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Dissertations / Theses on the topic 'Micro-stepping'
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1
Hizal, Ates Emel. "Design And Realization Of A Step Motor Driver With Micro-stepping Capability." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613166/index.pdf.
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Step motors are motion control mechanisms that convert digital pulses into mechanical shaft rotation. They provide high precision positioning and repeatability of movement without a closed loop control, which is preferable for industrial applications in which accurate positioning control is needed. In this thesis, design and realization of a step motor driver will be performed using micro-stepping, which is based on controlling the current of each winding of the motor continuously and solves noise and resonance problems as well as providing an increase in accuracy and resolution.
2
Mietka, Helena Budzynska. "White Feminist Tears: Understanding Emotion, Embracing Discomfort, Exploring Dominant Femininities At Scripps College, and Stepping Towards a Critical White Anti-Racist Feminism." Scholarship @ Claremont, 2015. http://scholarship.claremont.edu/scripps_theses/656.
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In this thesis, I trace my personal journey and the precursors of unlearning and conversation necessary to start to move towards anti-racism. With a focused look on specific aspects of feminist history, Scripps College as a place was historically contextualized. This allowed for an exploration of its student body, a look at the ways in which traditional gender meanings and expectations necessarily operate within that space. White students who claim the label feminist add complexity to that space, though their reactions to conversations of race can be traced back to the historic and gender over-determined systems of domination and victimhood that produce caustic white feminist tears. Finally, different ways of having difficult conversations are discussed, along with detailed understandings of why those conversations are necessary. In conclusion, I try to envision a kind of feminism that I would like myself and my peers to continue to work for, and emphasize again the sort of education that one must undergo in order to continue their awareness and work.
3
林世祺. "Bone Drilling System Using a Micro-stepping Motor." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/45207819431652422380.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
89
The microstepping driving technology will help a stepping motor get a smaller stepping angle. Besides, microstepping driver helps reduce the oscillation and overshoot of a stepping motor, and then decreases the effect of its torque ripple. Meanwhile, the microstepping driving method adopts high frequency stepping impulse input and micro steps with smaller overshoot. It thereby results in less resonance. This thesis consists of two parts. The first part centers on DSP, materializing the microstepping control technology of five-phase stepping motor and comparing the differences between the ordinary full stepping and the microstepping driving methods by the S-curve of point to point motion track. The second part is about the application of a stepping motor in the bone drilling operation practice. By monitoring the variation in the feedback current, we can tell the resistance of the stepping motor and learn whether the drilling process is complete or not. The results of the experiment prove that the microstepping driving method will help control the accuracy of the bone drilling operation within a tolerance of less than 2 mm.
4
Zheng, Yun-ren, and 鄭裕仁. "Development of DSP-Based Micro-Stepping Motor Drives." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/539eg8.
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碩士國立臺灣科技大學
電機工程系
95
The thesis presents a digital driving system of a micro-stepping motor using the full bridge dc-ac power converter. The micro-stepping control of two-phase stepping motor has been realized with improved accuracy. With current compensation based on reactive power calculation, the current closed-loop control system makes the stepping motor current waveform close to an ideal sine wave and reduce the torque pulsation. Thus, the stepping motor runs more smoothly and has better performance. In the thesis, smooth-speed curve is used as the speed-command which makes the micro-stepping motor rotate more smoothly. The thesis uses a low-cost, 32-bit digital signal processor, TMS320LF2808, to implement the micro-stepping drive. The current control of pulse-width modulation and smooth-speed curve is set up by software to reduce circuit complexity. Each step can at most be divided into 256 microsteps. When the motor runs at 15 rpm, the total harmonic distortion of current deceases from 7.65% for 4 microsteps to that of 4.43% for 128 microsteps. On the other hand, if efficient control technique is introduced for no-load operation at 15 rpm and 128 microsteps, the maximum current required reduces form 2.25A to 1.25A. The feasibility of the system is verified experimently.
5
Zhang, Hong-Wei, and 張宏煒. "Speed Tracking Control for Micro Stepping Driver Systems." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/08904875245336224863.
