• Title/Summary/Keyword: chip control

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Test sequence control chip design of logic test using FPGA (FPGA를 이용한 logic tester의 test sequence control chip 설계 및 검증)

  • Kang, Chang-Hun;Choi, In-Kyu;Choi, Chang;Han, Hye-Jin;Park, Jong-Sik
    • Proceedings of the KIEE Conference
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    • 2001.11c
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    • pp.376-379
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    • 2001
  • In this paper, I design the control chip that controls inner test sequence of Logic Tester to test chip. Logic tester has the thirteen inner instructions to control test sequence in test. And these instructions are saved in memory with test pattern data. Control chip generates address and control signal such as read, write signal of memory. Before testing, necessary data such as start address, end address, etc. are written to inner register of control chip. When test started, control chip receives the instruction in start address and executes, and generates address and control signals to access tester' inner memory. So whole test sequence is controlled by making the address and control signal in tester's inner memory. Control chip designs instruction's execution blocks, respectively. So if inner instruction is added from now on, a revision is easy. The control chip will be made using FPGA of Xilinx Co. in future.

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Control if Chip From by Adjusting Feed-rate (이송량 조정에 의한 칩의 형태 제어)

  • 전재억;심재형;백인환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.993-997
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    • 1997
  • The continuous chip depresses the accuracy of workpieces and promotes the wear of machine tools and hunts operators. So chip control os a major problem in turning process. In this paper, a method of chip identification is develope by pyrometer. The identifier is applied in real-time control of chip pattern with adjusting feedrate.

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A Study on the Chip Control in Machining STS304 Using a Chip Breaker (STS304잘삭시 Chip Breaker를 이용한 Chip제어에 관한 연구)

  • Yeom, D.W.;Yu, K.H.;Seo, N.S.
    • Journal of the Korean Society for Precision Engineering
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    • v.11 no.6
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    • pp.42-49
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    • 1994
  • One of the parameters that influence the productivity of every industry, involved in metal cutting, is the chip from ; continuous or broken chip. Chip form varies according to machining conditions, material used, tool geometry and chip breaker geometry. Therefore, in this study we carried out the experiment on the chip control in machining STS304 using an attached obstruction type chip breaker. Namely, with the change of a chip breaker distance, chip breaker angle, cutting characteristics in machining STS304 which is well-known as a machining difficult material and produces a saw-toothed chip. The results of the experiment are as follows : 1. The chip breaker distance and angle under which the preferred chip is produced, show 1.5mm and 60 .deg. , while chip breaker angle in machining an ordinary steel was well-known 45 .deg. . 2. During the cutting process, the change of feed than the change of velocity was applied as cutting conditions, effects more clearly on the chip breaking. 3. Considering a whole surface roughness, it is not advisable to apply chip breaker mentioned above for precision cutting.

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Chip Breaking Prediction in Turning Process Considering Cutting Conditions and Chip Breaker Parameters (절삭조건과 칩브레이커 형상변수를 고려한 선삭 가공시의 칩절단 예측)

  • Choi, Jin-Pil;Lee, Sang-Jo
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.9
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    • pp.191-199
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    • 1999
  • In the continuous cutting process such as turning operation, chip control is thought very important to achieve the unmanned manufacturing system. The prediction of chip breakage under the given conditions is a substantial element for chip control. In this paper, a systematic approach to know the chip breaking region is represented under the concept of equivalent parameters. to Verify the suggested model, cutting experiments are executed with a commercial type and two other type chip breakers which have modified chip breaker parameters such as land width, groove width and nose radius. predicted chip breaking regions using the 3D cutting model agrees with those obtained from the experiments.

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Hybrid control of rotary type inverted pendulum by using one-chip microcomputer (One-chip 마이크로 컴퓨터에 의한 회전형 도립 진자의 hybrid 제어)

  • 김환성;김상봉
    • 제어로봇시스템학회:학술대회논문집
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    • 1992.10a
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    • pp.999-1003
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    • 1992
  • In the paper, a hybrid control approach for the swing-up control of a rotary type inverted pendulum is treated using one-chip microcomputer. The control approach is composed by a scheduling logic control for swing up control and the linear state feedback control to achieve the disired inverted-state of the pendulum. The experimental cystem has been implemented by a 16-bit one-chip microcomputer with 3096 opu as the digital controller incorporating the above mentioned control approach.

