Welding?

Nothing to "work out"

by AgentX86 - 2019-10-28 12:27:36

The answer is "no" above 90A, I believe is the number. You're welcome to ignore any recommendations but don't pretend that you have some magical work around the physics. It's not going to happen.

Welding

by tonkin - 2019-10-28 18:01:37

Hello and Thanks for the response.

Were or are you a welder, or RF Engineer?

What got me thinking about this was the possibility of using a Faraday shield.

If not for that item, most of us would be blind or sterile from the Microwave oven in our

kitchens.

I don't ignore warnings as a rule,but I do like asking questions.

In the past I've done a lot of welding for charities needing something and it does bother me a bit to no longer do it. And the sorry fact I have every form of it sitting in by work shop  gathering dust. Cha ching...

Luckily I can still gas weld till the cows come home;-)

Thanks Again.

I are an engineer

by AgentX86 - 2019-10-28 22:00:58

A faraday cage will shield electrostatic or electromagnetic waves but it won't do squat against magnetic fields, which are the problem.  Modern pacemakers are well shielded against EM waves but magnetic shielding is impractical (requires a massive amount of magnetic material - i.e. iron) so isn't done.

I get your pain but the guys who design these things aren't stupid.

Welding

by tonkin - 2019-10-29 05:10:33

Hello Again!

Just got the OEM word on arc welding.

160 amps or less.

24 inch between torch/arc and heart device.

5 feet between work area and welding power unit.

Ground clamp as close as possible to point of welding.

(And a safety observer)

That should put Mig back in play, Mine is 135 amp max.

Mig "The glue gun of welding."

Even limited to 160amps that leaves Tig and Stick with some

room to work with.

As far as magnetic fields I hear what you are saying. In other discussions

one person felt that his unit when into "pre-set rate" for no reason.

Only later to find out where he was standing was on the other side of a wall where

the power distribution was located for their equipment room.

I see a potential Apple AP for detecting fields with a smart phone!

Thanks

Preset rate

by AgentX86 - 2019-10-29 08:13:06

There is a *lot* of confusion about PM interference. There is a magnetically activated reed switch that will put the PM into a "safety " mode, where it will ignore external stimuli and go into an "open loop" mode. If this is tripped,  you may not feel the greatest and may not perform well but nothing seriously bad will happen.

The real concern is that the AC magnetic field will induce a voltage in the leads which will fool the pacemaker into thinking that your sinus node is functioning properly, when it's not. There are other manifestations of this sort of fault, none good.

Please listen to the experts on this. They really aren't as stupid as people here pretend. It's really not worth it.

Welding...

by tonkin - 2019-10-29 18:55:31

Hello Again.

A little confused?

OEM =Original Equipment Manufacturer(Pacemaker) =Expert.

If the expert is willing to print a specification/guideline, it should be legit.

Let's leave it there...

Again, if there are any members that were or are still welding,

I'd be interested in your personal thoughts or experiences.

Thanks.

same question about welding

by bob h - 2019-12-26 12:36:36

Tonkin if you get anymore info let me know. i recently got my pm and do some mig welding . my manufacturer has the same guidelines you quoted...my mig is @ 100 amps max. 

i have also been told not to use chainsaws....what is up with that? i normally cut my own firewood for heating our home...????

thanks