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Relevant bibliographies by topics / Volumetric compensation

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Academic literature on the topic 'Volumetric compensation'

Author: Grafiati

Published: 28 June 2021

Last updated: 12 February 2022

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Journal articles on the topic "Volumetric compensation"

1

Zhang, Hong Xin, and Qian Jian Guo. "Research on Volumetric Error Measurement, Modeling and Compensation for NC Machine Tools." Applied Mechanics and Materials 513-517 (February 2014): 4202–5. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.4202.

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With the increasing requirements of the machining accuracy of CNC machine tools, the impact of thermal deformation is growing. Thermal error compensation technology can predict and compensate the thermal errors in real-time, and improve the machining accuracy of the machine tool. In this paper, the research objects of thermal error compensation is expanded to the volumetric error of the machine tool, the volumetric error modeling of a three-axis machine tool is fulfilled and a compensator is developed for the compensation experiment, which provides scientific basis for the improvement of the machining accuracy.

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Guo, Qian Jian, Qing Wen Qu, and Jian Guo Yang. "Application of Ant Colony Algorithm to Volumetric Thermal Error Modeling and Compensation of a CNC Machine Tool." Applied Mechanics and Materials 170-173 (May 2012): 3487–90. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3487.

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Volumetric errors are the major contributor to the dimensional errors of a workpiece in precision machining. Error compensation technique is a cost-effective way to reduce volumetric errors. Accurate modeling of volumetric errors is a prerequisite of error compensation. In this paper, a volumetric error model was proposed by using neural networks based on ant colony algorithm. Finally, a volumetric error compensation system was developed based on the proposed model, and which has been applied to a CNC machine tool in daily production. The results show that the volumetric errors are reduced and the machining accuracy of the machine tool is improved.

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Wang, K., X. Sheng, and R. Kang. "Volumetric Error Modelling, Measurement, and Compensation for an Integrated Measurement-Processing Machine Tool." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 11 (2010): 2477–86. http://dx.doi.org/10.1243/09544062jmes2200.

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The volumetric error of a measurement-processing integrated machine tool was studied by using a complicated surface workpiece grinding machine as a special example. The model of volumetric error was established by using homogeneous transformation matrices, and the effect of volumetric error on coordinate transformation between the measurement and the processing work station was analysed. Various error components of the machine tool were measured with a laser interferometer and an electronic level, and the volumetric error was compensated by external software. With a ball bar system and grinding experiments, the volumetric position accuracy was tested after compensation. The experiment results illustrated that both the volumetric position accuracy and machining precision were improved dramatically after compensation.

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Galetto, Maurizio, Luca Mastrogiacomo, Giovanni Moroni, and Stefano Petrò. "Volumetric Error Compensation for the MScMS-II." Procedia CIRP 10 (2013): 98–104. http://dx.doi.org/10.1016/j.procir.2013.08.018.

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Holub, Michal, Petr Blecha, Frantisek Bradac, and Roman Kana. "VOLUMETRIC COMPENSATION OF THREEAXIS VERTICAL MACHINING CENTRE." MM Science Journal 2015, no. 03 (2015): 677–81. http://dx.doi.org/10.17973/mmsj.2015_10_201534.

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Cajal, C., J. Santolaria, J. Velazquez, S. Aguado, and J. Albajez. "Volumetric Error Compensation Technique for 3D Printers." Procedia Engineering 63 (2013): 642–49. http://dx.doi.org/10.1016/j.proeng.2013.08.276.

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Lu, Ying-Chen, and Syh-Shiuh Yeh. "Using the Segmented Iterative Learning Control Method to Generate Volumetric Error-Compensated Part Programs for Three-Axis CNC Milling Machine Tools." Journal of Manufacturing and Materials Processing 2, no. 3 (2018): 53. http://dx.doi.org/10.3390/jmmp2030053.

