24 Sep
2004
24 Sep
'04
3:55 p.m.
On Fri, 2004-09-24 at 16:27 -0400, Paul Koning wrote:
I was going to say that it does need to know what quadrant of the field
the ball is in so that it can return the ball to the centre position
after a point has been scored - but looking at the wiring diagram it's
actually cleverer than that (I'm having to learn German as I go, here).
All it does to return the ball is reverse polarity to the ball X/Y drive
motors when the ball goes out of play, and only stop each motor when it
reaches its respective centre line. Neat.
cheers,
Jules
>>>> "Vintage" == Vintage Computer Festival <vcf(a)siconic.com>
writes:
Vintage> "Element 2: The movements of ball and racquet, as well
as
Vintage> the collision detection take place in a metal chassis under
Vintage> the glass cover. Each moving game compoent has a mechanical
Vintage> counterpart, which is moved by electric motors. When these
Vintage> parts collide, contacts are closed and the relays in the
Vintage> computer switch the direction of rotation of the motors."
What I meant is that the relay control is not doing position
calculation. It doesn't know where the ball and paddles are (only
whether certain motors are turning).