Power Distribution Boards

Machine Power Routing is a DAG. In this implementation we 'route' power at nodes that comprise our PDB sets - these contain branching nodes, thru- nodes, as well as BFC nodes and a Bleeder / TVS node. Also: a 5V regulator node, for 2A. Of which multiples can exist in the tree, tapping 24v for 5. We can think of the core of our tree as the GND line - this should have one single source, but can branch. Power lines (24v, 5v) can have roots anywhere in the graph, adjacent to the GND tree, but must be sub- DAGs. This way, we can have multiple 24V PSUs working on the same system, so long as their GND lines share a root - but they cannot load share on single loads. Since things are modules, though, it should be easy to split 1/2 power load to one PSU, the rest to the other, etc. Also, for big tickets, like a spindle, we can have dedicated PSUs and dedicated branches of the tree. OK.

psu-mw350

Root!

pdb-3

Branch!

pdb-bfc

Big Capacitance!

pdb-bleeder

Bleed off big capacitance, include TVS diode to eat nasty spikes.

pdb-5vreg

Peel 5v from 24v!