• Title/Summary/Keyword: Process compensation

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Development and Evaluation of Automatic Tool Compensation System (공구감시 시스템의 보정장치 개발과 평가에 관한 연구)

  • 정상화;신현성;차경래
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.11 no.5
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    • pp.93-99
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    • 2002
  • In general, manufacturing error is originated from bad material, machine tool defection and tool breakage. When the manufacturing process is stable, the most of error come from the tool wear. In common on-machine measurement teaching probe and touch sensor are widely used however in this paper the electric touch point type automatic tool compensation system is developed the performance of it is validated and effective operating is proposed.

Protection System Characteristics Analysis by Compensation Equipment in Power Systems (보상제어 설비의 운용에 따른 보호설비 특성분석)

  • Park, Ji-Hoon;Sul, Tong-Tae
    • Proceedings of the KIEE Conference
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    • 1998.07c
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    • pp.1006-1008
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    • 1998
  • This paper describes the possible undesier-able side effects that thyristor controlled compensation may have upon in several relays. This process consisted of calculating line conditions for each of the fault, compensation and loading levels. In some cases their effectiveness at coordinating compensated lines is lost, as they no longer can always accurately determine "distances" to faults.

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A Study on Compensation for tool deformation machining errors in micro end-milling (마이크로 엔드밀링에서 공구변형 가공오차 보상에 관한 연구)

  • Jong-In Son;Byeong-Uk Song
    • Design & Manufacturing
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    • v.17 no.4
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    • pp.24-32
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    • 2023
  • In this study, we introduce research aimed at minimizing machining errors without compromising productivity by compensating for the machining errors caused by tool deformation. Our approach experimentally establishes the direct correlation between cutting depth and machining error, and creates predictive models using mathematical functions. This method allows for the prediction of compensated cutting depths to obtain the desired cutting profiles, thereby maximizing the compensation of machining errors in the cutting process.

The Compensation Gap between Top Management Team(TMT) and Employee, and Firm Performance : Moderating Role of Promotion Probability and Opportunity, and Satisfaction with TMT (경영진과 종업원 간 보상격차가 기업성과에 미치는 영향 : 승진가능성 및 기회, 경영진에 대한 만족도의 조절효과)

  • Choi, Suk Bong
    • Journal of Korean Society for Quality Management
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    • v.49 no.3
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    • pp.313-326
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    • 2021
  • Purpose: Prior studies have sought to find antecedent to improve firm performance. However, research on compensation systems and employees' psychological mechanisms have been relatively limited. In this sense, this study has investigated the impact of compensation gap between TMT and employees on firm performance, and explored the factors that affect the above relationship. Specifically, this study analyzed the direct impact of compensation gap on firm performance. In addition, the process of compensation gap to firm performance is assumed to be significantly influenced by employees' recognized promotion system and satisfaction with TMT. Therefore, we examined moderating effects of both promotion probability and opportunity, and satisfaction with TMT on the relationship between compensation gap and firm performance. Methods: For empirical test, financial variables were collected from TS-2000 database, and moderating variables were collected form Job Planet for listed firms in Korea. We conducted hierarchical regression analysis to test hypotheses. Results: The findings of empirical analysis are as follows. First, compensation gap between TMT and employees had a positive effect on firm performance. Second, when promotion probability and opportunity was high, the effect of compensation gap on firm performance was strengthened. Third, when satisfaction with TMT was high, the positive effect of compensation gap on firm performance was also strengthened. Conclusion: Our findings have expanded prior research on human resource management and labor relation by identifying the positive role of compensation gap between TMT and employees on firm outcome. Moreover, our results also indicated that promotion probability and opportunity, and satisfaction with TMT, which has not been addressed well in previous studies, were important conditions enhancing the positive relationship between compensation gap and firm performance. Finally, this study suggest several theoretical and managerial implication with future research direction.

A Study on the Error Compensation of Three-DOF Translational Parallel Manipulator (3자유도 병렬기구의 위치오차 보정기술에 관한 연구)

  • 신욱진;조남규
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.13 no.3
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    • pp.44-52
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    • 2004
  • This paper proposed a error compensation methodology for three-DOF translational parallel manipulator. The proposed method uses CMM (coordinate measuring machine) as metrology equipment to measure the position of end-effector. To identify the transform relationships between the coordinate system of the parallel manipulator and the CMM coordinate system, a new coordinate referencing (or coordinate system identification) technique is presented. By using this technique, accurate coordinate transformation relationships are efficiently established. According to these coordinate transformation relationships, an equation to calculate the compensating error components at any arbitrary position of the end-effector is derived. In this paper, Monte Carlo simulation method is applied to simulate the compensation process. Through the simulation results, the proposed error compensation method proves its effectiveness and feasibility.

