Subject: | |
From: | |
Date: | Mon, 22 Apr 1996 09:59:32 -0400 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
In a message dated 96-04-19 18:44:38 EDT, you write:
>Hello Jack - we have had good success with perimeter heating via 4
> independent nozzles on 20 and 25 mil pitch parts using nitrogen. We
> did have to do a considerable amount of process characterization for
> our pwa population but the system works well.
I've always wondered, is a 25 mil pitch part a part that is consistently made
so that 25 out of every 1,000,000 are thrown out (pitched)? It would seem to
me that you would want a lower pitch part to be more economical. I guess
that must be why the industry is going to 15 mil pitch parts - you throw out
10 less per every million!.
So smart it hurts.
|
|
|