The Craftmans Shop > New from Old
Tidying Up An Analoy 1401 Alloy Analyser
awemawson:
It's good to get you off to sleep, and the original in Romanian is even better :clap:
Stick with the management summary and you'll be fine :thumbup:
awemawson:
Phil Fern very kindly hand crafted an EXCELLENT tungsten point for me that arrived in this mornings post allowing me to experiment.
Sadly it seems that carbon arcs and tungsten arcs are different animals. I cannot maintain the arc at all with the tungsten, whereas with the carbon you can strike it and draw it out to a few mm length. I'd be interested in the physics of this if anyone has any knowledge that they'd be willing to share.
All is NOT lost though as this puts to bed a nagging thought that I've had for some years that this would be a possible way forwards. It isn't and I can put it in the 'shame but . . ' box and move on!
A big thanks to Phil Fern, you sir are a Gent :thumbup:
Muzzerboy:
Interesting, if disappointing.
Is the "carbon" electrode really just pure carbon? You'd imagine it might need to be although that would make it fairly brittle. That presumably makes material sourcing pretty difficult.
I know from my professional experiences that components such as motor brushes that are often referred to as "carbon" or "graphite" generally contain a range of constituents. In the case of brushes, this includes copper, ash, binding agents and other proprietary ingredients. Pity about the tungsten, as that is easy to procure in pure form.
awemawson:
Murray, the genuine electrodes have a feel and consistency of a soft pencil. I've found a source of 3.1 mm '6B' pencil leads so when they arrive I'll experiment with those.
. . . it's amazing where these little project lead you !
Muzzerboy:
You are indeed entering new spheres here. I see our artistic friends even use 8B and 9xxB pencils, although not generally in clutch / mechanical format. The 6B seems to be the best available in 3.1mm, presumably the Faber Castell brand. Probably rather brittle to be any smaller or softer.
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