What is G90? Let me tell ya somethin’ about this G90 thing.
You know, when I was young, we didn’t have all these fancy machines. Now they got these things called CNC machines, sound like somethin’ from outer space, I tell ya. And in them machines, they got these codes, like secret languages. One of them codes is called G90.
G90, what is it? Well, it’s like this. It tells the machine where to go, see? It’s about them positions, where things gotta be. Like when you tellin’ someone where to plant the corn, you ain’t just sayin’ “over there,” you gotta be specific. G90, it’s bein’ specific.
This G90, they call it absolute positionin’. What’s that mean? It means everything’s from a startin’ point, you know, like the corner of the field. Everything’s measured from that spot. So, if you say “go to 10, 5”, it means go 10 steps this way and 5 steps that way from that corner, not from where you just were. Understand?
It’s not like, “Oh, take two steps from where you are now.” Naw, it’s always from that special startin’ point. That’s what they call “absolute”. Always from the same spot, no matter what. Like when you measurin’ cloth, you always start from the edge, right? Not from some random wrinkle in the middle.
- G90 means absolute positionin’.
- It’s like a startin’ point for the machine.
- Every move is measured from that startin’ point.
They say it’s like that battleship game. You remember that game? You gotta guess where the other fella’s ships are. Each spot has its own name, like A1, B5, and so on. G90 is like that, every spot got its own special address from the start.
Now, there’s another code, G91. That one’s different. That one’s like, “take two steps from where you are now.” But we ain’t talkin’ ’bout G91 today, we talkin’ ‘bout G90.
So when they use this G90 in them CNC machines, they punchin’ in the numbers, and the machine, it follows them numbers, always goin’ back to that startin’ point. It’s like plowin’ a field, you always go back to the edge before startin’ a new row. Otherwise, you’d end up with crooked rows, and nobody wants crooked rows, right?
This G90, it helps the machines make things right. You know, like when they makin’ parts for cars or whatever. Gotta be precise, gotta be exact. Can’t be guessin’, can’t be “close enough.” Gotta be spot on, like hittin’ the nail right on the head.
So, in simple words, G90 is a code that tells the machine to use absolute positionin’, which means measurin’ everything from a fixed startin’ point. It’s like givin’ the machine a map and sayin’, “Go here, then go there, but always measure from this spot.” It ain’t rocket science, but it sure is important for makin’ things right.
I heard someone talkin’ about unlockin’ a bootloader. They also mentioned G90 and said somethin’ about typin’ in “fastboot flashin’ unlock” command. I don’t know what that means, but that G90 code shows up in a lot of places, not just them CNC machines, seems like.
And when they programmin’ this G90, they use letters like X, Y, Z. Don’t ask me what they mean, it’s just how them machines understand things. Just like when you tellin’ a horse to go “gee” and “haw”, it’s a language, right? Well, X, Y, Z, that’s the machine’s language. And G90 tells the machine how to understand them X, Y, Z commands—absolute, remember?
Some folks say CNC machinin’ is complicated, but when you break it down, it ain’t so bad. It’s all about tellin’ the machine what to do, and G90 is just one way of doin’ that. It’s about bein’ clear, bein’ precise, and makin’ sure things are done right from the very start.
So, next time you hear someone talkin’ ’bout G90, you’ll know it’s all about tellin’ the machine where to go, startin’ from the same spot every time. It’s about bein’ accurate, just like plantin’ them seeds in a straight line.
