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> Score: Weller Pyropen, Working or defective?
JoOngle
Posted: August 12, 2010 06:46 pm
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This little baby scared the bajezus outta me today, I swapped it for a bunch of Magic-Eye tubes with a guy, looked unused, until I managed to turn the entire metal-solder-head BLUE from instant overheating (at the lowest setting) and then the entire thing blazed flames out of both the (closed) ignition holes AND the Airing holes....WOAH...scary stuff.

Later...I managed to get it working, but it gets hot fast, so hot that the entire metal head glows faint red, and you can use the entire tip + then some, to melt solder....after a minute? Normal? Or is something wrong?

http://www.youtube.com/watch?v=0nW8H-OvuIE



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CWB
Posted: August 13, 2010 01:18 am
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you may have had some crud in the barrel/mixing chamber that caused the gas to spew out the air intake holes .
a good sign is that when you tipped it down it did not flare up .

the barrel should get hot .
but something tells me that the thing has a little problem ...
make another running live video and do the fire-up sequence plus cranking it up one notch at a time .
this will determine if the gas flow is just too darn high .
it may flare up on you .

if there is a problem , i would get a hold of the guy you traded with . dry.gif


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Sch3mat1c
Posted: August 13, 2010 02:05 am
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Hey, ya shaved! smile.gif

That thing is as noisy as my propane torch on the lowest setting... and it's 3/4" across! Don't suppose it's got the wrong orifice in it, or the wrong fuel perhaps? Liquid butane is something like 30PSI at room temperature, whereas propane is closer to 100PSI. That would definitely change the flow rate.

Tim


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kl27x
Posted: August 13, 2010 05:07 am
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The part that glows red is the catalyst mesh inside. It breaks down the butane, creating heat. Once it's up to temp, the flame goes out and it takes over. It's normal for it to glow red when it's working correctly.

I wouldn't be surprised if the minimum temp of the catalyst effectively limits the lowest setting on these things, because the cheap Ratshack one I tried was also a scorcher. The tip burned away with less than an hour on-time. My suggestion is to see if they sell any aftermarket tips and buy the biggest one available.
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CWB
Posted: August 13, 2010 09:32 am
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yeah man ...
my old "pyro pen" (it was orange with the built in flint spark wheel ignition) ran on the toasty side . i don't believe it was a weller product though ... i think it was a european make .
it would eat tips pretty quick .
on the other hand it did come up to temp very quickly . i could prepare some stuff to be soldered (wires , rf connectors up on a tower , etc) , fire up the pen and solder away then shut it down .


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tekwiz
Posted: August 13, 2010 05:43 pm
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I've got the exact same unit. That little slide lever has to always be in the up position. Try it without the solder tip first. It should produce a nice little torch flame. If not, then there is crud in the mixing chamber. A good blow job with compressed air into the air intake holes will likely cure it.
When you first start it, both on/off & flame control levers must be full on...all the way to the right.
Once you are sure the flame is working correctly, then try the solder tip.

I use mine all the time for component salvage. They are a nice, well made tool. Mine is over 30 years old & still working perfectly. I inherited it from my father. Too bad he lost all of the tips for it, so I can only use it as a torch. I really like the large fuel capacity.

I even use it to silver braze my bandsaw blades.

@CWB: I think the orange solder pen you refer to is the original Portasol. I have one of those too, that I got for my 18th birthday. It still works perfectly & has the original tip. Another well made tool.


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Fallingwater
Posted: August 13, 2010 06:36 pm
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QUOTE (tekwiz @ August 13, 2010 05:43 pm)
A good blow job with compressed air into the air intake holes will likely cure it.

This made me laugh a bit laugh.gif we're all children inside tongue.gif


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tekwiz
Posted: August 13, 2010 07:26 pm
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QUOTE (Fallingwater @ August 13, 2010 09:36 am)
QUOTE (tekwiz @ August 13, 2010 05:43 pm)
A good blow job with compressed air into the air intake holes will likely cure it.

This made me laugh a bit laugh.gif we're all children inside tongue.gif

You got that right. I've been tit happy for 52 years now. baby.gif
I feel that humor is in very short supply in this world, & the supply should be increased wherever possible.
It's the little unexpected laughs that count the most. cool.gif


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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CWB
Posted: August 13, 2010 11:07 pm
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eric , i think you're right ... portasol does ring a bell .

so , how many psi would that blow job be ?
ya don't wanna mess up the infernal working parts !


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tekwiz
Posted: August 14, 2010 07:36 pm
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QUOTE (CWB @ August 13, 2010 02:07 pm)
eric , i think you're right ... portasol does ring a bell .

so , how many psi would that blow job be ?
ya don't wanna mess up the infernal working parts !

This should be kept to 30PSI, or care must be taken not to actually pressurize the mixing chamber. Otherwise you may end up forcing air into the butane reservoir. Butane has a low vapor pressure...~30PSI @ room temp.
Not much pressure is required, as the usual problem is a tiny dust bunny interfering with the butane jet in the mixing chamber. If something gets in the way of the jet, it causes it to splash out through the air intakes.


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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CWB
Posted: August 14, 2010 09:45 pm
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not exactly the response i expected ... blink.gif
laugh.gif tongue.gif


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tekwiz
Posted: August 15, 2010 07:15 pm
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QUOTE (CWB @ August 14, 2010 12:45 pm)
not exactly the response i expected ...  blink.gif
laugh.gif  tongue.gif

O well, I'm getting old...what can I say? laugh.gif

Besides, BJs aren't measured in PSI anyway, they're measured in PLI. wink.gif


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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