Electron-beam test system for high-speed devices

Scanning ◽  
1987 ◽  
Vol 9 (5) ◽  
pp. 201-204 ◽  
Author(s):  
M. Brunner ◽  
D. Winkler ◽  
R. Schmitt ◽  
B. Lischke
1985 ◽  
Vol 2 (5) ◽  
pp. 74-82 ◽  
Author(s):  
Norio Kuji ◽  
Teruo Tamama ◽  
Takao Yano

1987 ◽  
Vol 7 (2-4) ◽  
pp. 201-207 ◽  
Author(s):  
D.J. Machin ◽  
D.W. Ranasinghe ◽  
G. Proctor

1987 ◽  
Vol 7 (2-4) ◽  
pp. 267-274 ◽  
Author(s):  
F. Komatsu ◽  
M. Miyoshi ◽  
T. Sano ◽  
K. Okumura
Keyword(s):  

1996 ◽  
Vol 31 (1-4) ◽  
pp. 319-330 ◽  
Author(s):  
Koji Nakamae ◽  
Katsuyoshi Miura ◽  
Hiromu Fujioka

Author(s):  
Jongchul Lee ◽  
Youngheum Yeon ◽  
Huisu Kim ◽  
Seunghyun Lee ◽  
Jongseo Chai

Author(s):  
J. E. Johnson

In the early years of biological electron microscopy, scientists had their hands full attempting to describe the cellular microcosm that was suddenly before them on the fluorescent screen. Mitochondria, Golgi, endoplasmic reticulum, and other myriad organelles were being examined, micrographed, and documented in the literature. A major problem of that early period was the development of methods to cut sections thin enough to study under the electron beam. A microtome designed in 1943 moved the specimen toward a rotary “Cyclone” knife revolving at 12,500 RPM, or 1000 times as fast as an ordinary microtome. It was claimed that no embedding medium was necessary or that soft embedding media could be used. Collecting the sections thus cut sounded a little precarious: “The 0.1 micron sections cut with the high speed knife fly out at a tangent and are dispersed in the air. They may be collected... on... screens held near the knife“.


1967 ◽  
Vol 99 (4) ◽  
pp. 932-938 ◽  
Author(s):  
A. ZUPPINGER

Machines ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Jing Wang ◽  
Zhihua Wan ◽  
Zhurong Dong ◽  
Zhengguo Li

The harmonic reducer, with its advantages of high precision, low noise, light weight, and high speed ratio, has been widely used in aerospace solar wing deployment mechanisms, antenna pointing mechanisms, robot joints, and other precision transmission fields. Accurately predicting the performance of the harmonic reducer under various application conditions is of great significance to the high reliability and long life of the harmonic reducer. In this paper, a set of automatic harmonic reducer performance test systems is designed. By using the CANOpen bus interface to control the servo motor as the drive motor, through accurately controlling the motor speed and rotation angle, collecting the angle, torque, and current in real time, the life cycle test of space harmonic reducer was carried out in high vacuum and low temperature environment on the ground. Then, the collected data were automatically analyzed and calculated. The test data of the transmission accuracy, backlash, and transmission efficiency of the space harmonic reducer were obtained. It is proven by experiments that the performance data of the harmonic reducer in space work can be more accurately obtained by using the test system mentioned in this paper, which is convenient for further research on related lubricating materials.


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