1:06 mark, and at 4:23). Most of the video is about the machine shop history and philosophy. If MIT students can build a Rostock max, anyone can. ;) [youtube]http://www.youtube.com ...

Jim, I knew from your postings you were also at ND. I figured I would lay low until we were up and running. John told me about the Makerspace. I might be too lazy to make it over in the near term, but later in the fall I will come over. If you want to see the ceramic machine some time during the day ...

yes, those are Xnaron arms. We used his stl's and made one set of arms and 2 effectors. One for clay and the other for the plastic hot end.

I have been directing a couple of undergraduate students in an effort to adapt a Rostock Max for printing of ceramics and slurries. We picked up a Rostock Max in early June, as SeeMeCNC is only a 30 min. drive from us (Notre Dame). I got to meet John and Steve and see their operation (thanks guys ...

I thought folks here might be interested in a modification we made to introduce a clay/paste extruder to a Rostock Max. We want to develop technology for inexpensive 3D ceramic printing for artists. Ultimately we want to extend this to art programs at other universities, and even to high schools ...