Ridgeway Forge Studio Posted October 20, 2021 Share Posted October 20, 2021 Hello all! Just thought I would share my recent acquisitions- a 4ft cone, picked up for a steal at 75$usd... Small Crack at the top of the tong slot, but still a serviceable tool! Quote Link to comment Share on other sites More sharing options...
Daswulf Posted October 20, 2021 Share Posted October 20, 2021 Nice cone and at a steal of a price. Congrats! Quote Link to comment Share on other sites More sharing options...
TWISTEDWILLOW Posted October 20, 2021 Share Posted October 20, 2021 Very nice mandrel! I got cone envy now! Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 20, 2021 Share Posted October 20, 2021 Very nice! I don't remember seeing one with tabs for bolting it down; interesting detail. Quote Link to comment Share on other sites More sharing options...
Ridgeway Forge Studio Posted October 20, 2021 Author Share Posted October 20, 2021 JHCC, I'm pleased that mine has that feature- I'm thinking of temporarily bolting it to a wood frame- then I can step on the wood to keep the cone stable. Once I decide on a place, I may anchor it to the concrete. The cone wasn't really for sale- it was in a corner of a photo of an anvil for sale- When I messaged the gentleman, he said 75- I figured he must have left off a zero, but lo and behold, the best purchase I've made in a while! Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 20, 2021 Share Posted October 20, 2021 If you make the platform round, then you can roll it to different locations as you try out different layouts. Quote Link to comment Share on other sites More sharing options...
Ridgeway Forge Studio Posted October 20, 2021 Author Share Posted October 20, 2021 That's a good idea to make it round- the cone itself is hollow, so it's not as heavy as I would have expected- I estimate less than 70lbs. Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 20, 2021 Share Posted October 20, 2021 One trick that I have not yet tried myself is using the mandrel on the diagonal for long curves. There's a good photo of this in "The Art and Craft of the Blacksmith" by Robert Thomas, but I can't find my copy at the moment. Quote Link to comment Share on other sites More sharing options...
Ridgeway Forge Studio Posted October 20, 2021 Author Share Posted October 20, 2021 Funny you should mention that- I'm racking my brain to try and figure out the equation for making scroll forms on the cone- make them spiral and then flatten- but have to pull out my golden ratio cheat sheet to find out how many inches in between each spiral... Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 20, 2021 Share Posted October 20, 2021 Did you see my video about drawing logarithmic spirals? Quote Link to comment Share on other sites More sharing options...
Ridgeway Forge Studio Posted October 20, 2021 Author Share Posted October 20, 2021 I did not, but will now be saving for use! I haven't done a whole lot of spirals, but it is something that I've wanted to do since a university math class in 2014 where we spent 6 weeks on the Golden spirals Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 20, 2021 Share Posted October 20, 2021 As I note in one of the comments on that thread: Quote For the golden spiral, the growth factor is φ, the golden ratio; that is to say, the length of the radius increases by a factor of φ (roughly 1.618033) for every quarter turn. You can generate a golden spiral using this method by setting the protractor at 17° from perpendicular rather than the 5° shown in the video. I mentioned this in the video, but I referred to it as the Fibonacci spiral rather than the golden spiral. Strictly speaking, a Fibonacci spiral is not 100% identical with the golden spiral, but it’s a pretty close approximation. You create a Fibonacci spiral by combining a sequence of quarter circles with radii equaling the numbers in the Fibonacci sequence: 1, 2, 3, 5, 8, 13, etc. Because the ratio of adjacent Fibonacci numbers approaches φ the closer you get to infinity, the closer a Fibonacci spiral will be to a golden spiral the farther out you draw it. Quote Link to comment Share on other sites More sharing options...
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