DIY rework station

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DIY rework station

Postby rotek » Sun Feb 10, 2013 9:24 pm

Hello all!
I'm new here and this is my first post. Maybe this is not the best place in this forum for this thread, but admin can move it to some better place perhaps.

I'd like to share with you my latest project. I'm building my own BGA rework station. I'll copy some things from some commercial units, and some things I'll do in my own way.
I'll share some CAD drawings with you tomorrow. It will have infrared top and bottom heaters, 2 thermocouples and PC connection.
Has anyone here done something similar? I'd like to hear your opinions or suggestions.

Regards

rOtek
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DIY rework station

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Re: DIY rework station

Postby rotek » Sun Feb 10, 2013 11:09 pm

For the top heater I'll use the new 450W (80x80mm) IR heater for Scottle IR6000, and for the bottom I'm planning two 500W 120x12mm IR heaters.
I guess you'll say that those 500W bottoms might be a bit underpowered, but that's what I've already ordered. I can add some more for the bottom if needed.

cheers!
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Re: DIY rework station

Postby rotek » Mon Feb 11, 2013 12:24 am

Sorry, it's 120x120 mm....missed a key :?

bottom-heater.jpg
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Re: DIY rework station

Postby Flashing360 » Mon Feb 11, 2013 2:44 am

4 of them would be better as a lower heater, youll come up short if you try using 2.
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Re: DIY rework station

Postby rotek » Mon Feb 11, 2013 8:26 am

If I use 4 of those I'd have an 240x240mm bottom heating area. Using 2 I'll have 120x240mm area.
Here's the question, why is it important to heat a large area from the bottom when the biggest chips to desolder/reball is about 40x40mm? I'm not getting smart here, just want to know.
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Re: DIY rework station

Postby rotek » Mon Feb 11, 2013 9:06 am

So, here are a few drawings, as I promised.

ReworkStation-04.JPG

ReworkStation-03.JPG

ReworkStation-02.JPG

ReworkStation-01.JPG
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Re: DIY rework station

Postby rotek » Mon Feb 11, 2013 1:02 pm

OK, back to the drawing board then...:)
I'll order two more when the holidays in china finish.

Are the bottom heaters also controlled by profile or not?
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Re: DIY rework station

Postby rotek » Mon Feb 11, 2013 3:03 pm

I'm aware of potential problems with China, but I don't think there are such heaters available on BgaMods shop. Just checked.
Anyway, here's the updated drawing with 4 bottom heaters and total heat area of 240x240 mm.
I'll try to document as much as possible as the work progresses, and post here.

ReworkStation.JPG
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Re: DIY rework station

Postby Flashing360 » Mon Feb 11, 2013 4:03 pm

the reason a larger preheat area is needed is because the aim is to evenly preheat the whole PCB not just the BGA. if you don't preheat the whole PCB then this will cause warp.

im keeping my eye on this topic as i love DIY stations 8-)
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Re: DIY rework station

Postby rotek » Mon Feb 11, 2013 4:17 pm

@ crossleymarko: this is the completely different dimension and shape.

@ bgamods: I'm glad you have interest in diy things. In the next few days I'll send the files to laser cutting and sheet metal bending for the enclosure. After this the parts will go to powdercoating. Still haven't made my mind if it should be black or some other colour. The LCD displays will have blue backlight.
Things will get much more interesting when I come to the software. I've checked some of the commercial solutions and I'd say they are all very user unfriendly IMO. I'd like to have a user interface that would allow the user to move the points in the heating curve manually. Just point and click and move the selected point to the desired position on the graph. Also it should be possible to precisely set the parameters for each point. I hope you understand what mean.
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