scholarly journals Development of automatic measuring machine for lead error in threaded cutting tools.

1987 ◽  
Vol 53 (12) ◽  
pp. 1887-1892
Author(s):  
Kazuo MARUYAMA ◽  
Nobuhiko OGURA ◽  
Shinichi TOTSUKA
Keyword(s):  
Cutting Tools ◽  
Automatic Measuring ◽  
Measuring Machine ◽  
Lead Error

Measurements of the Cape Astrometric Survey of the Southern Hemisphere

1978 ◽  
Vol 48 ◽  
pp. 515-521
Author(s):  
W. Nicholson
Keyword(s):  
Southern Hemisphere ◽  
Automatic Measuring ◽  
Measuring Machine ◽  
Final Selection ◽  
Selection Of

SummaryA routine has been developed for the processing of the 5820 plates of the survey. The plates are measured on the automatic measuring machine, GALAXY, and the measures are subsequently processed by computer, to edit and then refer them to the SAO catalogue. A start has been made on measuring the plates, but the final selection of stars to be made is still a matter for discussion.

scholarly journals Development of 2-dimensional Profile Automatic Measuring Machine Using Pinhole Image Projection Method

2004 ◽  
Vol 70 (5) ◽  
pp. 705-710
Author(s):  
Nobuyuki AKIYAMA ◽  
Masahiro YOSHIDA ◽  
Bin Che Sakri SHAMSOL ◽  
Ken MIYAHARA ◽  
Kazutoshi KUWAHARA
Keyword(s):  
Projection Method ◽  
Automatic Measuring ◽  
Pinhole Image ◽  
Image Projection ◽  
Measuring Machine

scholarly journals The COSMOS Plate Measuring Machine

1974 ◽  
Vol 61 ◽  
pp. 299-300
Author(s):  
N. M. Pratt
Keyword(s):  
Research Council ◽  
Science Research ◽  
Schmidt Telescope ◽  
Automatic Measuring ◽  
Measuring Machine ◽  
Science Research Council

The new 48-in. Schmidt telescope of the U.K. Science Research Council is being commissioned at Siding Spring in Australia. Its potential both for extra-galactic and galactic research is enormous but this potential can only be fully exploited with an automatic measuring machine.

scholarly journals The U.S. Naval Observatory Parallax Program

1974 ◽  
Vol 61 ◽  
pp. 159-166
Author(s):  
K. Aa. Strand ◽  
R. S. Harrington ◽  
C. C. Dahn
Keyword(s):  
Systematic Errors ◽  
Statistical Investigation ◽  
Unit Weight ◽  
Measuring Error ◽  
Automatic Measuring ◽  
Naval Observatory ◽  
Ubv Photometry ◽  
Measuring Machine ◽  
The Mean ◽  
The U.S

The U.S. Naval Observatory program on trigonometric stellar parallaxes with the 61-in. astrometric reflector has been in progress since 1964. To date 201 definitive and 8 preliminary negligible parallaxes have been published, including the UBV photometry of these stars. Data for an additional 35 stars are still unpublished.The mean error in position for an image of unit weight is 1.2 μ or 0″.016, of which 0.8 μ originates from the measuring error of the automatic measuring machine.An error of the parallax of 0″.004 can usually be obtained with 40 or fewer plates and with an average parallax factor of 0.7.A statistical investigation of the derived parallaxes shows that they are free from significant internal systematic errors.

The U.S. Naval Observatory Automatic Measuring Machines, Present and Future

1971 ◽  
Vol 11 ◽  
pp. 119-121
Author(s):  
K. Aa. Strand
Keyword(s):  
High Speed ◽  
State Of The Art ◽  
Nuclear Research ◽  
Measuring System ◽  
Automatic Measuring ◽  
Design Specifications ◽  
The Past ◽  
Naval Observatory ◽  
Measuring Machine ◽  
The U.S

The automatic measuring machine acquired by the U.S. Naval Observatory in 1966 was built by Nuclear Research Instruments (NRI) in Berkeley, California, based upon design specifications by the Naval Observatory and upon a considerable amount of innovative engineering by NRI. The performance of the machine and the results obtained over the past four years clearly show that a reliable high speed measuring system has been achieved. Hence, when requirements developed for a second machine it was decided to copy the earlier machine, incorporating modifications which the present state of the art permit and which were not available when the machine was designed in 1963.

Influence of CAM Strategies on the Wear of Cutting Tools

2016 ◽  
Vol 834 ◽  
pp. 90-95
Author(s):  
Rudolf Zaujec ◽  
Peter Pokorný
Keyword(s):  
Tool Wear ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Milling Process ◽  
Cnc Milling ◽  
Cutting Tool Wear ◽  
Digital Microscope ◽  
Measuring Machine

This paper presents research on the influence of CAM strategies for wear and durability of milling tools. We used two machining principles in this process. In the first instance was constant point of contact with the tool and machining surface. The second method was changing point of the cutting edge in the milling process. Material of tool was hard alloy and high speed steel for machining steel 40CrMnMo7 and C45. The shape of cutting tool was a “Ball Nose” end mill. A DMU 85 monoBLOCK 5-axis CNC milling machine was used. The cutting tool wear was measured in Zoller Genius 3, universal measuring machine and digital microscope, Dino lite 2. The results show differences of cutting tool wear depending on the milling strategy and material of tool.

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