home *** CD-ROM | disk | FTP | other *** search
- Path: erinews.ericsson.se!usenet
- From: etxzayl@cate1.ericsson.se (Johan Zeylon IN/SA/BIB)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Soldering - was Re: Battery Acid Timebomb
- Date: 5 Feb 1996 18:38:43 GMT
- Organization: Ericsson Telecom AB
- Distribution: world
- Message-ID: <4f5irk$404@erinews.ericsson.se>
- References: <2397.6603T1236T2627@galstar.com>
- Reply-To: etxzayl@cate1.ericsson.se
- NNTP-Posting-Host: dill.ericsson.se
-
- In article 6603T1236T2627@galstar.com, wizard@galstar.com (David Templeton) writes:
- >>In article <4efa0d$apr@vixen.cso.uiuc.edu> claevius@prairienet.org
- >>(Brent Busby) writes:
- >>I would think you'd want to use a high heat setting!
- >>If you solder computer components with a low watt iron, then you
- >>have to
- >>leave the tip in contact with the traces for a long time to get the
- >>solder to melt properly for a good connection, or risk a cold joint.
- >>That'll heat up the components. Using a high watt iron, you can get
- >>the solder to melt almost immediately, get a good joint, and not heat
- >>up the surrounding components.
- >> At least, that's what I've been told, and that's my experience.
- >
- >You use a low wattage iron on microelectronics for Gods sake! You
- >need to go take a class in soldering. Liquid flux is used to ensure
- >the solder heats and flows evenly. There is no substitute for proper
- >equipment and materials. If you don't have them or can't get access
- >to them take it to a shop and have it done right.
- >
-
- The important thing is the TEMPERATURE, we use 310'C for SMD devices.
- If you have a properly regulated solder iron with a relatively high
- wattage, you get the best results. The high wattage will help warm up
- the joint quickly to minimize heat spreading out to other components
- while the temperature regulation will limit the temperature to a value
- that won't harm the PCB and component you are soldering.
- The high wattage iron has a more stable temperature. Since a low wattage
- iron's temperature will drop dramatically when you begin soldering.
- The high wattage iron on the other hand will have the power to keep the
- temperature up to the regulations limit.
-
- Conclusion:
- USE A SOLDER IRON RATED AT LEAST 50W AND WITH GOOD TEMPERATURE REGULATION.
-
- We use 50W regulated to 310'C on SMD devices and 345'C on other devices.
-
- >Besides the A4000 has a multilayer board and you need flux to
- >ensure the solder flows evenly to the contacts on both sides of the
- >PCB. A high wattage iron will burn the PCB, cause the runs/tabs to
- >lift and FRY sensitive semiconductor devices.
- >
- The flux in the solder wire is enough in most cases.
- But you are right in that it might be needed in some cases like batteries.
- No frying if your iron is temperature regulated though.
-
- /Johan
-
-
-