DIY BGA Optical Alignment System on ACHI IR 6000

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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby Jane11 » Mon Apr 14, 2014 7:59 am

Congratulation on the improvements. Very nice.
So, are you using 12mm lens instead of 3mm?
Do you have a link for that 12mm CCD? I am thinking about buying it for my 60 mm prisms.
Do you think it will be better than using 3mm with those 60mm prisms?
Thank you for the reply
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby Jasondk2 » Mon Apr 14, 2014 11:10 am

I must say your setup looks pretty freaking awesome... I can't wait till I get stuff moving and get some of this equipment paid off so I can afford to make modifications :)

Keep up the awesome work!
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby Jane11 » Mon May 19, 2014 8:36 am

@reptooyep:
Can you please let me know how you connected the CCTV camera, you use, with the PC monitor?
What type of the adapter do you use?
Thanks
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby reptooyep » Tue May 20, 2014 8:56 pm

Hi jane11,
I use a "video to vga" adapter which i bought on aliexpress for 20$.
It has vga, cinch and svideo input and a vga out.
I inserted the board inside tha achi and you switch from the alignment to microscope camera with a button.
You can also use the vga in for a computer so that you can use one screen for everything
but i don't find it verry convenient because i need to see the balls melted.
Regards
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby Jane11 » Wed May 21, 2014 5:39 am

Thanks for the reply.
Can you please let me know the link which adaptor did you buy/use?

Why did you use CCTV camera and not a web camera( It could be a cheaper solution), I think. Did you find any advantages?

I think it is a very good idea to use a microscope camera to see how the balls are melting
but what if there are some other parts between( close to) the BGA( you are soldering) and your camera microscope?
And those parts prevent the direct /straight view( BGA <--- >microscope )? Do you have any idea for that also?
Thank you
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby reptooyep » Wed May 21, 2014 8:29 pm

Hi,
The vidéo convertor can be purchaised at this adress :
http://www.aliexpress.com/item/1pcs-AV-S-Video-RCA-Composite-Video-to-PC-Laptop-VGA-TV-Converter-adapter-box-New/1496301651.html
My first prototype was made of a webcam camera but i never get rid of the video 640*480 size limit, even with a high definition one.
The ccd modules give much better images and you can plug it directly to a LCD TV (you don't need to buy the conversion modul).
I prefer to use a computer monitor instead of a TV so that i will be able to plug a computer to my machine and switch between alignment, microscope and software with only one screen.

The good position for the microscope is hard to find because of the other parts next to the BGA (connectors and so on ..).
But you only need to see few balls so, i always find the good angle. It's a very good help and i won't turn on the machine anymore without my cam !!
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby Jane11 » Fri Jun 20, 2014 1:17 pm

Thank you for your reply.
So, I bought that Video to VGA
PICT0217.JPG

But it seems to have different connectors from Video camera.
PICT0216.JPG

Do you use any adaptors? Or how do you connect that Video to VGA device with the camera?
Besides the manufacturer says, no driver needed but not sure about that if I use Windows 7
You do not have the required permissions to view the files attached to this post.
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby code0102stinks » Fri Jun 20, 2014 3:04 pm

You need a BNC Male to RCA Male video cable like this one for an example.
http://www.ebay.com/itm/12ft-BNC-male-t ... 540b4d9b3f

The other cord should be the DC voltage into the camera. Did you get a DC power supply with camera?
If not, then you need to look at the specs of the camera and see what voltage it is supposed to be run
with. My CCTV camera uses 12vdc for power, but yours may be different.
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby Jane11 » Sat Jun 28, 2014 2:46 pm

@reptooyep:
I started to make an optical alignment system too but now I am not sure how to hold those 45° angle prisms. Can you please post few pictures of your construction how you hold those prisms together with the camera?
Thank you
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Re: DIY BGA Optical Alignment System on ACHI IR 6000

Postby reptooyep » Tue Jul 08, 2014 8:40 pm

Hi Jane11,
Sorry for my late answer ...i sometimes look to my post and it's been a long time without..
To fix my prisms together, i put some kapton tape on two unused borders so that it makes a cube.
This cube is encapsulated with the mirror into a piece of plastic cut into a plastic fence (it has exactly the size i needed).
On this piece of plastic, i glued with epoxy glue two small pieces of metal (alu) in order to fix it on a horizontal support.
For the tuning, you need to touch the horizontal alignment of this metal support because prisms cause difraction of the video beam (about 8°).
If you put the prisms perfectly horizontal, you will see the chip aligned on the pads but you will get about 5mm error !!
So, TUNING is very very very hard.
I made a better system for the horizontal translation :
Image
Image
Image
By screwing or unscrewing the for screws, you can make fine adjustments.
Regards
reptooyep
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