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Chinese-made reflow soldering ovens

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  Chinese-made reflow soldering ovens "Dave M" <dgminala@mediacombb.net> - 2017-10-08 15:40 -0500
    Re: Chinese-made reflow soldering ovens pcdhobbs@gmail.com - 2017-10-08 13:45 -0700
      Re: Chinese-made reflow soldering ovens Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-10-08 23:52 +0100
      Re: Chinese-made reflow soldering ovens Don Kuenz <g@crcomp.net> - 2017-10-08 23:18 +0000
        Re: Chinese-made reflow soldering ovens Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-10-08 16:34 -0700
        Re: Chinese-made reflow soldering ovens pcdhobbs@gmail.com - 2017-10-09 13:05 -0700
      Re: Chinese-made reflow soldering ovens bitrex <bitrex@de.lete.earthlink.net> - 2017-10-09 14:00 -0400
        Re: Chinese-made reflow soldering ovens Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-09 19:06 +0000
          Re: Chinese-made reflow soldering ovens bitrex <bitrex@de.lete.earthlink.net> - 2017-10-09 15:47 -0400
          Re: Chinese-made reflow soldering ovens krw@notreal.com - 2017-10-09 21:28 -0400
            Re: Chinese-made reflow soldering ovens John Devereux <john@devereux.me.uk> - 2017-10-10 08:00 +0100
              Re: Chinese-made reflow soldering ovens krw@notreal.com - 2017-10-10 21:42 -0400
        Re: Chinese-made reflow soldering ovens Jon Elson <jmelson@wustl.edu> - 2017-10-09 14:16 -0500
        Re: Chinese-made reflow soldering ovens Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-10 11:07 +0000
          Re: Chinese-made reflow soldering ovens aioe usenet <hirni47@yahoo.com> - 2017-10-12 05:00 +0700
    Re: Chinese-made reflow soldering ovens Jeff Liebermann <jeffl@cruzio.com> - 2017-10-08 14:17 -0700
    Re: Chinese-made reflow soldering ovens Gerhard Hoffmann <gerhard@hoffmann-hochfrequenz.de> - 2017-10-08 23:26 +0200
    Re: Chinese-made reflow soldering ovens Neon John <no@never.com> - 2017-10-08 17:54 -0400
      Re: Chinese-made reflow soldering ovens bitrex <bitrex@de.lete.earthlink.net> - 2017-10-09 14:17 -0400
        Re: Chinese-made reflow soldering ovens krw@notreal.com - 2017-10-09 21:35 -0400
    Re: Chinese-made reflow soldering ovens Jeff Liebermann <jeffl@cruzio.com> - 2017-10-08 15:37 -0700
    Re: Chinese-made reflow soldering ovens John Larkin <jjlarkin@highlandtechnology.com> - 2017-10-08 15:44 -0700
      Re: Chinese-made reflow soldering ovens Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-10-08 16:01 -0700
        Re: Chinese-made reflow soldering ovens John Larkin <jjlarkin@highlandtechnology.com> - 2017-10-08 16:45 -0700
          Re: Chinese-made reflow soldering ovens Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-10-08 16:49 -0700
    Re: Chinese-made reflow soldering ovens Joe Chisolm <jchisolm6@earthlink.net> - 2017-10-09 11:41 -0500
    Re: Chinese-made reflow soldering ovens Jon Elson <jmelson@wustl.edu> - 2017-10-09 14:13 -0500
    Re: Chinese-made reflow soldering ovens speff <spehro@gmail.com> - 2017-10-12 00:32 -0700

Page 2 of 2 — ← Prev page 1 [2]

#480866

On Sun, 8 Oct 2017 15:40:58 -0500, "Dave M" <dgminala@mediacombb.net>
wrote:

>Anyone have any experience or have colleagues who have experience using the 
>Chinese-made reflow soldering ovens such as those being sold on the evil 
>auction place?  The one I've looked at is item number:262955348183 (Model 
>T962).

Original Chinese web page:
<http://www.tech168.cn/a/chanpinzhanshi/huiliuhanji/2013110256.html>
Looks like it's still in production.

