Part 5:
The nudge test will be your best friend here too. No matter what your thermocouples say, unless the solder has melted under the chip, you have not reached 217 (lead free) or 183 (leaded) under the chip.
The nudge should be more of a slight/push down on the chip to see if the solder is melting/melted. After you see movement, give it another few seconds (6, 8 , no more than 10) before you move your nozzle out of the way and pick the chip with the vacuum pen.
With a great deal of practice, you will be able to tell by the sound/feel when the solder...
Near123
New Member
Last Activity: 07-07-2015, 01:33 AM
Joined: 10-23-2014
Location: Brooklyn, NY
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Part 4:
the temperature of the griddle.
I would STRONGLY advise that you just abandon the griddle if you have the funds to purchase a proper lower heater (the T8280 is not a premium device, but at 1600 watts, it is much better than the griddle, especially if you can pick one up for $100).
Even with a holding device, you need to have a proper nozzle to match the size of the chip that your are heating as well. The nozzle needs to be placed fairly close to the chip so the hot air completely saturates the chip (you will have to find a sweet-spot for your... -
Part 3:
and you will have to rethread it before you can operate the griddle again.
The controller holds contact points together until the set temp is reached, and then a bi-metal in the temp probe causes the contacts to open/current flow to be cutoff to the heating elements.
My advice is to abandon the griddle if you have ANY doubts about your ability to successfully modify/operate it safely, as there is a significant amount of risk involved if you don't pay VERY close attention to the griddle as you operate it/after you modify it.
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Part 2:
IF, IF, IF you do this, you take ALL responsibility and ALL risk, but.. you can disassemble the controller, locate the stop tab, and bend it so that it no longer stops at 400, but goes past that. You NEVER want to go more than 500 degrees, and you will have to guesstimate that.
I put a scribe mark on mine, and I start out by setting the griddle to the max (400) letting the motherboard temp stabilize at the max it will reach at that setting, and then take the temp up another 50 degrees (compare the scale and turn the knob up the same amount). I let it stabilize... -
Hey.. this will be in chunks, due to the 1000 char limit.
Part 1
Hey...
We all have to start somewhere, and you can gain valuable knowledge with what (equipment) you have, just don't set your expectations too high.
I have several thousands of $ invested in equipment, but I started out using equipment very similar to what you are using. (as a matter of fact, I still have it, and use it on occasion for smaller boards, salvaging chips from scrap boards, etc.).
You CAN modify that Presto griddle to get more heat out of it..... -
Re: BGA Reballing Help Needed Please All Pro's Come
I have seen people use Hot air station's for reballing. I actually want to succeed with hot air before i even think about spending big money on better equipment. For right now the only thing i want to change from the setup is the griddle. Btw a griddle is something you cook pancakes on
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Last edited by Near123; 10-24-2014, 12:36 PM. -
Re: BGA Reballing Help Needed Please All Pro's Come
Wow thank you so much for the reply.
I was coming to the same conclusion about not having enough bottom heat. The griddle is only good for about 120c that only when i have it closest to the griddle.
As for all the items i am using during the process of lifting the chip.
1. kingbo flux
2. Suction pen (sorry i think thats what it called.)
3. a home made hot air wand holder
4. $20 thermocouple from amazon
5. bought a hot air station from ebay says 852D+ (but...Leave a comment:
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BGA Reballing Help Needed Please All Pro's Come
Hello Badcaps,
I have been trying to reball an Xbox 360 motherboard that i am having problems with.
Here is what i use
My bottom heater is a Griddle (i know it's getto it can get about 120c for bottom heat )
I have a proper hot air station as my top heater.
Also i sit right behind a window fan to exhaust all the fumes.
Now here is the Problem : Every time i try to lift the chip it fails. Let me explain I heat the board. I can only heat the chip to around 227c but anything above that will kill the chip. But for some reason... -
Re: New Members - please post your introductions here
Hello, Hamza Imran here. I wanted to register to the forum and learn from the pro's about BGA reballing.Leave a comment:
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