On 01.11.12 18:40, Peter Blodow wrote: > How is the position of the balls rsp. the pendulum detected? > Peter
My guess is that the beam pivot has a servo motor and quadrature encoder. If the ball is off-center, then the beam pivots, unless sufficient restoring torque from the motor is applied. The amount of torque (current) required at any instant would then be a measure of ball position, if the beam is not accelerating, I figure. If the pendulum is constrained to one axis of rotation, then one encoder on the pivot is all that is needed there as well. Erik -- In the bathtub of history the truth is harder to hold than the soap, and much more difficult to find." - Terry Pratchett ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
