2 ms·
> if you consider 10e-5 torr vacuum to be trivial Its not hard to achieve at all. Electron beam welders at work have 1E-6/1E-7 in the E-gun chamber all day lon
by MisterTea 3y ago
> if you consider 10e-5 torr vacuum to be trivial
Its not hard to achieve at all. Electron beam welders at work have 1E-6/1E-7 in the E-gun chamber all day long held by a little turbo or diffusion pump. The chambers aren't made from anything exotic just stainless steel and/or aluminum with viton o-rings.
My little e-gun experiments are all done with a Alcatel Pascal 2008 and I can achieve ~3E-3 with just that pump. I'm building a bigger system with a VHS4 diffusion pump w/cold trap that should get me into -6 territory easily.
- jacquesm 3y agoWhat on earth are you up to? :)
- MisterTea 3y agoNothing crazy ;-) Actually I'm just playing with plasma electron sources for heating/welding/melting.
- jacquesm 3y agoNeat. I had a Thermal Dynamics 12 KW plasmacutter and a rig to control it across three axis. Best tool I ever owned bar none. From thinking about something to having it in your hand in a couple of minutes in steel up to 1" thick. Amazing toy. I figured out that by moving it faster than it can cut you can 'score' steel and if you use that creatively you can make fold-at-the-lines steel structures that you then weld up on the edges. You can make super complex stuff like that in no time at all and you usually don't need any jigs other than a few magnets to line things up prior to tack welding.