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September 1998

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From:
"McMonagle, Michael R." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 25 Sep 1998 08:41:27 -0500
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Steve,
        Take your 'head butter' (butthead?) out to the line and let him
see just how fast he can do hand placing with tweezers and a vacuum pen.
I had a similar instance a few years back and quickly put it to rest by
this method. We used to have to do a lot of this kind of work at a shop
I used to work for out in the Sillycone Valley, a certain customer
thought nothing of giving us 100 piece board runs with 60-70 line items
in little bags. For quoting and manpower scheduling, I have used 20
seconds for chips/SOT/MELF, 30 for SOICs and 45-60 for fine pitch based
on pitch/pin count. Though this may seem a little high, better to come
out over rather than short. As I used to have to remind our Plant
Manager, "It's a profit thing"....

Mike McMonagle
PCA Process Engineering Supervisor
K*Tec Electronics
1111 Gillingham Lane
Sugar Land, TX  77478
(281) 243-5639 Phone
(281) 243-5539 Fax
[log in to unmask]

> -----Original Message-----
> From: Stephen R. Gregory [SMTP:[log in to unmask]]
> Sent: Friday, September 25, 1998 8:08 AM
> To:   [log in to unmask]
> Subject:      [TN] : SMT Hand placing time standards...
>
> T.G.I.F. Everybody!
>
>     I was wondering if anybody has ever done any kind of time studies,
> or has
> a good figure to use to plan how long it will take to manually place a
> board?
> I know it depends on what kind of components are on the board...you
> most
> definitely can load a resistor a lot quicker than a QFP, but I've been
> "butting heads" with someone who thinks they can apply the same
> general time
> standards that you use to figure the time it would take to load
> components in
> a slide line...basically I said horse pucky, it's  a whole different
> ball
> game. You're not handling the components with tweezers in a slide
> line, and
> you don't have to worry about smearing solder paste in a slide line
> among
> other things. I said that anywhere from 75 to 125 components an hour
> isn't
> unreasonable at all...anyways, I don't want people to rush thru
> handloading a
> board. It's very easy to create enough rework
> that would negate any time you'd be saving by rushing through it.
> Any thoughts?
>
> Tia!
>
> -Steve Gregory-
>
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