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April 2006

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Subject:
From:
Jeff Brown <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jeff Brown <[log in to unmask]>
Date:
Wed, 19 Apr 2006 10:46:43 +1000
Content-Type:
text/plain
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text/plain (286 lines)
Hi all,

I have had good results with another brand of VP oven - but I'm not
supposed to name names here am I...?

The reason that you won't find fluids much higher than 260 degrees is
that the fluoro polymer breaks down at 300 degrees to produce
hydrofluoric acid, which is really nasty stuff. Below this temperature
it is claimed to be quite safe.  Very good reason for operators to avoid
getting the fluid on their hands and then smoking - they end up
breathing the HF straight in!  Not nice.

Regards,
Jeff Brown

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jason Gregory
Sent: Wednesday, 12 April 2006 4:46 AM
To: [log in to unmask]
Subject: Re: [TN] RD Technologies Vapor Phase Users

 Honestly,

I've never had to clean the preheat section. However, the vapor chamber
is
where I've spent most of my time. You'll get flux residue on the walls,
and
a nice green "algae-ish" stuff on the cooling coils. And you're right,
it is
NOT fun to clean. I wouldn't try the Easy-Off either, it just makes more
of
a mess than anything. I definitely clean more often then 200 hours.

I would imagine the 230 fluid you have is for 63/37 soldering.

BTW, I tried looking fluid that went higher than 260 (for HMP paste). I
couldn't find any.


Jason Gregory
Manufacturing Engineer
Innova Electronics
(281)653-5593
(281)653-5594 fax
(281)594-0602 cell
[log in to unmask]

-----Original Message-----
From: Steve Gregory [mailto:[log in to unmask]]
Sent: Tuesday, April 11, 2006 1:19 PM
To: TechNet E-Mail Forum; Jason Gregory
Subject: RE: [TN] RD Technologies Vapor Phase Users

Hi Jason!

We have some of the same fluid as you, although we have some LS-230 too
(not
quite sure why that fluid is there...need to ask some questions about
that.

I read the manual and it said the vapor chamber should be cleaned every
200
hours of operation, is that what you've found too? Or should it be
cleaned
more (or less) often? Also, is the vapor chamber what gets most dirty?
Or
does the area around the preheat panels get dirty too?

Looking at the machine, I can see that it is going to be a pain to clean
everything down inside the vapor chamber as they state in the manual.

Kind regards,

-Steve Gregory-
Senior Production Engineer
OAI Electronics
6960 East 12th Street
Tulsa, Oklahoma 74112

(918) 836-0507
(918) 706-2779 CELL
(918) 836-0184 FAX

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jason Gregory
Sent: Tuesday, April 11, 2006 12:38 PM
To: [log in to unmask]
Subject: Re: [TN] RD Technologies Vapor Phase Users

Hi Ramon,

Pros:
-Ability to process problematic high temp boards (thicker than .063",
high
layer counts, etc.) and not have to jack with as many variables as in
convection or IR -Excellent thermal equilibrium across the assembly and
not
having to worry about shadowing or thermal thieving -Probing your board
to
determine preheat and then knowing your peak area's temp already and
looking
through a little window to observe reflow and giving an extra 15 or 20
seconds over for wetting

Cons:
-Fluid is expensive and if you have excess dragout, you will notice
financially. Fluid is about $1000/gallon -Higher than usual expectations
for
tombstoning if your board design is a little lopsided (heavy ground
planes
connected to one side of passives) or if your process is a little off.
-Machine is a booger to clean


Jason Gregory
Manufacturing Engineer
Innova Electronics
(281)653-5593
(281)653-5594 fax
(281)594-0602 cell
[log in to unmask]

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dehoyos, Ramon
Sent: Tuesday, April 11, 2006 11:36 AM
To: [log in to unmask]
Subject: Re: [TN] RD Technologies Vapor Phase Users

        Hi Jason:
                   I believe that Vapor phase has a lot of good merits.
Could you share your experience with the machine? Pros and Cons.
        Regards,
        Ramon


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jason Gregory
Sent: Tuesday, April 11, 2006 12:13 PM
To: [log in to unmask]
Subject: Re: [TN] RD Technologies Vapor Phase Users

Hello Steve,

We have a RD here and we use Galden HS-260


Jason Gregory
Manufacturing Engineer
Innova Electronics
(281)653-5593
(281)653-5594 fax
(281)594-0602 cell
[log in to unmask]

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, April 11, 2006 10:33 AM
To: [log in to unmask]
Subject: [TN] RD Technologies Vapor Phase Users

Mornin' All!

I've just got the opportunity to work with a new vapor phase reflow
system
here at my new position. It's a RD Technologies RD3 with a vapor
recovery
system. We're in the process of hooking it up, we haven't yet started it
up.

I worked with a vapor phase many years ago (1988), and this system is
much
nicer than what I remember about the system I worked with in the past.

I was wondering if there are any RD Technologies users out there that
have
any "words of wisdom" that they might share with me about the system I'm
that going to be working with. BTW, we're going to using Galden heat
transfer fluids.

Kind regards,

-Steve Gregory-
Senior Production Engineer
OAI Electronics
6960 East 12th Street
Tulsa, Oklahoma 74112

(918) 836-0507
(918) 706-2779 CELL
(918) 836-0184 FAX

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