I had a nice little Miller spot welder for awhile, nice machine. It was an
electric resistance welder, with arms and tips and stuff like that. You put in
the workpiece, stepped on the pedal, waited a jif, let go, and the part was
welded. No arc, no spark, no bright lights. No welding hood, no lens.
If you are spot welding with an arc, then of course you'd need to protect your
eyes just as in normal arc welding.
Its a small portable/handheld unit made by Chicago Electric. It was
given to me by a friend who ended up not using it.
I have a few more questions about the welder though. The instructions
dictate to use the machine that you turn it on and then clamp the work
and wait for the "spark" and then release. As I understand it and from
the Welders Handbook first pressure is applied then current correct?
The instructions also say to use a hood/goggles,hearing protection AND
I have not used a spot welder before, but from all of the books that I
have and the spot welding I have seen done none of this spare the
goggles were used when welding clean metal. Im wondering if the
instructions are just being extra cautious?
Check out the MILLER site they have a free book you can download for spot
Click on the resistance spot welding link; it is the 6th book from the top.
direct link here ; http://www.millerwelds.com/pdf/Resistance.pdf
The general welding safety guide is a good choice for anyone just starting
out, plus it has a lense shade selector and a welding cable chart.
These publications are all free from the Miller site or you can pay a couple
of dollars for them off of Ebay.
They may not cover 100% of every topic but they are a good place to start
for begginer welders.
If you are spot welding on stainless or galvanized metal then you would use
the same degree of respiratory protection as regular welding.
Safety glasses are always a good idea when doing any kind of welding; you
never know when a bit of flying metal may try to get into an eye. The rest
of the statement is just a company covering the rears; basically telling you
too wear all your personal protective gear as you would for any other
welding process. Same statement I must have reused a hundred times in the
safety manual I am writing.
With the semiautomatic or fully automatic machines the clamping pressure is
applied first then the current is switched on. The manual models are another
story, the action of clamping starts the current flow; determined by the
switch near the clamp end that is used for adjusting clamping pressure.
Those instructions in the handbook were clearly written by lawyers. It's a lot
safer if you also stand inside a clear bubble, wearing a full radiation suit,
with a division of armor outside too. What a bunch of crap.
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