As EMS companies have ramped up speeds to meet the high demand for electronics, equipment manufacturers have responded by developing machines that quickly shift from handling one package style to another with fewer sacrifices in precision. To help industry determine the best equipment setup to meet needs for speed, capability and accuracy, IPC has released revision A to IPC-9850: Surface Mount Placement Characterisation, making it far simpler to quantify the performance of placement equipment.
The comparison provided by the standard shows how machine speeds change as accuracy requirements rise. The evaluations are performed by placement of test components on test boards that are specified in the standard. These boards have five different types of component parts with various quantities of each.
IPC-9850A now complies with common methodologies for measurement system analysis (MSA) and is compatible with the approach used by ASQ and other groups. The new method calculates the expanded measurement uncertainty (EMU) which combines all the measurement uncertainty of the system. The individual factors included in the EMU are gauge repeatability and reproducibility (GR&R) variance, non-linearity, resolution, hysteresis and artefact uncertainty.
Calculating the EMU is a more stringent test of measurement capability since it adds many additional factors that were not calculated in the original IPC-9850 GRR and accuracy report, while keeping the same passing process to tolerance ratio of less than 25%.
Read more...Electronic News Digest
News
A brief synopsis of current global news relating to the electronic engineering fields with regards to company finances, general company news, and engineering technologies.
Read more...Correction: Marijana Abt, Rebound Electronics
News
In the August issue of Dataweek magazine, the article titled ‘Celebrating innovation, leadership, and the next generation’ featured Marijana Abt, senior account manager at Rebound Electronics. Owing ...
Read more...Trasna and RF Design announce distribution agreement RF Design
News
Trasna and RF Design have announced a strategic distribution agreement for cellular IoT solutions which will ensure seamless availability of Trasna’s cellular connectivity solutions.
Read more...Comtest hosts channel partners Comtest
News
Comtest, together with FLUKE, recently set the stage for an unforgettable afternoon as they welcomed over 80 Channel Partners to their annual celebration of excellence.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version