[Robotgroup] advice needed: soldering Piezo disks

[Andre Lamothe]

Another way to connect things for example when trying to solder to batteries 
etc. is to weld the connections. You build a high voltage source and then 
discharge it across the leads. I have used it for battery connections 
before, kinda cool. For example, here's a company that makes little hobby 
welders. But, a good technique to use when you just cant solder something.

http://www.hobbyspotwelders.com/HSBATTERYPEN.php

http://www.hobbyspotwelders.com/basics.php

This wouldn't work in your case unless you wanted to weld the brass parts, 
but its definitely worth storing in your mental ram for a rainy day.

Andre'

----- Original Message ----- 
From: "Def Egge" <robodigest at innervate.com>
To: "The Robot Group Mailing List" <robotgroup at puremagic.com>
Sent: Saturday, November 17, 2007 1:30 PM
Subject: Re: [Robotgroup] advice needed: soldering Piezo disks


At 00:05  2007-11-17, you wrote:
-=-=-=-=-= begin quoted message =-=-=-=-=-

 >Hmmm, in general, you want to do it quickly and get the solder
to >flow fast, so tin the lead itself, put some flux on the surface
and >then wet the solder tip with solder and then solder it down
dead >center. That usually works pretty well.
 >
 >Andre'
 >
 >----- Original Message -----
 >From: "Def Egge" <robodigest at innervate.com>
 >To: "The Robot Group" <robotgroup at puremagic.com>
 >Sent: Friday, November 16, 2007 6:43 PM
 >Subject: [Robotgroup] advice needed: soldering Piezo disks
 >
 >
 >
 >Has anyone had experience in soldering leads to piezo elements
 >(crystal layer with brass backing)?
 >
 >Soldering a lead to the brass seems pretty straightforward.  Any
tips
 >on soldering the other lead to the piezo crystal layer itself?  The
 >crystal layer appears to be epoxied to the brass backing
plate.  How
 >likely is that to be damaged?
 >
 >I have examined pre-soldered piezo elements but I cannot tell what
 >preparation was made to the crystal layer before soldering the lead
 >to it.
 >
 >Thanks for any tips y'all might offer.
 >
 >
 >--
 >
 >All the best....
 >
 >Mike
 >
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 >Robotgroup at puremagic.com
 >http://lists.puremagic.com/cgi-bin/mailman/listinfo/robotgroup
 >
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-=-=-=-=-= end quoted message =-=-=-=-=-

Sounds like the advice I got years ago when learning to solder ...
work hot, work fast, use flux.

Thanks, Andre'!


-- 

All the best....

Mike

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