The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform
G Spu - One of the best experts on this subject based on the ideXlab platform.
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influence of kinematics on the face grinding process on Lapping Machines
Cirp Annals-manufacturing Technology, 1999Co-Authors: E Uhlma, T Ardel, G SpuAbstract:Abstract The substitution of many Lapping processes by face grinding on Lapping Machines offers a new field of application for the kinematic model of relative motions in Lapping. The selection of path types and velocities between parts and grinding wheels does not, as in Lapping, primarily serve to avoid the profile wear of the wheels. Rather, the process development and thus, the part quality are directly influenced. Ceramic parts are used as an example to illustrate the improvement in performance made possible by the analysis of machining kinematics.
A. E. Novinskiĭ - One of the best experts on this subject based on the ideXlab platform.
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Process-control program for a series of automated polishing–Lapping optical Machines with computer control
Journal of Optical Technology, 2011Co-Authors: S. I. Nefedov, Yu. N. Solov’ev, A. E. NovinskiĭAbstract:A specialized control program has been developed, intended for carrying out sessions in which the surfaces of optical items are shaped on automatic polishing–Lapping Machines with numerical program control based on the Aerotech A3200 controller. The program makes it possible to monitor various aspects of process sessions, to correctly respond to emergencies, and to resume execution after they are overcome.
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process control program for a series of automated polishing Lapping optical Machines with computer control
Journal of Optical Technology, 2011Co-Authors: S. I. Nefedov, Yu N Solovev, A. E. NovinskiĭAbstract:A specialized control program has been developed, intended for carrying out sessions in which the surfaces of optical items are shaped on automatic polishing–Lapping Machines with numerical program control based on the Aerotech A3200 controller. The program makes it possible to monitor various aspects of process sessions, to correctly respond to emergencies, and to resume execution after they are overcome.
Prasit Wonglersak - One of the best experts on this subject based on the ideXlab platform.
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Classification of Initial Stripe Height Patterns using Radial Basis Function Neural Network for Proportional Gain Prediction
2013Co-Authors: Prasit Wonglersak, Prakarnkiat Youngkong, Ittipon CheowanishAbstract:Abstract—This paper aims to improve a fine Lapping process of hard disk drive (HDD) Lapping Machines by removing materials from each slider together with controlling the strip height (SH) variation to minimum value. The standard deviation is the key parameter to evaluate the strip height variation, hence it is minimized. In this paper, a design of experiment (DOE) with factorial analysis by twoway analysis of variance (ANOVA) is adopted to obtain a statistically information. The statistics results reveal that initial stripe height patterns affect the final SH variation. Therefore, initial SH classification using a radial basis function neural network is implemented to achieve the proportional gain prediction. Keywords—Stripe height variation, Two-way analysis of variance (ANOVA), Radial basis function neural network, Proportional gain prediction. I
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An Adaptive Compensated Proportional – Derivative Controller Using Artificial Neural Networks for Hard Disk Drive Lapping Machines
2012Co-Authors: Prakarnkiat Youngkong, Prasit WonglersakAbstract:In this paper, an adaptive compensated proportional – derivative controller using the artificial neuralnetworks was presented for hard disk drive head Lapping Machines where standard deviation reduction ofthe final stripe height was determined to be a key performance. Hebbian learning technique was applied toadjust the gains. More than 10,000 heads from two different products that final stripe heights are different,were lapped using learning rate = 0.20, Kpc=13 and Kdc=16. As a result, 89.41 percent of the heads withstandard deviation less than 6 μΩ was obtained. Keywords : Adaptive Compensated Proportional – Derivative Control (ACPD) / Hard DiskDrive Head / Deviation of Stripe Height / Hebbian learning
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an adaptive compensated proportional derivative controller using artificial neural networks for hard disk drive Lapping Machines
วารสารวิจัยและพัฒนา มจธ., 2012Co-Authors: Prakarnkiat Youngkong, Prasit WonglersakAbstract:In this paper, an adaptive compensated proportional – derivative controller using the artificial neuralnetworks was presented for hard disk drive head Lapping Machines where standard deviation reduction ofthe final stripe height was determined to be a key performance. Hebbian learning technique was applied toadjust the gains. More than 10,000 heads from two different products that final stripe heights are different,were lapped using learning rate = 0.20, Kpc=13 and Kdc=16. As a result, 89.41 percent of the heads withstandard deviation less than 6 μΩ was obtained. Keywords : Adaptive Compensated Proportional – Derivative Control (ACPD) / Hard DiskDrive Head / Deviation of Stripe Height / Hebbian learning
