METHOD AND APPARATUS FOR MEASURING RESPONSE TO ACTUATION OF ELECTRO-MECHANICAL TRANSDUCER IN PRINT HEAD ASSEMBLY FOR INKJET PRINTING SYSTEM

摘要

A measurement device for measuring a response to actuation of an electro-mechanical transducer in a print head assembly for an inkjet printing system includes a sensing circuit and a measurement circuit. The sensing circuit provides a path to system ground for the transducer. The transducer is associated with an ink chamber in the print head assembly. The transducer is configured to transfer energy to contents of the chamber in response to an actuation of the transducer in conjunction with electronics controller and waveform amplifier modules of the printing system. The measurement circuit monitors a ground signal at a transducer-side of the sensing circuit and a reference signal at a system ground-side of the sensing circuit. The measurement circuit generates a difference signal indicative of a difference between the ground and reference signals. Various embodiments of methods for measuring the response and additional embodiments of devices are provided.

主权项

1. A method for measuring a response to actuation of an electro-mechanical transducer in a print head assembly for an inkjet printing system, comprising:
providing at least a portion of a return path to system ground for an electro-mechanical transducer through a sensing circuit, wherein the electro-mechanical transducer is associated with an ink chamber in a print head assembly for an inkjet printing system, wherein the electro-mechanical transducer is configured to transfer energy to contents of the ink chamber in response to an actuation of the electro-mechanical transducer in conjunction with electronics controller and waveform amplifier modules of the inkjet printing system; monitoring a ground signal at an electro-mechanical transducer-side of the sensing circuit; monitoring a reference signal at a system ground-side of the sensing circuit; and generating a difference signal indicative of a difference between the ground and reference signals.