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chat20200401 [2020.04.01 08:53] (current)
smismi7 created
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 +====Chat messages from George Burnell's 4/1/2020 presentation on 3-D Printing==== 
 +11:09:16 From Robert Melanson : Can that machine make a crown? 
 +11:09:53 From John Brown : Dr Puschak made a permanent crown for me using one of these machines while I waited in the dental chair recently. 
 +11:10:52 From Jerry Slate : Peter, what is your crown made of? 
 +11:14:39 From Steve Isenberg : Jerry, I don’t think Peter knows what the crown is made of. 
 +11:20:01 From Richard : What size tolerances are achievable via 3D printing - particularly compared to other processes? 
 +11:20:51 From Barbara Coughlin : +/- 0.05 mm 
 +11:21:41 From Richard : So 50 nm? 
 +11:23:19 From Barbara Coughlin : I don’t really know - it was just a quick google search 
 +11:24:38 From Charles H Holbrow : .05 mm is 50 microns not 50 nm 
 +11:25:02 From Jerry Slate : 0.05 mm = 50 micrometers = 50,000 nanometers 
 +11:27:18 From judymike : It depends on what  you're manufacturing.  For a large part, you wouldn't need 50 micron tolerance.  In the semiconductor device industry, tolerances in the nanometer range are typically required. 
 +11:27:55 From Carl Lazarus :  Does anyone know the status of a 3D printed steel pedestrian bridge that was supposed to be installed over a canal in Amsterdam? 
 +11:28:10 From Mitchell I. Wolfe : Italian hospitals were running low on valves for ventilators and the supply was not available. A university scanned one of the valves of them and 3D printed 100 of them which were started to be deployed. The cost was around $1 a piece. The manufacturer sued for patent infringement since they charge ~10K$ a piece... 
 +11:39:42 From Steve Isenberg : The wiki:  http://LCTG.toku.us 
  • Last modified: 2020.04.01 08:53
  • by smismi7