86©2006 Sunrise Medical
SEATING SECTION
Theory of Operation
The Recline Portion of the Perfect Fit Seating System
uses dual keipers to operate the back. Each keiper is
powered by independent 24 VDC motors. A cogged
belt connects the motors to the keipers.
The keipers are similar to those used in the automobile
industry to recline seat backs. A hinged rod
connects the left keiper to the right keiper to ensure
synchronization.
An optical encoder is mounted on the left keiper
assembly to record the rotation of the keipers. The
control module decodes this signal and calculates the
back angle.
A conventional joystick, or other input device, sends
actuator commands over the CANBUS line to the
control module. If a QR-MAC is also incorporated, the
commands are routed to it as well. The control module
or QR-MAC sends operating voltage to a PC board
mounted on the seat back.
The Perfect Fit System
Fig 3.48
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