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碩士大葉大學
機械與自動化工程學系
97
This thesis proposes a neural fuzzy network controller (NFNC) for the speed tracking control of linear micro-stepping motors. Linear micro-stepping deriver system has to suffer from nonlinear friction, unknown payload, parameter variation, and high-frequency dynamics in their dynamics. These effects will induce mechanical instability and vibration under low speed motion. In this thesis, an intelligent controller which combines the neural network with the fuzzy logic is developed to overcome these external disturbances. Back-propagation training algorithms are derived to on-line adjust all network parameters. In the hardware, the linear micro-stepping driver system includes a personal computer, a DMC-18x2 driver card, an E-DC driver and a linear hybrid stepping motor. Moreover, a control program is developed for the linear micro-stepping driver system to complete a high-precision speed control using Borland C++ software. Finally, Experiments on a practical linear micro-stepping driver system via the proposed control scheme and a PID controller to compare and verify the excellence of the proposed NFNC methodology.
6
陳立明. "The research of positioning for micro-stepping mechanism." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/21930400525278762939.
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Wang, Yi-Che, and 王奕喆. "Development of Micro-Stepping Motor Drives Using Single-Chip." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/27844830846824810439.
Full textAbstract:
碩士中華科技大學
機電光工程研究所碩士班
103
This paper aims to develop a motor drive system used in sports platform hardware circuits, and mixed-type stepping motor according to the characteristics used to design a bipolar drive system for the use of the motion platform. In this paper, a low-cost single-chip architecture Arduino MEGA 2560 stepper motor control system. According Ardiuno to architecture peripheral controller and expansion circuits required for stepper motor system to complete the control panel of the design, including the stepping motor brake system, full-bridge driver circuits, etc., in order to reduce the hardware circuit and Single-Chip operation to achieve the multi-axis and high precision of the control response. Keywords：Drives, Single-chip, Stepping Motor
8
鄧明欣. "The Research of Positioning for Two-Dimension Micro-stepping Mechanism." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/66052580462796199729.
Full textAbstract:
碩士國立交通大學
機械工程系所
95
Because of low power consumption, ultra-high resolution and rapid response, piezoelectric actuator is one better choice of actuator for micro-stepping mechanism. Micro-stepping mechanism is an impact drive mechanism constructed by using the rapid displacement response of piezoelectric actuator and stick-slip motion of friction mechanism. A mass-damper-spring model is constructed to investigate the dynamics of the mechanism. The experiments are divided into two sections. We will combine the DSP controller and the laser interferometer measuring system to the experiment. To discuss the influences of different piezoelectric actuators and to identify the system of micro-stepping mechanism will help us to begin the next experiment. Next experiment is about the shift and rotation of 2-dimension micro-steeping. To find out the relations between the different waveforms and the displacement of the mechanism is the way to make the result close to the simulation and to achieve the purpose of precise positioning.
9
Der, Wu Ye, and 吳彥德. "An Investigation of a Micro Stepping Motor Vibration and Noise." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/55300929680289978535.
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碩士正修科技大學
機電工程研究所
93
An investigation of noise in a micro motor is studied in this article. The trend towards higher precision and smaller 3C products, requires micro motor to be drived the micro system. Noise in a micro stepped motor is too large to endure in most 3C products. To depress the noise of a micro stepped motor, the dynamic characteristics in this system must be studied. In this article, a micro stepped motor in a digital camera is selected to investigate. HP 35670A analyser is employed to analyse the dynamic characteristics of a motor. Numerical analyse indicates that the paraffin and plastic bearing used can depress the noise of a micro motor.
10
Yu, Chia-Wei, and 游家瑋. "Study on Littral grating spectrometer driven by micro-stepping motor." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/72012140232424848342.
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HUANG, BO-KAI, and 黃柏凱. "Design and implementation of micro-stepping motor driver with CANopen." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/r77e29.
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碩士國立雲林科技大學
電機工程系
105
A three-phase ultra-micro stepping motor controller system with CiA402 is developed in the paper. The CANopen device includes CiA301 and CiA402, and users can easily monitor this system on CANopen master. In addition, this system will follow the position control parameters that set by user to control the acceleration / deceleration of stepping motor. In order to avoid the low-speed resonance and unstable current caused by the mechanical structure of the stepping motor, the proposed stepping motor controller adopts the lead angle control to drive stepping motor in the resonance zone, and ultra-micro stepping control in position zone. The system includes the three speed control mode: 1. Ultra-high resolution micro-stepping mode when speed is less than 100rpm; 2. Lead angle control mode running from 100rpm to 1300rpm; 3. Full step mode when speed faster than 1300rpm. Besides, the proposed speed controller can immediately compensate the torque of motor when load increases, then speed decreasing or out of step situations never happen. Moreover, stepping motor is driven by micro-stepping which utilizes high-resolution encoder for feedback at lower speed, so this system provides the highest resolution approaching 32768 step/rev. The system developed in this paper has tested all function of CANopen, and also verified with an consumer control software. Finally, the speed and position curves of the experimental results demonstrate the system is workable.
