When I was fully involved with wave machines out in the field and didn't
have or had forgotten the right gear I used to think kitchen! (the
temperatures are similar at least so far as roasting/baking are concerned
and there is always a hardware shop or department store nearby)
So....
If you really need to get it out without letting it solidify have you tried
a turkey or meat baster? The sort which is a big rubber bulb on the end of a
tube. Or [next shelf along] just acquire and beat up a large ladle to have a
straight side and crank the handle as required. Use it to sweep in solder
against the pot wall. And.... heat proof oven gloves, baking tins make
moulds and so on.....
Regards
Mike
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Wednesday, February 20, 2008 6:42 PM
To: [log in to unmask]
Subject: Re: [TN] Solder Temperature...
Once you get down to the last little bit you can let it cool and just lift
it out, it does not usually stick. You always have at least a small layer of
dry dross/oxides/slag on the bottom.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Wednesday, February 20, 2008 11:54 AM
To: [log in to unmask]
Subject: Re: [TN] Solder Temperature...
Hey Steve,
That looks cool. Too bad they aren't gold.
So how do you get the last few pounds out that are at the bottom of the pot?
I haven't seen anything that could suck up the solder without being melted
or destroyed by the molten solder.
Phil
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, February 20, 2008 12:34 PM
To: [log in to unmask]
Subject: Re: [TN] Solder Temperature...
Hi Richard!
I'm emptying the pots because we're getting a new wave (a Soltec Delta-5),
and I'm going to use the solder in the pots we have to help fill the pots in
the new one.
I've finished the SN96 pot, and getting ready to do the HMP. Want to see
about $13,000 worth of solder? Check this out:
http://stevezeva.homestead.com/files/1_down_2_to_go.jpg
SN96 bar solder is going for $19.95 a pound today!
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Wednesday, February 20, 2008 9:35 AM
To: [log in to unmask]
Subject: Re: [TN] Solder Temperature...
Hi, Steve and Brian.
Interesting you should bring this up today....
Last week I was called to a client as they were having bigtime defects with
their wave solder process. Their wave solder machine had not been properly
maintained, with flux and solder splashed all over the preheaters, solder
splashes jamming the conveyor chains, no recent solder analysis, and no pot
maintenance performed whatsoever in at least
3 years. As a result, there was a huge amount of lead-clipping clusters,
dross clusters, and flux buildup inside the pot and the pumps and impellers.
As I performed the maintenance over the weekend, I kept an eye on the pot
temp, as I did not want to burn out the heaters. I also noticed the gold
sheen as the temp rose to 550 F, before I shut it off to protect the heaters
and quickly get the remaining solder out and cleaned the pumps, etc. I left
those last 30 or so "bullion bars" off to one side, refilled the pots with
little nuggets (Tip: I used your tip of the Baker's Secret loaf pans, but I
also purchased a single Baker's Secret miniature muffin pan and used that to
pour nuggets to line the bottom of the pot, rather than have to cut bar
solder). I refilled with about 200 lbs of new solder, then used the "good"
loaves removed at a temp of 470 F, and then topped off with about 10 loaves
(400 lbs) removed at 550 F.
Result: the owner came in and thought I had purchased and installed a brand
new wave solder machine. They got a perfect solder analysis, and first three
jobs of a total of 180 fairly complex through-hole cards were run. There
were no solder defects. Zero. So I don't think the alloy was degraded, but
that is still a question in my mind.....
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, February 20, 2008 8:51 AM
To: [log in to unmask]
Subject: [TN] Solder Temperature...
Mornin' All!
If the solder in a wave solder pot gets a little hot, it doesn't really
degrade it does it?
Situation is; I'm emptying three solder pots, one 63/37 pot, one SN96 pot,
and one HMP pot, the way the pots are designed is that the pot thermocouples
are located up towards the top of the pot. So as I lower the level of the
solder in the pot, at some point the thermocouples will not be in direct
contact with the solder and thus not be giving me the actual solder
temperature.
I've been cycling the heater power off when it looks like the solder is
getting pretty hot (it starts getting getting this golden sheen to it),
along with disconnecting the heaters when they start getting exposed as the
solder level goes down.
I've always emptied pots this way, and just started wondering if the solder
degrades at all if you heat it up beyond the liquidous temperature. I know
it makes a little more dross as the temperature rises...
Steve
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