[HN Gopher] Specimens of Fancy Turning (1869)
       ___________________________________________________________________
        
       Specimens of Fancy Turning (1869)
        
       Author : prismatic
       Score  : 13 points
       Date   : 2023-06-22 20:41 UTC (1 days ago)
        
 (HTM) web link (publicdomainreview.org)
 (TXT) w3m dump (publicdomainreview.org)
        
       | 082349872349872 wrote:
       | Hobby activity seems to follow what had been high-end industrial
       | tech a few decades before. In this case fancy lathing; in the
       | 20th century ham radio and model railroads (not to mention model
       | rocketry); in the 21st century the "home lab".
       | 
       | Are there other examples?
        
       | fwlr wrote:
       | Fascinating stuff, looks like it was achieved on a regular lathe
       | with with eccentric chucks (the piece is held off-center, so it
       | doesn't spin about its own axis, which is where the elliptical
       | and circular shapes come from). This fancy turning art form
       | advanced with the invention of the straight line engine and the
       | rose engine (https://en.m.wikipedia.org/wiki/Rose_engine_lathe),
       | which both use cams (protrusions and depressions on a wheel) to
       | produce consistent rhythmic alterations in either depth or
       | displacement. This art form is more commonly known as guilloche
       | and is found mostly on watch faces and banknote currency, where
       | it serves as 'proof of work' of extreme precision and
       | craftsmanship.
        
       | mauvehaus wrote:
       | If you're interested in this, you would be remiss if you didn't
       | check out David Lindow's work. He does contemporary ornamental
       | turning and builds the specialized lathes to do it:
       | 
       | https://lindowmachineworks.com/our-team/david-lindow/
       | 
       | A celebrated period work on the subject is Holtzapffel's work
       | Turning and Mechanical Manipulation. It is available on
       | archive.org:
       | 
       | https://archive.org/details/HoltzapffelVol5_1884
        
       ___________________________________________________________________
       (page generated 2023-06-23 23:01 UTC)