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This study proposes using the iterative learning control method to adjust the volumetric error-compensated tool path, where the working volume motion accuracy of three-axis computerized numerical control (CNC) milling machine tools is increased by segmented modification of the part program. As the three-axis CNC milling machine tools generally have volumetric error of working volume, this study refers to the measured and established table of volumetric errors and uses the method of the modifying part program for volumetric error compensation of machine tools. This study proposes using part-program single-block positioning segmented for volumetric error compensation, as the generated compensated part program with multiple compensated blocks can effectively compensate the volumetric error of working volume in the tool moving process. In terms of the compensated tool path computing method, this study uses the iterative learning control (ILC) method and refers to compensated tool path and volumetric errors along the compensated tool path for iterative computation. Finally, a part program with multiple blocks is modified by the converged optimal compensated tool path, in order that the modified part program has higher-precision volumetric error compensation effect. The simulation result shows that the rate of improvement of error of the volumetric error compensation method proposed in this study is 70%. The result of cutting tests shows that the average rate of improvement of the straightness error of the test workpiece is 60%, while the average rate of improvement of height error is 80%. Therefore, the results of simulation and cutting tests can prove the feasibility of using the ILC method for segmented modification of the volumetric error-compensated part programs proposed in this study.

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Zhang, Yi, Jianguo Yang, Sitong Xiang, and Huixiao Xiao. "Volumetric error modeling and compensation considering thermal effect on five-axis machine tools." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 5 (2012): 1102–15. http://dx.doi.org/10.1177/0954406212456475.

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This article intends to provide an error compensation system for five-axis machine tools. A volumetric error model is established with homogeneous transformation matrix method, from which compensation values of both orientation and position errors can be obtained. Thirty-seven errors on a five-axis machine tool are classified into three categories – functional, random, and negligible errors, among which the effect of the first one on volumetric accuracy is considered as great enough to be included in this model. Some typical modeling methods are discussed on positioning and straightness errors, considering both geometric and thermal effects. Then, we propose a compensation implementation technique based on the function of external machine zero point shift and Ethernet data communication protocol for machine tools. Finally, laser diagonal measurements have been conducted to validate the effectiveness of the proposed volumetric error compensation system.

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Wang, Shih Ming, Han Jen Yu, and Hung Wei Liao. "A Low Cost and Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools." Applied Mechanics and Materials 284-287 (January 2013): 1723–28. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1723.

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Error compensation is an effective and inexpensive way that can further enhance the machining accuracy of a multi-axis machine tool. The volumetric error measurement method is an essential of the error compensation method. The measurement of volumetric errors of a 5-axis machine tool is very difficult to be conducted due to its complexity. In this study, a volumetric-error measurement method using telescoping ball-bar was developed for the three major types of 5-axis machines. With the use of the three derived error models and the two-step measurement procedures, the method can quickly determine the volumetric errors of the three types of 5-axis machine tools. Comparing to the measurement methods currently used in industry, the proposed method provides the advantages of low cost, easy setup, and high efficiency.

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Majda, Paweł, and Joanna Jastrzębska. "Selection of numerical compensation model of geometric errors of machine tools." Mechanik 91, no. 11 (2018): 980–83. http://dx.doi.org/10.17814/mechanik.2018.11.175.

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After many years of intensive work, experts from ISO TC 39 have published the technical report ISO TR 16907 “Machine tools – numerical compensation of geometric errors”. This document defines the terminology, presents advantages and limitations of numerical compensation of machine tool and measuring machine. This gives machine manufacturers and users important information on the application of numerical compensation. In the context of the compensation types defined in ISO TR 16907, presented principles of selecting volumetric error models for three-axis machine tools. The principles of reducing these models due to the functional tasks of machine tools were also presented. The final result is a table of reduced models for three-axis machine tools. It determines the degree of the model and the experimental test program, which should be done to determine volumetric error.

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Dissertations / Theses on the topic "Volumetric compensation"

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Butterworth, Alec. "Calibration and compensation of volumetric errors in a 3 axis machining centre." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488195.

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Andrýsek, Jakub. "Nasazení pokročilých kompenzací na stroji MCV 754 QUICK." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319258.

