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Mar. 17th, 2018 10:22 pmToday was a lot of day.
I got up a little early, did my Japanese homework, and headed to class. We're learning how to put together somewhat complex questions: things like, "Are you going to Narita tomorrow? Did you go to Osaka alone? Where are you and your friend going next week?" We have two weeks off, because our instructor is going to Narita next week. (Long discussion of the right verb to use, because while she's from Narita, now she lives here, so she isn't exactly returning to Narita.)
After that, a bit of running around for Ingress. There's a month-long competition, that the people who set this up decided should be a delta: how much you capture compared to how much you have currently. In our area, that means the other team's best strategy is to do nothing until the second to last and last measurements, and then try to grab as much as they can. Our best strategy is to just barely increase our holdings. I went out and jogged through three densely populated areas, capturing stuff, but held down to a reasonable amount so I should easily be able to increase my effort by 20% the next two weeks. That doesn't mean I can increase my effectiveness: if they try to play hard, I might get swamped. Usually this is an offense game. In this contest it's somewhat biased towards defense, locally. I found this art on the side of a building while power walking between groups of people wearing green and drunk at noon.
Then home to work on stuff for work. By doing this, I can offset next Friday, when I am officially supposed to be working from home, as Monty recovers from cancer surgery.
We got these amazing LED's, with very high efficiency and very high power. There are different measures of efficiency, but by any measure, these produce a simply enormous amount of light for the waste heat they create. I still need to dissipate a lot of heat, though.
So I grabbed a heatsink from the big box of heatsinks in back. This was mostly a joke: this heatsink is only barely able to handle the heat from two of these, if it's just sitting flat on the table.
This is what I actually implemented, after running the heatsinks through the mill to make the backs as flat as possible, and adding a bit of thermal compound. The fans will help them dissipate plenty of heat.
Then I welded up a fan adapter for the laser cutter. This is a helper fan for the exhaust vent. The laser cutter produces huge quantities of really nasty airborne detritus, like cubic meters of cigarette smoke. I'd intended to 3d print this, but it's almost at the edge of what my 3d printer can handle, size-wise, and it is a good idea for me to retain my aluminum-welding skills. Well, sort of retain: I made a mess. I do better when I have the two pieces overlapped, so I can heat the larger piece and then melt the edge of the smaller piece into it. When they're just touching, as they heat and melt they withdraw from each other, and I have to add filler material in, and if I'm not careful I'll blow a hole and have to stitch material back in to refill it.
But I managed it, after a bit. I formed a sheet around a round piece, welded along the seam, to form a tube, then put that on a plate and welded around the joint, drilled holes in the corners, then drilled a line of holes around the whole inside where I wanted the air to move through, cut that out, and took a large coarse round file to it to smooth out the jagged edges left after all the drill holes.
Now I have to make an insulated window insert, so this can blow out the window when I want, but will be closed off the rest of the time to not let cold air run down the vent line and freeze the water-cooled laser tube.
I made bread this evening, and the house smells like it. Mmmmm.
I got up a little early, did my Japanese homework, and headed to class. We're learning how to put together somewhat complex questions: things like, "Are you going to Narita tomorrow? Did you go to Osaka alone? Where are you and your friend going next week?" We have two weeks off, because our instructor is going to Narita next week. (Long discussion of the right verb to use, because while she's from Narita, now she lives here, so she isn't exactly returning to Narita.)
After that, a bit of running around for Ingress. There's a month-long competition, that the people who set this up decided should be a delta: how much you capture compared to how much you have currently. In our area, that means the other team's best strategy is to do nothing until the second to last and last measurements, and then try to grab as much as they can. Our best strategy is to just barely increase our holdings. I went out and jogged through three densely populated areas, capturing stuff, but held down to a reasonable amount so I should easily be able to increase my effort by 20% the next two weeks. That doesn't mean I can increase my effectiveness: if they try to play hard, I might get swamped. Usually this is an offense game. In this contest it's somewhat biased towards defense, locally. I found this art on the side of a building while power walking between groups of people wearing green and drunk at noon.
Then home to work on stuff for work. By doing this, I can offset next Friday, when I am officially supposed to be working from home, as Monty recovers from cancer surgery.
We got these amazing LED's, with very high efficiency and very high power. There are different measures of efficiency, but by any measure, these produce a simply enormous amount of light for the waste heat they create. I still need to dissipate a lot of heat, though.
So I grabbed a heatsink from the big box of heatsinks in back. This was mostly a joke: this heatsink is only barely able to handle the heat from two of these, if it's just sitting flat on the table.
This is what I actually implemented, after running the heatsinks through the mill to make the backs as flat as possible, and adding a bit of thermal compound. The fans will help them dissipate plenty of heat.
Then I welded up a fan adapter for the laser cutter. This is a helper fan for the exhaust vent. The laser cutter produces huge quantities of really nasty airborne detritus, like cubic meters of cigarette smoke. I'd intended to 3d print this, but it's almost at the edge of what my 3d printer can handle, size-wise, and it is a good idea for me to retain my aluminum-welding skills. Well, sort of retain: I made a mess. I do better when I have the two pieces overlapped, so I can heat the larger piece and then melt the edge of the smaller piece into it. When they're just touching, as they heat and melt they withdraw from each other, and I have to add filler material in, and if I'm not careful I'll blow a hole and have to stitch material back in to refill it.
But I managed it, after a bit. I formed a sheet around a round piece, welded along the seam, to form a tube, then put that on a plate and welded around the joint, drilled holes in the corners, then drilled a line of holes around the whole inside where I wanted the air to move through, cut that out, and took a large coarse round file to it to smooth out the jagged edges left after all the drill holes.
Now I have to make an insulated window insert, so this can blow out the window when I want, but will be closed off the rest of the time to not let cold air run down the vent line and freeze the water-cooled laser tube.
I made bread this evening, and the house smells like it. Mmmmm.
