Interesting home-built TAB bonding machine

[lookimback]

Re: Interesting home-built TAB bonding machine

This tells you several ways of doing it.

[budm]

Re: Interesting home-built TAB bonding machine

Boy, it is not as simple as shown in video from Romania.

[lookimback]

Re: Interesting home-built TAB bonding machine

Definitely not. But it is absolutely doable.

[Shinju]

Re: Interesting home-built TAB bonding machine

It's a sweet project and cool machine, but let's be realistic for a second. Is it really worth the time to fix these tabs on screen like Sony and Samsung? These panels in a reseller market sell for pennies on the dollar anyway.


I am all for fixing but time is money and this looks like it would cost a customer quite a bit in labor alone.

Don't get me wrong it's bad ass and cool and support it 100% but sometimes you just gotta toss in the towel on these LCD/LED tab bond issues. And who knows how long the repAir will last let alone the other tabs that might fail next.

[lookimback]

Re: Interesting home-built TAB bonding machine

I think it's worth it if you are buying the TVs to fix and resell as I do. I've gotten over 2 dozen TVs above 40" in the past year with TAB failure. At even just $150 each, that would have been $3600.

[Shinju]

Re: Interesting home-built TAB bonding machine

I fix and resell as well, but I look at it like time vs return i also work full time and kids ect.

I think it's great and cool, but again for me it's all about time and risk of what happens if another tab fails then I have to spend more time on the same panel.

To each is their own!

[lookimback]

Re: Interesting home-built TAB bonding machine

Yeah, I see your point. If you're just doing this on the side then maybe not. This is all I do now though. Sometimes I barely get by, but it pays the bills. Something like this would help me a lot. Especially considering that a lot of newer TVs don't even have enough parts value to make them worth taking a risk on. And it looks like fun too.

[AFajitas]

Re: Interesting home-built TAB bonding machine

This is the response I got:

Hi
I use welder and weld head made in usa,if you need help you must be pay and I help you with any detail and procedure you need.cost 500$
--
Floristeanu Daniel

[zomi]

Re: Interesting home-built TAB bonding machine

Same here

And to add

4000-6000$ welder+weld head SH-New

[zomi]

Re: Interesting home-built TAB bonding machine

I think
If a machine can be soruced 2nd user at a reaosnable rate

then the rest is really trial and error
From the specs as initial values and then experimentation with the machine.
Similar to the bga rework machines...

its worth it if you have a good source of higher end panels..
that have failed.
Then its is serious money and a viable business ...

Or repairs for the end user..

But finding a machine at the sweet spot is the key
I don't think this person in the video is going to tell us anything that can't be figured from some experimentation..

I thought before feedback the person had developed a cheap method of making a diy machine..

[SteveNielsen]

Re: Interesting home-built TAB bonding machine

i thought before feedback the person had developed a cheap method of making a diy machine..

Same here.

[lookimback]

Re: Interesting home-built TAB bonding machine

We honestly don't even know it was the same panel. I didn't see anything in that video which would make me want to give him $500 for information. In all honesty, I think I could make a machine which could do this for under $1500, if I had access to a machine shop. That would include making my own custom heating elements for the head. You also need a cooling method, because you can't remove the pressure until it's cooled beyond a certain threshold. It's really not that difficult though. You need an alignment method, a USB microscope to inspect alignment, and a press mechanism with an attached head which can be heated and cooled to precise temperatures. That's not really that complicated.

[lookimback]

Re: Interesting home-built TAB bonding machine

I was incorrect about the shelf life of the tape. It's 24 months if stored at 70°F and 50% humidity. Also, bonding temps are specific to the particular tape used, so that info is available in data sheets for the tape.

[lookimback]

Re: Interesting home-built TAB bonding machine

I wonder if it would be possible to make something to do this in a handheld version? Maybe something that would clamp onto the panel for stabilization. And a thumb control to move the TAB into position, small LCD screen and USB microscope to assist in alignment, and a trigger to actuate it.

[Th3_uN1Qu3]

Re: Interesting home-built TAB bonding machine

^^ That's actually what i'm thinking as well.

[AFajitas]

Re: Interesting home-built TAB bonding machine

Even if it is less reliable than a tab bonding machine, it could still be viable. A lot of these panels are trash anyway without the proper fix.

[lookimback]

Re: Interesting home-built TAB bonding machine

Exactly. It's like, there's really nothing to lose but a little time.

[AFajitas]

Re: Interesting home-built TAB bonding machine

I wonder if you could heat up a piece of copper or aluminum and stamp it with that. Both metals cool down pretty quickly. I noticed he had some sort of cloth between the heating element and the panel in the video. Was I seeing that right?

[AFajitas]

Re: Interesting home-built TAB bonding machine

Check this out. Where a guy tried to fix a tab bond and failed. http://forum.bongofish.co.uk/index.php?topic=2257.0

[lookimback]

Re: Interesting home-built TAB bonding machine

What's important is to have even heat distribution and pressure. In a handheld device, I think an ordinary hakko soldering iron element could work. But only if you don't use more copper than you need. The entire head shouldn't be copper, because it will take too much to heat it. I'd use a ¼ square piece of copper, attached to some other material which doesn't conduct heat well. And there are ways of rapid cooling. A burst of co² or air maybe.