A cleaning device includes a protection cover, a vibrator, a piezoelectric driver, and a signal processing circuit. When the signal processing circuit determines that foreign matter is adhered to a surface of the protection cover, it controls the piezoelectric driver such that vibration of the protection cover has a vibration acceleration of about 1.5×10.sup.5 m/s.sup.2. When the signal processing circuit determines that the foreign matter is adhered to the surface of the protection cover when control of the driver such that vibration of the protection cover has a prescribed vibration acceleration, the protection cover is warmed with a warmer. After the protection cover is warmed, the signal processing circuit controls the piezoelectric driver such that vibration of the protection cover has a resonant frequency.

A cleaning device includes a protection cover, a vibrator, a piezoelectric driver, and a signal processing circuit. When the signal processing circuit determines that foreign matter is adhered to a surface of the protection cover, it controls the piezoelectric driver such that vibration of the protection cover has a vibration acceleration of about 1.5×10.sup.5 m/s.sup.2. When the signal processing circuit determines that the foreign matter is adhered to the surface of the protection cover when control of the driver such that vibration of the protection cover has a prescribed vibration acceleration, the protection cover is warmed with a warmer. After the protection cover is warmed, the signal processing circuit controls the piezoelectric driver such that vibration of the protection cover has a resonant frequency.

A method of separating excess resin from at least one object, includes: (a) stereolithographically producing at least one object on at least one carrier platform, each carrier platform having a planar build surface to which at least one object is connected, each object carrying excess resin on a surface thereof; then (b) mounting each carrier platform to a rotor; (c) centrifugally separating excess resin from each object by spinning the rotor with each carrier platform connected thereto while each object remains connected to each carrier platform; and then (d) removing each carrier platform from the rotor with each object thereon, with excess resin separated therefrom.

A method and system for removing material build-up in a mixing chamber of a rotary mixer machine. The system includes one or more actuators coupled to the mixing chamber and to a frame of the rotary mixer machine. Further, the system includes a controller configured to receive an input and activate the one or more actuators in response to the input to induce a forward and backward rocking motion in the mixing chamber to cause a dislodgement of the material build-up from the mixing chamber. The mixing chamber executes the forward and backward rocking motion between a first position and a second position about an axis disposed transversally to a length of the rotary mixer machine.

A method and system for removing material build-up in a mixing chamber of a rotary mixer machine. The system includes one or more actuators coupled to the mixing chamber and to a frame of the rotary mixer machine. Further, the system includes a controller configured to receive an input and activate the one or more actuators in response to the input to induce a forward and backward rocking motion in the mixing chamber to cause a dislodgement of the material build-up from the mixing chamber. The mixing chamber executes the forward and backward rocking motion between a first position and a second position about an axis disposed transversally to a length of the rotary mixer machine.

Included are methods and systems for recycling a gas emitted from non-aqueous cleaning. An example method includes contacting a contaminated equipment with a non-aqueous cleaning material; wherein the spent non-aqueous cleaning material emits the gas. The method further comprises capturing the emitted gas, filtering the emitted gas, and recycling the emitted gas into the non-aqueous cleaning material.

A sensor system includes: a housing having an internal wall defining an opening; a transparent window mounted within the opening; a sensor device within the housing and having at least one of a sensor output or a sensor input alignable with the transparent window; a vibration device in communication with the transparent window, where the vibration device is controllable to produce a first sonic movement; where the transparent window is movably responsive to the first sonic movement with a second sonic movement; and at least one damping member located between the transparent window and the sensor device, where the damping member substantially isolates the sensor device from at least the second sonic movement of the transparent window. A method includes determining a cleaning trigger corresponding to cleaning the transparent window; and controlling, in response to the cleaning trigger, a vibration frequency, amplitude, or duration of the vibration device.

A method for cleaning an object includes steps of delivering a cleaning medium to a surface of the object, delivering ultrasonic waves to the object to atomize the cleaning medium, and applying a vacuum airflow to collect atomized cleaning medium.

A mobile device comprising: a display; a first sensor to detect a cloth approaching a surface of the display; an ultrasonic emitter to emit ultrasonic waves towards the cloth; a second sensor to track a pressure a user exerts on the surface of the display; and a processing unit to: determine if the material of the cloth is hard or soft; in response to the material being hard, alert the user that the cloth is not appropriate to clean the surface of the display; and alert the user that the entire display was not cleaned with the cloth.

A system and method for removing residual powder from an additively manufactured object is provided, wherein one or more additively manufactured parts covered by loose residual powder are loaded into a chamber. The residual powder is blown off the surface of the object with one or more streams of high-pressure gas. A vacuum is pulled on the chamber with a vacuum pump to reduce or remove air resistance within the chamber and cause the particles to fall out of suspension, e.g., to the bottom of the chamber or into a collection vessel, under the influence of gravity.