User Tools

Site Tools


projects:glass_sphere:work_logs:work_log_7

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision
Previous revision
projects:glass_sphere:work_logs:work_log_7 [2019/02/27 02:44]
tjhowse created
projects:glass_sphere:work_logs:work_log_7 [2019/03/19 12:34]
tjhowse
Line 10: Line 10:
 I strained off the water and soaked the glass again in distilled water. I dried it on a hotplate and measured 130g into four batwashed stainless steel cups. I fired them on a new profile. Step setpoint to 1000°C, wait an hour, step to 560°C, wait ten minutes. I strained off the water and soaked the glass again in distilled water. I dried it on a hotplate and measured 130g into four batwashed stainless steel cups. I fired them on a new profile. Step setpoint to 1000°C, wait an hour, step to 560°C, wait ten minutes.
  
-Insert screenshot of profile.+{{:​projects:​glass_sphere:​work_logs:​pasted:​20190319-105416.png}}
  
 The slugs came out with a smoother top than any previous attempt, with a clear concave meniscus. The slugs came out with a smoother top than any previous attempt, with a clear concave meniscus.
  
-Photos.+{{:​projects:​glass_sphere:​work_logs:​pasted:​20190319-105442.png}}
  
-Shine light through ​slugs.+I also put two slugs from the previous run into the furnace at 560°C for ten minutes to re-temper themI ground the edges round and have begun to flatten the top and they haven'​t cracked yet, in contrast to the two slugs that were tempered at 510°C which cracked during grinding. 
 +  
 +{{:​projects:​glass_sphere:​work_logs:​pasted:​20190319-105547.png}}
  
-Grind slugs flat.+{{:​projects:​glass_sphere:​work_logs:​pasted:​20190319-105559.png}}
  
-I also put two slugs from the previous run into the furnace at 560°C for ten minutes to re-temper them. I ground the edges round and have begun to flatten ​the top and they haven'​t cracked yet, in contrast ​to the two slugs that were tempered at 510°C which cracked during grinding.+Roughing down the flat faces on the linisher went better with the correct temperingUsing a jig and a weight ​was able to get the slugs to a lappable state much faster.
  
 === Video === === Video ===
  
-Pending +{{youtube>​L8Cs_J6q_Do?large}}
- +
-{{youtube>​PNHmRhPuz8g?large}}+
  
 ====== What I want to accomplish next time ====== ====== What I want to accomplish next time ======
  
   * Hand grind the slugs smooth   * Hand grind the slugs smooth
projects/glass_sphere/work_logs/work_log_7.txt · Last modified: 2019/03/19 12:34 by tjhowse