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From [log in to unmask] Tue Jul 22 14: |
34:54 1997 |
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>From willli Mon Jul 21 12: |
27:05 1997 |
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Richard,
By far, the easiest way to get good, reliable results is to instrument a board with thermocouples and record the temperatures of the assembly as it passes through the reflow system. This way, you can know exactly what is happening when, and can make changes to the system settings if needed. If you would like to know how to mount these thermocouples and how you might go about recording the temperatures, contact me off line.
John Guy
ACI / EMPF
714 N. Senate Ave.
Indianapolis, IN 46202-3112
voice: (317) 655-EMPF ext.130
fax: (317) 655-3699
e-mail: [log in to unmask]
-----Original Message-----
From: [log in to unmask] [SMTP:[log in to unmask]]
Sent: Monday, July 21, 1997 7:24 PM
To: [log in to unmask]
Subject: Reflow oven temperature
I am more familiar with test than board manufacture and would welcome
an answer to a simple question. The quality of the connection depends
on a number of characteristics of a reflow oven - pre-heat,
temperature and time in the oven. CORRECT?
If so, is there something I can attach to boards as they go through
the system to ensure that the settings are correct for the particular
boards? I am thinking of a substance that changes characteristics,
say colour, at a rate depending on the temperature. We manufacture
small quantities but large variety and thus the settings are
potentially needing changing regularly.
I want to eliminate faults before I have to test. I would normally
ask the in-house expert but he is taking a well earned rest.
Thanks in advance.
Richard Philp,
Test Technologist
Matra BAe Dynamics
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