Technical Library: error (Page 1 of 25)

Making Sense of Accuracy, Repeatability and Specification for Automated Fluid Dispensing Systems

Technical Library | 2013-11-14 10:43:40.0

Understanding accuracy and repeatability is an important step to analyze fluid dispensing system performance. They can also be prone to misinterpretation when reviewing a product specification. A dispensing motion system can be made to perform better or worse under different operating conditions. This article will explain accuracy and repeatability, and how they can be applied to different specifications. It will also discuss key considerations when interpreting accuracy and repeatability for decision making.

Nordson ASYMTEK

Back to Basics – Why Clean?

Technical Library | 2011-06-28 16:10:29.0

ZESTRON America’s spring edition of ZESTRON News goes back to basics providing the latest information on the topics of cleaning in the electronics manufacturing industry.

ZESTRON Americas

Soldering Faster At Lower Temperatures: A Performance Comparison

Technical Library | 1999-05-09 13:14:02.0

Studies and tests of comparative soldering iron thermal performance at low temperatures - Metcal direct power soldering technology compared to conventional stored energy soldering irons from leading manufacturers.

Metcal

Effective Qualification of Soldering Iron Performance Criteria

Technical Library | 2012-11-27 14:06:48.0

Quality managers and line supervisors are routinely tasked with the responsibility of ensuring that the hand soldering process is under control. The method most commonly used is to measure the idle tip temperature of the soldering station and to use this reading as a benchmark of system compliance. This method, although popular is now being seriously questioned by many industry professionals as being irrelevant in qualifying true system process control. This document aims to present a practical view of what factors are important for successful hand soldering and to suggest an alternative procedure for qualification that is simple, repeatable and directly related to the effectiveness of the soldering station.

Metcal

Hand Soldering, Electrical Overstress, and Electrostatic Discharge

Technical Library | 1999-05-09 13:07:16.0

This paper will give the reader a general understanding of EOS and ESD phenomena. It specifically addresses hand soldering's role in EOS and ESD and how to protect against and test for potential problems. It discusses how Metcal Systems address EOS and ESD concerns and how they differ from conventional soldering systems.

Metcal

Extending Soldering Iron Tip Life

Technical Library | 1999-05-09 13:05:12.0

This Technical Note discusses the construction of solder tips, the various failure modes associated with tip plating (cracking, wear, corrosion, and dewetting), how to diagnose those failure modes, and specific practices that can be taken to minimize or eliminate each one.

Metcal

Preparation for Reflow Profiling

Technical Library | 2019-05-24 09:22:59.0

There is a smaller process window and a much narrower margin of error when creating and using lead-free reflow profiles for surface mount parts on printed circuit boards (PCBs). Solder balls, dewetting, tombstones, voids, and head-on-pillow problems will occur much more frequently because lead-free alloys behave differently than eutectic pastes. Problems are compounded due to the extra heat necessary for some lead-free pastes to reach their melting points.

ACI Technologies, Inc.

Design of Experimentation for Affordability

Technical Library | 2019-07-11 11:07:08.0

Affordability is not exactly the primary word which comes to mind when discussing the use of design of experiments (DOE) principles, but is generally accepted as a necessary part of the engineering activities required in the development of a product or process. However, a number of studies have indicated that the cost savings derived from a well deliberated experimental design can be substantial in the initial stages where the conditions or parameters of a process are determined. Some studies have shown a greater than 50% cost savings compared to the more conventional means of trial and error approaches to process development. At ACI Technologies (ACI), we have found the use of DOE techniques fundamental in eliminating extraneous costs otherwise spent on unnecessary testing.

ACI Technologies, Inc.

Thermal Profiling for Reflow

Technical Library | 2019-05-21 17:23:47.0

Reflow temperature profiling is the most important aspect of proper control of the solder reflow process. It may appear to some to be a magical art practiced by a select experienced few, who are able to divine the proper settings for a reflow oven by reading graphs as if they were tea leaves. This does not have to be true. This article outlines a systematic method by which engineers and technicians can implement a successful reflow process from scratch.

ACI Technologies, Inc.

Fiducial Marks

Technical Library | 2019-06-17 15:09:43.0

Very often pick and place machines are programmed using CAD data. This data increases the accuracy, precision, and repeatability of its component placement objectives. CAD data makes fine pitch and small component assemblies repeatable, but cannot adjust to a particular board unless it is exactly the same size and shape of the original board used for programming. The process by which printed circuit boards (PCBs) are made only allows some minor changes inboard size and shape, but these small differences are enough for parts to be misplaced. For this reason we use fiducial marks to increase the chances of precise component alignment.

ACI Technologies, Inc.

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