Previous: Bias connector extractor   |   Index   |   Next: Wedge testing



Internal bias cables


Looking at the top of station1. The cables 1-4 go to the first ROC board, the next 4 to the next ROC. At this end, cables 1 and 3 are shorter than cables 2 and 4 by 19 mm, and the distance from the center of the HV connector to the extension cable end is 14.5 mm.

In this view:
     cable type
  -------------
  1    2B  3204
  2    1B  3203
  3    2A  3202
  4    1A  3201
Assume the bias cables follow the same path as the extension cables. Note that bias cable 2 follows the straight extension cable that is highlighted, so we can use it's length for part of the bias cable path. This is cable 111-PHX-02-3201.PDF, length 280.3 mm. On the HDI end, the distance from the center of the HV connector to the end of the cable is 14.5 mm.
On the ROC end, the distance from the cable end to the bias connectors is AB minus the distance from the connector's center to the cable end, which is 193-8.7 = 184.3 mm.
      280.3    cable length
      -14.4    Hirose to cable end at HDI
      193.0    A-B on ROC board
       -8.7    half connector
     ------
      450.2 mm
This the connecter-center to connector-center length.


Take the cable lengths from the mechanical drawings on this page. The cable length in the table below is the length of each cable measured along the centerline of the cable. The ROC distance is measured on Fig.3 above. Totals are cable - 14.5 + ROC -8.7.

station ID cable length ROC total rounded up
station 1 3201 280.3 193 431 455
3202 297.4 450 455
3203 279.5 431 455
3204 299.9 455 455
station 2 3301 183.1 168 328 335
3302 170.8 316 335
3303 187.1 332 335
3304 174.8 320 335
station 3 3401 150.5 144 271 280
3402 139.9 261 280
3403 154.8 276 280
3404 144.2 265 280
station 4 3501 123.5 118 218 225
3502 123.2 218 225
3503 127.4 222 225
3504 123.6 218 225


These are E.FL connectors from Hirose.




6 April 2011:
Constructing a cable in SolidWorks gives the following result:



Hubert van Hecke
Last modified: Thu Apr 7 09:42:52 MDT 2011