I was welding in a yard where a dog was being kept and didn't know if the dog would watch so I chained it out of sight of the work, but I have been pondering that situation all day... I was alone so I just removed the dog from view.....
Does anyone know if a dog's instinct will keep it from watching? Comments?
UV doesn't hurt when it is creating the flash burn. The pain only comes later, usually the next day, after the damage is done. The animal, or a small child, is unlikely to associate the two events. So they won't automatically learn to avoid the arc.
Note that UV is invisible, so the normal instinctive mechanisms of pupil contraction and blinking aren't invoked.
The arc is bright in the visible spectrum too, but not so bright that it is painful to look at from a reasonable distance (*not* welding distance, of course, but say 10 feet or more). So there is no instinctive reaction to blink or look away. You still can get a UV burn from it at the greater distance though. Beyond about 100 feet, the oxygen in the air attenuates the shortwave UV enough to prevent a burn from short casual exposures to normal welding arc intensities.
You need to make arrangements so that animals, young children, and fool adults don't have the opportunity to stare at the arc at distances less than about 100 feet. Much beyond that, you don't have to worry if they happen to glance at the arc, the UV will be attenuated enough to prevent flash burns.
Most animals, including cats and dogs, have much less "built in" UV protection than humans (who don't have all that much). My dog likes to be in the shop but is expelled during welding and plasma cutting.
Welding produces a lot of short wavelength UV. So does the sun but the ozone layer absorbs a lot of it. Animal eyes (including ours) are quite well adapted to dealing with the sun but not welding. Also, short lived animals have less adaptation to dealing with UV. Since damage from UV tends to be cumulative, less protection is acceptable from an evolutionary standpoint.
Would the doogles auto darkening, or do you have to teach Rover to lower the shield like a pro? If I know my dogs, which both have their on personality's, Boscoe will want to make sure that everything is going all right and be right in the midst of the job, so he would want auto darkening doogles. Now Elvis P, now there is a totally deferent story. He has a lot of places to go and check on, and be the supervisor of. So I'm pretty sure that he would just want the hand held shield version, well it would have to be converted to one that he would hold in his mouth, being as dogs don't have any thumbs. Never ends to frustrate Boscoe not having any thumbs. You ever try to run a bead with a wire welder with no thumbs? Poor ole Boscoe Bear howls through the night in utter anguish of not being able to run a decent weld. All because evolution let hem with no thumbs.
"One out of four people in the U.S. of A. suffer from being mentally unbalanced. The next time you are with three people, and they look and act normal; Guess who is the one that might be two tacos short of a combo plate?"
When I was welding my dog was more than 40 ft or more away and it was obstacles in between us so he didn't get direct light but I still think he has flash burn what's this what would a safe distance to keep him away would be and how can I tell for sure that he has it is his eyes look funny