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Article
Publication date: 1 December 1994

Klaus Schroer

Describes a robot calibration package which produces a set of identifiedrobot model parameters. Uses a measurement target mounted on therobot’s end effector and a pair of…

218

Abstract

Describes a robot calibration package which produces a set of identified robot model parameters. Uses a measurement target mounted on the robot’s end effector and a pair of theodolites under automatic control. Typically permits the global positioning error of a robot to be reduced from 10 mm to 1mm. Concludes that calibration procedures such as these are essential for successful off‐line programming of robot systems.

Details

Industrial Robot: An International Journal, vol. 21 no. 6
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 December 1994

Thomas R Kugler

Describes an automated laser cutting cell used in the automotiveindustry. The cell has the benefits of fast throughput because of highcutting speeds, adaptability of height…

146

Abstract

Describes an automated laser cutting cell used in the automotive industry. The cell has the benefits of fast throughput because of high cutting speeds, adaptability of height sensing, safety of crash protection and flexibility of part modifications via robot path and program modifications. Outlines the feature of the cell which consists of two Nd:YAG lasers with fibre‐optic delivery and two five‐axis robots with trepanning heads, and describes their performance characteristics. Concludes with a summary of the advantages of using a laser cutting cell.

Details

Industrial Robot: An International Journal, vol. 21 no. 6
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 December 1994

G D van Albada, J M Lagerberg and A Visser

Outlines research work to design a robot calibration system which isportable, accurate and low‐cost. Describes prototype measuring systemwhich is based on a camera in the robot…

404

Abstract

Outlines research work to design a robot calibration system which is portable, accurate and low‐cost. Describes prototype measuring system which is based on a camera in the robot hand, plus a known reference object in the robot workspace. Gives details of the measuring procedure, the camera lens, the reference plate and the possible sources of measurement errors. Concludes that this method, based on photogrammetry to obtain measurements for the calibration of robot systems, has been implemented and tested and provides promising results for practical application.

Details

Industrial Robot: An International Journal, vol. 21 no. 6
Type: Research Article
ISSN: 0143-991X

Keywords

Open Access
Book part
Publication date: 4 October 2023

Thomas Schlingmann

The process of knowledge production is usually assigned to scientists who use specific methods to extract knowledge from someone else's experience. Usually this includes…

Abstract

The process of knowledge production is usually assigned to scientists who use specific methods to extract knowledge from someone else's experience. Usually this includes collecting, aggregating and interpreting data from an uninvolved point of view; that is, from the outside. This procedure is supposed to guarantee objectivity and generalisation. Many child sexual abuse (CSA) survivors reject such an approach that turns them into objects again. This presents a problem for research because it limits the number and contribution of potential participants and can lead to bias. In self-help groups of CSA survivors, an enormous amount of experiential knowledge accumulates, and sometimes this is transferred into more than only individually valid knowledge. Based on this experience and aiming for more agency of CSA Survivors, a group of adult survivors and researchers developed a new approach to research. It focuses on the development of self-organised research, which enables survivors of sexualised violence to practice research without losing agency. They are indispensable and elementary parts in all phases of the process. This chapter shows one way of formalising this process so quality criteria can be developed and applied. Following the presented approach, evaluation of the presented methods is the appropriate next step because self-help groups give reason to estimate significant outcomes. These outcomes not only enable self-help groups of CSA survivors to incorporate new methods but also include the chance to empower adults, children or youth who have been victims of sexualised violence.

Details

Participatory Research on Child Maltreatment with Children and Adult Survivors
Type: Book
ISBN: 978-1-80455-529-3

Keywords

Article
Publication date: 18 May 2021

Wenchi Shou, Jun Wang and Peng Wu

Simulation has attracted increasing attention in lean production research as a response to address the complexities of the production environment and difficulties of dealing with…

Abstract

Purpose

Simulation has attracted increasing attention in lean production research as a response to address the complexities of the production environment and difficulties of dealing with changes within a system. Considerable growth of using simulation to facilitate lean acceptance and implementation has been observed across different projects and sectors. However, a thorough review of the development and use of simulation in lean production research is limited.

Design/methodology/approach

This study aims to address this gap by reviewing 311 journal papers published in the past two decades on this specific research area and identify the state-of-the-art development and propose future research directions.

