Patents Assigned to Renishaw, PLC
  • Patent number: 11415412
    Abstract: A measurement probe is described that includes a probe body, a stylus that is deflectable relative to the probe body, and a plurality of sensor elements for generating a sensor signal indicative of stylus deflection. An analyser is provided, optionally as part of a trigger unit, to analyse the sensor signals and issues a trigger signal to indicate the stylus has contacted an object. The analyser is arranged to combine a plurality of the sensor signals to generate a resultant deflection signal for comparison to a deflection threshold and is also arranged to detect oscillatory motion of the stylus by analysing at least one of the sensor signals. The analyser only issues a trigger signal when the resultant deflection signal crosses the deflection threshold and no oscillatory motion of the stylus is detected. The measurement probe may be used on a machine tool or other coordinate positioning apparatus.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: August 16, 2022
    Assignee: RENISHAW PLC
    Inventors: Jamie John Buckingham, Michael John Wooldridge, Ben Richard Holden, Stephen Peter Ewen
  • Publication number: 20220250152
    Abstract: A powder bed fusion additive manufacturing method includes forming layers of powder of a powder bed and exposing the layers to one or more energy beams to melt the powder to form an object. The exposure of each layer to the or each energy beam forms melt pools in a conduction or transition mode with an exposure distance between adjacent exposures within the layer being 40% to 60% of a width of the melt pools generated by the exposures and an offset of exposures between successively melted layers in a direction in which the exposure distance is measured being 40% to 60% of the exposure distance.
    Type: Application
    Filed: June 8, 2020
    Publication date: August 11, 2022
    Applicant: RENISHAW PLC
    Inventors: Xianglong WANG, Mohammad Attarian SHANDIZ, Jose Alberto Muniz LERMA, Oscar Sanchez MATA, Mathieu BROCHU
  • Publication number: 20220252516
    Abstract: A method of determining components present in a sample from spectral data obtained from the sample including resolving each of a plurality of models of the spectral data, the plurality of models including models having a different number of component reference spectra selected from a set of predetermined component reference spectra; selecting a one of the plurality of models based upon a model selection criterion and determining one or more components present in the sample based upon the selected model. The model selection criterion includes a measure for each model, which balances improvements in fit quality of the model to the spectral data against a complexity penalty determined from the number of component reference spectrum used in the model.
    Type: Application
    Filed: September 1, 2020
    Publication date: August 11, 2022
    Applicant: RENISHAW PLC
    Inventors: Brian John Edward SMITH, Ian Mac BELL
  • Patent number: 11402201
    Abstract: A method of calibrating a contact probe having a deflectable stylus and configured to provide at least one signal which is indicative of the extent of deflection of the stylus, the contact probe being mounted on a coordinate positioning machine which facilitates reorientation of the contact probe about at least one axis. The method includes: taking measurement data obtained with the contact probe positioned at a plurality of different orientations about the at least one axis; and determining from the measurement data at least one gain variation model which models any apparent variation in the gain of the at least one probe signal dependent on the orientation of the contact probe about the at least one axis.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: August 2, 2022
    Assignee: RENISHAW PLC
    Inventors: Martin Simon Rees, Toby John Main, James Arash Shabani
  • Patent number: 11385630
    Abstract: A method of producing a workpiece which is successively loaded onto two or more machine tools and one or more machining operations are performed to produce one or more features of the workpiece on each machine tool. After the machining operations on both or all of the machine tools, the workpiece is passed to a common dimensional inspection station. At the common dimensional inspection station, dimensions of the features of the workpiece produced by the machining operations on the two or more machine tools are measured. Based on the results of measuring the dimensions of the features, two or more output signals are produced which respectively relate to the performance of the two or more machine tools which performed the machining operations. Each of the output signals is fed back to the machine tool which performed the respective operation, to adjust the production process of each corresponding machine tool.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: July 12, 2022
    Assignee: RENISHAW PLC
    Inventor: Kevyn Barry Jonas
  • Patent number: 11385041
    Abstract: A fixturing apparatus is described that can be used with metrology apparatus, such as coordinate measuring machines, flexible gauges and the like. The fixturing apparatus has a base and a plurality of supports extending from the base that are configured to retain an object. At least one of the plurality of supports comprises a floating support having a floating support element that is moveable relative to the base upon contact with an object being loaded into the fixture. A locking mechanism, such as a pneumatic locking mechanism, is provided that can be actuated to immobilise each floating support element relative to the base. The object may have a glass sheet. A corresponding method of fixturing an object is also described.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: July 12, 2022
    Assignee: RENISHAW PLC
    Inventors: Thomas Nigel James Silvey, Ian David Stroud
  • Publication number: 20220203451
    Abstract: A method controls an additive manufacturing apparatus, in which an object is built by consolidating material in a layer-by-layer manner. The method includes receiving commands to be executed by the additive manufacturing apparatus to cause the additive manufacturing apparatus to carry out a build of an object, wherein each command includes an identifier identifying a time during the build at which the command is to be executed, and executing each command on the additive manufacturing apparatus in accordance with the time identified by the associated identifier. Further, an apparatus and a data carrier carry out the method.