V. A. Gorshkov - One of the best experts on this subject based on the ideXlab platform.
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Series-APD automatic Lapping Machines developed by NPO Optika
Journal of Optical Technology, 2015Co-Authors: V. A. Gorshkov, N. G. KorneevAbstract:The accumulated experience of the Optika Scientific Manufacturing Company in the creation of equipment for processing large-scale optical items by controllable shaping made it possible to bring a new series of Machines into production. Long-term experience in the operation of Machines of various modifications, designs, and kinematic implementations has shown that they work reliably and can process optical items with a complicated surface shape and can be guaranteed to achieve a quality that meets the criterion of an rms deviation of λ/40−λ/80 (wavelength λ=0.6328 μm).
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Using magnetorheological methods to process optical items on a series of automated polishing–Lapping Machines
Journal of Optical Technology, 2011Co-Authors: L. K. Gleb, V. A. Gorshkov, F. P. Khlebnikov, G. R. Gorodkin, E. V. SemenovAbstract:Prototypes of two forms of magnetorheological polishing modules have been developed for a series of polishing–Lapping Machines: a one-piece form, in which the workpiece is located above the polishing tool, and a spread-out form, in which the workpiece is located under the polishing tool. The operation of the modules during magnetorheological processing of samples of optical items has been tested.
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using magnetorheological methods to process optical items on a series of automated polishing Lapping Machines
Journal of Optical Technology, 2011Co-Authors: L. K. Gleb, V. A. Gorshkov, F. P. Khlebnikov, G. R. Gorodkin, E. V. SemenovAbstract:Prototypes of two forms of magnetorheological polishing modules have been developed for a series of polishing–Lapping Machines: a one-piece form, in which the workpiece is located above the polishing tool, and a spread-out form, in which the workpiece is located under the polishing tool. The operation of the modules during magnetorheological processing of samples of optical items has been tested.
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Compensating the distortions detected by interference monitoring of off-axis aspheric surfaces when null correctors are used
Journal of Optical Technology, 2011Co-Authors: V. A. Gorshkov, V. A. Kutvitskiĭ, A. S. Savel’evAbstract:This paper describes a method of interference monitoring of off-axis aspheric surfaces using wave-front null correctors, as well as an algorithm and program for taking distortion into account when constructing topographic maps of off-axis aspheric surfaces shaped on automatic polishing–Lapping Machines with computer control.
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shaping off axis aspheric surfaces on automated computer controlled polishing Lapping Machines
Journal of Optical Technology, 2011Co-Authors: V. A. Gorshkov, A S Nevrov, A S Savelev, A V PodobryanskiĭAbstract:Advances in the computer technology of automated shaping of large optical items so that diffraction quality of the image is obtained, developed at Optika Scientific-Manufacturing Organization, make it possible to expand the technological possibilities of shaping aspheric surfaces—in particular, when creating off-axis aspheric mirrors of complex configuration. This paper demonstrates the possibilities of the method of automated shaping of the surface, using as an example the automated shaping of various types of off-axis mirrors about 1000 mm in diameter at the grinding and polishing stage. The technical parameters of fabricated off-axis mirrors are presented, and problems of the automated shaping of off-axis mirrors are indicated, along with technological ways of solving them.
E Uhlma - One of the best experts on this subject based on the ideXlab platform.
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influence of kinematics on the face grinding process on Lapping Machines
Cirp Annals-manufacturing Technology, 1999Co-Authors: E Uhlma, T Ardel, G SpuAbstract:Abstract The substitution of many Lapping processes by face grinding on Lapping Machines offers a new field of application for the kinematic model of relative motions in Lapping. The selection of path types and velocities between parts and grinding wheels does not, as in Lapping, primarily serve to avoid the profile wear of the wheels. Rather, the process development and thus, the part quality are directly influenced. Ceramic parts are used as an example to illustrate the improvement in performance made possible by the analysis of machining kinematics.
