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Class 33/702 - Error compensation (e.g., temperature)


Subclass of Class 33 - Geometrical instruments
Definition: Subject matter which includes structure to make a correction
No. of patents: 137
Last issue date: 03/27/2012


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NumberTitleIssue Date
8141264Length reference bar system and method
A length reference bar system and method that compensates for thermal expansion and allows for testing whether an instrument is working properly using only an inferometer. The length reference bar system has a bar portion with end caps for target positions on either...
03/27/2012
7587840Dimension measuring apparatus and dimension measuring method
A dimension measuring apparatus 1 which measures a dimension of a measurement subject 2 includes a conveying device 5 which convey the measurement subject 2, a temperature controlling device which control the temperature in a conveyance r...
09/15/2009
7400990Method for performing a function test of a position measuring system and position measuring system for executing the method
A method for performing a functional test of a position measuring system, which in the course of scanning a scale by a position measuring unit generates position values. The method includes generating a control value in the position measuring system, the control val...
07/15/2008
7395604Laser level with temperature control device and temperature control method thereof
A laser level with temperature control device (2) and the temperature control method thereof are disclosed. The temperature control device includes a thermal insulation chamber (22), a thermoelectric cooler (25), a control unit (21), and ...
07/08/2008
7354386Thermal displacement correcting device
Machine-tool thermal displacement correcting device having: a tool-temperature estimating unit for recognizing—based on identification data obtained from a controller for designating, out of tools stowed in the tool-changer tool magazine, an exchange-target toolâ€...
04/08/2008
7340844Device for mounting a position measuring device onto a machine tool, and position measuring system
A bracket set is for mounting an encoder device to a machine tool. The bracket set includes a first connector connectable to the machine tool; a first member adjustably connected to the first connector, a longitudinal axis of the first member arranged transverse to ...
03/11/2008
7299562Device and method for mounting a position measuring device onto a machine tool, and position measuring system
A device for mounting a position measuring device onto a machine tool includes at least one hanger tool, e.g., two hanger tools. Each hanger tool includes: a bracket detachably attachable to a housing of the position measuring device, e.g., at a respective end of th...
11/27/2007
7285793Coordinate tracking system, apparatus and method of use
A system enables indirect determination of a position vector (VR) of a point position (P). The system uses two fixed trackers (10 and 10′) whose absolute positions are known. A movable measuring device (20) provides a rigid rod (...
10/23/2007
7281339Encoder system
A structure and associated method to accurately read an encoder tape in an encoder system. The encoder system comprises, a read head, a shoe structure adjacent the read head, and an encoder tape. The encoder tape is adapted to be read by the read head. The shoe stru...
10/16/2007
7266903Method for correcting thermal displacement in a machine tool
A thermal displacement correction method is provided, including the steps of presetting coordinate data for a fixed position of a workpiece on a table, finding an amount of displacement of the fixed position of the workpiece at a current cutting edge position based ...
09/11/2007
7245982System and process for measuring, compensating and testing numerically controlled machine tool heads and/or tables
A system and a process are disclosed, that are automated and integrated with numerically controlled systems, for measuring, compensating and testing numerically controlled machine tool heads (1) and/or tables. The system comprises: at least one support base (...
07/17/2007
7225555Linear scale attachment device and attachment method
A linear scale attachment device for holding and securely attaching a linear scale on an object to be measured is disclosed. The device includes an aluminum base formed with a holding groove having a larger opening than the width of a linear scale that is fitted in ...
06/05/2007
7216519Strain monitoring for part quality analysis
A device for determining the quality of a part includes a sensor for detecting a strain on a selected portion of a part forming machine. A controller utilizes the detected amount of strain to make a determination regarding the quality of a corresponding part. In one...
05/15/2007
7210239Slider device and measuring instrument
A slider device (200, 800) according to the present invention includes a base (200); a running head (300) slidably provided on said base (200) along the direction guided by a prespecified guide mechanism (400); a rack (510) ...
05/01/2007
7193731Optical displacement sensor
Optical displacement sensor may possess light-emitting element(s) for projecting light onto distance measurement target(s), and light-receiving element(s) capable of receiving light reflected from distance measurement target(s) and disposed such that light-receiving...
03/20/2007
7191541Temperature compensation system for a coordinate measuring machine
A machine, such as a coordinate measuring machine, having a component or element movable with respect to a support structure along rails or guideways, wherein the rails have a coefficient of thermal expansion that is different from that of the support structure to w...
03/20/2007
7188433Sensor and method of mounting it
What is described is a structural part comprising a mounting surface (M) for mounting the mounting surface to an attachment surface, wherein means for adhesive-bonding the mounting surface (M) with the attachment surface are provided, in order to glue the structural...
03/13/2007
7188432Correction of the temperature error during a measurement conducted by a coordinate measuring device
The discovered temperature of the feeler is regularly determined and is recorded together with the associated calibrating data at this temperature. Temperature correction data for the feeler are established from this historic collection consisting of temperature val...
03/13/2007
7185444Modular scanning unit of a position measuring system
A modular scanning unit for a position measuring system and including a support having a recess with a guide surface and a holder adjustably supported upon the support, wherein the holder has a light source and a beam-shaping device aligned with the light source. A ...
03/06/2007
7117110Measuring method and measuring apparatus
In a measuring apparatus, a plurality of design values in design values substituted in the correction computation equations for correcting a geometrical measurement error inherent in the measuring apparatus are set as variables, the variables are optimized by a nume...
