ooterness

The provided link is broken, but I was able to fix it.

There is only one valid response to that command.

Can you really trust a velociraptor to answer that question honestly??

Best prank...or worst prank ever in the history of pranks?

Correlated Magnetics has a number of patents on this technology. The best part about patents is that all those documents are publicly available. Check out US patent 8,179,219.

Magnetizing a rare-earth magnet in the desired direction requires a crazy strong magnetic field. To make the magnetic pixels, those fields need to be very local. The trick to both is to use the coil structure shown in Fig. 70. My lawyerese is a bit rusty, but I think this is the general idea:

Basically the print-head is an electromagnet made from a stack of thick conductive discs. Each disc has a small hole in the middle and a slot, like in the figure. If you put nonconductive material between the discs in the stack, but allow current to flow in a small region next to each slot, you force the current to flow around the long way in each disc. Topologically it's just like a regular helical electromagnet made with wire, but now it's thick enough you can put hundreds (thousands?) of amps through it without melting or shattering. Secondly, the field strength is greatly concentrated in the hole in the middle of that stack, which you can make very small.

So now you have a very strong electromagnet with a very small working area, perfect for making the magnetic pixels in your polymagnet.