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This work is focused on the software compensation of the geometric and volumetric errors. In the thesis there are descripted the measuring instruments suitable for measuring geometric and volumetric errors of the machine tool. In addition, there are described control systems and selected software compensations currently used in the machine tools. In the experimental part of the thesis there is briefly described the machining machine where the experiment was performed. Detailed procedures for using the used measuring instruments are also described. The aim of this thesis is to determine the influence of the size of the compensated volume on the geometric and volumetric precision of the machine tool.

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Mišún, Filip. "Návrh automatického cyklu pro posuzování způsobilosti měření obrobkovou sondou na obráběcím centru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443252.

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This diploma thesis describes the procedures of individual electronic compensations for CNC machines used to increase the accuracy of machines. This part is followed by the determining tolerance of the measuring and the influence of individual electronic compensations based on measured data using touch probe and calibrated standards according to VDA 5 norm.

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Vala, Michal. "Testování technologie on-the-fly přístrojem LaserTRACER." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319262.

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This diploma thesis describes realization and testing on-the-fly measurement using tracking interferometer. This measurement enables to achieve higher amount of measured points and decrease time of machine tool calibration. Calibration and verification values of machine parameters, as well as time of measurement and other details of this method are compared with results of conventional method called trigger. To evaluate the quality of volumetric compensation created from calibration values, we use verification measurement of circular interpolation.

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Velič, Samuel. "Měření obrobků na obráběcích strojích pomocí obrobkové sondy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417728.

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This diploma thesis deals with the influence of electronic compensation on accuracy of the measurement using the touch probe. The theoretical part concerns touch probes, specifically their classification, principles of working and applications. This part also includes devices used later in the experiment, particularly double ballbar, laser interferometer and LaserTRACER. The Practical part describes an experiment, demonstrating the correlation between the accuracy improvement of the touch probe and the electronic compensation’s level. All measurements were executed in accordance with the norm VDA 5 and were evaluated by the Matlab software. The graphs of reliance tolerance of capability of measurement on the length of the benchmark. At the end of this diploma thesis there are partial conclusions deduced. The deduction is based on generated graphs. The partial conclusions synoptically compare the influence of individual machine´s configurations on the accuracy of the touch probe.

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Marques, Alessandro. "Uma interface eletrônica e computacional para medições a três coordenadas." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-18122015-143939/.

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As Máquinas de Medir a Três Coordenadas (MM3Cs) desde sua criação evoluíram sensivelmente, entretanto poucas foram as modificações estruturais observadas. Hoje, para fabricantes de máquinas destacarem-se no mercado, são necessários grandes investimentos na busca de novos materiais estruturais e no desenvolvimento de programas computacionais cada vez mais versáteis. O sistema eletrônico e os programas computacionais utilizados durante as medições são inacessíveis e rígidos. Estes aplicativos normalmente não podem ser analisados nem modificados pelo usuário. São exemplos clássicos desta rigidez as características préestabelecidas pelo programa, ou métodos de ajustes utilizados na definição das grandezas. Este trabalho tem por objetivo exibir a interface eletrônica e computacional que quebra essa rigidez e permite a aquisição dos sinais das escalas da MM3C, possibilitando o desenvolvimento de novos aplicativos computacionais. O sistema foi aplicado em uma MM3C do tipo Ponte Móvel. Foi desenvolvido um programa computacional, MaqMed 2000, que utiliza os valores dos pontos coordenadas capturados no volume de trabalho da MM3C, e faz a compensação das coordenadas dos pontos utilizados, através das equações do Modelo Reduzido de Sintetização de Erros (MRSE). A avaliação da compatibilidade do dispositivo construído foi feita através do MaqMed 2000 em situações práticas. Foram tomados pontos no perfil de artefatos-padrão e os pontos ajustados através de duas rotinas, uma com e outra sem compensação dos erros. Os artefatos foram medidos em várias posições no volume da MM3C e averiguada a proximidade entre os resultados compensados e os não compensados, ao valor calibrado do artefato. O sistema desenvolvido permitiu compensar os erros em até 98% para compensação bidimensional e 87% para tridimensional.<br>Since the advent Coordinate Measuring Machines (CMMs) have improved substantially. However, only a small number of structural modifications were observed. Nowadays, considerable capital expenditure is needed to keep CMM builders competitive. Most important research fields concern structural material and production of more flexible and versatile software. The electronic system and the software used during measurement with CMM are rigid and inaccessible and no user modification is permitted. Typical examples are the predetermined software features and curve fitting methods used on the magnitudes definition process. This research aims to exhibit an interface that copes with the system stiffness and enables signal acquisition from the scales of the CMM, allowing the development of new types softwares. The proposed system was implemented on a moving bridge type CMM. A program that uses the values of the coordinate points obtained from the CMM work volume was created. The software MaqMed 2000 performs the compensation of the coordinates of the used points by means of synthesized errors equations. Evaluation of the performance of the built device was carried out using MaqMed 2000 in practical situations. Data sets were collected along the profile of artefacts and fitted by means of two routines, one with error compensation and the other not compensated. Artefacts were measured in several locations in the whole volume of the CMM. The proximity between the compensated and noncompensated results with respect to the calibrated artefact value was examined. The developed system allowed for error compensation of 98% for bi-dimensional compensation and 87% for tri-dimensional compensation.

