Digital Sign Technologies unveiled an innovative method for real-time nozzle diagnostics at FESPA 2025. Called drop watching, this new approach enables precise observation of ink droplet formation — all while the printhead is being cleaned on the Print Head Doctor (PHD) system. What Is Drop Watching? Drop watching  is a non-print-based method  of testing printhead nozzles. Instead of relying on printed test patterns or fluid curtains, this technique allows you to directly obs