Tyler Estler - Academia.edu (original) (raw)
Papers by Tyler Estler
We present the results of field validation measurements designed to test the positioning accuracy... more We present the results of field validation measurements designed to test the positioning accuracy and kinematic performance of the Large Optics Diamond Turning Machine (LODTM), constructed at Lawrence Livermore National Laboratory. Field measurements were performed during January-February and November, 1984, and are sufficient to characterize the capabilities of LODTM when used as a measuring machine. No part cutting tests were done. Measured errors include those due to machine drift, position repeatability, laser length scales, slide straightness, tool bar angular motions, axis geometry, and spindle motion. The static and dynamic performance of the Fast Tool Servo was assessed by bench tests at NBS. We also identify those aspects of machine behavior which are potentially problematic in fabrication of large optics with figure errors within the design specifications of LODTM.
CIRP Annals - Manufacturing Technology, 2009
... In processing of time-dependent and time-discretised digital measurement signals, Kalman Filt... more ... In processing of time-dependent and time-discretised digital measurement signals, Kalman Filtering and its further developments are usually ... variance bound can cope with unknown correlations [76] and are, therefore, appropriate mathematical tools for uncertainty analysis and ...
CIRP Annals - Manufacturing Technology, 2004
... valleys than a bigger ball. Be-cause of this effect one gets for measured features different ... more ... valleys than a bigger ball. Be-cause of this effect one gets for measured features different parameter values (size, position, form devi-ation) dependent on the diameter of the tip ball (Figure 14). As the measurement result is ...
Applied Optics, 1985
High-accuracy displacement interferometry in air W. Tyler Estler The absolute accuracy of laser i... more High-accuracy displacement interferometry in air W. Tyler Estler The absolute accuracy of laser interferometers employed in displacement metrology is limited by two domi-nant factors: uncertainties in the source vacuum wavelength and the refractive index of the ambient air. ...
CIRP Annals - Manufacturing Technology, 1996
this paper we analyze two types of circle closure: a simple closure , just described, and a dual ... more this paper we analyze two types of circle closure: a simple closure , just described, and a dual closure wherein two artifacts, such as a pair of indexing tables or an indexing table and an optical polygon, are intercompared in such a way that each is calibrated in the process. The conceptual ideas here are well known and widely applied [2--9]; our major goal is to derive explicit expressions for the resulting measurement uncertainties in a manner consistent with guidelines published by the International Organization for Standardization (ISO) and NIST [10--11]. In the process, we show how closure constraints serve to reduce uncertainty in an interesting way as a result of a basic observation: the result of a measurement provides information not only about the measured quantity (i.e., the defined quantity subject to measurement, or the measurand ), but also about any other quantities with which the measurand shares a functional relationship.
Tedious measurements and calculations performed quickly and accurately. Optical/mechanical/electr... more Tedious measurements and calculations performed quickly and accurately. Optical/mechanical/electronic system acts as shape gauge by taking measurements of machine-tool motions or complicated contours of objects, then processing measurement data into maps or profiles indicative of shapes. Transducers of shape gauge mechanical/electronic or optomechanical/electronic components that move along path on surface and measure roundness, perpendicular deviation, or slope of surface. Because of ease and speed, many intersecting profiles measured on surface.
INTRODUCTION Ball bars are typically used to evaluate the volumetric performance of coordinate me... more INTRODUCTION Ball bars are typically used to evaluate the volumetric performance of coordinate measuring machines (CMM). With the ever increasing sizes of CMMs and with wide spread application of larger articulated arm CMMs, larger ball bars are needed. In addition, laser tracking systems also require long reference length artifacts (a.k.a. optical ball bars) for evaluating their performance in accordance with standards similar to ASME’s B89.4.19. As these ball bars grow in size and evolve, new capabilities and techniques are necessary to calibrate them. During the 2001 ASPE Annual conference a machine called the one dimensional measuring machine (1-DMM), specifically designed to calibrate ball bars up to one meter in length, was introduced [1]. While this design concept was fine for short ball bars (≤1m), it was impractical for longer ball bars. To overcome this difficulty an alternate design and self-initialization method have been created. The new 1-DMM discussed in this paper ha...
We describe a laser tracker calibration system developed for frameless coordinate metrology syste... more We describe a laser tracker calibration system developed for frameless coordinate metrology systems. The system employs a laser rail to provide an in-situ calibrated length standard that is used to test a tracker in several different configurations. The system is in service at the National Institute of Standards and Technology (NIST) and at the Naval Surface Warfare Center, Corona Division (NSWC, Corona Division). The system description, calibration procedure, and uncertainty budget are presented.
