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Hey all, my plasma table build is coming along really well, but I still do need to keep an eye on it almost constantly. What glasses do you guys use for that? A 5 shade like the Hypertherm recommends for hand cutting is too dark, I'll trip on stuff. The arc is further away than arm's length also, so less protection is required. Has anyone tried a shaded safety glass like this: http://www.amazon.com/DPG52-2C-Contr...otection+smokeI'm wondering if this will be dark enough to make any difference? The clear ones I'm using right now block UV, so that's good, but I can still see the arc in my vision when I turn away, so I think it's still doing damage. I know the easy answer is "don't look at it", and it's not like I'm staring at it for minutes at a time, but there are times when you need to see what's going on to make sure the cut is clean, etc.
Reply:I use a shade 5. Dont guess with your eyes.
Reply:I didn't realize they made shade 5 glasses in this style (I've only seen the full face or the cutting goggle style that would be really hot on your face.) It looks like they do, though:http://www.amazon.com/gp/product/B00...=ANJ55CPLZYH36
Reply:I bought a pair of those Nemesis glasses recently for plasma cutting and really like them. I just cut with a hand torch and put them on underneath my full face shield. Sounds like they'd be perfect for your needs, too.
Reply:Great, thanks for the recommendation!
Reply:AWS shade 5 is adequate for plasma cutting at 40 amps or less.....more amperage requires a higher shade number. Here is the chart out of the Hypertherm manuals. When cutting...the arc is often shielded by the material, and you generally get only a small amount of the UV light from the small gap between the torch and the material. Cutting near edges or gouging allows for a lot more exposure. Good idea to cover your skin if you are doing a lot of cutting...or are cutting at higher amperage.In over 37 years of plasma cutting I have never gotten arc flash to my eyes....a lot of the cutting I was exposed to was in the 260 to 1000 amp range....an AWS #14 shield is necessary at 1000 amps......and you want 100% of your skin protected, trust me! Hypertherm has a nice face shield with both clear and tinted flip up shields....good for grinding and many cutting needs.Jim Colt Last edited by jimcolt; 03-08-2015 at 01:33 PM.
Reply:Originally Posted by jimcoltHypertherm has a nice face shield with both clear and tinted flip up shields....good for grinding and many cutting needs.
Reply:Originally Posted by jimcoltAWS shade 5 is adequate for plasma cutting at 40 amps or less.....more amperage requires a higher shade number. Here is the chart out of the Hypertherm manuals. When cutting...the arc is often shielded by the material, and you generally get only a small amount of the UV light from the small gap between the torch and the material. Cutting near edges or gouging allows for a lot more exposure. Good idea to cover your skin if you are doing a lot of cutting...or are cutting at higher amperage.In over 37 years of plasma cutting I have never gotten arc flash to my eyes....a lot of the cutting I was exposed to was in the 260 to 1000 amp range....an AWS #14 shield is necessary at 1000 amps......and you want 100% of your skin protected, trust me! Hypertherm has a nice face shield with both clear and tinted flip up shields....good for grinding and many cutting needs.Jim Colt
Reply:1000 amps is used for cutting 4" to 6" thick stainless and aluminum, argon/hydrogen is used as the plasma gas with a water shield. Very loud, very bright. Not for the meek!Jim Colt Hypertherm Originally Posted by JasonPAtkinsThanks for chiming in, Jim. I assume those charts are the recommended shade if you're arm length away from the cut though, right? Light falls off fast with distance (I think from my photography days it was 1/4 the light intensity at 2x the distance), so I think the shade 5 will be fine for watching my lowly 60a machine. 1000A. What kind of application is that for? It's hard to imagine a machine with enough feed rate to be able to keep up with 1000A on 1/4 plate! Must be for the shops that need to keep crazy feedrates on thick stuff, eh? Or for aluminum? I read you need more amperage on Alu because it's such an effective heatsink. Either way, out of my league!
Reply:I'm sure it is made by Sellstrom, but I do not know the Sellstrom models, so couldn't say if it was the same.Jim Colt Hypertherm |
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发表于 2021-8-31 22:41:44