R
Rich Grise
- Jan 1, 1970
- 0
crossposted to sci.engr.joining.welding and sci.electronics.design
please manage followups intelligently, thanks.
I've fashioned sort of a paper catcher for my Canon printer, with
..040 TIG filler rod and duct tape. So I thought it'd be cool to
spot-weld it, and so I STFW spotwelders and realized I have a
scrap microwave oven (I don't know if it works or not, but
I have two others anyway) and access to a machine shop, so I'm
contemplating what it would take to make one. I have in mind
something on the order of a fat pliers, but insulated. I can
get "glass pliers" at McMaster-Carr,
http://www.mcmaster.com/asp/DisplCt...A71&t1=PN&ScreenWidth=1600&McMMainWidth=1019#.
[wrapped terribly - please cut'n'paste]
but I wonder what kind of temp. they'd stand up to - alternatively,
does anyone know of either something like that that would handle
high temperatures, or from experience, tell me not to worry
because the electrode holders only get up to XXX deg. C or
something. I've worked with "Garolite," which is basically
phenolic - very nice to machine with, but it scorches. But
maybe a couple of lumps of copper wouldn't get too hot doing
..040 steel wire at 4VRMS.
And, if anybody's done that before, (.040" dia. 308L SS), what
kind of amps could I expect? They recommend #4 wire, so I
expect maybe close to 100. (hmmm - how many amps does it
put out at maggie voltages? How many watts was the oven?
Ah, that's it.) 750W @4V = 187.5A. Hm. But for a very short
period of time, and that's assuming superconducting 308.
I guess I should just do it, and borrow an amprobe. Or
watch the joint.
So, can anybody recommend either glass-filled epoxy, garolite,
or something else for an electrode holder? And is brass better
than copper for the electrodes, because it's harder?
Thanks!
Rich
please manage followups intelligently, thanks.
I've fashioned sort of a paper catcher for my Canon printer, with
..040 TIG filler rod and duct tape. So I thought it'd be cool to
spot-weld it, and so I STFW spotwelders and realized I have a
scrap microwave oven (I don't know if it works or not, but
I have two others anyway) and access to a machine shop, so I'm
contemplating what it would take to make one. I have in mind
something on the order of a fat pliers, but insulated. I can
get "glass pliers" at McMaster-Carr,
http://www.mcmaster.com/asp/DisplCt...A71&t1=PN&ScreenWidth=1600&McMMainWidth=1019#.
[wrapped terribly - please cut'n'paste]
but I wonder what kind of temp. they'd stand up to - alternatively,
does anyone know of either something like that that would handle
high temperatures, or from experience, tell me not to worry
because the electrode holders only get up to XXX deg. C or
something. I've worked with "Garolite," which is basically
phenolic - very nice to machine with, but it scorches. But
maybe a couple of lumps of copper wouldn't get too hot doing
..040 steel wire at 4VRMS.
And, if anybody's done that before, (.040" dia. 308L SS), what
kind of amps could I expect? They recommend #4 wire, so I
expect maybe close to 100. (hmmm - how many amps does it
put out at maggie voltages? How many watts was the oven?
Ah, that's it.) 750W @4V = 187.5A. Hm. But for a very short
period of time, and that's assuming superconducting 308.
I guess I should just do it, and borrow an amprobe. Or
watch the joint.
So, can anybody recommend either glass-filled epoxy, garolite,
or something else for an electrode holder? And is brass better
than copper for the electrodes, because it's harder?
Thanks!
Rich