scan barcode asp.net mobile PRINTED CIRCUITS HANDBOOK in Software

Paint QR Code in Software PRINTED CIRCUITS HANDBOOK

PRINTED CIRCUITS HANDBOOK
QR Code Recognizer In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Generate QR Code In None
Using Barcode encoder for Software Control to generate, create Quick Response Code image in Software applications.
52.9.1 Wrap Post The wrap post cannot be bent or twisted before or after the wire is wrapped to the post. The wrap straightness may not exceed approximately one post diameter or thickness from its perpendicular position.
Denso QR Bar Code Reader In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
QR Code Printer In C#.NET
Using Barcode encoder for .NET Control to generate, create QR image in .NET framework applications.
52.9.2 Wire Wrap Connection Table 52.8 shows the number of wire wrap turns of insulated and uninsulated wire used on the wrapped connection. The connection is made using automatic or semiautomatic wire wrapping devices. For this requirement, countable turns are those turns of bare wire or insulated wire in intimate contact with the corners of the terminals starting at the first contact with a terminal corner and ending at the last contact with a terminal corner (see Fig. 52.36).
QR Code Printer In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
QR Code Generator In .NET Framework
Using Barcode creator for .NET framework Control to generate, create QR Code image in VS .NET applications.
TABLE 52.8 Minimum Turns of Bare Wire Wire Gauge 30 28 26 24 22 20 18 Turns 7 7 6 5 5 4 4
Quick Response Code Creator In Visual Basic .NET
Using Barcode creator for .NET Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
Paint USS Code 128 In None
Using Barcode creator for Software Control to generate, create Code128 image in Software applications.
FIGURE 52.36 Solderless wrap acceptability.(IPC)
Barcode Encoder In None
Using Barcode generator for Software Control to generate, create barcode image in Software applications.
UPC-A Supplement 5 Printer In None
Using Barcode creator for Software Control to generate, create UPC-A image in Software applications.
Maximum turns of bare and insulated wire are governed by the tooling configuration and space available on the terminal. The minimum countable turns must be as stated in Table 52.8. Electrical clearance between terminals as specified by engineering documentation must be maintained. Wire ends should in no case project to the extent that the required electrical clearance is compromised. The wire end should never project more than 0.12 in. (one wire diameter for Class 3) away from the terminal. The wrapped conductors should be free of gaps (that is, each wrap should be in contact with the previous wrap), with turns not overlapping. The first and last one-half turns may have a space between turns, provided that the space does not exceed one diameter of the conductor wire. Excluding the first and last one-half-turns, the wrapped conductors may have a single space between them, if the opening does not exceed one-half the nominal diameter of uninsulated wire (see Fig. 52.37).
EAN13 Creator In None
Using Barcode generator for Software Control to generate, create EAN-13 image in Software applications.
Draw DataMatrix In None
Using Barcode encoder for Software Control to generate, create DataMatrix image in Software applications.
Multiple Wire Wrap Spacing Typically no more than three wires are wrapped to a single post. When more than one wrap is used on a single post, there should be visible clearance between consecutively wrapped wires. The final wire wrap turn on a post must not extend beyond the working length of the post (see Fig. 52.38). The first insulated turn of a higher-level wire wrap may overlap the last turn of uninsulated wire on a lower-level wrap by a maximum of 1 turn for Class 3.
Make USPS OneCode Solution Barcode In None
Using Barcode maker for Software Control to generate, create Intelligent Mail image in Software applications.
Encoding Barcode In VB.NET
Using Barcode maker for .NET Control to generate, create bar code image in .NET framework applications.
ACCEPTABILITY OF PRINTED CIRCUIT BOARD ASSEMBLIES
1D Creator In Java
Using Barcode maker for Java Control to generate, create Linear Barcode image in Java applications.
Draw Bar Code In None
Using Barcode creator for Font Control to generate, create bar code image in Font applications.
FIGURE 52.37 Solderless wrap with more than one space.Acceptability depends upon Class of product. (IPC)
Generate UPC Code In Java
Using Barcode creator for Java Control to generate, create UPCA image in Java applications.
Drawing Matrix Barcode In Visual C#.NET
Using Barcode generation for Visual Studio .NET Control to generate, create 2D Barcode image in Visual Studio .NET applications.
FIGURE 52.38 Multiple solderless wrap example. (IPC)
Generate ECC200 In Java
Using Barcode generation for BIRT reports Control to generate, create Data Matrix image in BIRT applications.
Printing Bar Code In None
Using Barcode maker for Font Control to generate, create bar code image in Font applications.
PCBA MODIFICATIONS
All modifications to PCBAs should be defined and detailed in approved engineering and/or methods documents. Jumper wires are considered components and are defined by engineering documentation for routing, termination, staking, and wire type.
52.10.1 Cut Traces Trace cuts should be at least 0.030 in. wide, with all loose material removed. They should also be sealed with an approved sealant to prevent absorption of moisture. Care should be taken when removing etch from PCBs to prevent damaging the laminate material.
PRINTED CIRCUITS HANDBOOK
Lifted Pins Lifted pins should be cut short enough to prevent the possibility of being shorted to the pad from which they were lifted should they be pushed back down. If the component hole from which the pad was lifted does not contain a jumper wire, it should be filled with solder.
Jumper Wires Jumper wires may be used on all classes of equipment electronic assemblies and in thick-film hybrid technology. The wire may be terminated in PTHs, on terminal standoffs, on circuit lands, or on component leads. It should be noted for Class 3 equipment that a wire cannot be placed into the same PTH with a component lead. Recommended jumper wire is solid, insulated, plated copper wire. It should be the smallest wire diameter that can reliably carry the required current, and the insulation should be capable of withstanding soldering temperatures. Jumper wires should be routed in the shortest x-y route possible (see Fig. 52.39).Wire routing must be documented for each part number.Assemblies having the same part number must be routed in the same pattern.
FIGURE 52.39 Example of X-Y routing of jumper wires. (IPC)
When jumper wires are used on the primary side (component side) of the PCBA, no wire is to pass over or under any components for Class 2 or 3. The wire may pass over lands, provided the wire can be moved away from the land for component replacement. To prevent damage to the wire from excessive heat, care must be taken to avoid running wires near heatsinks or components that generate high temperatures. When jumper wires are used on the secondary side of the PCBA, the jumper wire should not pass through component footprints unless the layout of the assembly prohibits routing in other areas. If this condition occurs, it should be considered a process indicator. There is an exception to this is rule for edge connectors on the PCBA. Jumper wires should not pass over test points or vias used as a test point. Jumper wires should be staked to the base material with an approved adhesive or tape dots or strips intended for this purpose. If adhesives are used, they must be fully cured as part of
Copyright © OnBarcode.com . All rights reserved.