    Type: Application
    Filed: March 15, 2022
    Publication date: June 30, 2022
    Applicant: RENISHAW PLC
    Inventors: Ramkumar REVANUR, Ceri BROWN
  • Patent number: 11371830
    Abstract: A method for assessing the profile of a tool using a non-contact tool setting apparatus that includes a transmitter for emitting a light beam and a receiver for receiving the beam. The receiver generates a beam intensity signal describing the intensity of received light. The setting apparatus is mounted to a coordinate positioning apparatus that allows the tool to be moved relative to the setting apparatus. The method includes using the coordinate positioning apparatus to move the tool relative to the setting apparatus along a tool inspection path, the tool inspection path being selected so that the light beam is traced substantially along a periphery of the tool to be inspected. Beam intensity data is collected describing the beam intensity signal that is generated by the receiver as the tool inspection path is traversed and analysis of the collected beam intensity data is used to assess the tool profile.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: June 28, 2022
    Assignee: RENISHAW PLC
    Inventors: William Ernest Lee, Paul Maxted
  • Publication number: 20220184765
    Abstract: A method including: a) causing a tool mounted on a machine tool to work on a workpiece, and at least one sensor, which is configured to measure one or more aspects of the tool and/or machine tool, collecting sensor data during said working; b) a measurement device inspecting the part of the workpiece that was worked on at step a) to obtain measurement data; and c) calculating sensor-to-workpiece data calibration information from the sensor data and the measurement data.
    Type: Application
    Filed: March 11, 2020
    Publication date: June 16, 2022
    Applicant: RENISHAW PLC
    Inventors: Paul MAXTED, James Arthur HARTLEY
  • Patent number: 11358224
    Abstract: A module for an additive manufacturing apparatus including more than one optical train, each optical train providing a route for a laser beam to pass through the module and including steering optics for steering the laser beam towards the material to be consolidated as part of a layer-by-layer additive manufacturing process. The module is configured to deliver laser beams from the more than one optical trains through a single window in a build chamber of the additive manufacturing apparatus.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: June 14, 2022
    Assignee: RENISHAW PLC
    Inventor: Ceri Brown
  • Publication number: 20220178885
    Abstract: An ultrasound probe is described that comprises a transducer for transmitting and receiving ultrasound. The probe also includes a coupling element, such as a spherical ball of self-lubricating or hydrogel material, for contacting and acoustically coupling to an object to be inspected. The ultrasound probe also includes an analyser that is arranged to analyse the ultrasound signal received by the transducer and thereby determine if there is contact between the coupling element, and the surface of an object. The probe can thus be used for internal (ultrasound) inspection of objects as well as measuring the position of points on the surface of the object. The probe may be mountable to a coordinate measuring machine or other moveable platforms.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 9, 2022
    Applicant: RENISHAW PLC
    Inventor: Liam HALL
  • Publication number: 20220176454
    Abstract: An additive manufacturing powder recirculation apparatus including: a powder recirculation loop having: an inlet for receiving powder from an additive manufacture apparatus; an outlet for supplying powder to the additive manufacture apparatus; and a powder flow path extending between the inlet and outlet. A diverter valve in the powder flow path is configured to selectively place the powder flow in fluid communication with either the downstream powder recirculation loop or a hopper outside of the powder recirculation loop.
    Type: Application
    Filed: April 29, 2020
    Publication date: June 9, 2022
    Applicant: RENISHAW PLC
    Inventors: David Edward BEEBY, David John WHITTON
  • Publication number: 20220178670
    Abstract: A coordinate positioning machine includes a drive frame and a metrology frame. The drive frame includes a drive arrangement for moving a structure around a working volume of the machine. The metrology frame includes a metrology arrangement for measuring the position of the structure within the working volume. The metrology arrangement is a hexapod metrology arrangement and the drive arrangement is a non-hexapod drive arrangement. The metrology frame has a coefficient of thermal expansion that is lower than that of the drive frame. The drive frame is coupled to the metrology frame via a coupling arrangement which prevents at least some distortion associated with any extra thermal expansion and contraction of the drive frame from being transferred to the metrology frame. The drive arrangement moves the structure around the working volume, and the metrology arrangement measures the position of the structure within the working volume.
