Building a cheap ACF tape bonding machine

[Diah]

Re: Building a cheap ACF tape bonding machine

any bonding diy one with out Vacuum are useless to use ACF

[capwizard]

Re: Building a cheap ACF tape bonding machine

You mean use vacuum suck the screen to the work base, that is A wonderful idea, I know, because the Earth is spinning..and ..... earthquake...... .

[capwizard]

Re: Building a cheap ACF tape bonding machine

Where I can buy this X-Y micro adjustable table (I dont know the name! pic1)?

I took those pictures two months ago. I need xy table to finish this project...

PS: is 3D printer precision enough to do this job, I know nothing about machinarium.

[b25mar]

Re: Building a cheap ACF tape bonding machine

Now that ACF tape is available to buy and doesn't cost an arm and a leg (it's still pricey, but 50m of tape for $80-something sounds fair to me, considering the size of a tab), i have decided to build my own bonding machine.

The few builds i have seen use a commercial bonding head and that costs $3000 to $5000 - OUCH. I was thinking more like $50.

I have read the datasheet for the Hitachi ACF tape and it occurs to me that the requirements are not very stringent - the tape should reach 160 to 180C for 20 to 30 seconds, at a certain pressure applied by the bonding head. A suggested temperature (305C) for the bonding head is also given in the datasheet, and the only requirement for the head's shape is that it must have an even surface where it presses down on the tab (duh). There are no slopes required as it is with soldering BGAs, temperature just needs to get up there as fast as possible, stick there for 30 seconds then cool down. So the design of the control circuit is also easier.

I have already chosen my heating element (it's a surprise, you'll laugh) and completed the design of the control circuit - all that's left is making the PCB. There is no microcontroller and no firmware involved, it's all analog. The output drives a relay so any kind of heating element can be used, and the input is a normal type K thermocouple. Control is accomplished via a couple pots and switches. The circuit turns the heater completely off once the time set has elapsed, and can also run a fan if desired.

Anyone else interested?

so what did you use for the heated head? I am trying to put together a bonding machine, hungry for info.

[Th3_uN1Qu3]

Re: Building a cheap ACF tape bonding machine

Nothing for now, no time/space/life stuff got in the way. Don't know whether i will have any more time to work on this project anytime soon, but will update if i do.

[dskall]

Re: Building a cheap ACF tape bonding machine

You would think the Chinese would be selling a cheap bonding machine for like $500 by now

[ajal14]

Re: Building a cheap ACF tape bonding machine

Hi there, i am interesting in your project a home made ACF bonding machine. Did you made it, if yes can you help to make one for me?

[patmeeg44@gmail.com]

Re: Building a cheap ACF tape bonding machine

Just got a job fixing tvs again & coming across loads of bonding problems, cant afford to buy one of those fancy bonding machines but would love to make my own

[patmeeg44@gmail.com]

Re: Building a cheap ACF tape bonding machine

just wondered could you help me build one

[patmeeg44@gmail.com]

Now that ACF tape is available to buy and doesn't cost an arm and a leg (it's still pricey, but 50m of tape for $80-something sounds fair to me, considering the size of a tab), i have decided to build my own bonding machine.

The few builds i have seen use a commercial bonding head and that costs $3000 to $5000 - OUCH. I was thinking more like $50.

I have read the datasheet for the Hitachi ACF tape and it occurs to me that the requirements are not very stringent - the tape should reach 160 to 180C for 20 to 30 seconds, at a certain pressure applied by the bonding head. A suggested temperature (305C) for the bonding head is also given in the datasheet, and the only requirement for the head's shape is that it must have an even surface where it presses down on the tab (duh). There are no slopes required as it is with soldering BGAs, temperature just needs to get up there as fast as possible, stick there for 30 seconds then cool down. So the design of the control circuit is also easier.

I have already chosen my heating element (it's a surprise, you'll laugh) and completed the design of the control circuit - all that's left is making the PCB. There is no microcontroller and no firmware involved, it's all analog. The output drives a relay so any kind of heating element can be used, and the input is a normal type K thermocouple. Control is accomplished via a couple pots and switches. The circuit turns the heater completely off once the time set has elapsed, and can also run a fan if desired.

Anyone else interested?

Very interested in your project, I have just got a new job fixing TV's again after many years, I have not got the money to buy one of these fancy bonding machines. I would appreciate your help in making my own. (I hope this is not too much to ask) Just to add, I am based in Manchester UK.

Regards
Patrick

[angelos]

Re: Building a cheap ACF tape bonding machine

Just for your information. Here in South Africa there was a guy that imported one of these bonding machines from China. Upon arrival at customs the unit was sent back to China. The reason being that Samsung Electronics have arranged an agreement with the government to block these machines so as to protect the jobs of the locals that are assembling TV's here in South Africa. Nice hey.

[Th3_uN1Qu3]

Re: Building a cheap ACF tape bonding machine

Very interested in your project, I have just got a new job fixing TV's again after many years, I have not got the money to buy one of these fancy bonding machines. I would appreciate your help in making my own. (I hope this is not too much to ask) Just to add, I am based in Manchester UK.

Regards
Patrick

Sadly, this never took off due to the lack of time, maybe, just maybe, i'll get back into it this year.

Sad to hear about that deal in South Africa. Big manufacturers are determined to screw us over.