Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
On Thu, 6 May 2010 11:17:59 -0400, "Ed Huntress"
wrote: "Winston" wrote in message ... On 5/6/2010 7:33 AM, Pete Snell wrote: Winston wrote: What make and model welder, Pete? Perhaps we can download a schematic and have a look. http://www.millerwelds.com/service/ownersmanuals.php Is it possible the fan's thermostatic control is wired on the 'line' side of the power switch as we see on page 30 of http://www.millerwelds.com/om/o2223r_mil.pdf ? Thanks Winston. It's a Lincoln Squarewave 275. The switch is mechanically broken (you can feel it) I'll just have to replace it. I have been thinking though (uhoh). This welder has the optional power factor capacitors installed. I should probably discharge them before poking around in there. What would be the best procedure for that? (they're big suckers) Or am I worrying about nothing? Safety First! I'd clip an incandescent lamp across the phases starting now so that the caps are reasonably flat by the time the covers come off. After the covers are off, I'd use a 'shorting stick' across the caps as insurance. (Wear Protection please) It's hard to believe how fast you can melt a 2-inch section of screwdriver blade, isn't it? I hate the sizzling noise as a glob flies by your ear. g Obviously an observation by a reader rather than an experiencer. Molten globs of screwdriver make no sizzling sound as they fly by. The sizzling sound happens when they hit skin and make that distinctive odor of burnt flesh. |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
Don Foreman wrote:
Obviously an observation by a reader rather than an experiencer. Molten globs of screwdriver make no sizzling sound as they fly by. The sizzling sound happens when they hit skin and make that distinctive odor of burnt flesh. I hate it when smell the burn before I feel it. Wes |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
"Wes" wrote in message ... Don Foreman wrote: Obviously an observation by a reader rather than an experiencer. Molten globs of screwdriver make no sizzling sound as they fly by. The sizzling sound happens when they hit skin and make that distinctive odor of burnt flesh. I hate it when smell the burn before I feel it. Wes I must have missed that post when Don posted it. I should have asked how many globs of molten screwdriver have hit Don's skin? I mean, does he have a lot of experience with molten screwdrivers burning into him? d8-) -- Ed Huntress |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
On Mon, 17 May 2010 08:15:18 -0400, "Ed Huntress"
wrote: "Wes" wrote in message ... Don Foreman wrote: Obviously an observation by a reader rather than an experiencer. Molten globs of screwdriver make no sizzling sound as they fly by. The sizzling sound happens when they hit skin and make that distinctive odor of burnt flesh. I hate it when smell the burn before I feel it. Wes I must have missed that post when Don posted it. I should have asked how many globs of molten screwdriver have hit Don's skin? I mean, does he have a lot of experience with molten screwdrivers burning into him? d8-) Not a lot. I do eventually learn. I had a mentor teaching me photography while I was in high school. He was a teacher of photography and driver training in a high school different from the one I attended. Stu & Annette were friends of my parents, Annette and Ma worked together daily in their jobs as nurse and physician. Stu's high school had some strobes that crapped out, couldn't find a service tech that would attempt to repair them. TV repairmen wouldn't touch them. I'd learned a bit about electronics, so with adolescent confidence I said I'd fix them. And so I did. Typical energy of strobes then, circa 50s, was 50 joules though some were 100 joules. Shorting a cap with a screwdriver dumps that energy RFN, thousands of kilowatts. That said, 50 joules is less than the energy of even a .22 LR rimfire cartridge, but dissipating that in a screwdriver blade does result in a report like a gunshot and obliteration of the screwdriver blade. It also rattles the hell out of sleeping parents. Anyone who has done any overhead welding knows about stink-sizzle. If the owies are iced quickly enough they're no more than skeeter bites though they're ugly for a few days and do leave scars. |
#5
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
"Don Foreman" wrote in message ... On Mon, 17 May 2010 08:15:18 -0400, "Ed Huntress" wrote: "Wes" wrote in message ... Don Foreman wrote: Obviously an observation by a reader rather than an experiencer. Molten globs of screwdriver make no sizzling sound as they fly by. The sizzling sound happens when they hit skin and make that distinctive odor of burnt flesh. I hate it when smell the burn before I feel it. Wes I must have missed that post when Don posted it. I should have asked how many globs of molten screwdriver have hit Don's skin? I mean, does he have a lot of experience with molten screwdrivers burning into him? d8-) Not a lot. I do eventually learn. And it's good for the screwdriver business. d8-) I had a mentor teaching me photography while I was in high school. He was a teacher of photography and driver training in a high school different from the one I attended. Stu & Annette were friends of my parents, Annette and Ma worked together daily in their jobs as nurse and physician. Stu's high school had some strobes that crapped out, couldn't find a service tech that would attempt to repair them. TV repairmen wouldn't touch them. I'd learned a bit about electronics, so with adolescent confidence I said I'd fix them. And so I did. Typical energy of strobes then, circa 50s, was 50 joules though some were 100 joules. Shorting a cap with a screwdriver dumps that energy RFN, thousands of kilowatts. That said, 50 joules is less than the energy of even a .22 LR rimfire cartridge, but dissipating that in a screwdriver blade does result in a report like a gunshot and obliteration of the screwdriver blade. It also rattles the hell out of sleeping parents. Anyone who has done any overhead welding knows about stink-sizzle. If the owies are iced quickly enough they're no more than skeeter bites though they're ugly for a few days and do leave scars. Well, my experience with electric melting comes from shorting car batteries. I do some welding, but never overhead. I never weld anything I can't turn over. As for the sound when a glob of molten lead whizzes by, I never recorded it, but the scary shock of seeing it probably produces a noise of its own in your head. I'm sure many people here recognize it. -- Ed Huntress |
#6
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
On Tue, 18 May 2010 09:13:03 -0400, "Ed Huntress"
wrote: As for the sound when a glob of molten lead whizzes by, I never recorded it, but the scary shock of seeing it probably produces a noise of its own in your head. I'm sure many people here recognize it. That's the same effect as sonic boom from the passing of a supersonic aircraft. |
#7
Posted to rec.crafts.metalworking
|
|||
|
|||
Oh Fuuuudddgggee.
Don Foreman wrote:
I had a mentor teaching me photography while I was in high school. He was a teacher of photography and driver training in a high school different from the one I attended. Stu & Annette were friends of my parents, Annette and Ma worked together daily in their jobs as nurse and physician. Stu's high school had some strobes that crapped out, couldn't find a service tech that would attempt to repair them. TV repairmen wouldn't touch them. I'd learned a bit about electronics, so with adolescent confidence I said I'd fix them. And so I did. Typical energy of strobes then, circa 50s, was 50 joules though some were 100 joules. Shorting a cap with a screwdriver dumps that energy RFN, thousands of kilowatts. That said, 50 joules is less than the energy of even a .22 LR rimfire cartridge, but dissipating that in a screwdriver blade does result in a report like a gunshot and obliteration of the screwdriver blade. It also rattles the hell out of sleeping parents. Years ago I was developing some film when I noticed that the battery pack for a Honeywell Strobonar had finished charging. Not thinking too much, I yanked it out of the charger while my my hand was still slightly moist from a developing chemical that was on it. Oh chit, in the process of handling it, I made contact with the contacts on the pack (9.6v) and learned you can get burned by low voltage if your hand has conductive chemicals wetting it. Yikes! I got a steam burn from it that hurt like he double hockey sticks. Wes |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Oh Fuuuudddgggee. | Metalworking |