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Entre el desinterés de México y la tolerancia de Estados Unidos: La Migración indocumentada, 1965-1986.

Una Recuento Histórico Necesario: El Contexto de la Migración entre México y Estados Unidos

2.3 Entre el desinterés de México y la tolerancia de Estados Unidos: La Migración indocumentada, 1965-1986.

Redline document to compare IPC/WHMA-A-620 revision B to A Red strikeout indicates deletion, blue underline indicates new words Only significant technical changes are shown

9.1.1 Hardware Mounting - Jackpost - Height

This section covers the height relationship of the face of the jackpost to the associated connector face. This is critical to obtain maximum connector pin contact.

Hardware stack-up for mounted connectors may be varied in order to locate the face of the jackpost flush to ±0.75 mm [0.030 in] below with the face of the connector.

Acceptable – Class 1,2,3

 Jackpost face is flush to ±0.75 mm [0.030 in] below with the face of the connector.  Height is obtained by adding or removing

washers (supplied with jackpost).

Defect – Class 1,2,3

 Jackpost face extends above the connector

face (620A Figure 9-2).

 Face of jackpost is more than ±0.75 mm [0.030 in] below with the connector face (see Figure 9-3).

9.1.3 Hardware Mounting – Retaining Clips

Acceptable – Class 1,2,3

 Retaining clip is properly oriented.  Screw is completely through threaded

portion of the clip.

 Retaining clip (620A Figure 9-NEWE2 A)

is properly oriented

Defect – Class 1,2,3

 Retaining clip is improperly oriented (threaded side of clip is on the mating side of connector flange).

o Flat side of retaining clip is not oriented on the mating side of the connector

o Upside down (620A Figure 9-NEW4)

 Screw is not completely through the

threaded device. Figure 9-1 Figure 9-2 Figure 9-3 Figure 9-5 Figure 9-6 Figure 9-7 Figure 9-8

Redline document to compare IPC/WHMA-A-620 revision B to A Red strikeout indicates deletion, blue underline indicates new words Only significant technical changes are shown

9.1.4 Hardware Mounting – Connector Alignment When torque requirements are established, see 17.2.

When the connector/backshell/accessory uses teeth to interlock the mating surfaces, the connector assembly procedures shall [D1D2D3] include a process that ensures the teeth are fully engaged prior to tightening. Figure 9-9 shows an acceptable mating where the alignment teeth are fully engaged. Figure 9-10 shows two examples of teeth that are not fully engaged. The locking ring is removed in these illustrations to show the condition; the interlocking teeth are not visually inspectable.

9.2.1 Strain Relief – Clamp Fit

Clamps, as specified on the drawing, shall [D1D2D3] support cables, harnesses or individual wires to prevent wire movement that may place strain on the wire/connector terminations. Split lock washers incorporated as part of the backshell or strain relief clamp shall [D1D2D3] be fully compressed.

If the number of wires terminating into the connector is insufficient to allow the strain relief clamp to grip the wires properly, then insulating tape, sleeving or a grommet of an approved material shall [D1D2D3] be used to “build-up” the bundle diameter to provide contact and support between the cable and the strain relief clamp. The build-up material may also be required to provide protection of the insulated wires from damage caused by the connector clamp.

Build-up material is referred to as “sleeving” in the following criteria. The sleeving criteria apply only when such material is applied to the wire bundle. Build-up material, when used, shall [D1D2D3] be as specified on engineering documentation.

Spacers, when used, shall [N1D2D3] be as specified on engineering documentation.

Acceptable – Class 1,2,3

 Sleeving is flush with the end of clamp (arrow).

 There is space between at least 1 of the inner surfaces of a clamp and the backshell ear on 1 side.

 Spacers, if present, are mounted under the

same adapter clamp on both sides of the cable.

Defect – Class 1,2,3

 Sleeving extension beyond clamp causes stress on the wires (A).

 The split lock washers are not collapsed (B).  Clamps do not captivate and support the

cable.

 Clamps do not prevent movement of the cable.

 Damage to sleeving that exposes the harness or other protected material (not shown).  Spacers, if required, are not present or are

not mounted under the same adapter clamp on both sides of the cable.

 Splice or ferrule located under the backshell clamp.

Figure 9-12

Figure 9-13 Figure 9-14

Redline document to compare IPC/WHMA-A-620 revision B to A Red strikeout indicates deletion, blue underline indicates new words Only significant technical changes are shown

9.2.2.1 Strain Relief – Wire Dress - Straight Approach

Process Indicator – Class 2,3 Defect – Class 3

 Wire length is excessive outside the contour of the wire bundle (A).

9.2.2.2 Strain Relief – Wire Dress – Side Approach

Process Indicator – Class 2 Defect – Class ,3

 Wire length is outside the contour of the wire bundle excessive (A).

9.3.1 Sleeving and Boots - Position

Not Established – Class 1 Process Indicator – Class 2 Defect – Class 3

 Boot does not extend to the end of the first accessory attachment area.

9.4.2 Connector Damage - Limits - Hard Face - Mating Surface

Acceptable – Class 1 Process Indicator – Class 2,3

 Connector face has been chipped but dielectric between seals is intact.

 Chipping does not extend from 1 cavity to the outer diameter of any adjacent cavity.

Defect – Class 1,2,3

 Chipping of the dielectric extends from cavity to the outside diameter of any adjacent cavity.

 Crack extends from 1 cavity to another. Defect – Class 3

 Any evidence of chipping or cracks in any

contact cavity. Figure 9-17

Figure 9-20

Figure 9-42 Figure 9-43

Redline document to compare IPC/WHMA-A-620 revision B to A Red strikeout indicates deletion, blue underline indicates new words Only significant technical changes are shown

9.4.3 Connector Damage - Limits - Soft Face - Mating Surface or Rear Seal Area

Defect – Class 1,2,3

 Cut, fracture or tear is in both the dielectric face and the extends beyond cup diameter.

 Cut, fracture or tear that extends from cup through dielectric face or from 1 cup into another.