10/03/2006
7110194Spherical retro-reflector mount negative
A sphere mount for a ball mounted retro-reflector having a perimeter recess and a base shank. The sphere mount is configured to receive a ball mounted retro-reflector in a centrally disposed conical nest, such as a three-point conical nest, and to position it with a...
09/19/2006
7059063Flexible coupling to accommodate thermal expansion and contraction in a coordinate measuring machine carriage
A machine, such as a coordinate measuring machine, having an element and a structure movable with respect to each other along rails, wherein the rails have a different coefficient of thermal expansion than the structure to which they are attached. In one embodiment,...
06/13/2006
7060969Rotating machine having rotation sensors
Three rotation sensors circumferentially arranged at 90 degree intervals in a disk code wheel attached to a motor's output shaft respectively output a signal corresponding the rotational speed of the wheel. An error component of one period (one-periodic component) o...
06/13/2006
7047658Apparatus and method to measure the dimensional and form deviation of crankpins at the place of grinding
An apparatus and a relevant method for checking a crankpin (18) of a crankshaft (34) positioned on a numerical control grinding machine where it is worked includes a gauging head (39) with a Vee-shaped reference device (20) and a feeler (...
05/23/2006
7036237Measuring instrument
At least one assembly of a movable member or a guide member (32) that guides the movement of the movable member out of a plurality of assemblies of a measuring instrument contains a sealed space (322). A filler is filled in the sealed space (322...
05/02/2006
7024789Position measuring device with a temperature correction device
A position measuring device that includes a first element having a material measure and a temperature measuring unit with a sensor, the temperature measuring unit is unable to be displaced relative to the material measure. A second element having a scanning head, an...
04/11/2006
7007397Length measuring apparatus
A main scale is firmly bonded to a metal tape having a desired coefficient of linear expansion by a powerful adhesive. At the same time, the metal tape is fixed to a frame by a two-sided adhesive tape so as to be capable of expansion and contraction. A length measur...
03/07/2006
6993853Device and method for attaching a scale element or a protective tape therefor
A device for the directional attachment of a scale element of a linear position measuring system to an installation face of a first body. The device includes a first body, a second body comprising a scanning head, which is movable in a measuring direction in relatio...
02/07/2006
6964113Scale-bar artifact and methods of use
A scale-bar artifact is and measurement method is provided, the artifact comprising a shaft, at least one mounting nest positioned on the shaft, a plurality of target nests positioned on the shaft, at least one temperature sensor in contact with the material of the ...
11/15/2005
6941669Method for determining effective coefficient of thermal expansion
A method for determining an “effective” thermal coefficient of a machine comprises the steps of installing one or more temperature sensors (110) at various locations on the machine, positioning a first machine member (60) at a “known” reference...
09/13/2005
6941240Position measuring device
A position measuring system that includes a scale graduation, a scanning unit for scanning the scale graduation. An adjustment device that includes a displacement element for setting a position of the scanning unit with respect to the scale graduation and a gear-dow...
09/06/2005
6931749Apparatus and methods for measuring the pin diameter of a crankshaft at the place of grinding
An apparatus for checking diametral dimensions of crankpins and main journals in the course of grinding is provided. The apparatus includes a head with a Vee-shaped reference device and an axially movable feeler that contacts the surface of the pin to be checked, an...
08/23/2005
6931741Scale device
In a scale device including a scale unit (4) and detector (5), the scale unit (4) includes a scale member (6) formed from a long material and having at least a pair of fixing holes (12) formed therein across a position signal carry...
08/23/2005
6904695Position measuring system and method for the assembly thereof
The invention relates to a position measuring system for scanning a movement between a first element and a second element which is arranged in a moveable manner in relation to the first element. Said system comprises a material measure which can be fixed to the firs...
06/14/2005
6904696Method and device for attaching a scale element
A method for the directional attachment of a scale element of a position measuring system to an installation face of a first body. The method includes aligning a scale element on an installation face of a first body parallel to a measuring direction via an adjustmen...
06/14/2005
6901682Rotation angle detecting apparatus and its rotary disc
A rotary disc made of synthetic resin has a fixed portion fixed to a rotary shaft, a cylindrical portion extending in the thrust direction from the outer peripheral edge of the fixed portion, and a disc main body portion extending in the radial direction from the lo...
06/07/2005
6865820Device and method for attaching a scale element or a protective tape therefor
A device for the directional attachment of a scale element of a linear position measuring system to an installation face of a first body. The device includes a first body, a second body comprising a scanning head, which is movable in a measuring direction in relatio...
03/15/2005
6866451Device for detecting a thermal linear dilation on part of a machine
A device for detecting thermally caused linear expansions of a machine element, wherein the device includes a temperature sensor placed along an expansion direction. The temperature sensor includes a first metallic conductor having an electrical resistance that is p...
03/15/2005
6844720Method and apparatus for calibrating a linear variable differential transformer
A calibration apparatus for calibrating a linear variable differential transformer (LVDT) having an armature positioned in au LVDT armature orifice, and the armature able to move along an axis of movement. The calibration apparatus includes a heating mechanism with ...
01/18/2005
6829838Temperature compensation system for a coordinate measuring machine
A machine, such as a coordinate measuring machine, having an element and a structure movable with respect to each other along rails, wherein the rails have a different coefficient of thermal expansion than the structure to which they are attached. In one embodiment,...
12/14/2004
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