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
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The accuracy and repeatability of the optical CMM must be considerably better than the accuracy and repeatability of the placement machine being evaluated. Five component types were selected to represent the full range of components placed by this type of equipment: Each combination component and quantity is referred to as a component group: IPC combines placement rate and placement quality so speed and accuracy parameters depend on each other.
The 9805 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.
To measure placement machine capability accuracy, it is necessary to eliminate process variables introduced by other surface mount processes.
Lack of a common, industry-wide benchmarking methodology makes placement machine analysis difficult and time-consuming for suppliers and users. 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.
Several standardized forms have been created to record measurement results. Both components are economical and available in tape-and-reel, which are key attributes.
Placement Equipment Characterization Using IPC
A single glass panel, opc to as the placement verification panel PVPhas been developed and standardized. They also are environment sensitive, so they must be used in a controlled environment. IPC creates a common method for establishing the performance capability of machines used to place surface mount components.
This is accomplished by placing standardized components on clear glass panels that have been coated with a sticky media. Also, because of the convergence of high-accuracy i. This document can be purchased directly from the IPC www.
Second, because the glass panel is transparent, an optical coordinate measuring machine CMM can illuminate the component outline, making accurate measurement possible. Contact him at ; E-mail: Optical CMMs are delicate instruments that require accurate calibration. Although this method is not an ideal simulation of an actual production environment, it was selected to eliminate as much assembly variation as possible so that it could be performed at various locations.
IPC Releases IPCA, Surface Mount Placement Characterization | IPC
The Reliability Performance form, which is completed by users, documents the reliability of factory-installed machines used in production. To ensure the desired level of accuracy and repeatability, glass slugs are used to represent the more complex devices. Accuracy must be 8950 using a NIST-certified gauge, which in this case is a clear glass verification panel with selected component outlines etched into the glass.
These glass panels also must be certified using an internationally recognized standards institute. Several 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.
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.
Capacitors were selected over resistors because the outside edges are more precise and geometrically accurate. A clear glass substrate coated with a sticky media is used for component mounting.
This approach has two distinct advantages. It also is necessary to minimize material variation due to component quality, component packaging format and substrate quality. The SOIC component was selected because it is robust and accurately represents a broad family of coarse-pitch components.
Placement Equipment Characterization Using IPC-9850
This document was developed to standardize the parameters, measurement procedures and methodologies used for the specification, evaluation and continuing verification of placement equipment parameters.
Placement equipment evaluations always have been confusing and complicated. Each PVP contains the following component types and quantities. This long overdue document will benefit everyone.