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Design and Contact Force Control of a Flip Chip Mounting Head system

  • Kim, Kyoung-Jun;Shim, Jae-Hong
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1060-1065
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    • 2003
  • This paper contributes to development of a new chip mounting head system for flip chip. Recently, the LDM(Linear DC Motor) has been widely used, because it has particular merits than the rotary type motors. In this paper, we proposed a macro/micro positioning system for force control of a chip mounting system. In the proposed macro/micro system, the macro actuator provide the system with a gross motion while the micro device yields fine tuned motion to reduce the harmful impact force that occurs between very small sized electronic parts and PCB surface. In order to prove the effectiveness of the proposed macro/micro chip mounting system, we compared the proposed chip mounting head with the conventional chip mounting head equipped with a macro actuator only. A series of experiments were executed under the mounting conditions of various access velocities and PCB stiffness. As a result of this study, a satisfactory voice coil actuator as the micro actuator has been developed, and its performance meet well the specifications desired for the design of the chip mounting head system and show good correspondence between theoretical analysis and experimental results.

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Single-Chip Microprocessor Control for Switched Reluctance Motor Drive

  • Hao Chen;Ahn, Jin-Woo
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.2B no.4
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    • pp.207-213
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    • 2002
  • The paper introduces a switched reluctance motor drive system based on an 80C31 and an Intel 80C 196KB single-chip microprocessor control. Advance schemes are used in turn-on and turn-off angles with the power converter's main switches during traction and regenerative braking. The principles of traction speed control and braking torque control are given. The hardware and software patterns in the 80c31 and the Intel 80C196KB single-chip microprocessor control system are also presented.

Identification of the Chip Form Using Neural Network (신경망을 이용한 칩 형태의 인식)

  • 심재형;권혁준;백인환
    • Journal of the Korean Society for Precision Engineering
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    • v.15 no.12
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    • pp.106-112
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    • 1998
  • A major problem in automation of turning operations is the difficulty in obtaining a sufficient and reliable chip control. The chip should be detected in order to provide a optimum chip control for unmanned turning operation. Using the difference of energy radiated from the chip, chip Patterns are estimated using pyrometer. From the initial output from the pyrometer, chips are identified according to the backpropagation algorithm developed in the research. The learning system developed in this work can be applied in real-time control of turning process with minor modification in drive system.

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Application of Taguchi Method for the Selection of Chip Breaker (칩브레이크 선정을 위한 Taguchi 방법의 적용)

  • 전준용
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.7 no.3
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    • pp.118-125
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    • 1998
  • Chip control is a major problem in automatic machining process, especially in finish turning operation. In this case, chip breaker is one of the important factors to be determined. As unbroken chips are grown. these deteriorate the surface roughness. and proces automation can not be carried out. In this study to get rid of chip curling problem while turning internal hole. optimal chip breaker is selected from the experiment. The experiment is planned with Taguchi's method that is based on the orthogonal arrary of design factors. From the response table. cutting speed, feedrate, depth of cut and tool geometry turn to be major factors affecting chip formation. Then, optimal chip breaker is selected. and this is verified as good enough for chip control from the experiment.

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Selection of chip breaker based on the experiment (실험적 방법에 기초한 칩브레이크 선정)

  • 전준용;허만성;김희술
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.271-275
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    • 1995
  • Chip control is a major problem in automatic machining process, especially in finish operation. Chip breaker is one of the important factors to be determined for the scheme of chip control. As unbroken chips are grown, there deteriorate quality of the surface roughness and process automation can be carried out. In this study, to get rid of chip curling problem while turning internal hole, optimal chip breaker is selected form the experiment. The experiment is planned with Taguchi's method that is based on the orthogonal arrary of design factor. From the respose table, cutting speed, feedrate, depth of cut, and tool geometry are major factors affecting chip formation. Then, optmal chip breaker is selected and this is verified good enough for chip control from the experiment.

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