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Hsu, Shih-Hsin, and 許世昕. "Research on the Volumetric Error Compensation of Micro Coordinate Measuring Machine." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/22202885773959099500.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>102<br>In the modern metrological technology, traditional coordinate measuring machines (CMM) is not able to satisfy the required precision and accuracy in micro/nano scale. Therefore, NTU Metrology Lab developed a Micro coordinate measuring machine (Micro-CMM) with high precision. This research presents the combination of industrial techniques, including an Abbe free XY Co-planar stage, Z-axis ram, scanning probe and high-resolution sensors. Based on these parts, the goal of this research is to improve Micro-CMM, which contains Laser wavelength error and volumetric error. For the wavelength part, this research designs a wavelength compensator by transmission grating and temperature sensor, and calibrates the real wavelength under temperature variation. Besides, this research builds a volumetric model, verified by experiments of Abbe error, perpendicular error, flatness error and mirror error. By this volumetric error model, the performance of Micro-CMM will be promoted well. This research also improves the method of the fabrication process of optical fiber tip ball. By this method, the fiber is heated to melting point and extruded before forming the tip ball. The result tip ball diameter is around 50μm, and it’s much better than commercial products. Finally, apply the Micro-CMM to measure different parts with various functions, such as small lens and commercial camera model.

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Bal, Evren. "Modeling and compensation of machine tool volumetric errors for virtual CNC environment." Thesis, 2003. http://hdl.handle.net/2429/15620.

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Machine tools produce positioning errors due to thermal and structural deformations of the structural elements, geometric errors due to inaccuracies in the manufacturing and assembly of their components, and computer numerical control errors caused by the bandwidth of their servo drives. This thesis presents the measurement, modeling and compensation of geometric errors of three axis machine tools in order to simulate and improve their volumetric accuracy in virtual environment. The geometric accuracy of each axis is measured using a laser interferometer. The displacement, pitch, yaw and backlash errors of each axis element are measured and mapped to the machine coordinates using rigid body kinematic transformations of the system. The identified errors are curve fitted to the position of each drive in the machine coordinates. The algorithm allows prediction of relative positioning error between the tool and workpiece within the working volume of the machine tool, or pre-compensates the errors by adding the estimated positioning errors to Numerical Control (NC) program in Virtual Environment before the machining takes place. The prediction and compensation of geometric errors are experimentally demonstrated on a three axis, vertical CNC machining center. Standard ISO geometric profiles, a circle and a diamond, slot milled on the machine. The machined profiles are measured using a coordinate measuring machine, and the lengths and offsets from the command profiles are estimated from the measurements. The measurement results and the predicted geometric errors are compared. The contributions of CNC and tool deflections to the total errors are estimated, and the remaining errors are correlated to geometric errors of the machine tool. Although, it was not possible to account all the machine tool errors, the proposed prediction and correction method in virtual environment improved the compensation of geometric errors significantly. The overall model is integrated to UBC Manufacturing Automation Laboratory's Virtual CNC system for use in industry.

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Gerlitz, Frank. "In-process forecasting compensation control of machining center volumetric error including workpiece inspection." 1990. http://catalog.hathitrust.org/api/volumes/oclc/22472310.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1990.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (147-153).

