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From: John Larkin on 11 May 2010 14:47
On Tue, 11 May 2010 12:18:31 -0400, Neon John <no(a)never.com> wrote:

>Time to come out of long time lurk mode.
>
>I'm doing my first foray into 0.5mm pitch surface mount with a 100 pin
>TQFP FPGA. My antique eyes and 7 power surgical stereoscope (head
>mounted) are not cutting the mustard. Therefore I'm looking for some
>recommendations on a good stereoscope for EE work.
>
>John Larkin, I think that it was you who posted a photo of your
>workstation and a description of the scope that you use but I can't
>seem to find it in the archives. Could you please re-post that info?

Compact Mantis.

ftp://jjlarkin.lmi.net/DSC01371.JPG

I too have terrible vision. This thing makes me feel like an eagle.

John


From: Neon John on 11 May 2010 15:32
On Tue, 11 May 2010 11:47:01 -0700, John Larkin
<jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:

>On Tue, 11 May 2010 12:18:31 -0400, Neon John <no(a)never.com> wrote:
>
>>Time to come out of long time lurk mode.
>>
>>I'm doing my first foray into 0.5mm pitch surface mount with a 100 pin
>>TQFP FPGA. My antique eyes and 7 power surgical stereoscope (head
>>mounted) are not cutting the mustard. Therefore I'm looking for some
>>recommendations on a good stereoscope for EE work.
>>
>>John Larkin, I think that it was you who posted a photo of your
>>workstation and a description of the scope that you use but I can't
>>seem to find it in the archives. Could you please re-post that info?
>
>Compact Mantis.
>
>ftp://jjlarkin.lmi.net/DSC01371.JPG
>
>I too have terrible vision. This thing makes me feel like an eagle.

What magnification are you using? My 7x surgical telescopes aren't
doing the job so I know that I'm going to need at least 10X and
probably more.

How is the field of view? Can you see all or most of a TQFP100
without moving the board around, for example?

Thanks,
John

From: John Larkin on 11 May 2010 15:59
On Tue, 11 May 2010 15:32:14 -0400, Neon John <no(a)never.com> wrote:

>On Tue, 11 May 2010 11:47:01 -0700, John Larkin
><jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:
>
>>On Tue, 11 May 2010 12:18:31 -0400, Neon John <no(a)never.com> wrote:
>>
>>>Time to come out of long time lurk mode.
>>>
>>>I'm doing my first foray into 0.5mm pitch surface mount with a 100 pin
>>>TQFP FPGA. My antique eyes and 7 power surgical stereoscope (head
>>>mounted) are not cutting the mustard. Therefore I'm looking for some
>>>recommendations on a good stereoscope for EE work.
>>>
>>>John Larkin, I think that it was you who posted a photo of your
>>>workstation and a description of the scope that you use but I can't
>>>seem to find it in the archives. Could you please re-post that info?
>>
>>Compact Mantis.
>>
>>ftp://jjlarkin.lmi.net/DSC01371.JPG
>>
>>I too have terrible vision. This thing makes me feel like an eagle.
>
>What magnification are you using? My 7x surgical telescopes aren't
>doing the job so I know that I'm going to need at least 10X and
>probably more.
>

I have the 4x and 6x lenses. It's about a wash. I guess 6x is better,
but has a smaller field. 6x seems enough for most electronics.

>How is the field of view? Can you see all or most of a TQFP100
>without moving the board around, for example?

Here are a few pix with the 6x lens

ftp://jjlarkin.lmi.net/Mantis1.JPG

ftp://jjlarkin.lmi.net/Mantis2.JPG

ftp://jjlarkin.lmi.net/Mantis3.JPG

I just poke a digital camera into the hood and take pics... works
fine. Real life looks better than these pix.

The cool things about the Mantis are the brilliant image, the amazing
stereo effect (move your head to look around parts) and the huge
working distance/work area. It's really easy to solder under, even for
huge boards.

Lately we make less drawings and use more photos, especially for
assembly details and ECOs.

John

From: Neon John on 11 May 2010 22:20
On Tue, 11 May 2010 12:59:54 -0700, John Larkin
<jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:


>The cool things about the Mantis are the brilliant image, the amazing
>stereo effect (move your head to look around parts) and the huge
>working distance/work area. It's really easy to solder under, even for
>huge boards.

Thanks for taking the time to write that up and make the photos. The
photos really tell the story. Now all I have to do is convince my
partner... :-)

John


From: Neon John on 11 May 2010 22:23
On Tue, 11 May 2010 17:43:41 +0100, "Nial Stewart"
<nial*REMOVE_THIS*@nialstewartdevelopments.co.uk> wrote:


>Do two opposing corner pins with a soldering iron and fine solder. Don't
>worry about shorts initially as you're just using them for mechanical
>positioning. Then do the other two rows and finally the rows with the
>first two pins. I do these by flooding the row with flux and dragging
>a solder blob down the row. This takes some practice but if I get the
>angle of attack of the iron right I can do a whole row in one pass and
>just have to tidy up a couple of pins at the end with solder wick.

Thanks. I'll have to get that technique a try once I get my new
"eyes".

John
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