摘要:
Apparatus including a plurality of droplet ejection devices, an electric source and a controller (20). Each droplet ejection device (860) includes switches (Sc1, Sc2, … ScN) connected in parallel to a piezoelectric actuator (c). Each switch includes an input terminal to connect to an input waveform (Xv) signal, an output terminal to connect to the piezoelectric actuator, a control signal terminal to control a connection of the switch with a control signal, and a resistance (Rc1, Rc2, …RcN) between the input terminal and output terminal. The apparatus has a waveform table with information to distribute the input waveform signal to an input of each of the droplet ejection devices. The waveform signal table includes waveform signal information for a step pulse, a sawtooth waveform, and/or a combination of two or more waveform patterns.
摘要:
A method of calibrating a micro electro-mechanical device in the form of an ink ejection nozzle having an actuating arm that is caused to move an ink displacing paddle when heat inducing electric current is passed through the actuating arm and having also a movement sensor associated with the actuating arm. The method comprises the steps of passing a series of current pulses of successively increasing duration tp through the actuating arm over a time period t, detecting for a predetermined level of movement of the actuating arm within a predetermined time window tw, and calibrating the device for subsequent actuation by a current pulse having a duration tp sufficient to produce the predetermined level of movement within the predetermined time window tw.
摘要:
A method of detecting a fault within a micro electro-mechanical device in the form of an ink ejection nozzle having an actuating arm that moves an ink displacing paddle when heat inducing electric current is passed through the actuating arm and having a movement sensor associated with the actuating arm. The method comprises the steps of passing at least one current pulse having a predetermined duration through the actuating arm and detecting for a predetermined level of movement of the actuating arm. If a fault is detected to exist, as indicated by an insufficient level of movement of the actuating arm, at least one further current pulse having an energy level greater than the fault detecting pulse may be passed through the actuating arm in an attempt to clear the fault.
摘要:
An ink jet printer includes an ink supply system and a printhead with nozzles for ejecting ink drops. The printer determines the average size of the ejected ink drops by comparing the number of ink drops ejected in a predetermined time with the quantity of ink delivered through the printers ink supply system during that time. If the determined average ink drop size does not match predetermined ink drop size criteria, the printer adjusts the activation signals for the ink jet nozzles to alter the ink drop size. A solid ink printer determines the quantity of ink delivered through the ink supply system by counting the number of whole or partial ink sticks that pass a predetermined point in the ink supply system. The counter detects a sensing element formed on an external surface of the ink stick. Exemplary detectors include a mechanical arm, or a thermistor to detect a change in the printer melt plate temperature due to a change in the cross sectional area of an ink stick being melted.
摘要:
Apparatus including a plurality of droplet ejection devices, an electric source and a controller (20). Each droplet ejection device (860) includes switches (Sc1, Sc2, … ScN) connected in parallel to a piezoelectric actuator (c). Each switch includes an input terminal to connect to an input waveform (Xv) signal, an output terminal to connect to the piezoelectric actuator, a control signal terminal to control a connection of the switch with a control signal, and a resistance (Rc1, Rc2, …RcN) between the input terminal and output terminal. The apparatus has a waveform table with information to distribute the input waveform signal to an input of each of the droplet ejection devices. The waveform signal table includes waveform signal information for a step pulse, a sawtooth waveform, and/or a combination of two or more waveform patterns.
摘要:
A printing compensating for a jetting amount for each of multiple types of ink drops with different sizes, wherein dot data can be generated so as to compensate for the error of ink amount for each of specified types of ink drops according to the information indicating the errors of the ink amounts of the specified types of ink drops for at least one of the specified types of ink drops among the multiple types of ink drops with different ink amounts, whereby a color can be accurately reproduced even if the error of the ink amount for each of the different types of ink drops is dispersed.
摘要:
A printing apparatus having a plurality of printing elements connected to a common power supply, each printing element (R1) is provided with a switching element (Q1) connected to the printing element in series for controlling driving of the printing element with a voltage applied to a control terminal; a constant voltage source (VR1) using the power supply as a standard, and a voltage control circuit (101) for controlling the terminal-to-terminal potential difference of the printing element to be equal to a voltage of the constant voltage source, when the printing element is driven, and when storage, driving signals to be supplied to each printing element are controlled so that energy amount consumed by each printing element is equal. Thereby a consumed energy amount in each printing element, that is, an energy amount generated at the time of driving becomes constant regardless of external conditions and environments of the printhead, resulting in high image quality storage.