Homebrew PCBs

I hand solder some sioc and tssop parts.  I'd like to know a method to 
hold the part once I get it positioned so I can solder it.  Not a 
permanent method, as the may need to be removed for repair.

Phil

On Sat, 11 Jun 2005 01:31:05 +0200, Moore <prmoore@...> wrote:

> I hand solder some sioc and tssop parts.  I'd like to know a method to
> hold the part once I get it positioned so I can solder it.  Not a
> permanent method, as the may need to be removed for repair.
> Phil


someone suggested to stick some steel wire (2mm dia, 20cm long) in a piece  
of wood, and bend it around so it presses down on a point. i tried it and  
it works well. you slide the board under it and position things so that  
the tip of the wire presses onto the component.


Alternatively, you might try hot-melt glue. if you remove the part with  
hot air it might just come loose nicely.


ST

Hi Phil,

> I hand solder some sioc and tssop parts.  I'd like to know a 
> method to 
> hold the part once I get it positioned so I can solder it.  Not a 
> permanent method, as the may need to be removed for repair.

I normally tack one pin down. It doesn't need to be a particularly good
solder joint, just something that will hold it in place.

I like to paint some no-clean liquid flux over all of the pads. If you let it
dry a bit, the flux gets a bit tacky and helps to hold the part in place.

I usually put a little bubble of solder on one of the "corner" pads, position
the pin over the pad and heat it until the solder melts. Then I'll fine tune
the position, using my tweezers tnd the soldering iron until I'm happy, tack
down the opposite corner, and then properly solder all of the pins, going
back and revisiting the first two pins that were just tacked down.

--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

Hi phil

I think you can sold 2 pins at first, then the position of the chip will be fixed. for example, you can solder pin 1 and pin 8 for a soic 16 chip at first, then solder other pins.


Best Regards

Mike
High Quality PCB @ the Most Competitive Price
http://www.pcbonline.org
http://www.ezpcb.com


================

I hand solder some sioc and tssop parts.  I'd like to know a method to 
hold the part once I get it positioned so I can solder it.  Not a 
permanent method, as the may need to be removed for repair.

Phil




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===============


[Non-text portions of this message have been removed]

----- Original Message ----- 

From: "Moore" <prmoore@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, June 11, 2005 12:31 AM
Subject: [Homebrew_PCBs] SMT temporary adhesive


>I hand solder some sioc and tssop parts.  I'd like to know a method to
> hold the part once I get it positioned so I can solder it.  Not a
> permanent method, as the may need to be removed for repair.

If you are soldering manually as opposed to using solder paste, simply tack 
down a couple of leads on opposite corners then solder the remaining ones.

Leon
--
Leon Heller, G1HSM
leon.heller@...
http://www.geocities.com/leon_heller 

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