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7 Successful Oven Reflow Successful soldering is dependent on several factors including suitable, well-maintained, and controlled reflow equipment; good-quality solderable parts; a thermally balanced board designed for the reflow process; a well-tested and reliable solder paste; a proven time-temperature profile; and good thermometry techniques 47371 Adequately Maintained and Controlled Reflow Equipment The oven should have small thermal differentials across the width of the tunnel and should be capable of adequate heating and cooling ramps as well as adequate zone separation characteristics It should be stable for a given zone setting, not varying by more than a couple of degrees centigrade Similarly, the conveyor speed should be stable, not varying by more than 1 cm to 2 cm/min 47372 Good-Quality Solderable Parts The best reflow equipment, profiles, and solder paste will not make up for inadequacies in part quality or restore solderability. pdf417 java library PDF417Reader (ZXing 3.4.0 API)
Locates and decodes a PDF417 code in an image. Result · decode (BinaryBitmap image ... Methods inherited from class java .lang.Object · clone, equals, finalize ... pdf417 java Java PDF417 reader class library makes PDF417 barcode reader in ...
Easily integrate PDF417 reader in Java applications to scan and read PDF417 barcodes in Java SE, Java EE and Java ME platforms. Good solderable parts and boards are a must for successful reflow 47373 Coplanarity Coplanarity of component leads, BGA balls, or CCGA columns is a mustAll component leads should share a common seating plane within the specified tolerances associated with the component vendor s specification The coplanarity requirement also depends on the dispensed solder paste height and paste deposit uniformity, as the solder paste accommodates some small differences in lead-to-lead coplanarity both as a paste and also as the solder assumes the characteristic dome shape upon melting.. pdf417 java open source Welcome to Barcode4J
Introduction. Barcode4J is a flexible generator for barcodes written in Java . It's free, available under the Apache License, version 2.0. pdf417 scanner javascript Building HTML5 Barcode Reader with Pure JavaScript SDK - Medium
15 Jan 2018 ... In this post, I will use the pure JavaScript barcode SDK to create a simple client- side HTML5 barcode reader app, which works in any WebRTC ... NOTe In order for the text in the tabbed panel to be refreshed, an action has to happen on the page, such as switching tabs. However, if you want to force the refresh automatically, select the CustEmail binding and set its ChangeEventPolicy property to ppr. This is a feature called partial page refresh, which is covered later in the book. This will force the component that references the binding to automatically refresh when the binding has been updated. 47374 Component Storage Extended storage should be avoided and parts should be kept cool and dry prior to use Sufficient quality control methods should be established to ensure that the solder and components are solderable Plastic molded parts such as plastic quad flat packs (PQFPs) and plastic ball grid arrays (PBGAs) can absorb moisture from the atmosphere over time When moisture-laden plastic packages are subjected to reflow soldering, the entrapped vapor may expand to the point where the package fractures, often damaging the silicon die and associated wires internal to the package This phenomenon is commonly known as popcorning throughout the industry Ensure that plastic packaged components are stored in unopened bags as supplied by the component vendor until time of use. pdf417 javascript library Linear Barcode , QR Code, DataMatrix and PDF417 API - Dynamsoft
Dynamsoft Barcode Reader JavaScript Edition is a JavaScript API for barcode scanning based on the WebAssembly technology. This demo supports scanning ... java pdf417 parser zxing/zxing: ZXing ("Zebra Crossing") barcode scanning ... - GitHub
ZXing ("Zebra Crossing") barcode scanning library for Java , Android - zxing/zxing . Once the components are removed from the manufacturer s packaging, follow IPC/JEDEC guidelines1 for useful shelf-life in the unbaked state and any bake-out requirements prior to soldering Parts must be suited for the temperature required by the reflow process Lastly, ensure that component contact or surface finish is compatible with the solder being used, be it leaded or lead-free 47375 Board Design for Oven Soldering Thermal balance of the board design is important for reliable and adequate reflow Ensure that a design for manufacturing (DFM) review of the board has been done and that thermally massive components are not relegated to one portion of the board Also, it is desirable to distribute smaller components rather than to create component fields to permit uniform thermal balance across the board Components should be spaced adequately to prevent shadowing of smaller devices on the board by larger, neighboring components. PUB Go cognew(Cog_LCD, @stack2) cognew(Cog_SetMotPower, @stack3) cognew(Cog_RunMotor(PWM), @Stack4) cognew(Cog_FigGain, @stack5) Encoder.Start(0, 1, 0, @Pos) 'Read the encoder position MaxGain:=2000 'Maxim gain MinGain:=100 'Minimum gain repeat PotOne:=UTIL.Read3202_0 'Read pot PRI cog_LCD LCD.INITIALIZE_LCD repeat LCD.POSITION (1,1) LCD.PRINT(STRING("Err=" )) LCD.PRINT_DEC(PositionError) 'manage the LCD 'initialize the LCD 'LCD loop 'Go to 1st line 1st space 'Error id 'print error (continued) This is particularly important in IR ovens without the forcedconvection option If the oven is characterized by poor uniformity across the tunnel width, the board should be oriented, if possible, to take advantage of the imbalance; ie, the board edge with greatest thermal mass should be aligned to the oven edge with the highest recorded process temperatures Board components should be designed far enough away from board edges to preclude any mechanical interference with the pin-chain conveyor Since the oven rails can have an influence on the reflow or damage of bottom-side components, leave enough edge clearance on the board to accommodate the pin-chain pin length plus some additional margin in case the board is moved from one reflow oven to another 47376 Paste and Profile. pdf417 java api dbrjs - npm
12 Dec 2018 ... Dynamsoft Barcode Reader JS is a recognition SDK which enables you to embed barcode reading functionality in your web, desktop, and ... pdf417 java api PDF-417 Java Control-PDF-417 barcode generator with free Java ...
Download PDF-417 barcode generator for Java free trial package to create high ... PDF417 is a continuous 2D symbology which is invented by Dr. Ynjiun P. ... and copy "com.keepautomation.barcode.jar" file to your Java project library folder .
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