    Type: Application
    Filed: March 20, 2020
    Publication date: June 9, 2022
    Applicant: RENISHAW PLC
    Inventor: Stephen Mark ANGOOD
  • Patent number: 11353342
    Abstract: A shadow-cast encoder apparatus includes a scale and a readhead. The readhead includes at least one electromagnetic radiation source for illuminating the scale in order to produce a shadow-cast fringe pattern at a detector configured to detect the shadow-cast fringe pattern. The encoder apparatus can be configured so as to suppress the total harmonic distortion of the fringe pattern, e.g. such that the total harmonic distortion of the fringe pattern is not more than 6%.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: June 7, 2022
    Assignee: RENISHAW PLC
    Inventor: Alexander David McKendrick
  • Publication number: 20220168813
    Abstract: A method of aligning an on-axis melt pool sensor in an additive manufacturing apparatus. The method includes scanning a first laser beam along a first scan path across a working surface using a first optical train to generate a melt pool along the first scan path and scanning a field of view of an on-axis sensor along a second scan path across the working surface using a second optical train for steering a second laser beam. The first and second scan paths intersect. An adjustment to be made to an alignment of the field of view of the on-axis sensor with an optical axis of the second optical train is determined from a variation in the signal generated by the on-axis sensor as the field of view is scanned along the second scan path.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 2, 2022
    Applicant: RENISHAW PLC
    Inventors: John DARDIS, Ceri BROWN, Jonathan MANSELL
  • Patent number: 11326869
    Abstract: A surface finish stylus and associated methods for a multi-directional scanning probe the stylus having an elongate stylus shaft having a longitudinal axis and one or more contact elements protruding from the elongate shaft for contacting a surface to be measured. The one or more contact elements are configured to enable measurement of surface finish during motion of the stylus shaft relative to a surface along a measurement direction that is non-parallel to the longitudinal axis. The multi-directional scanning probe may be carried by a coordinate measuring machine or machine tool.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: May 10, 2022
    Assignee: RENISHAW PLC
    Inventors: Stephen Edward Lummes, Mark James Andrew Holmes
  • Patent number: 11325188
    Abstract: This invention concerns an additive manufacturing apparatus for building objects by layerwise consolidation of material. The apparatus includes a build chamber containing a working area, a high energy beam for consolidating material deposited in the working area in layers and a flow device for generating a gas flow across at least a part of the working area from a gas inlet to a gas outlet. The gas inlet and gas outlet are arranged to be movable within the build chamber.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: May 10, 2022
    Assignee: RENISHAW PLC
    Inventors: David Roberts McMurtry, Marc Dimter, Ralph Mayer
  • Publication number: 20220137005
    Abstract: A method of calibrating an ultrasound probe having a coupling element for engaging the surface of an object to be inspected, in which the ultrasound probe and a calibration artefact are provided on a positioning apparatus having at least one axis about which the relative orientation of the ultrasound probe and calibration artefact can be changed, the method including, in any suitable order: i) for a plurality of different relative orientations between the ultrasound probe and the calibration artefact about the at least one axis, measuring the signal received by the ultrasound probe; and ii) from the measurements, determining at least one calibration parameter which is indicative of at least one axis of optimum signal of the ultrasound probe, and recording the at least one calibration parameter for subsequent use.
    Type: Application
    Filed: February 17, 2020
    Publication date: May 5, 2022
    Applicant: RENISHAW PLC
    Inventors: Liam David HALL, Yining DING
  • Publication number: 20220134433
    Abstract: A method of powder bed fusion additive manufacture includes forming a component in a powder bed in a layer-by-layer process. The method may include sintering, without melting, selected regions of powder with an energy beam to form at least one support adjacent to the component; and melting further selected regions of the powder bed with an energy beam to form a component by layer-by-layer melting of material. The method may include directing an energy beam at selected regions of powder to form a friable support, the friable support including bonded powder which act as a solid and provide compressive support; and melting further regions of the powder bed with an energy beam to form a component by layer-by-layer melting of material.
    Type: Application
    Filed: March 10, 2020
    Publication date: May 5, 2022
    Applicant: RENISHAW PLC
    Inventors: Geoffrey McFARLAND, Andrew David WESCOTT
  • Patent number: 11305354
    Abstract: A method controls an additive manufacturing apparatus, in which an object is built by consolidating material in a layer-by-layer manner. The method includes receiving commands to be executed by the additive manufacturing apparatus to cause the additive manufacturing apparatus to carry out a build of an object, wherein each command includes an identifier identifying a time during the build at which the command is to be executed, and executing each command on the additive manufacturing apparatus in accordance with the time identified by the associated identifier. Further, an apparatus and a data carrier carry out the method.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: April 19, 2022
    Assignee: RENISHAW PLC
    Inventors: Ramkumar Revanur, Ceri Brown