The smallest linear slide in the industry

The schema theory prediction that variability of practice would influence the strength of the motor response schema was investigated. Three groups of subjects, defined by much, little, or no variability of distances moved in prior practice on a linear-slide apparatus, completed 12 initial practice trials. Subjects then had 10 trials to estimate a novel distance from a new starting point. Knowledge of results was provided on the first three trials and withdrawn on the last seven trials. No differences in accuracy of production of the novel distance were noted although evidence for a stronger schema by the group with little variability was noted on the second transfer trial. On the trials on which knowledge of results was withdrawn this stronger schema group maintained performance while the other two groups showed a decrement in performance.

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An On-Machine Separation Method for Straightness, Yawing and Rolling Errors of a Linear Slide

Volume 4: Design and Manufacturing ◽

10.1115/imece2009-10438 ◽

2009 ◽

Cited By ~ 2

Author(s):

Eric H. K. Fung ◽

W. O. Wong ◽

M. Zhu

Keyword(s):

Mathematical Proof ◽

Calculated Data ◽

New Method ◽

Motion Error ◽

Error Components ◽

Acquisition Device ◽

Working Principle ◽

Novel Method ◽

Linear Slide ◽

Input Error

A novel method based on Fourier series for the measurement of motion, yawing and rolling error is proposed in this study. In this method, a stationary stage with eight sensors, three of which are laid in the upper row and the rest are positioned in the lower row, is used as the data acquisition device. While the carriage of a lathe is sliding on the bed in one direction, the sensors capture the displacement data from the facing machine profile. Based on the existing “F5S” method, a new method is proposed to obtain the three major time-varying error components, which are the on-machine motion error, the yawing error and the rolling error, together with the shape functions of the machine profile. Mathematical proof and working principle are included in the paper. Verification of the method applicability is carried out by computer simulation. To evaluate the results of the method, the input data and calculated data are compared. It is shown that the new method is capable to separate all input error components with acceptable accuracy.

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Preform and Die Designs for Hot Forging Process of Linear Slide Block

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.419.395 ◽

2013 ◽

Vol 419 ◽

pp. 395-400 ◽

Cited By ~ 1

Author(s):

Cheng Hsien Yu ◽

Jinn Jong Sheu

Keyword(s):

Heat Treatment ◽

Hot Forging ◽

Laser Heat Treatment ◽

Forging Process ◽

Die Filling ◽

Slide Block ◽

Laser Heat ◽

Wear And Corrosion ◽

Linear Slide ◽

Hot Forging Process

In this study, the preform and die designs of hot forging process were proposed for a long-flat slide block. This block is assembled to the linear slide for carrying the moving table. Three different billet geometry designs were proposed to obtain good die filling. The volume of the flash is limited to 30% with a flash thickness design in 3 mm. The forging die was designed with four ejectors to push up the forged part smoothly. The proposed billet geometries and die design were evaluated using CAE simulation. The simulation results indicated that the suitable perform design is able to achieve better material flow. The flash flow control is able to reduce the forming load and improve the die filling. The forging experiments were carried out to verify the proposed method, the experiment results showed good agreement with the CAE simulations. For the Improvement of wear and corrosion resistances of Inconel718 (In718) surface, high velocity oxygen fuel (HVOF) thermal spray coating of micron-sized WC-Cr-C-Ni powder was coated onto Inconel718 surface and laser heat-treatment of the coating was carried out. Porous coating of porosity 2.2±0.4% was prepared by HVOF coating, and it was improved by laser heat-treatment, reducing the porosity to 0.35±0.08%. Micro-hardness of laser heat-treated coating increased more than four times compared to the surface of In718. Friction coefficient decreased by HVOF coating and laser heat-treatment. Wear resistance improved, decreasing the wear depth by the coating and laser heating. The interface between coating and In718 was compacted, and elements diffused from both coating and inconel718 substrate to interface, forming metal rich buffer zone (interface) and enhancing the adhesion of coating. Corrosion resistance improved by coating in sea water 3.5% NaCl solution and in 1M HCl acid, but it worsened in 1M NaOH base. For the improvement of wear and corrosion resistances of Inconel718, HVOF WC-metal power coating and laser heat-treatment are recommended.

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Profile Estimation of Linear Slide in the Presence of Straightness, Yawing and Rolling Motion Errors

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.421.444 ◽

2013 ◽

Vol 421 ◽

pp. 444-448 ◽

Cited By ~ 1

Author(s):

Eric Hoi Kwun Fung ◽

Xin Zheng Zhang ◽

Ming Zhu ◽

Wai On Wong

Keyword(s):

Data Acquisition ◽

Measurement System ◽

Data Acquisition System ◽

Acquisition System ◽

Rolling Motion ◽

Error Separation ◽

Displacement Sensors ◽

Good Repeatability ◽

Linear Slide ◽

Profile Estimation

This paper presents a novel measurement system for the on-machine estimation of the profiles of a linear slide in the presence of three motion errors, i.e. straightness, yawing and rolling. The system consists of eight displacement sensors, a mounting stage and a data acquisition system. The Fourier Eight Sensor (F8S) method is employed for the error separation with software programs written in MATLAB codes. A prototype is designed, built and fitted to an axis of the precision slide. Experiments are performed to test the repeatability of the profile results under three different slide speeds. Results confirm that the proposed measurement system is capable of determining the profiles with good repeatability in the presence of straightness, yaw and roll errors of the slide.

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An Improved Fourier Eight-Sensor (F8S) Method for Separating Straightness, Yawing and Rolling Errors of a Linear Slide

Volume 3: Design and Manufacturing, Parts A and B ◽

10.1115/imece2010-37611 ◽

2010 ◽

Author(s):

Eric H. K. Fung ◽

M. Zhu ◽

X. Z. Zhang ◽

W. O. Wong

Keyword(s):

Iterative Method ◽

Sensor Data ◽

Profile Function ◽

Sensor Reading ◽

Calculated Profile ◽

The Matrix ◽

Spatial Domains ◽

Linear Slide ◽

Simple Equations ◽

Profile Estimation

This paper proposes an improved Fourier eight-sensor (F8S) measurement method for separating the straightness, yawing and rolling motion errors as well as determining the profile of a linear slide. The previous F8S method [1] used the constant parameters C2 and C4 to estimate the profile function f1(θ) in different angle ranges and f2(θ) is also computed with the same fused sensor data. By constant parameters, the profile estimation and error separation are implemented via iterative method which is a time-consuming procedure and can not maintain the acceptable accuracy. Here, the improved F8S method applies the matrix technique instead of the iterative method to estimate the profile functions by three distinct sets of C2 and C4 parameters and different fused sensor data according to the linear slide motion within different angle ranges. Furthermore various errors can be separated through simple equations based on the calculated profile functions. In the second part of this paper the uncertainty induced by the sensor reading error is analyzed in both frequency and spatial domains, and the uncertainty for the profile function can also be obtained. The simulation results confirm that the improved F8S method provides better performance and effectiveness, and is more feasible than the previous F8S method [1].

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