This directory treats inkjet systems as the intersection of
MEMS, physics, circuits, and timing causality, and clarifies the
design limits that are already determined before control is even considered.
Ejection performance is determined by the trade-off among
D (Drop) × T (Timing) × S (Stability).
Even when it appears that waveforms are being “controlled,”
causality has already been fixed on the physical side.
A driver circuit is
not a controller, but a part of the physical phenomenon itself.
Inkjet is not a control target,
but the causal structure itself.