T962A SMD Reflow Oven Fix/Hack
<http://www.instructables.com/id/T962A-SMD-Reflow-Oven-FixHack/>

Maintaining a list of T962/T962A problems, improvements and
suggestions how to get good results #76
<https://github.com/UnifiedEngineering/T-962-improvements/issues/76>

Modifying the T-962 Reflow Oven
<https://www.youtube.com/watch?v=0ITZXY5Mipc>

More videos:
<https://www.youtube.com/watch?v=EMwRdEi0iPg>
<https://www.youtube.com/watch?v=zj1qn476k9o>
<https://www.youtube.com/watch?v=IgPMvaY8ibQ>
<https://www.youtube.com/watch?v=JH8Qd1vv768>
<https://www.youtube.com/watch?v=cP2SYn7XFl4>


-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

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#480867

On Sun, 8 Oct 2017 15:40:58 -0500, "Dave M" <dgminala@mediacombb.net>
wrote:

>Anyone have any experience or have colleagues who have experience using the 
>Chinese-made reflow soldering ovens such as those being sold on the evil 
>auction place?  The one I've looked at is item number:262955348183 (Model 
>T962).
>
>My eyes have become the major challenge to producing the one- or two-off 
>projects, since many of the parts that are available today are only made in 
>SMD packages.   I realize that placing them onto the board still remains a 
>challenge, but at least with a proper oven, I won't have to hold a soldering 
>iron steady enough to build the boards.

My vision has always been mediocre, and it's not improving with age.
(The retina detach didn't help, either, but that's mostly fixed now.)
I got a compact Mantis on ebay and it totally changed my attitude
about SMT. I was replacing some 0603 resistors yesterday and the
optics was no problem.

https://www.dropbox.com/s/wlim2da8cv9q6fj/Bench_Mantis.jpg?raw=1

https://www.dropbox.com/s/fp88o2rqgr87g9d/Mantis2.JPG?raw=1

The imaging is startling, and there's enough working distance for
soldering or probing. Or Dremeling.

https://www.dropbox.com/s/7bihbjbaojvta0z/Z382_1.JPG?raw=1

When you can really see what you are doing, steadiness improves too.

As people have noted, a convection oven may be all you need for
reflow.


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#480869

Den mandag den 9. oktober 2017 kl. 00.44.50 UTC+2 skrev John Larkin:
> On Sun, 8 Oct 2017 15:40:58 -0500, "Dave M" <dgminala@mediacombb.net>
> wrote:
> 
> >Anyone have any experience or have colleagues who have experience using the 
> >Chinese-made reflow soldering ovens such as those being sold on the evil 
> >auction place?  The one I've looked at is item number:262955348183 (Model 
> >T962).
> >
> >My eyes have become the major challenge to producing the one- or two-off 
> >projects, since many of the parts that are available today are only made in 
> >SMD packages.   I realize that placing them onto the board still remains a 
> >challenge, but at least with a proper oven, I won't have to hold a soldering 
> >iron steady enough to build the boards.
> 
> My vision has always been mediocre, and it's not improving with age.
> (The retina detach didn't help, either, but that's mostly fixed now.)
> I got a compact Mantis on ebay and it totally changed my attitude
> about SMT. I was replacing some 0603 resistors yesterday and the
> optics was no problem.
> 
> https://www.dropbox.com/s/wlim2da8cv9q6fj/Bench_Mantis.jpg?raw=1
> 
> https://www.dropbox.com/s/fp88o2rqgr87g9d/Mantis2.JPG?raw=1
> 
> The imaging is startling, and there's enough working distance for
> soldering or probing. Or Dremeling.
> 
> https://www.dropbox.com/s/7bihbjbaojvta0z/Z382_1.JPG?raw=1
> 
> When you can really see what you are doing, steadiness improves too.
> 
> As people have noted, a convection oven may be all you need for
> reflow.

I've just done a board with four of these: http://www.my-ftm.com/wp-content/uploads/2015/11/ST_IMG1_pg8.jpg with no problems

