Figure 17: Braking Response Rate - Kohler Curtis F Series Manual

Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022
Figure 17
Braking Response Rate
Diagram. In this example,
HS = 70 %,
LS = 30 %,
Typical Max Speed = 5000 rpm
PARAMETER
Restraint Forward
Restraint_Forward_SpdM
0x3847 0x00
Restraint Back
Restraint_Back_SpdM
0x3846 0x00
Soft Stop Speed
Soft_Stop_Speed
0x384B 0x00
pg. 56
FASTER
BRAKE RATE
(seconds)
Full Brake Rate HS = 1.5
Full Brake Rate LS = 3.0
Low Brake Rate = 20.0
(LS x Typical_Max_Speed)
= 30% x 5000 rpm = 1500
SPEED MODE — RESTRAINT MENU
ALLOWABLE RANGE DEFAULT
0 – 100 % 50 %
0 – 32767
0 – 100 % 50 %
0 – 32767
0 – 500 rpm 0 rpm
0 – 500
MOTOR SPEED
LOW SPEED HIGH SPEED
(HS x Typical_Max_Speed)
= 70% x 5000 rpm = 3500
DESCRIPTION
Increases torque when on a steep hill in order to limit roll-forward
speed. Setting this parameter too high may cause oscillations in
the motor as it attempts to limit the roll-forward speed.
Increases torque when on a steep hill in order to limit rollback
speed. Setting this parameter too high may cause oscillations in
the motor as it attempts to limit the rollback speed.
Defines the speed below which a much slower decel rate is used.
A setting of zero disables the function. Note: This parameter
works only in Speed Mode and Speed Mode Express.
Soft Stop Speed is useful for vehicles that have fast deceleration
and vehicles operating on ramps using the Position Hold function.
With vehicles that have fast deceleration the driver may find the
final speed reduction to zero rpm uncomfortable (disconcerting);
the vehicle may even rock back due to tire wind-up. The Soft
Stop Speed parameter allows the vehicle to slow at the same
fast rate until it reaches the set threshold at which point it
changes to a slower (softer) deceleration rate. However if the
threshold is set too high the vehicle will feel like it is running on
(also disconcerting).
When releasing the throttle on a ramp the vehicle may roll back
before Position Hold takes control. Use the Soft Stop Speed to
reduce the amount of rollback, but do not set it so high that the
vehicle drives up the ramp after the throttle is released.
4 — PROGRAMMABLE PARAMETERS
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100% Brake
1% Brake
FASTER
TYPICAL MAX
SPEED