Models of Social Relief Schemes for Medical Malpractice (의료사고피해 구제제도의 제 모형)

  • 문옥륜;이기효
    • Health Policy and Management
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    • v.2 no.1
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    • pp.80-114
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    • 1992
  • Current compensation schemes for medical malpractice based on negligence is absolutely malfunctioning in Korea. Focussing on the reform of present tort systems for resolving medical malpractice disputes, this paper discusses the alternative models of the Social Relief Schemes for Medical Malpractice (SRSMM). Alternative models of SRSMM should fundamentally be based on either negligence or nofalult compensation principle. On the foundation of the previous relief principle, the SRSMM should be equupped with three major components-the preventio/reduction of the sharp increasing medical malpractice, the effective and efficient resolving process for malpractice disputes and the proper social financing scheme for compensation. The paper deals with pros and cons of the possible alternative models for reform centering on the three major components of the scheme. As conclusions, administrative arbitration machinaries and a compulsory fund for compensating the injured under the negligence principle are proposed to resolve the current problems Korea has faced.

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Design of a Step-Down DC-DC converter with On-chip Capacitor multiplyed Compensation circuit (온칩된 커패시터 채배기법 적용 보상회로를 갖는 DC to DC 벅 변환기 설계)

  • Park, Seung-Chan;Lim, Dong-Kyun;Yoon, Kwang-Sub
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.537-538
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    • 2008
  • A step-down DC-DC converter with On-chip Compensation for battery-operated portable electronic devices which are designed in 0.18um CMOS standard process. In an effort to improve low load efficiency, this paper proposes the PFM (Pulse Frequency modulation) voltage mode 1MHz switching frequency step-down DC-DC converter with on-chip compensation. Capacitor multiplier method can minimize error amplifier compensation block size by 20%. It allows the compensation block of DC-DC converter be easily integrated on a chip and occupy less layout area. But capacitor multiplier operation reduces DC-DC converter efficiency. As a result, this converter shows maximum efficiency over 87% for the output voltage of 1.8V (input voltage : 3.3V), maximum load current 500mA, and 0.14% output ripple voltage. The total core chip area is $mm^2$.

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Tool Shape Compensation Scheme for Formed Turning Tools Shape of Ball Bearing Raceways (베어링 궤도 선삭가공용 총형공구의 형상 보정기법)

  • Moon, Ho-Keun;Joung, Jae-Hyun;Moon, Suck-Chan;Joun, Man-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.3
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    • pp.50-55
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    • 2008
  • In this paper, we propose a new shape compensation scheme to make up for the difference in groove radius between the formed tools and the machined bearing raceways, which inherently takes place during machining the ball bearing raceways by the turning process using conventional formed tools. The associated conventional methods of the formed tool design and its modification such as a simple depth compensation method and a graphical compensation method are introduced and the latter, which has been known to be the better of the two, is experimentally investigated in detail to reveal its drawback. The algorithm is given and it is applied to develop a formed tool design program. The program developed by the presented approach is successfully applied to design the formed turning tool for the bearing raceways.

A Study on the Error Compensation of Machine Tool Position Using Reference Artifact and On-machine probe (기준물을 이용한 공작기계 위치오차 보정기술에 관한 연구)

  • 조남규;박재준;정성종
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2000.10a
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    • pp.20-25
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    • 2000
  • In this paper, a methodology of geometrical error identification and compensation for NC machine tool position. We have proposed a reference artifact with which, in measuring the coordinate system of NC machine, the robust coordinate systems are given. The coordinate system of the NC machine could be compensated successfully with the information obtained by measuring the reference artifact and our compensation algorithm. Monte Carlo simulation is used to evaluate coordinate referencing ability and, the uncertainties of the machine tool position is estimated and observed through the compensation process by simulation.

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A Study on Temperature Compensation of Silicon Piezoresistive Pressure Sensor (실리콘 저항형 압력센서의 온도 보상에 관한 연구)

  • 최시영;박상준;김우정;정광화;김국진
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.27 no.4
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    • pp.563-570
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    • 1990
  • A silicon pressure sensor made of a full bridge of diffused resistors was designed and fabricated using semiconductor integrated circuit process. Thin diaphragms with 30\ulcorner thickness were obtained using anisotropic wet chemical etching technique. Our device showed strong temperature dependence. Compensation networks are used to compensate for the temperature dependence of the pressure sensor. The bridge supply voltage having positive temperature coefficient by compensation networks was utilized against the negative temperature coefficient of bridge output voltage. The sensitivity fluctuation of pressure sensor before temperature compensation was -1700 ppm/\ulcorner, while it reduced to -710ppm\ulcorner with temperature compensation. Our result shows that the we could develop accurate and reliable pressure sensor over a wide temperature range(-20\ulcorner~50\ulcorner).

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