Findings

The review shows that current studies related to simulation in lean production research can be categorised into two major research streams, namely, simulation assisted lean facilitation and evaluation, and simulation-based lean education and training. Under the first research stream, a total of 19 application areas have been identified which applied both lean and simulation in their studies. The evolution of the simulation techniques used in these studies has been analysed as well. Meanwhile, four types of simulation games have been identified in the stream of simulation-based lean education and training and the impact and applicability of the different simulation and games have been discussed. A framework for engaging lean and simulation is suggested based on the review of the existing studies. The analysis in both streams also highlights the importance of stakeholder engagement and the utilisation of information technologies for future studies.

Practical implications

The findings of this study are expected to provide useful references for the future development and application of simulation in lean production research.

Originality/value

This paper conducted a broad and extensive review of simulation integrated lean production research. An in-depth examination of the retrieved papers was conducted through a structured and quantitative analysis to understand the current body of knowledge.

Details

Engineering, Construction and Architectural Management, vol. 28 no. 8
Type: Research Article
ISSN: 0969-9988

Keywords

Article
Publication date: 17 September 2019

Rafael Quelho de Macedo, Rafael Thiago Luiz Ferreira and Kuzhichalil Jayachandran

This paper aims to present experimental and numerical analyses of fused filament fabrication (FFF) printed parts and show how mechanical characteristics of printed ABS-MG94…

Abstract

Purpose

This paper aims to present experimental and numerical analyses of fused filament fabrication (FFF) printed parts and show how mechanical characteristics of printed ABS-MG94 (acrylonitrile butadiene styrene) are influenced by the void volume fraction, cooling rate and residual thermal stresses.

Design/methodology/approach

Printed specimens were experimentally tested to evaluate the mechanical properties for different printing speeds, and micrographs were taken. A thermo-mechanical finite element model, able to simulate the FFF process, was developed to calculate the temperature fields in time, cooling rate and residual thermal stresses. Finally, the experimental mechanical properties and the microstructure distribution could be explained by the temperature fields in time, cooling rate and residual thermal stresses.

Findings

Micrographs revealed the increase of void volume fraction with the printing speed. The variations on voids were associated to the temperature fields in time: when the temperatures remained high for longer periods, less voids were generated. The Young's Modulus of the deposited filament varied according to the cooling rate: it decreased when the cooling rate increased. The influence of the residual thermal stresses and void volume fraction on the printed parts failure was also investigated: in the worst scenarios evaluated, the void volume fraction reduced the strength in 9 per cent, while the residual thermal stresses reduced it in 3.8 per cent.

Originality/value

This work explains how the temperature fields can affect the void volume fraction, Young's Modulus and failure of printed parts. Experimental and numerical results are shown. The presented research can be used to choose printing parameters to achieve desired mechanical properties of FFF printed parts.

Details

Rapid Prototyping Journal, vol. 25 no. 10
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 16 August 2013

Wiljeana J. Glover, Wen‐Hsing Liu, Jennifer A. Farris and Eileen M. Van Aken

Despite the increased adoption and reported benefits of kaizen event (KE) programs, there is a lack of empirical research documenting their design, implementation and outcomes, as…

3607

Abstract

Purpose

Despite the increased adoption and reported benefits of kaizen event (KE) programs, there is a lack of empirical research documenting their design, implementation and outcomes, as well as what designs may be more vs less effective. This paper aims to present an empirical study describing the characteristics, including outcomes achieved, program attributes, and implementation problems, of 16 established KE programs. Although this study is primarily exploratory and descriptive, the goal is to identify areas for future research, including attributes that appear to support or detract from program success, and the outcomes and implementation problems experienced.

Design/methodology/approach

Using semi‐structured interviews, qualitative data were collected to characterize established KE programs in 16 manufacturing, service, and government organizations. The data were examined using content analysis to identify the most frequent codes for each characteristic, which were then compared to KE program characteristics synthesized from a systematic review of published KE sources. Based on this, a set of propositions were identified to guide future research on KE programs.

Findings

The majority of the 16 organizations reported successful programs, although there was noted variation in organization success. The organizations also neglected to measure many aspects of program success which they considered to be highly important, in particular, human resource outcomes. In addition, the organizations appeared to struggle with sustainability and believe that sustainability problems could threaten long‐term KE program viability. Other potentially influential factors include the types of processes targeted, event types, catalysts for events, and KE resources. The findings were used to develop propositions for future research in these and other specific areas.

Practical implications

The study provides a better understanding of the characteristics of established KE programs, as well as common areas in need of improvement even in these programs, and can be used by practitioners in establishing or improving their KE programs.

Originality/value

By documenting established KE programs across organizations and comparing actual practices to published sources, this study contributes to the development of KE theory and also provides direction for future empirical research.

Details

International Journal of Operations & Production Management, vol. 33 no. 9
Type: Research Article
ISSN: 0144-3577

Keywords

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