on an old laboratory hotplate with the magnet removed

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#480881

On Sun, 8 Oct 2017 16:01:20 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>Den mandag den 9. oktober 2017 kl. 00.44.50 UTC+2 skrev John Larkin:
>> On Sun, 8 Oct 2017 15:40:58 -0500, "Dave M" <dgminala@mediacombb.net>
>> wrote:
>> 
>> >Anyone have any experience or have colleagues who have experience using the 
>> >Chinese-made reflow soldering ovens such as those being sold on the evil 
>> >auction place?  The one I've looked at is item number:262955348183 (Model 
>> >T962).
>> >
>> >My eyes have become the major challenge to producing the one- or two-off 
>> >projects, since many of the parts that are available today are only made in 
>> >SMD packages.   I realize that placing them onto the board still remains a 
>> >challenge, but at least with a proper oven, I won't have to hold a soldering 
>> >iron steady enough to build the boards.
>> 
>> My vision has always been mediocre, and it's not improving with age.
>> (The retina detach didn't help, either, but that's mostly fixed now.)
>> I got a compact Mantis on ebay and it totally changed my attitude
>> about SMT. I was replacing some 0603 resistors yesterday and the
>> optics was no problem.
>> 
>> https://www.dropbox.com/s/wlim2da8cv9q6fj/Bench_Mantis.jpg?raw=1
>> 
>> https://www.dropbox.com/s/fp88o2rqgr87g9d/Mantis2.JPG?raw=1
>> 
>> The imaging is startling, and there's enough working distance for
>> soldering or probing. Or Dremeling.
>> 
>> https://www.dropbox.com/s/7bihbjbaojvta0z/Z382_1.JPG?raw=1
>> 
>> When you can really see what you are doing, steadiness improves too.
>> 
>> As people have noted, a convection oven may be all you need for
>> reflow.
>
>I've just done a board with four of these: http://www.my-ftm.com/wp-content/uploads/2015/11/ST_IMG1_pg8.jpg with no problems
>
>on an old laboratory hotplate with the magnet removed
>
>
>
>

I assume you had a solder-paste stencil. How did you place the parts?


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#480882

Den mandag den 9. oktober 2017 kl. 01.45.17 UTC+2 skrev John Larkin:
> On Sun, 8 Oct 2017 16:01:20 -0700 (PDT), Lasse Langwadt Christensen
> <langwadt@fonz.dk> wrote:
> 
> >Den mandag den 9. oktober 2017 kl. 00.44.50 UTC+2 skrev John Larkin:
> >> On Sun, 8 Oct 2017 15:40:58 -0500, "Dave M" <dgminala@mediacombb.net>
> >> wrote:
> >> 
> >> >Anyone have any experience or have colleagues who have experience using the 
> >> >Chinese-made reflow soldering ovens such as those being sold on the evil 
> >> >auction place?  The one I've looked at is item number:262955348183 (Model 
> >> >T962).
> >> >
> >> >My eyes have become the major challenge to producing the one- or two-off 
> >> >projects, since many of the parts that are available today are only made in 
> >> >SMD packages.   I realize that placing them onto the board still remains a 
> >> >challenge, but at least with a proper oven, I won't have to hold a soldering 
> >> >iron steady enough to build the boards.
> >> 
> >> My vision has always been mediocre, and it's not improving with age.
> >> (The retina detach didn't help, either, but that's mostly fixed now.)
> >> I got a compact Mantis on ebay and it totally changed my attitude
> >> about SMT. I was replacing some 0603 resistors yesterday and the
> >> optics was no problem.
> >> 
> >> https://www.dropbox.com/s/wlim2da8cv9q6fj/Bench_Mantis.jpg?raw=1
> >> 
> >> https://www.dropbox.com/s/fp88o2rqgr87g9d/Mantis2.JPG?raw=1
> >> 
> >> The imaging is startling, and there's enough working distance for
> >> soldering or probing. Or Dremeling.
> >> 
> >> https://www.dropbox.com/s/7bihbjbaojvta0z/Z382_1.JPG?raw=1
> >> 
> >> When you can really see what you are doing, steadiness improves too.
> >> 
> >> As people have noted, a convection oven may be all you need for
> >> reflow.
> >
> >I've just done a board with four of these: http://www.my-ftm.com/wp-content/uploads/2015/11/ST_IMG1_pg8.jpg with no problems
> >
> >on an old laboratory hotplate with the magnet removed
> >
> >
> >
> >
> 
> I assume you had a solder-paste stencil. How did you place the parts?

yes I used a stencil, placed parts with tweezers

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#480927

On Sun, 08 Oct 2017 15:40:58 -0500, Dave M wrote:

> Anyone have any experience or have colleagues who have experience using the 
> Chinese-made reflow soldering ovens such as those being sold on the evil 
> auction place?  The one I've looked at is item number:262955348183 (Model 
> T962).
> 
> My eyes have become the major challenge to producing the one- or two-off 
> projects, since many of the parts that are available today are only made in 
> SMD packages.   I realize that placing them onto the board still remains a 
> challenge, but at least with a proper oven, I won't have to hold a soldering 
> iron steady enough to build the boards.
> 
> This model seems to be big enough to handle all the boards that I want to 
> make, so that is a plus.  Just wondering if this model produces good boards 
> with no unsoldered areas, damaged components, etc.  If it can consistently 
> produce good boards, I'll take a chance on one of them.  Reading the 
> Chinglish instructions is scary enough , but maybe I can figure it out well 
> enough to make it work.
> 
> Hope someone can give good advice
> 
> Dave M