Precision Engineering-journal of The International Societies for Precision Engineering and Nanotechnology, 1996
We present the analysis of a simple mechanical model of a common type of kinematic seat touch tri... more We present the analysis of a simple mechanical model of a common type of kinematic seat touch trigger probe widely used on modern coordinate measuring machines (CMMs). The model provides a quantitative description of the pretravel variation or “probe-lobing” characteristics that limit the use of such probes for high-accuracy dimensional measurements. We include the effects of stylus bending and the
An algorithm based on number theoretic arguments is given that shows how to position the NIST Adv... more An algorithm based on number theoretic arguments is given that shows how to position the NIST Advanced Automated Master Angle Calibration System (AAMACS) to its least angular step. AAMACS consists of three stacked independently driven serrated tooth indexing tables arranged to rotate concentrically around a common vertical axis. The least angular step between nearest neighbor positions of the topmost table is 80^^= 277/(379,080,000) rad. The problem of how to select the indexed tooth position of each of the independent tables reduces to the solution of a Diophantine equation in three unknowns. This equation is solved by use of the classic Euclidean Algorithm.
Journal of Research of the National Institute of Standards and Technology
Journal of Research of the National Institute of Standards and Technology
Public reporting burden for the collection of information is estimated to average 1 hour per resp... more Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
The National Bureau of Standards (NBS) maintains the standard of length in accordance with the de... more The National Bureau of Standards (NBS) maintains the standard of length in accordance with the definition of the meter, adopted by the General Conference of Weights and Measures (1983). The standard is used within the NBS to form a consistent system of units which are used in NBS calibration services.
Journal of Research of the National Institute of Standards and Technology
We analyze two types of full-circle angle calibrations: a simple closure in which a single set of... more We analyze two types of full-circle angle calibrations: a simple closure in which a single set of unknown angular segments is sequentially compared with an unknown reference angle, and a dual closure in which two divided circles are simultaneously calibrated by intercomparison. In each case, the constraint of circle closure provides auxiliary information that (1) enables a complete calibration process without reference to separately calibrated reference artifacts, and (2) serves to reduce measurement uncertainty. We derive closed-form expressions for the combined standard uncertainties of angle calibrations, following guidelines published by the International Organization for Standardization (ISO) and NIST. The analysis includes methods for the quantitative evaluation of the standard uncertainty of small angle measurement using electronic autocollimators, including the effects of calibration uncertainty and air turbulence.
Physical Review A, 1975
Optical interferometric measurements which determine the equation of state of xenon in the neighb... more Optical interferometric measurements which determine the equation of state of xenon in the neighborhood of the critical point are described. Analysis of Fraunhofer interference patterns from a thin slab of fluid yields data pairs: optical phase psi+=rho-kappaTmu and isothermal compressibility kappaT, along isotherms in the temperature range -10-4<ε<10-4, where ε=(T-Tc)Tc. Experimental data are analyzed in terms of a new parametric
We present the results of field validation measurements designed to test the positioning accuracy... more We present the results of field validation measurements designed to test the positioning accuracy and kinematic performance of the Large Optics Diamond Turning Machine (LODTM), constructed at Lawrence Livermore National Laboratory. Field measurements were performed during January-February and November, 1984, and are sufficient to characterize the capabilities of LODTM when used as a measuring machine. No part cutting tests were done. Measured errors include those due to machine drift, position repeatability, laser length scales, slide straightness, tool bar angular motions, axis geometry, and spindle motion. The static and dynamic performance of the Fast Tool Servo was assessed by bench tests at NBS. We also identify those aspects of machine behavior which are potentially problematic in fabrication of large optics with figure errors within the design specifications of LODTM.
CIRP Annals - Manufacturing Technology, 2009
... In processing of time-dependent and time-discretised digital measurement signals, Kalman Filt... more ... In processing of time-dependent and time-discretised digital measurement signals, Kalman Filtering and its further developments are usually ... variance bound can cope with unknown correlations [76] and are, therefore, appropriate mathematical tools for uncertainty analysis and ...
CIRP Annals - Manufacturing Technology, 2004
... valleys than a bigger ball. Be-cause of this effect one gets for measured features different ... more ... valleys than a bigger ball. Be-cause of this effect one gets for measured features different parameter values (size, position, form devi-ation) dependent on the diameter of the tip ball (Figure 14). As the measurement result is ...
Applied Optics, 1985
High-accuracy displacement interferometry in air W. Tyler Estler The absolute accuracy of laser i... more High-accuracy displacement interferometry in air W. Tyler Estler The absolute accuracy of laser interferometers employed in displacement metrology is limited by two domi-nant factors: uncertainties in the source vacuum wavelength and the refractive index of the ambient air. ...
CIRP Annals - Manufacturing Technology, 1996
this paper we analyze two types of circle closure: a simple closure , just described, and a dual ... more this paper we analyze two types of circle closure: a simple closure , just described, and a dual closure wherein two artifacts, such as a pair of indexing tables or an indexing table and an optical polygon, are intercompared in such a way that each is calibrated in the process. The conceptual ideas here are well known and widely applied [2--9]; our major goal is to derive explicit expressions for the resulting measurement uncertainties in a manner consistent with guidelines published by the International Organization for Standardization (ISO) and NIST [10--11]. In the process, we show how closure constraints serve to reduce uncertainty in an interesting way as a result of a basic observation: the result of a measurement provides information not only about the measured quantity (i.e., the defined quantity subject to measurement, or the measurand ), but also about any other quantities with which the measurand shares a functional relationship.
