IPC includes test methods for determining various SMT placement equipment attributes, including repeatability, accuracy and attribute de- fects. Each of. 3 Placement Performance Metric. Placement Performance Form IPCF1 . General Performance. Performance Validation. Find the most up-to-date version of IPC at Engineering
|Published (Last):||3 July 2010|
|PDF File Size:||5.12 Mb|
|ePub File Size:||12.96 Mb|
|Price:||Free* [*Free Regsitration Required]|
The SOIC component was selected because it is robust and accurately represents a broad family of coarse-pitch components. Second, because the glass panel is transparent, an optical coordinate measuring machine CMM can illuminate the component outline, making accurate measurement possible. To measure placement machine capability accuracy, it is necessary to eliminate process variables introduced by other surface mount 950.
IPC creates a common method for establishing the performance capability of machines used to place surface mount components. Accuracy must be determined using a NIST-certified gauge, which in this case is a clear glass verification panel with selected component outlines etched into the glass.
Also, because of the convergence of high-accuracy i. Lack of a common, industry-wide benchmarking methodology makes placement machine analysis difficult and time-consuming for suppliers and users.
Placement Equipment Characterization Using IPC-9850
Each combination component and quantity is referred to as a component group: It will reduce the effort required to evaluate and analyze surface mount placement machines, and it also should reduce disagreement between users and suppliers regarding equipment performance and functionality. I;c document can be purchased directly from the IPC www. It also is necessary to minimize material variation due to component quality, component packaging format and substrate quality.
This is accomplished by placing standardized components on clear glass panels that have been coated with a sticky media.
Although this method is not an ideal simulation of jpc actual production environment, it was selected to eliminate as much assembly variation as possible so that it could be performed at various locations.
Five component types were selected to represent the full range of components placed by this type of equipment: Each PVP contains the following component types and quantities. Although some commonality does exist, most suppliers historically have developed their own methods for establishing placement performance in terms of placement rate, accuracy, repeatability, etc.
Both components are economical and available in tape-and-reel, which are key attributes. This approach has two distinct advantages.
IPC combines placement rate and placement quality so speed and accuracy parameters depend on each other. Contact him at ; E-mail: These glass panels also must be certified using an internationally recognized standards institute. Optical CMMs are delicate instruments that require accurate calibration.
A single glass panel, referred to as the placement verification panel PVPhas been developed and standardized.
Placement equipment evaluations always have been confusing ipf complicated. They also are environment sensitive, so they must be used in a controlled environment. The accuracy and repeatability of the optical CMM must be considerably better than the accuracy and repeatability of the placement machine being evaluated.
985 years ago, the IPC — Association Connecting Electronics Industries sponsored an effort to develop a placement equipment evaluation model that would be accepted and used by placement machine suppliers and customers alike.
Placement Equipment Characterization Using IPC
To ensure the desired level of accuracy and repeatability, glass slugs are used to represent the more complex devices. A clear glass substrate coated with a sticky media is used for component mounting.
This long overdue document will benefit everyone. Capacitors were selected over resistors because the outside edges are more precise and geometrically accurate.
This document was developed to standardize the parameters, measurement procedures and methodologies used for the specification, evaluation and continuing verification of placement equipment parameters.
The Reliability Performance form, which is opc by users, documents the reliability of factory-installed machines used in production. The Placement Performance Metric form, which is completed by suppliers, reports general machine performance by model type and confirms the performance of a specific machine by serial number. Several standardized forms have been created to ic measurement results.