One World, One Industry: IPC APEX EXPO 2025 Marks a Special Anniversary Year
It’s Only Common Sense: Follow Through and Keep Your Promises
American Made Advocacy: Long-time Challenges Confront a New Administration
Modeling an SMT Line to Improve Throughput
June 6, 2018 | Gregory Vance, Rockwell Automation Inc., and Todd Vick, Universal Instruments Corp.Estimated reading time: 5 minutes
Table 2. Sample range of placements per panel versus count of assemblies and forecasted panel volumes.
The idea of using simple regression to develop a model of “placements per panel” to CPH began to develop. This relationship was first studied using production history.
Machine Mathematical Model for CPH
A report was available that contained panels built and total time to build a work order. This report was used to calculate the average CPH per panel for an SMT machine model. A scatter plot with a smoother line was used to view the relationship between the variables for a machine model. The smoother line is a line fitted to the data to explore the potential relationships between two variables, without fitting a specific model, such as a regression line.
There is a relationship between “placements per panel” and CPH but there are points that do not follow the smoother curve. The other observation is that actual CPH values vary greatly compared to the specification value the manufacturer stated.
Since production data was used to model this relationship, all the problem areas outlined earlier represent part of the performance and added noise in the model. Another idea was to use generic product simulation data from the manufacturer. The product simulation information included:
1. Quantity of placements per panel
2. Simulated cycle time for a SMT machine
3. CPH (calculated)
This would filter out the noise from production and machine configuration issues and could then be used to establish a realistic CPH equation. With the simulated cycle time data, the relationship between “placements per panel” and CPH was then studied.
The scatter plot revealed a relationship between “placements per panel” and CPH. Using the Pearson Correlation Coefficient, the strength of the relationship is assessed. At 0.536 it is considered moderate and P-Value of 0.000 means the relationship is statistically significant. This indicates that “placements per panel” is a good predictor of CPH.
To read the full version of this article, which appeared in the May 2018 issue of SMT007 Magazine, click here.
Page 2 of 2Share on:
Suggested Items
One World, One Industry: IPC APEX EXPO 2025 Marks a Special Anniversary Year
03/06/2025 | John Mitchell -- Column: One World, One IndustryThis year marks the 25th anniversary of IPC APEX EXPO and IPC is thrilled to celebrate this event milestone with attendees, exhibitors, and presenters. Their dedication to and involvement in IPC APEX EXPO is directly responsible for its success and their efforts clearly illustrate how the entire electronics manufacturing industry comes together to “Reimagine the Possibilities of Electronics” (our theme for this year).
Imagine the Possibilities: Tech Conference 2025
03/05/2025 | Marcy LaRont, I-Connect007As we approach the 25th anniversary of IPC APEX EXPO, excitement buzzes around the annual Technical Program. Coming off a tremendously successful program in 2024—co-hosted with ECWC16 and with a significant global presence—organizers wanted to match that same level of engagement. In this interview, Stan Rak of SF Rak Company and Udo Welzel of Robert Bosch Mobility Electronics, co-chairs of the Technical Program Committee (TPC), highlight efforts of the volunteer committee to bring another quality technical program to life.
IPC Strengthens Its Global Executive Leadership Team
03/04/2025 | IPCIn an effort to strengthen service to its more than 3,200 corporate global members, IPC announces the transition of two of its executive leadership staff into new IPC roles.
Experience Full Coverage Inspection at Global Industrie 2025
03/03/2025 | TRIDavum-TMC, TRI's distributor, will participate in Global Industrie 2025. Visit Booth #6G87 at Eurexpo Lyon, France, from March 11 to 14, 2025.
SMT007 Magazine: March 2025—Your Golden Ticket to IPC APEX EXPO 2025
03/03/2025 | I-Connect007 Editorial TeamEach year, we dedicate an entire issue to the IPC APEX EXPO event, recognizing its unparalleled opportunities. The event offers a comprehensive suite of professional development opportunities, insightful presentations, and an extensive array of vendors conveniently located in one place. These elements collectively provide a significant boost to your expertise and career advancement within the electronics industry.