Hi Bob:
I don't think it's so much the stereo microscope as the related equipment. I have a Bausch & Lomb StereoZoom 4 and the
dial is always at the lowest setting (0.7dial * 10X objective = 7 power).
For another reason I got a Nikon SMZ-U microscope and discovered that it's so
tall that it can not be used for SMT work.
http://www.prc68.com/I/NikonSMZ-U.html
So an important parameter is is length from the eyepiece to the objective. If that get to be long then you can not
easily use it.
Using an arm type support is very desirable. These have a heavy metal base with an horizontal arm. You can swing the
arm over whatever you're working one and easily move the scope up or down as needed.
This all done while in a standard chair on a work bench/table.
Although an old fashioned illuminator will work, see top photo:
http://www.prc68.com/I/SMT.shtml#Mag
A ring light is much more convenient (scroll down a little).
Also the soldering iron tip to grip distance should be as short as you can get. (1.5" = burned fingers, 0.5" should be
better)
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
-------- Original Message --------
What are the important parameters regarding purchase of a stereo microscope? I
see some on ebay for around $50; are those good?
Bob
On Thursday, August 11, 2016 10:00 AM, Didier Juges <shali...@gmail.com>
wrote:
I concur. I have been using ExpressPCB extensively over the last 2 years
with great satisfaction now that it is possible to get Gerber files from
them.
I typically use the mini board pro service (3 bare boards, 2 sided with
solder mask and silk screen) for prototypes and then buy the Gerbers to
have production quantities done overseas.
The boards are of high quality and the service is very fast at a very
reasonable price.
The only gotcha with regard to Gerber files is that you can only buy
Gerbers for boards that you have actually bought from them, so the process
is to buy the prototypes, then if you are happy with those, buy the Gerbers
for that design.
Didier KO4BB
On Tue, Aug 9, 2016 at 3:06 PM, Brooke Clarke <bro...@pacific.net> wrote:
Hi:
I've had good luck using any of the the ExpressPCB services that include
solder mask with surface mount parts where the pitch is 0.05" (half normal
DIP) and hand soldering (requires stereo microscope).
http://www.prc68.com/I/BTSG.shtml (battery top signal generator)
http://www.prc68.com/I/Images/ICS525v1o.jpg
http://www.prc68.com/I/SMT.shtml <http://www.prc68.com/I/SMT.shtml>
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
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