Invacare MK5 NX-80 ELECTRONICS - SERVICE SECTION 4: CONTROL MODULE CALIBRATION; When Calibration is Needed; Key Calibration Functions

MK5
™
NX
™
- 80 ELECTRONICS 8-14 Part No. 1122140
IV.IV.
IV.IV.
IV.
CALIBRATION OF THE CONTROL MODULECALIBRATION OF THE CONTROL MODULE
CALIBRATION OF THE CONTROL MODULECALIBRATION OF THE CONTROL MODULE
CALIBRATION OF THE CONTROL MODULE
The control module is fully calibrated at the factory and will not need further calibration
by the dealer except when replacing the control module or the joystick with one that
has not been matched to the chair.
The available calibration functions are the battery discharge indicator (BDI), the left and
right motor balance (BAL) for veer correction and the motor lock release time. Only
calibration of the Battery Discharge Indicator requires the use of any test equipment.
Select CALIBRATIONS from the main menu to display the first functions in the calibra-
tion menu. Use the  and  keys to select the calibration function desired. The SE-
LECT key will display the current calibration value and permit modification of the
control module calibration. Always press SAVE after calibration changes are made.
Calibrations are saved to all drive programs, so no selection of a DRIVE is necessary.
BATTERY LEVEL - Measure the battery voltage with a digital voltmeter. Press the
SELECT key to display the current battery voltage value. Use the and  keys to
calibrate the display to match the volt meter reading.
MOTOR BALANCE - BALANCE corrects for veer when going straight on level
ground. Veer is corrected by increasing or decreasing the voltage applied to the left
motor as a percentage of that applied to the right motor. Use the  key to correct for
veer to the right and the  key for veer to the left.
BRAKE TIME-OUT - The BRAKE TIME-OUT function determines the elapsed time
for the motor locks to engage after the driver control is brought to neutral. The time
displayed is in seconds. Use the  key to increase the release time and the  key to
decrease the release time.
DRIVE CONFIG. - Drive Configuration is used to match the control to the type of
chair being driven. The available selections CWD (center wheel drive) and RWD (rear
wheel drive). Use the  or  keys to select the type of chair being driven. The follow-
ing defines differences between chairs to provide the optimum performance:
CWD - switches motor outputs without switching motor connectors and turning speed
is modified to improve driving feel and control.
RWD - operates normally for rear wheel drive chairs.
SOFT START - Soft Start controls the chair response to proportional joystick dis-
placement. With Soft Start ON, small movements around neutral do not produce large
speed changes. Beyond 40% of joystick throw, the response is greater. When Soft Start
is OFF, joystick displacement will produce a linear speed increase.
SERVICE SECTION IV
CALIBRATION OF THE
CONTROL MODULE
CALIBRATION OF THE CONTROL MODULE