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| spuddevans:
That looks very nice John, I wonder if doing a longer length would be easier for Steve as he's working with what looks like several fairly thin pieces to twist around a hollow core, it should be easier than doing the same with solid material and the core should help to keep the twist uniform. I think I will be filing this away for future reference :thumbup: Tim |
| cedge:
John The uniformity problem hasn't reared its ugly head as of yet. The wire is wrapped around a core that physically defines the maximum twist. The core can then either be removed or retained according to the need. The short piece was actually a much longer piece that I trimmed to show the concept. I've already got a small clamping device in mind that will allow me to maintain the twist while handing things like soldering, transferring the work piece etc. Heat wasn't needed since the rods are brazing rod and quite happy to bend when tortured. This might have contributed to the even twist since the rods did not vary in rigidity due to any annealing effects. Where I ran into a stone wall was trying to twist a tapered version. Everything worked until the last little smidgen of twist cause the small end to expel one of the strands due to the squeezing effect the smaller radius caused. A solution is in the fuzzy mental state of cogitation but it would require a bit of tedious prep of the wire. I'm also wondering if spot annealing the small end might help. I'm pleased with the results so far. My shot in the dark calculations for radii and wire count were really pretty close to the mark. The final tool should be quite simple to make and use. Thank the gods for that blessed DRO. Steve |
| bogstandard:
I knew you would have some sort of secret weapon Steve. Ignore all I have said about replication. I am a little worried over the taper thing though. Shouldn't the rods taper in diameter as it gets smaller, or is that asking a little too much at this time? John |
| cedge:
John That, my almost overly astute friend, is exactly the stone wall I mentioned. What I'm wondering is if the annealing idea will allow them to "stretch" a bit letting me cheat my way across the finish line. The taper thing would be a bonus, but a nice one to have on tap if and when the proper time comes. The straight spiral will let me get the look I want, so my basic goal has already been conquered. The rest is fine tuning the tooling end of things. Steve |
| Tinker:
Just a random odd little thought... Probably wrong, but maybe not. If you were to start from the small end and increase the twist as the core gets bigger, would you end up with something in the right neighborhood? |
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