Orbital shaker

Details Orbital shaker Orbital shaker

B - Operations, Transporting

01

F

74/15, 341/71, 3

B01F 11/00 (2006.01) B01F 15/00 (2006.01) G01P 3/489 (2006.01) H02P 5/00 (2006.01) H02P 23/00 (2006.01)

Patent

CA 1278072

ORBITAL SHAKER Abstract of the Disclosure An orbital shaker apparatus which has a tray for cyclic motion is flexibly suspended from a frame which is flexibly suspended from a plurality of stationary supports. The flexible suspension constrains the tray to move only translationally along one axis with respect to the frame and constrains the frame to move only translationally along one axis perpendicular to the tray movement axis. A microprocessor is used for receiving operator input to set the speed and duration of the cyclic motion. Embodied in the microprocessor is a closed loop speed control which measures the actual speed of the cyclic movement from an interrupt routine which calculates the duration between the pulses of an optoelectric speed sensor. The actual speed is compared to the set speed and a digital "bang-bang" control signal is generated to regulate motor velocity from the difference between the two speeds.

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