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145
Service Manual – Condor
™
EcoFlex
™
, BR 1100/1300 EcoFlex
™
Wheel System, Traction
Functional Description
Overview
The traction wheel system includes the drive wheel assembly, Curtis A1 speed controller and associated
circuitry, drive wheel steering assembly and the drive pedal assembly
Drive Wheel Assembly
The 1 75 HP
Drive Motor Assembly
drives the
Poly Front Wheel
to
propel the machine
The
Drive Motor Assembly
has
four terminal connections; two
armature connections (
A1
and
A2
)
and two field connections (
F1
and
F2
) The speed controller provides
pulse-width-modulated (PWM)
voltage and current output to the
motor armature connections (
A1
and
A2
) to control the motor speed,
and changes the polarity to the
field connections (
F1
and
F2
) to
control the motor drive direction
Curtis A1 Speed Controller
The Curtis solid-state speed controller (A1) controls the speed and
direction of wheel drive motor according to the inputs it receives
from the A2 control board assembly The speed controller is
located to the left of the operator seat behind the electrical access
panel
The speed controller is programmed for two maximum speed
setting modes, M1max and M2max
•
The M1max is the transport speed mode and is set at 100% of
the total system’s speed potential
•
The M2max is the scrubbing speed mode and is set at 70% of
the total system’s speed potential
Note that both of the speed settings (M1 and M2) can be changed
(increased or decreased) from the original factory specifications
only by using the hand-held Curtis programmer Refer to the
Maintenance and Adjustments/Programming Vehicle Speed
Changes
section for instructions on using the programmer for
speed setting changes
Drive Motor
Assembly
Poly Front
Wheel
Curtis A1
Speed
Controller