12
Tsung, Chen Ming, and 陳明宗. "Reduction of Position Error in Micro-Stepped Linear Stepping Motor." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/23244278889440292117.
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碩士淡江大學
機械與機電工程學系
92
This thesis presents a synchronous frame current control scheme for micro-stepping of two-phase linear stepping motor drive. Due to the wide operating frequency the frequency dependent voltages are decoupled in order to reduce the current following error in the acceleration region and to preserve the dynamical characteristics of the current controller as frequency varies. In addition, effects of dead-time on the current responses are analyzed, and compensation scheme is presented. Causes of positioning error are also analyzed and strategies to improve positioning accuracy are proposed. Finally, experiments are performed to verify all the proposed control schemes. Besides the theoretical analysis and simulations, experimental results are provided in the thesis.
13
Tsao, Kuo-Chang, and 曹國昌. "FPGA-Based Fuzzy Current Controller Design of Micro-Stepping Motor." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/14314245281534713763.
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碩士長庚大學
電機工程研究所
91
This thesis, based on FPGA, mainly considers the synthesis of a fuzzy logic controller (FLC) and its application on a micro-stepping driving circuit. The major modules included in the FLC chip are fuzzifier circuit, rule-based circuit, inference engine circuit, and defuzzifier circuit. Combined with the error signal and integration circuits, the purpose of using a single chip to implement fuzzy current controller can be achieved. Integrating the micro-stepping motor driver, we can verify the accuracy of designed chip by inspecting the tracking performance of controlled current. Hierarchic and modular strategy is used; therefore the complexity of the whole circuit can be reduced. In order to overcome the aging problem and the sensitivity of temperature, a fully digital controller, synthesized by VHDL code, is adopted. Finally, experimental results are provided to verify the functionality of the integrated system.
14
GIU, ZHONG-ZHENG, and 邱忠正. "Software design for multi-stepping-motors control by remote micro-processor." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/26373644944410292751.
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LIAO, FU-SHI, and 廖福士. "Interface design for multi-stepping-motors control by remote micro-processor." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/72161289100602223186.
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Ye, Mei-Ling, and 葉美玲. "An Analysis on Noise and Vibration of a Micro Stepping Motor System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/63743841488643550946.
Full textAbstract:
碩士正修科技大學
機電工程研究所
95
The motivation of this thesis comes from the problem of vibration and noise caused by transmission of the micro stepper motor which applied to high-tech products. Now, micro stepper motor is one of the most important parts on many high-tech products, such as digital camera, scanner, CD-ROM and DVD-ROM etc. Many companies are involving design and development of the industry as well now. For a digital camera, the power resource of driving lens is driven by a micro stepper motor, it brings not only power but also vibration and noise. Therefore, this thesis focuses on digital camera lens structure. How, to depress the noise and vibration of a micro stepping motor is this articles aim. For finite element analysis, the ANSYS software is employed. Both finite element and experimental analyses are used to study. We find that the difference of finite element and experimental results are obserred.
17
Chen, Cheng-Chih, and 陳承志. "Manufacturing technique of microelectrowinning of nickel on copper substrate by single-shaft micro-stepping motor." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/54550114228201388678.
