Here at the Uni lab we have a nice articulated lamp that lacks a base. It’s been sitting on a corner for ages so I set to make a new clamp for it.
The frame is just a bit of T beam with a nut and some square tubes welded.
For the handle I used a bit of 3/8 threaded rod and a big washer I had lying around. In order to fix it I decided to make a hole along the axis and tap it to M3. After center punching the rod I screwed it to the drill press, using a center drill to align it. The plan was foiled when I tried to drill, as I left the base loose and it moved. But it’s good enough.
My initial idea was to use another nut and a locking pin behind the front washer but that used up a loot of the available space inside the clamp. After a bit of head scratching I ground a small taper and added a small washer to push the bigger one instead of a nut. I’m quite proud of how it turned out.
The last two days I finished the welds on those clamps, built some to hold the other end of the ropes and four sturdier to screw to the roof trusses. All the screws are paired with either a nylock or two nuts locked to each other.
I painted the pieces for the bottom frame with black enamel and the ones for the roof with white to match the rest of the room. I know they’ll rust in some weeks but I left the blued surface exposed. I never tire of looking at them.
Today I bought a used battery and decided to crank this old Peugeot 504 to see if the engine was seized or other problems lurked.
It’s been sitting there since 1998 but the diesel in the tank did not smell funny so I used the little pump on the filter until it became hard. On the last strokes I heard a subtle noise and there was a tiny leak on the line.
When connecting the battery there was a small spark and the position lights turned on. I let the glow plugs do their job and tried to crank.
Nothing, just a small click of a relay inside the dash. After a couple of times it turned with some effort but refused to start.
I let the battery rest for a moment and tried again. This time it roared as I pressed the accelerator, puffed some smoke and then idled calmly. I can hardly believe it awoke from a two decade slumber just like that.
Now I have to fix the water circuit (the hoses are dry and crumbling) and the clutch so I can move it around with a bit of ease.
That’s a 1981 Peugeot 504 (diesel) that belonged to my grandfather. After his death about 20 years ago it’s been sitting first on the original garage and lately inside this shed that we are fixing up.
The tires have an inner tube as it was usual on that era and that’s an advantage, I doubt that any contemporary tubeless would still be sealed after spending so long being flat.
Tire after 20 years.
Tire after 20 years.
I had a bit of space to speed up while pushing and the front wheels went by with relative ease. However, there’s a small step and I couldn’t make it go further with the initial momentum alone.
I lifted the car with a jack and made a small ramp out of bricks and a slab of wood. I carefully released the jack and the car slowly moved on its own. The underside looks quite good for a machine of that vintage.
I spent most of the last weekend studying and a bit sick.
When not reading for the Uni I binge watched a lot of talks from previous editions of the CppCon, because that’s obviously what only a sick person would do.
And after not being on that scene for quite a while I found that, like for some wines, the time made it nicer.
The use of auto variables when iterating containers, lambdas, parallelization and inclusion of atomic operations (albeit I believe they are insufficiently documented and will bite a lot of people) are just some of the things that surprised me in a good way. There’s a host of cool stuff under <algorithm> and the new optimizations (like the ones carried for constexpr ) are incredible.
A while ago we bought a very nice set of chairs with a chromed base and the bog standard pneumatic height adjustment.
After a lot of use a couple of them had the welds on the base break apart. I took one home and after thinking a bit I chose to make a stiffening plate instead of just redoing the missing parts as that area looked very flimsy.
I traced the outline on some cardboard and then cut a bit of plate with the plasma torch.
Some light prep and careful welding made it usable again. I tried first with a small 6013 rod but the arc wandered and blew a hole through the thin base. I had more success with 7018. The welds look horrible but are strong enough, I jumped a couple of times and it didn’t even notice.
Sometimes I use wire cups and wheels on the grinder. Screwing them is easy but the clearance between the guard and the tool makes it very cumbersome to use an ordinary wrench to loosen them. And also they come in different sizes.
So instead of having to carry around two tools that aren’t fit I fashioned one with some flatbar. The welds are pretty enough for a beginner and this application.
After that I gently heated it over the stove to reach a lovely shade of iridescent blue:
We are installing an intercom system and the front door unit is meant to be mounted in a recess in the wall. But the problem is that that wall is not really suitable for making such a hole.
I cut some strips of flat stock and fashioned a box. It has a couple of tabs to bolt into the wall and another ones threaded to hold the device. This is going to be painted later but I love that blue shading.
I’ve been working on and off on this for the last couple of weeks. The space we’ll have on the comms rack to handle the wiring isn’t that great and I saw on a couple of places patchbays that are articulated.
I thought on adding a twist to that and mounting everything on rails. This way I can slide it from behind the rack and then unfold it, gaining access to both sides.
We bought some pre-drilled (but not taped, ugh.) angle with the holes spaced in standard units, that was welded into a fixed frame with a couple of hinges.
This will hang from a small cart with iron wheels that rides on a couple of rails fixed to the walls.
Today while working on the rack closet the welder died on me for no apparent reason. But, after power off it made a couple of noises and the fan ran for a moment.
For being a Chinese machine it actually looks quite good and neat on the inside. The boards have conformal coating and just a tad of flux residue on some pads. The only thing out of place was a blob of solder on a header instead of a jumper.
I made a couple of measurements, the high voltage section was fine but the control supply was totally dead, except for a brief moment when turning off the main switch. Traced back from that board until finding a small block with a forward converter (kinda odd, I expected a flyback). The only component with bad readings was the recovery diode. I swapped in an UF4007 and at the next flick it was alive again.
Of all the things that could go wrong with a welder on novice hands this was not expected.