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Performing Automatic Actuator Calibration on K450
Due to the unique position the K450’s seat positioning mechanism must be in to provide access to the
actuator fasteners, when a new actuator is being installed the actuator ram must be manually extended,
by rotating it by hand, to match the seat’s position. This effectively “breaks” the calibrated position between
the actuator’s position sensor and the actuator’s actual length.
However, each actuator fitted to the K450 contains a special type of position sensor that will re-align its
position information when the actuator is allowed to run from one physical end stop to the other. Since the
ICS controller does not normally allow each actuator to make a “hard stop” at each physical end stop, it is
necessary to enter a special mode that will allow this movement.
Therefore, when one or more of the actuators on the K450 are replaced, it is necessary to perform an
actuator calibration so that the actuator position sensors will communicate the correct positions to the ICS
seating control system.
There are two ways to perform the calibration, the automatic mode is suggested and preferred.
Using Automatic Calibration:
1.
Press and hold buttons 6 and 8 on the ICS Switchbox while turning on the wheelchair.
2. Once all the LEDs on the ICS Switchbox show in a green toggling pattern, release the buttons.
3. Begin the automatic calibration by activating button 8 on the ICS Switchbox.
4. Once button 8 is activated, the ICS will move the seating system in a specific sequence to make all
the actuators reach both ends of travel – completing the calibration.
The automatic movement sequence consists of five “steps”:
a) Tilt actuator moves fully in (completely un-tilted.) Once the ICS confirms the tilt actuator sensor gives
a fully in reading, Switchbox LED 1 turns green.
b) Then, all actuators will move to their fully out positions (Full Tilt, Full Elevator, Terra fully away from
floor.) Once the ICS confirms these positions, Switchbox LED 2 turns green.
c) Once all actuators have reached their fully out positions, the Tilt actuator is moved inwards and the
Terra moves down. After the Tilt sensor shows the tilt is less than 10°, Switchbox LED 3 turns green.
d) The Terra actuator continues to move down (towards the floor.) Once it is fully down, the ICS
confirms its lowest position and Switchbox LED 4 turns green.
e) Then, the Terra actuator will move up and the Seat Elevator will move to its lowest position. Once
the Seat Elevator is at its lowest position, the R-net Joystick will give a “calibration passed beep”
(beep-beep-beep-beep-beeeeeeep) to confirm that calibration has been completed successfully. All
of the LEDs on the ICS Switchbox will flash green also.
5.
Once the calibration passed beep is heard, turn the chair off then back on. The ICS switchbox will show
a red toggling flash (asking for a system restart), turn the chair off again. When the chair is turned on,
normal functionality is restored.
Programming K450 - Specific Attributes
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