# MIG Vertical Up Passed!

Today I finished grinding my pieces cut from a vertical up weld on Monday. They were stuck in a press and bent just fine.

Now I can work on stick overhead, but I really have just one more day to complete it, which is unlikely.

# Bob Log III Concert

A friend asked me a week or two back whether I would like to go see Bob Log III, a one-man band. I had never heard of the guy, but my friend picks interesting groups; he also sent some YouTube video links that entertained me.

An hour ago, we left Radio Radio, where the concert was sponsored by Sun King Brewing. The concert was a good time. The first opening band apparently played homemade instruments; the second, from Fort Wayne, Indiana, was bluesy but needlessly loud. Finally Bob walked out, playing, in his velvet suit with its sparkles, his sparkly helmet, and the phone hanging from its bubble face mask. Throughout his performance he kept up an occasionally unintelligible narrative. He seems to honestly enjoy interacting with the audience. Particularly amusing to me was his habit of hitting a bombastic drum machine loop when he changed things or walked off stage to stroll and strum.

I enjoyed getting a look at the setup after the show ended: right foot bass drum pedal, left foot pedal to strike an upturned cymbal with a star-shaped tambourine inside, and a two-pedal unit hooked to some drum machines.

The bar kept running the odd animated movie Fantastic Planet, which I hadn't seen for a very long time.

# Method of Undetermined Coefficients

Today was the second test in ordinary differential equations. It was all about the method of undetermined coefficients, which is used to solve things like this:

$y''-2y'+5y=6e^{-x}x^{2}sinx$

I think I did well, but Monday will probably be when I find out for certain.

# Stick Vertical Up Passed!

Today I finally passed the vertical up with shielded metal arc welding. It is a great relief since it has taken me a long time to do this.

I note that I got another blast of sparks down my left glove. This left a good-sized blister in an inconvenient spot. I also got some hot metal bits melted into the sole of my boot.

But it has all been worth it! Vertical up certification brings with it that for horizontal and flat.

On Wednesday I will try to do a better version. Then I'll shift to vertical up with a MIG welder.

# Stick Vertical Up Visual Inspection Pass

Today I welded up some much better versions of the spiteful vertical up. My final version was nicely prepared: milk scale ground off, weld faces ground, tacked to 1/4" exact. The first 3/32" pass was fairly well done, the rods strategically burnt to have an uninterrupted stretch in the middle. The first 1/8" was done similarly. The 1/8" cover pass was pretty flat for the first half; the latter had a consistent lump up it. However, the cover pass width was good, and nowhere did the cover pass exceed height limits although it came right up to them.

Weldments going to a bend test should not be quenched, which can make the weld brittle. Since I used "recycled" pieces, someone might have quenched the metal in the past, which could create problems for me. Regardless, I left it outside the lab to cool in the air. The downside was that meant there would be no bend test for me today.

Our instructor, Mr. Caldwell, said about 90% of welds that pass the visual inspection pass the bend test. Certainly I hope mine does on Wednesday, because that would certify me, give me at least a B in the course, and let me start overhead certification with stick or shift to vertical up and overhead with MIG (GMAW).

Another reason I hope my weld passes is that I got a number of small scars today from sparks falling down inside my glove. :-/