A device for measuring a force applied to a component when the component is being bonded to a component carrier, or when the component is being encapsulated includes a deformable portion and a contacting stem connected to the deformable portion. The deformable portion is configured to incorporate a sensor for detecting a degree of deformation of the deformable portion caused by application of the force in order to measure the force. In use, the contacting stem is positionable to contact the component or the component carrier so that the deformable portion is deformed when the force is applied to the component. One or more such devices may be included in a sintering or encapsulation apparatus for measuring the said force.

Disclosed herein is an apparatus (100) for making a stereolithographic object (122). Also disclosed herein are methods for making a stereolithographic object (122), a method for locating the position of debris, a method for characterising the viscosity of the material (104), and a method for monitoring consumption of a material (104) for making a stereolithographic object (122).

An apparatus is disclosed. The apparatus comprises a transducer to transform a load in the housing to an electric current, upon receipt of a load exceeding a load threshold. The apparatus further comprises a light source coupled to the transducer to emit light upon receiving the electric current.

Techniques for directing light from a movable stage in an additive fabrication device are provided. According to some aspects, the movable stage may include a parabolic mirror onto which light may be directed at various different incident angles to produce light along different positions along an axis. In some cases, this axis may be perpendicular to a direction of motion of the movable stage.

Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.

Provided is a substrate cleaning device, an abnormality determination method of a substrate cleaning device, and an abnormality determination program of a substrate cleaning device for determining whether there is an abnormality in a roll cleaning member that is attached. A substrate cleaning device includes: a holder to which a roll cleaning member for cleaning a substrate is attached in a detachable manner; a rotation device which makes the roll cleaning member attached to the holder rotate; a sensor which measures information concerning a vibration of the roll cleaning member during rotation; and a control device which determines, based on a measurement result of the sensor, whether there is an abnormality in the roll cleaning member attached to the holder.

A method of measuring the viscosity of a resin in a bottom-up additive manufacturing apparatus, includes the steps of: (a) providing an additive manufacturing apparatus including a build platform and a light transmissive window, said build platform and said window defining a build region there between, with said window carrying a resin; (b) advancing said build platform and said window towards one another until said build platform contacts said resin; (c) detecting the force exerted on said build platform by said resin; and (d) generating in a processor a viscosity measure of said resin from said detected force.

The present invention discloses a flexible temperature-sensitive pressure sensor based on nanoparticle array quantum conductance, and an assembly method and application thereof. The sensor includes a high polymer film, metal nanoparticle arrays, metal microelectrodes, and an external circuit for conductance measurement; at least one group of metal nanoparticle arrays are deposited on upper and lower surfaces of the high polymer film, and in the same group, positions of metal nanoparticle arrays on the upper and lower surfaces are in one-to-one correspondence; the metal microelectrodes are arranged on two sides of each group of metal nanoparticle arrays and are symmetrically distributed on the upper and lower surfaces of the high polymer film; and the external circuit for conductance measurement is electrically connected to the metal microelectrodes. Conductance response signals of the nanoparticle arrays in the present invention have an exponential relationship with a distance between particles.

A method of measuring the viscosity of a resin in a bottom-up additive manufacturing apparatus, includes the steps of: (a) providing an additive manufacturing apparatus including a build platform and a light transmissive window, said build platform and said window defining a build region there between, with said window carrying a resin; (b) advancing said build platform and said window towards one another until said build platform contacts said resin; (c) detecting the force exerted on said build platform by said resin; and (d) generating in a processor a viscosity measure of said resin from said detected force.

An object can be made one section at a time, that is layerwise, using an apparatus for making an object using a stereolithographic method. Disclosure generally relates to an apparatus for making a stereolithographic object and a method for making a stereolithographic object. An apparatus (100) for making an object (122) is disclosed.