Bev, 

Can't claim to be sage or wise, but I can give some input.

1)  removable standoffs when soldering part or buy parts that have little v-shaped standoffs built into the body case.  Prefer "built in" standoffs.
2) mainly to allow inspectors to see the joints and make sure we did okay.

3) don't.  We make sure that purchased parts or temporary standoffs fall within the allowable height range (.5 mm to 1.27 mm) and solder away.



Eric Kalgren
BFGoodrich Aerospace
Space Flight Systems
[log in to unmask]
(505) 938-5139

>>> Bev Christian <[log in to unmask]> 7/21/2000 6:51:46 AM >>>
Here's an easy one.  Page 5-12 of IPC-A-610C shows radial PTH components
with a standoff between the component base and the board.  1) How do you all
meet this requirement?  2) What is the purpose of it? 3) How do you
inspection for it?
 My guesses:
1) lead forming, soluble plastic disks or tubing, friction fit, by chance,
don't
2) heat dissipation, inspection, strain on solder joint
3) eye, thickness gauge, don't

I await your sage comments, oh wise ones.

regards,

Bev Christian
XLTEK

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