slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Pin receptacle press-fitted to IU test pcb . ( Partnumber detail on next page.) PowerPoint Presentation
Download Presentation
Pin receptacle press-fitted to IU test pcb . ( Partnumber detail on next page.)

Loading in 2 Seconds...

play fullscreen
1 / 6

Pin receptacle press-fitted to IU test pcb . ( Partnumber detail on next page.) - PowerPoint PPT Presentation


  • 99 Views
  • Uploaded on

Pin receptacle press-fitted to IU test pcb . ( Partnumber detail on next page.). rear side w/ PMT inserted Note: This will not be visible on actual front PCB, it is buried in a blind hole. front side. Details of contact geometry. Cutaway view. (Necessary to solder body to a copper board

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Pin receptacle press-fitted to IU test pcb . ( Partnumber detail on next page.)' - willis


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Pin receptacle press-fitted to IU test pcb.

(Partnumber detail on next page.)

rear side w/ PMT inserted

Note: This will not be visible on actual front PCB, it is buried in a blind hole.

front side

slide2

Details of contact geometry.

Cutaway view.

(Necessary to solder body to a copper board

for fixturing for cutaway. Ignore this!)

measured 0.090 inch

slide3

Contact with typical MCP-PMT pin inserted.

ABSOLUTE MIN

design insertion depth

0.100 inch

first touch 0.068 inch

(at this point of pin insertion, the contact beams are first observed to deflect)

slide4

Remarks:

  • Necessarily, the minimum design insertion depth is a judgement call.
  • If you ask the receptacle manufacturer, the answer will be larger still.
  • Someone has to make this judgement and be responsible for the consequences.
  • If you ask me, 0.100 inch (2.54 mm) is acceptable, based on my observations of the cutaway pin. A bit more would be better.
  • Lastly, please note that we are talking about the minimum design insertion depth, after all tolerances are taken into account.
slide5

From the above work, we set the position of PMT face with respect to the top surface

of the front board 14.200 BASIC, as shown below.

slide6

And then the maximum allowable extent of the potting, measured from face of PMT, is simply defined by the need to not interfere with the pin receptacles or the front board.

  • A simple value of 13.489 mm maximum is acceptable (call it 13.45 mm for sanity).
  • Compare this to the HPK drawing, 13.80 mm. A change is necessary.