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Yen, Han-Ming, and 顏翰銘. "Development of real-time volumetric error compensation system for 3-axis Machine Tools." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/63403303157078852095.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>104<br>The position feedback control of NC machine tool controllers mostly employs displacement sensor (such as optical scale or encoder) as a single sensor system. Distance between axis of sensor and axis of cutting could lead to massive enlargement of the positioning error of each axis which is known as the Abbe principle. The movement of linear stage inherently has position and orientation errors in six degree of freedom, which are three linear errors (positioning error, horizontal straightness and vertical straightness) and three rotational angles (pitch, yaw and roll). As a result, Abbe error is considered to be the major cause for volumetric error of machine tool. In this study, a multi-sensor feed-back compensation system which consists of three angular sensors and NC controller is developed to greatly enhance the machine tool accuracy by detecting angular errors in real-time and corresponding Abbe offsets so as to compensate for the Abbe errors dynamically. It can also be embedded in NC controllers to improve the accuracy of machine tool. In the measurement system, autocollimator and roll are deployed to monitor the angular errors of machine tool by constantly converting the measuring signals into Pc-based controller(with embedded volumetric error model) Experiments show that the positioning error of an investigated NC machine tool Fis mainly affected by Abbe error. With the proposed volumetric error compensation system, the positioning accuracy can be significantly improved by more than 80%.

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Books on the topic "Volumetric compensation"

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Butterworth, A. Calibration and compensation of volumetric errors in a 3 axis machining centre. UMIST, 1989.

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Book chapters on the topic "Volumetric compensation"

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Berlinger, Kajetan, Michael Roth, Jens Fisseler, Otto Sauer, Achim Schweikard, and Lucia Vences. "Volumetric Deformation Model for Motion Compensation in Radiotherapy." In Medical Image Computing and Computer-Assisted Intervention – MICCAI 2004. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30136-3_112.

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Marek, Jiri, Michal Holub, Tomas Marek, and Petr Blecha. "Geometric Accuracy, Volumetric Accuracy and Compensation of CNC Machine Tools." In Machine Tools [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.92085.

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"QGA-SVM study on temperature compensation of liquid ammonia volumetric flowmeter." In Computational Intelligence in Industrial Application. CRC Press, 2015. http://dx.doi.org/10.1201/b18590-18.

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Conference papers on the topic "Volumetric compensation"

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Vicentini, Federico, Paolo Magnoni, Matteo Giussani, and Lorenzo Molinari Tosatti. "Volumetric compensation of accuracy errors in a multi-robot surgical platform." In 2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2015. http://dx.doi.org/10.1109/embc.2015.7319494.

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Weinlich, Andreas, Michel Batz, Peter Amon, Andreas Hutter, and Andre Kaup. "Volumetric deformation compensation in CUDA for coding of dynamic cardiac images." In 2013 Picture Coding Symposium (PCS). IEEE, 2013. http://dx.doi.org/10.1109/pcs.2013.6737715.

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Wang, C. "Current issues on 3D volumetric positioning accuracy: measurement, compensation, and definition." In Seventh International Symposium on Instrumentation and Control Technology, edited by Jiancheng Fang and Zhongyu Wang. SPIE, 2008. http://dx.doi.org/10.1117/12.806755.

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Weng, Lingtao, Weiguo Gao, Dawei Zhang, Guangming Sun, Wenjie Tian, and Teng Liu. "Influences of linear and angular compensation on volumetric accuracy of precision machine tools." In 2018 IEEE International Conference on Advanced Manufacturing (ICAM). IEEE, 2018. http://dx.doi.org/10.1109/amcon.2018.8615030.

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Wang, Shih-Ming, Han-Jen Yu, and Hung-Wei Liao. "An Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-83000.

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Accurate measurement of volumetric errors plays an important role for error compensation for multi-axis machines. The error measurements for volumetric errors of five-axis machines are usually very complex and costly than that for three-axis machines. In this study, a direct and simple measurement method using telescoping ball-bar system for volumetric errors for different types of five-axis machines was developed. The method using two-step measurement methodology and incorporating with derived error models, can quickly determine the five degrees-of-freedom (DOF) volumetric errors of five-axis machine tools. Comparing to most of the current used measurement methods, the proposed method provides the advantages of low cost, high efficiency, easy setup, and high accuracy.

