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Shield glass
Cita - 30/7/04 at 09:03 PM

Can anybody give some advize on which glass to use for my welding mask.
I use an old 120 amp stickwelder and i have problems with the darkness of the shield glass.
Only when i feed to much power the light from the welding rod is bright enough to see what i'm doing.

Mark Allanson - 30/7/04 at 09:07 PM

You need an EW9 lens, with a sheet of Evtech on both sides of the lens. Evtech is spatterproof, shatterproof - tha last thing you want is shards of green glass in your eyes when you blindly headbut a bit of your chassis after running a great pass.

Cita - 30/7/04 at 09:16 PM

Is that a European standard Mark?
I have a clear glass in front of the green glas but it certainly is'nt spatter proof!

One other question Mark,when i weld two RHS sections together when flat on the table,the weld is reasonable.When it comes to welding the corners the problems begin.I manage to get,in one stroke, a small layer on one box section and a small layer on the other section with inbetween a nice canyon.
Is there some technicque to overcome this?

Skirrow - 2/8/04 at 02:16 AM

Does anyone use one of the cheap, auto darkening helmets? The sort of thing you see for 60 quid on eBay.
Are they any good?

spunky - 2/8/04 at 04:05 PM

quote:
Originally posted by Skirrow
Does anyone use one of the cheap, auto darkening helmets? The sort of thing you see for 60 quid on eBay.
Are they any good?


I use a not so cheap Speedglass helmet, They are great, the only problems I've had is sometimes the gun tip can shield the arc and the visor can 'flicker'

John

Mark Allanson - 2/8/04 at 08:44 PM

quote:
Originally posted by Cita
Is that a European standard Mark?
I have a clear glass in front of the green glas but it certainly is'nt spatter proof!

One other question Mark,when i weld two RHS sections together when flat on the table,the weld is reasonable.When it comes to welding the corners the problems begin.I manage to get,in one stroke, a small layer on one box section and a small layer on the other section with inbetween a nice canyon.
Is there some technicque to overcome this?



The EW ratings are to BS standard, 8 is the lightest and 14 the darkest I have used, there may be others for specialist jobs that i havent come across,

As for your welding problem, do you get 2 passes, one on the horizontal tube and one on the vertical, if so, I havent come across that one, have you got any pictures? There are few welding technique problems which cannot be solved by turning up the power

James - 3/8/04 at 09:40 AM

quote:
Originally posted by Mark Allanson
There are few welding technique problems which cannot be solved by turning up the power




Cita,
I wonder if your wire feed rate is too slow (if you up this you may need to up the power as well). Keep the torch at 45° so it's pointed right at the root of the weld. You want to hold it about 8mm from the root.

Also, try cleaning out the shroud/tip (you can get special cutters to do this- I bought mine for £1 at a show and they're worth having) as I guess it's possible that spatter build up inside is causing the arc not to flow properly.

Hope that helps,

James