Re: [CAD_CAM_EDM_DRO] Re: RE: more R,P,Y axis conventions (rotary)

----- Original Message -----
From: <ballendo@...>

> Right hand rule: First, you'll notice I haven't stated the "right
> hand" part of the right hand rule! That's because I have always found
> the text descriptions puzzling!

The "right hand" in Right Hand Rule is probably a human factors thing, as I
learned during my first physics exam in college. All my calculations were
correct, yet the answers were intuitively backward. I looked at my hand,
checked my work, looked at my hand again, checked my work again - still
backward. I looked up and noticed the instructor trying to hold back the
laughter. I had my pencil in my right hand and was using the left hand for
determining the axes. For some reason, there is a tendency to go clockwise
when using the left hand and that was my problem.

Another reason for using the right hand is that the big finger represents
the B field and the "fumb" represents the F field (or something like that -
it was a long time ago) in electromagnetic stuff. It would be reversed on
the left hand.

Doug