How to recalibrate the squareness of your L-ruler
by PorkyPain
How to recalibrate the squareness of your L-ruler
by PorkyPain
44 Comments
Wuuuuuuuuuut
Mathemagics
L ruler? Jeez. Nobody calls it that.
Its called a “square”
How does this work?
The metal is still slightly malleable, like playdough.
Hitting the corner on the outside half of the corner micro-squishes the angle to close a little.
Hitting the corner on the inside half of the corner micro-squishes the angle to open it a little.
How does the tap thing fix it though?
How did he learn this?
That’s clever. I’m guessing by punching it there it expands the metal just enough to push the two legs of the L “inwards”.
Talk about meeting on the square! Heh heh…I’ll…I’ll just go now..sorry….
What? No way. Fuck sake
How would the square get out of square in the first place? Easy. We all have done it. Mostly by dropping it on the ground after using it. Especially if you’re up on a roof.
I was asked last week why I was destroying my L-ruler by doing the same.
I told my coworker to go look at all the other L-rulers in the shop for the same punctured marks. Only two more people at work know this trick besides me and the boss.
Sorcery
Hitting things makes them work good. Got it.
I have one of these that I know is just like that. But I don’t understand why it is like that in the first place
I’ve used that method with flat framing squares but I’ve never had any problems with my Woodpeckers framing square!
It doesn’t sound backwards… the metal expands and pushes it “in”. Pretty logical really.
Finally. My Ls been like this for years.
[https://www.youtube.com/@Sheetmetalsamurai](https://www.youtube.com/@Sheetmetalsamurai)
Shoutout to this guy, his channel is fucking amazing if you are into any kind of metal fab. He shows you the mathematic side, and the heuristic side of how to make things.
Brilliant. Well done.
Mathemagicians
Fuckin shop voodoo
Nice
Kewl
This is why I’m on reddit
But… I only have **one** ‘L-ruler’
What? No waaayyy.
But I need a 2nd L-ruler. What if I only have one?
This is legit useful!
This video concerned me. If such a small hit can make the angle change so much, then how often are metal objects in general bending like that without anyone noticing it?
Thank you for squaring the square
This guy knows bodywork and metal fab.
Practical Applications of the Pythagorean Theorem:
L-ruler? It’s called a square and he even says it in the video
No, just get a new one…
Draw a line between the corners, the midpoint of that line is the pivot for adjusting.
You cannot just punch anywhere, the closer to the edge the more adjustment, putting a punch at that midpoint of the line between the two corners would theoretically do nothing but impart spreading pressure of that line(chord). If that line equally so it would not bend one way or the other. Looks like you could only calibrate so much before running out of usable punching space, but honestly after three or more punches maybe getting a new one.
Thats what I see from this video.
