Setcover 🇺🇦📯

⬇️Wissen, dass ich gerne verbreiten möchte. Eine Mischung aus Lebenserfahrungen, Today I Learned (#TIL) und etwas Mathematik. Zusatz zu meiner Bio: Ich war ehrenamtlich in Koop. m. Pol. 🇨🇭 im Bereich Verkehrserziehung Fahrrad f. Kinder / Jugendliche tätig (incl. Ausbildung).

@byte_thrasher Sorry, I forgot the last step: 99.) Realize you could have bought several new granite surface plates for the money you spend. I don't think I will reach this step any time soon. 🤓👍

@byte_thrasher I hope my guide is of great use to you. I tested it myself. I am currently at step No. 12 (waiting for delivery) but No. 10 was great fun too.🤣😭 (The video is not sped up! That's my twist gage; my fiancée touched it with her warm hands for just a few seconds.)

@LukyMSant @MyLordBebo Germany: labeling is mandatory, according to VDE but so is checking if deenergized and securing against reactivation

@MyLordBebo Is it against the law or something, to just place a sticker with each room's name?

There are two ways doing electric testing … also testing if the breaker works correctly

@gak_pdx @agentdavo @greg_f_miller I think the classical fringe reading is still the go-to solution. The orange dot is roughly at 1/4 of the orange line, so add 1/8 wavelength to the 1/2 wavelength one got by counting fringes. 5/8 * 520 nm ≈ 325 nm 🤷

@gak_pdx @agentdavo @greg_f_miller Get a Keyence VK-X3000 or ask Zeiss i'd guess. Or just use FringeXP without the image editing and draw the fringes by hand (if auto trace does not work).🤷 I would expect such kind of analysis when grinding mirrors or as final inspection for commercial optical flats.

Each step down the precision rabbit hole tells you how bad you were at the previous steps: - Grinding shows you are a mediocre machinist. - Lapping shows your grinding sucks. - Metrology to the sub µm shows you to be a garbage human and there is no truth in the world.

@gak_pdx @agentdavo @greg_f_miller And DFTFringe without prior image editing, contrast enhancing and gaussian blur is completely useless. Fast but useless. 🤣

@gak_pdx @agentdavo @greg_f_miller DFTFringe does not play well with the interferogram (fringe image) i uploaded here. 😂🤣 (but the complete DFTFringe workflow took me less than 10 seconds🙃)