Day 50

Morning
Without any properly sized CT's for the bombardment feedback, we looked at getting a current switch that could be used to trigger the external limit on the trigger board. The problem was that the only ones Jim had in the shop were normally closed, so it would have to be put together with a relay to make it work. At this news, Tony decided to just wait until Monday to get the real CT's. I came back and worked on the welder upgrade. I started to revise the desired theory of operation document when I became distracted by the errors in my I/O sheet. It took me the rest of the morning to improve it, but I did make it much more useful and found old oil on EBW 2's Stokes 212 pump.

Afternoon
This was equipment overview time. Our third installment skipped over welders because of the amount of time spent working on four. Instead, we tackled arc furnaces. I learned a lot more about the things that are done to the metal to get a more consistent chemistry, like how to combine portions from different parts of the melt. I haven't spent much time working on any furnace, so this will probably be the majority of what I learn. We also shut down a DI water pump on 14 to see if the new one can handle the full load.