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December 1999

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Subject:
From:
"Kelly M. Schriver" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 16 Dec 1999 06:29:31 -0600
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Bob -

Installation and support equipment costs?  These can run fairly high,
especially if you're installing a spray coater in an area with stringent
atmospheric discharge controls.  Don't overlook the cost of cleaning up your
compressed air supply and maintaining its purity (and dryness) at the
machine.  (Most machines will run off of dry N2 as an alternate to air.)

To keep the machine in tip top shape, the routine cleaning and maintenance
will be an ongoing cost, as well as supplies, such as kraft paper for the
conveyor, filter elements, etc.   This is true of the spray process and the
robotic curtain coating process.

The robotic systems will require a programming cost for each design you deal
with.

I have found that masking costs usually run higher than coating application
costs, so you may want to consider masking boots, etc., if this is a spray
process.

Good luck - Kelly


-----Original Message-----
From: Bob Sechriest <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Wednesday, December 15, 1999 10:52 AM
Subject: [TN] econ 101 for engineers


Need some very basic advise on cost calculations for equipment purchace

Trying to justify the purchace of a conformal coating machine for several of
our PCB assemblies. We have been performing the operation manually at a cost
of  $10 per board less than that quoted by our board builder. My estimate is
that by automating we can reduce the price per board another $2 below the
quote. So for a $50000 machine, we can recover our investment by producing
(50000/12) = 4167 boards. This gives a payback in <18months. Sounds great!
also sounds too easy. Am I missing something?

Thanks in advance!!!!!!!!!
Bob

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