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April 1998

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From:
SteveZeva <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 29 Apr 1998 23:26:08 EDT
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Hi Ken!

    I've not done a formal study, but I've always recommended the number of
wave fixtures based on what kind of wave machines I have, and how many
fixtures will fit inside the machine while waving them. For instance; with a
Electrovert Ultrapak and normal sized board (not a 18" X 20" monster) I would
figure 5 in the machine, 1 being unloaded, 2 already unloaded and cooling
down, 1 getting ready to go into the machine, and 1 getting loaded up to be
put into the machine...so 10 fixtures total.

     It never made any difference what the yearly quantity was, just as long
as it was going to be an ongoing thing I would always recommend 10
fixtures...we would never be waiting on a fixture while waving that way. If
the quantity was going to be a lot more and we were using another wave
machine, I would double the quantity...this is to prevent bottle-necks...

     Now if the customer balked at paying for 10 fixtures and the quantity was
low, but ongoing, I'd let the production manager (or someone at that level)
make the call to go with less than 10...after all, it's gonna slow down the
thru-put outta wave when you hafta wait on boards to finish waving before you
get a fixture to put the next board into...

     So the short answer is, it depends on how many fixtures you can cram in
the wave...I know it's not scientific, but everytime I've had to explain why I
need 10 fixtures to a customer, they've understood...

                                -Steve Gregory-

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