I have one and it works OK.  I've done hundreds of boards through it over
the years.  The instructions are typical chopped up English but understandable 
and there are vidoes on the net you can watch.  It's bulky.  You really need about 
24in x 24 in work space with good ventlation. No problem doing 2 sided boards.

You can program custom profiles and depending on the paste my need one.  The
profiles can be hard to setup.  It does an OK job following the profile but
if you hold a temp too long (say board soak) and then try and ramp up the
hold temp will fall below at the end and then over shoot on the up hill side. Once
you get the profile set correctly it will do a OK job.


Do not expect to fill it to the edge with a board.  You will not get good soldering
at the edges if you do.  I think it's 300×320mm max but you really need to think
in the 280x300mm range max.

If you are only doing a few boards once in a while use the hotplate method.  The
T962 is big and heavy and will just be collecting dust and in the way.  But if you
have the room it will work fine for you.

Remember you are gonna need paste.  I've had good luck with these guys

http://www.chipquik.com/store/

-- 
Chisolm
Republic of Texas

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#480941

Dave M wrote:

> Anyone have any experience or have colleagues who have experience using
> the Chinese-made reflow soldering ovens such as those being sold on the
> evil
> auction place?  The one I've looked at is item number:262955348183 (Model
> T962).
> 
> My eyes have become the major challenge to producing the one- or two-off
> projects, since many of the parts that are available today are only made
> in
> SMD packages.   I realize that placing them onto the board still remains a
> challenge, but at least with a proper oven, I won't have to hold a
> soldering iron steady enough to build the boards.
I have a toaster oven converted to a reflow oven with a ramp and soak 
temperature controller.  But, for one-offs, I do not use it.

To do manual assembly by reflow, first you need to apply solder paste to the 
board, either dot by dot or with a stencil.  Then, you need to apply ALL the 
parts.  If you just TOUCH the sufrace of the board, you will knock parts out 
of alignment.  I can't imagine placing dozens of parts with tweezers without 
knocking them out of place.  I do this with my pick and place machine, but I 
just take the board off the P&P and straight into the oven, with no fiddling 
around with the board.  I really don't think this is a sane way to do SMT.

Using a good head-mounted magnifier (or better, a stereo zoom microscope!!)  
you can easily place the parts and solder.  I put a dab of solder on one pad 
of each part location, tack the part down and then solder the other lead(s).
I've been doing this for years for one-offs, it is faster than through-hole.

Jon

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#481153

On Monday, 9 October 2017 04:41:07 UTC+8, Dave M  wrote:
> Anyone have any experience or have colleagues who have experience using the 
> Chinese-made reflow soldering ovens such as those being sold on the evil 
> auction place?  The one I've looked at is item number:262955348183 (Model 
> T962).
> 
> My eyes have become the major challenge to producing the one- or two-off 
> projects, since many of the parts that are available today are only made in 
> SMD packages.   I realize that placing them onto the board still remains a 
> challenge, but at least with a proper oven, I won't have to hold a soldering 
> iron steady enough to build the boards.
> 
> This model seems to be big enough to handle all the boards that I want to 
> make, so that is a plus.  Just wondering if this model produces good boards 
> with no unsoldered areas, damaged components, etc.  If it can consistently 
> produce good boards, I'll take a chance on one of them.  Reading the 
> Chinglish instructions is scary enough , but maybe I can figure it out well 
> enough to make it work.
> 
> Hope someone can give good advice
> 
> Dave M

I have one of those cheap T962 ovens. No mods  whatsoever. It works "okay" using a lead-free curve with Sn63/37 solder if you raise the board up a bit off the tray. I run the board through 2x to get parts on both sides. 

I recently purchased a larger model conveyorized oven. They've done something weird with the thermocouples- they're sort of half grounded,  and are commoned again at the control PCB. There was a few little things wrong with it when it arrived, which I fixed. It seems to work okay from what I can tell. At least they put a cold junction compensator in there, but the electronics was designed by someone with no relevant instrumentation experience. 

--sp 

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