On Sunday 12 July 2020 20:14:57 Chris Albertson wrote: > I would not be surprised at all. > > "Everyone" uses the Right-Hand Rule. Using your right-hand curl your > fingers and point your thumb up. The thump is the positive > direction of the axis and the fingers point in the positive direction > of rotation. > > They call it "right hand" but I think they (long-forgotten ancient > mathematician) actually used the Earth as the convention for which way > is positive and the fingers trick was discovered later by some math > teacher. The convention is so that plants spin and their rotations > around the sun go "forward" if you assume North is "up" > > Even wood screws are like this, turn then in the negative direction > and they sink down into the wood. But rotate in positive direction if > you unscrew them. > > I think students first learn this in trigonometry class in high > school, then again in the first physics class then again > [image: 220px-Right-hand_grip_rule.svg.png] > (above from Wikipedia)
Both of which I missed, I quit school to go fix tv's for a living, at about 14 yo. The rest is history. Some of it quite old now, like me. > On Sun, Jul 12, 2020 at 4:23 PM Gene Heskett <[email protected]> wrote: > > Greetings all; > > > > My first foray into using polar co-ords to do a couple of bolt > > circles worked well, but I was mildly surprised to find that an > > increased angle went CCW around the circle on my GO704. > > > > Is this intentional?, or do I have something miss-configured? > > > > Thanks. > > > > Cheers, Gene Heskett > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > If we desire respect for the law, we must first make the law > > respectable. - Louis D. Brandeis > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