Tedious measurements and calculations performed quickly and accurately. Optical/mechanical/electr... more Tedious measurements and calculations performed quickly and accurately. Optical/mechanical/electronic system acts as shape gauge by taking measurements of machine-tool motions or complicated contours of objects, then processing measurement data into maps or profiles indicative of shapes. Transducers of shape gauge mechanical/electronic or optomechanical/electronic components that move along path on surface and measure roundness, perpendicular deviation, or slope of surface. Because of ease and speed, many intersecting profiles measured on surface.
INTRODUCTION Ball bars are typically used to evaluate the volumetric performance of coordinate me... more INTRODUCTION Ball bars are typically used to evaluate the volumetric performance of coordinate measuring machines (CMM). With the ever increasing sizes of CMMs and with wide spread application of larger articulated arm CMMs, larger ball bars are needed. In addition, laser tracking systems also require long reference length artifacts (a.k.a. optical ball bars) for evaluating their performance in accordance with standards similar to ASME’s B89.4.19. As these ball bars grow in size and evolve, new capabilities and techniques are necessary to calibrate them. During the 2001 ASPE Annual conference a machine called the one dimensional measuring machine (1-DMM), specifically designed to calibrate ball bars up to one meter in length, was introduced [1]. While this design concept was fine for short ball bars (≤1m), it was impractical for longer ball bars. To overcome this difficulty an alternate design and self-initialization method have been created. The new 1-DMM discussed in this paper ha...
We describe a laser tracker calibration system developed for frameless coordinate metrology syste... more We describe a laser tracker calibration system developed for frameless coordinate metrology systems. The system employs a laser rail to provide an in-situ calibrated length standard that is used to test a tracker in several different configurations. The system is in service at the National Institute of Standards and Technology (NIST) and at the Naval Surface Warfare Center, Corona Division (NSWC, Corona Division). The system description, calibration procedure, and uncertainty budget are presented.
Precision Engineering-journal of The International Societies for Precision Engineering and Nanotechnology, 1996
We present the analysis of a simple mechanical model of a common type of kinematic seat touch tri... more We present the analysis of a simple mechanical model of a common type of kinematic seat touch trigger probe widely used on modern coordinate measuring machines (CMMs). The model provides a quantitative description of the pretravel variation or “probe-lobing” characteristics that limit the use of such probes for high-accuracy dimensional measurements. We include the effects of stylus bending and the
An algorithm based on number theoretic arguments is given that shows how to position the NIST Adv... more An algorithm based on number theoretic arguments is given that shows how to position the NIST Advanced Automated Master Angle Calibration System (AAMACS) to its least angular step. AAMACS consists of three stacked independently driven serrated tooth indexing tables arranged to rotate concentrically around a common vertical axis. The least angular step between nearest neighbor positions of the topmost table is 80^^= 277/(379,080,000) rad. The problem of how to select the indexed tooth position of each of the independent tables reduces to the solution of a Diophantine equation in three unknowns. This equation is solved by use of the classic Euclidean Algorithm.
Journal of Research of the National Institute of Standards and Technology
Journal of Research of the National Institute of Standards and Technology
Public reporting burden for the collection of information is estimated to average 1 hour per resp... more Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
The National Bureau of Standards (NBS) maintains the standard of length in accordance with the de... more The National Bureau of Standards (NBS) maintains the standard of length in accordance with the definition of the meter, adopted by the General Conference of Weights and Measures (1983). The standard is used within the NBS to form a consistent system of units which are used in NBS calibration services.
Journal of Research of the National Institute of Standards and Technology
We analyze two types of full-circle angle calibrations: a simple closure in which a single set of... more We analyze two types of full-circle angle calibrations: a simple closure in which a single set of unknown angular segments is sequentially compared with an unknown reference angle, and a dual closure in which two divided circles are simultaneously calibrated by intercomparison. In each case, the constraint of circle closure provides auxiliary information that (1) enables a complete calibration process without reference to separately calibrated reference artifacts, and (2) serves to reduce measurement uncertainty. We derive closed-form expressions for the combined standard uncertainties of angle calibrations, following guidelines published by the International Organization for Standardization (ISO) and NIST. The analysis includes methods for the quantitative evaluation of the standard uncertainty of small angle measurement using electronic autocollimators, including the effects of calibration uncertainty and air turbulence.
Physical Review A, 1975
Optical interferometric measurements which determine the equation of state of xenon in the neighb... more Optical interferometric measurements which determine the equation of state of xenon in the neighborhood of the critical point are described. Analysis of Fraunhofer interference patterns from a thin slab of fluid yields data pairs: optical phase psi+=rho-kappaTmu and isothermal compressibility kappaT, along isotherms in the temperature range -10-4<ε<10-4, where ε=(T-Tc)Tc. Experimental data are analyzed in terms of a new parametric