Greetings All

You may recall I wrote earlier about trying to bend some 48" long x
2" wide x 0.06" thick aluminum, and how it nearly destroyed my brake..

Well, I finally conceded to being unable to bend it, and instead
sheared it into 1" wide by 48" long strips, then jigged it up and tack
welded the inside corners.

Anyway, here's some pictures of the finished project, a 6" F/7
Dobsonian telescope I built for my Father:

http://lerch.no-ip.com/atm/Projects/...pe/page_01.htm

BTW, I LOVE my Miller 180SD Tig welder and the Auto Darkening welding
helmet from Horrible Freight! So far, I've only found two faults
with the welding helmet:

#1 The already mentioned "Nose Print" (which isn't a problem, as my
nose normally occupies that space anyway)

#2 Something that is probably common to most auto darkening helmets.
When welding in strange positions (like trying to weld the alt/az base
assembly) Getting your head to a spot where you can see the weld, can
result in a shadow being cast on the sensor that triggers the auto
darkening. The result is a couple of times, If I didn't get my head
in the right position, the helmet didn't darken when I struck an arc.
My eyeballs don's seem any worse for wear, and I can only hope that
the UV and IR filter's are a permanently "On", but it did get my
attention a few times..


Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction, Testing, and Coating site)

Press on: nothing in the world can take the place of perseverance.
Talent will not; nothing is more common than unsuccessful men with talent.
Genius will not; unrewarded genius is almost a proverb.
Education will not; the world is full of educated derelicts.
Persistence and determination alone are omnipotent.
Calvin Coolidge

Anyway, here's some pictures of the finished project, a 6" F/7
Dobsonian telescope I built for my Father:

http://lerch.no-ip.com/atm/Projects/...pe/page_01.htm


May I make a friendly suggestion that you delete the duplicate pictures that
all show the same thing and then only do two-up rather than the three you
now have? Your pages can't fit on my laptop's display.

Also, if the HF helmet has a sensitivity setting, turn it all the way up
when TIG welding.

James Lerch wrote:
snip
in the right position, the helmet didn't darken when I struck an arc.
My eyeballs don's seem any worse for wear, and I can only hope that
the UV and IR filter's are a permanently "On", but it did get my
attention a few times..

They are.

James Lerch wrote:

#2 Something that is probably common to most auto darkening helmets.
When welding in strange positions (like trying to weld the alt/az base
assembly) Getting your head to a spot where you can see the weld, can
result in a shadow being cast on the sensor that triggers the auto
darkening.
Mine has two sensors about as far apart as possible just above the
window. I've never seen the arc flash. Also, it seems to pick up the
HF and go to a half-dark state as soon as the HF comes on. This is
sometimes annoying, as it may get dark enough that I lose track of the
workpiece before I can get the arc started. That's generally only a
problem with micro-welding something that's only an eigth of an inch
across.

Jon

I see why your brake BROKE. Look in pic DSC07599.jpg

THERE is your culprit

On Sun, 09 Jan 2005 18:42:16 GMT,
(James Lerch) wrote:

Greetings All

You may recall I wrote earlier about trying to bend some 48" long x
2" wide x 0.06" thick aluminum, and how it nearly destroyed my brake..



----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---

Interesting! Any problems with internal reflections from the flat parts
inside the tube?

Steve R.


"James Lerch" wrote in message
...
Greetings All

You may recall I wrote earlier about trying to bend some 48" long x
2" wide x 0.06" thick aluminum, and how it nearly destroyed my brake..

Well, I finally conceded to being unable to bend it, and instead
sheared it into 1" wide by 48" long strips, then jigged it up and tack
welded the inside corners.

Anyway, here's some pictures of the finished project, a 6" F/7
Dobsonian telescope I built for my Father:

http://lerch.no-ip.com/atm/Projects/...pe/page_01.htm

BTW, I LOVE my Miller 180SD Tig welder and the Auto Darkening welding
helmet from Horrible Freight! So far, I've only found two faults
with the welding helmet:

#1 The already mentioned "Nose Print" (which isn't a problem, as my
nose normally occupies that space anyway)

#2 Something that is probably common to most auto darkening helmets.
When welding in strange positions (like trying to weld the alt/az base
assembly) Getting your head to a spot where you can see the weld, can
result in a shadow being cast on the sensor that triggers the auto
darkening. The result is a couple of times, If I didn't get my head
in the right position, the helmet didn't darken when I struck an arc.
My eyeballs don's seem any worse for wear, and I can only hope that
the UV and IR filter's are a permanently "On", but it did get my
attention a few times..


Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction, Testing, and
Coating site)

Press on: nothing in the world can take the place of perseverance.
Talent will not; nothing is more common than unsuccessful men with talent.
Genius will not; unrewarded genius is almost a proverb.
Education will not; the world is full of educated derelicts.
Persistence and determination alone are omnipotent.
Calvin Coolidge