Thanks and it slowed down from merely vibrating to actually moving a tiny amount forward. But then it just moves itself back, then forward...just like in other stepper post today.
It sure seems like it moves forward and then there is some kind of reset/direction change sideeffect or something. Me very inexperienced at this, but it sure seems like the hardware is following somekind of instructions that I don't know about.
Note that I'm not using any library and this is the first time in my life I've read a chip datasheet. Who knows what I missed or misunderstood.
My life is being ruined by this obsession! I may change the whole damn thing to bicycle powered! I know chains and sprockets.
Help. It will be so simple, yes?