Analysis of factors affecting component placement accuracy in SMT electronics assembly

2002 ◽  
Author(s):  
E. Kamen ◽  
A. Goldstein ◽  
D. Creveling ◽  
E. Sahinci ◽  
Z. Xiong
Keyword(s):  
Electronics Assembly ◽  
Factors Affecting ◽  
Component Placement ◽  
Placement Accuracy

scholarly journals Developing and Deploying Electronics Assembly Line Optimization Tools: A Motorola Case Study

2008 ◽  
Vol 2 (2) ◽  
pp. 63-78 ◽  
Author(s):  
Thomas M. Tirpak
Keyword(s):  
Optimization Problem ◽  
Integer Program ◽  
Production Equipment ◽  
Electronics Assembly ◽  
Cycle Times ◽  
Linear Integer Program ◽  
Planning Decision ◽  
Placement Accuracy ◽  
High Degree

The assignment of workloads to production equipment is one category of planning decision for an electronics assembly factory. In practice, line balancing requires not only selecting machines with sufficient placement accuracy and feeder capacity, but also address- ing a host of other operational objectives and constraints. Motorola Labs led a multi-year effort to apply mathematical programming to balance a variety of production mix and vol- ume scenarios. By representing the optimization problem as a specially structured, mixed linear-integer program, we were able to incorporate a high degree of reality in the model, simultaneously optimizing fixed setups, handling custom parts, maximizing machine uptime, and mitigating secondary bottlenecks. This paper presents the story of how we developed and deployed a software solution that significantly improved assembly cycle times, setup changeovers, and overall factory productivity, saving the company tens of millions of dollars.

Comparison of Component Placement Accuracy Using Two Intraoperative Fluoroscopic Grid Technologies During Direct Anterior Total Hip Arthroplasty

2020 ◽  
Vol 35 (12) ◽  
pp. 3601-3606 ◽  
Author(s):  
Tyler J. Thorne ◽  
Scott T. Nishioka ◽  
Samantha N. Andrews ◽  
Kristin A. Mathews ◽  
Cass K. Nakasone
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Component Placement ◽  
Total Hip ◽  
Placement Accuracy

Component placement accuracy in two generations of handheld robotics-assisted knee arthroplasty

2021 ◽  
Author(s):  
Chelsea S. Sicat ◽  
James C. Chow ◽  
Bertrand Kaper ◽  
Riddhit Mitra ◽  
Jing Xie ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Component Placement ◽  
Two Generations ◽  
Placement Accuracy

scholarly journals Influence of glenoid wear pattern on glenoid component placement accuracy in shoulder arthroplasty

2022 ◽  
Author(s):  
Kevin A. Hao ◽  
Christopher D. Sutton ◽  
Thomas W. Wright ◽  
Bradley S. Schoch ◽  
Jonathan O. Wright ◽  
...  
Keyword(s):  
Shoulder Arthroplasty ◽  
Glenoid Component ◽  
Component Placement ◽  
Wear Pattern ◽  
Placement Accuracy

Estimation of yield through component placement accuracy in surface Mount PWB assembly

1995 ◽  
Vol 29 (1-4) ◽  
pp. 607-611 ◽  
Author(s):  
Wurong Shih ◽  
Yu-Wen Huang ◽  
K. Srihari ◽  
George R. Westby
Keyword(s):  
Surface Mount ◽  
Component Placement ◽  
Placement Accuracy

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

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