Full textAbstract:
碩士國立中央大學
機械工程研究所
87
This is the second year of a "Three-Dimensional Microwinning project". The object is Micro-winning of nickel on copper substrate and has been investigated to discuss the localized growth of the Ni-deposit and its microstructure. The localized growth was defined as a ratio of the deposit height to the deposit time and radius of deposit area. Nickel sulfamate and Watts solution was used as the electrolyte, and platinum wires in 125 μm diameter were the anode. The anode was controlled to have a micro-translation by a micro-stepping motor. When optimum potentials were applied, the deposit was built on the substrate by moving the anode in the electrolyte. The gap between the anode and the substrate was initially set at 1, 10, 100μm. The anode was controlled to translate at 1, 10 and 100μm per step. Next step translation was drived as the current for the previous step beyond 20 mA. The motion of the anode was controlled by a computer PC through an interphase coupled with a dedicated software. In the present work, the influence of electrode gap and plating voltage on the localized growth of the 3D-deposit was concerned. A faster deposition rate was obtained in this system, roughly three orders of magnitude greater than the traditional technique. The growth rate of the microdeposit was governed mainly by the electrode gap and the plating voltage. Localized growth of the deposits decreases with increasing the gap from 1 to 100μm. At a gap of 1μm , the localized growth increases with increasing the plating voltage from 5 to 8V. At a gap of 10 and 100μm, the localized growth increases to a maximum with increasing the voltage at 5~7V and then decreases gradually at 7~8V. A deposit with fined grains structure is better then that with coarse grains in mechanical properties. Examining the microdeposits through SEM, localized growth of the deposits was compensated by coarse grains structure. Moreover, the deposit obtained at a fixed gap indicated a variation of grain size with the deposit height: the grain size decreases with increasing the height of the deposit.
18
蔡安鎮. "Analysis of the Micro-stepping Mechanism of 2-D and 3-DOF in the View of Impulse Theorem." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/51881710599182065095.
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碩士國立交通大學
機械工程系所
98
Piezoelectric actuator is an efficient driver for micro-stepping mechanism, and it comes with several advantages such as its power-saving function, less noise, compact size, sensitivity, high precision and high converse efficiency. This thesis places emphasis on micro-stepping mechanism with the sliding mechanism of viscosity – friction. Accordingly, paper is in a novel view to the kinematics of micro-stepping mechanism by regarding the piezoelectric actuator as an impulse-mass mechanism. Also the following simulation has been taken for more discussion. This thesis adopts DAQ card to output the non-symmetrical triangular wave in order to control the output of three sets of IDM, along with the observation by CCD. The translation and rotation experiment towards the 2-D ( 2-Dimension) of 3-DOF ( 3- Degree Of Freedom) micro-stepping mechanism is eventually for deliberating the movement relationship between different driving waves done to the same mechanism. Furthermore, comparing those simulated results with each other to find out the reasons of what possibly affects 2-D stepping mechanism has been experienced. Meanwhile, the experiment provides the users with HMI (Human Machine Interface) to operate the movement freely and then to capably gain the precise positioning.
19
Tony and 孫秉揚. "Multi-Tasking and Multi-Axis Random Positioning Control for a Hybrid Stepping Motor Using a Single Chip Micro-Controller." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/61999062634606043974.
Full textAbstract:
碩士大葉大學
電機工程學系
98
In automatic and control, stepper motors can be a simple control and drive to achieve precise positioning. In the resolution, it depends on the motor structure. Generally two-phase hybrid stepper motors have the 1.8 ° step-level. The accuracy of the motor relies on machining accuracy. No-load positioning accuracy is about ± 3 arc minutes (± 0.05 °).A hybrid-type stepping motor has high efficiency and high torque performance, it is the most outstanding. In this article, we will use UDN2998 duplex bridge motor driver IC with a bipolar two-phase hybrid stepper motor with two-phase bipolar excitation mode with the driving motor driving method, the current control is a constant current of drive mode, use the LM393 dual comparator IC and sensing resistor voltage comparison, the voltage waveform results will be compared with the highs and lows of change and the current will remain at a fixed value to achieve the pulse-width modulation (PWM) effect. In motor control, we will use the MCS-51 assembly language code to editor motor control to multi-axis control and multi-tasking mode of multiple simultaneously conduct a number of motor steps, speed, reversible control and with sensors to reached a random positioning control. Key Words : Hybrid stepper motor, UDN2998 dual full-bridge motor driver, two-phase excitation, bipolar-driven method, constant current drive, LM393 dual comparator, pulse width modulation, MCS-51 assembly language, multi-axis multi-tasking, random positioning.
20
Simmons, Robert Andrew. "Control of a flexible link using a micro-stepper motor with acceleration feedback." 1985. http://hdl.handle.net/2097/27542.
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