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Lu, Ying-Chen, and Syh-Shiuh Yeh. "Application of an Iterative Learning Control Algorithm to Volumetric Error Compensation for CNC Machines." In CAD'14. CAD Solutions LLC, 2014. http://dx.doi.org/10.14733/cadconfp.2014.60-62.

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Lu, Ying-Chen. "Application of an Iterative Learning Control Algorithm to Volumetric Error Compensation for CNC Machines." In CAD'14 Hong Kong. CAD Solutions LLC, 2014. http://dx.doi.org/10.14733/cadconfp.2014.61-63.

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Roche, Nicholas A., Martin Cleary, Teresa B. Peters, Evelyn N. Wang, and John G. Brisson. "Development of a Compensation Chamber for Use in a Multiple Condenser Loop Heat Pipe." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17581.

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We report the design and analysis of a novel compensation chamber for use in PHUMP, a multiple condenser loop heat pipe (LHP) capable of dissipating 1000 W. The LHP is designed for integration into a high performance air-cooled heat sink to address thermal management challenges in advanced electronic systems. The compensation chamber is integrated into the evaporator of the device and provides a region for volumetric expansion of the working fluid over a range of operating temperatures. Additionally, the compensation chamber serves to set the liquid side pressure of the device, preventing both flooding of the condensers and dry out of the evaporator. The compensation chamber design was achieved through a combination of computational simulation using COMSOL Multiphysics and models developed based on experimental work of previous designs. The compensation chamber was fabricated as part of the evaporator using Copper and Monel sintered wicks with various particle sizes to achieve the desired operating characteristics. Currently, the compensation chamber is being incorporated into a multiple condenser LHP for a high performance air-cooled heat sink.

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Ouafi, Abderrazak El, Michel Guillot, and Abdellah Bedrouni. "Improving the Accuracy of Multi-Axis Machines Through On-Line Error Compensation Using Neural Networks." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/dac-5641.

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Abstract This research is devoted to one of the most fundamental problems in precision engineering: multi-axis machines accuracy. The paper presents a new approach designed to support the implementation of software error compensation of geometric, thermal and dynamic errors for enhancing the accuracy of multi-axis machines. The accuracy of multi-axis machines can be significantly improved using an intelligent integration of sensor information to perform the compensation function. The compensation process consists of the following major steps carried out on-line: continuous monitoring of the machine conditions using position, force, speed and temperature sensors mounted on the machine structure. Error forecasting through sensor fusion. Volumetric error synthesis and software compensation. To improve the effectiveness of error modeling, an artificial neural network is extensively applied. Implemented on a turning center, the compensation approach has enabled improvement of the machine accuracy by reducing the maximum dimensional error from 70 μm initially to less than 4 μm.

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Xu, Kai, Tsz-Ho Kwok, and Yong Chen. "A Reverse Compensation Framework for Shape Deformation in Additive Manufacturing." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8815.

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Shape deformation is an important issue in additive manufacturing (AM) processes such as the projection-based Stereolithography. Volumetric shrinkage and thermal cooling during the photopolymerization process combined with other factors such as the layer-constrained building process lead to complex deformation that is difficult to predict and control. In this paper, a general reverse compensation method and related computation framework are presented to reduce the shape deformation of AM fabricated parts. During the reverse compensation process, the shape deformation is calculated based on physical measurements of shape deformation. A novel method for identifying the correspondence between the deformed shape and the given nominal computer-aided design (CAD) model is presented based on added markers. Accordingly, a new CAD model based on the shape deformation and related compensation is computed. The intelligently revised CAD model by going through the same building process can result in a fabricated part that is close to the nominal CAD model. Two test cases have been designed to demonstrate the effectiveness of the presented method and the related computation framework. The shape deformation in terms of L2- and L∞-norm based on measuring the geometric errors is reduced by 40–60%.

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