Convolve Incorporated

Silent Printer Holdings, LLC

Mark L Tanquary

Neil C Singer

Kenneth Alan Pasch

Bert Whitney Rappole, Jr

Dynamic systems with moving parts, such as printers and image forming apparatuses, for example, can shake as a result of reaction forces related to carriage movement. The characteristics of the shake are related to the particular usage environment and, therefore, can be different for the same dynamic system used in different environments. When the shake of a dynamic system is characterized while the dynamic system is in its particular usage environment, the shake can be reduced, for example, based on a degree of control specified by an operator, for every use in that same environment through adjustments based on the characterization.

Apparatus and method for characterization and control of usage disturbances in a usage environment of printers and other dynamic systems

Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial fraction expansion equation model of the system so as to reduce vibrations to specific levels. Another technique comprises shaping a command determined using the partial fraction expansion equation model to produce a desired output. The entire command may be shaped or only selected portions thereof which produce vibrations. Another technique involves commanding in current to produce saturation in voltage. By doing this it is possible to command voltage switches. The times at which the switches occur can be set to reduce system vibrations. Other techniques are also provided. These include varying transient portions at the beginning, middle and/or end of a move and using Posicast inputs, among others.

Dynamic system control method

Method and apparatus for altering the operation of printers and scanners to reduce vibration and/or acoustics. The technology involves altering the mode of operation of the printer or scanner to be in either 'quick', 'quiet' or an intermediate mode. Additionally, structure for achieving the different modes of operation are also disclosed.

Vibration control technology and interface for computer printers and scanners

Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial fraction expansion equation model of the system so as to reduce vibrations to specific levels. Another technique comprises shaping a command determined using the partial fraction expansion equation model to produce a desired output. The entire command may be shaped or only selected portions thereof which produce vibrations. Another technique involves commanding in current to produce saturation in voltage. By doing this, it is possible to command voltage switches. The times at which the switches occur can be set to reduce system vibrations. Other techniques are also provided. These include varying transient portions at the beginning, middle and/or end of a move and using Posicast inputs, among others.

Data storage device with quick and quiet modes

System for removing selected unwanted frequenices in accordance with altered settings in a user interface of a data storage device

Control system for controlling a dynamic physical system. New, substantially decoupled axes are derived from physical axes of a dynamic system. Closed-loop controllers operate on signals representing the new or synthesized axes to control the coordinate parameters. Control signals are then converted into the original physical axes to generate signals to control the original axes. A preferred embodiment is the application of the control technique to a gantry machine having three degrees of freedom. Actual coordinates are converted to one linear coordinate and one rotational coordinate. The bandwidth of controllers operating on these two coordinates are separated so that crosstalk is diminished and performance improved.

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Needham, MA, United States of America

Mark L Tanquary