64
Curtis 1244 Manual, Rev. E
➆-B Forward-to-Reverse Transitions
1. Begin this test set with the Taper Rate parameter set to 64. Drive
the vehicle and transition directly from forward to reverse. A
slight pause should be noticeable at the zero speed point. Reduce
the Taper Rate parameter value until the pause is eliminated.
Reducing the Taper Rate value further may cause a slight bump
during the direction transition.
2. If the transition is slow or the vehicle feels sluggish: reduce the
Accel Rate parameter value.
3. If the vehicle exhibits a small bump at zero speed: increase the
Taper Rate parameter value.
➆-C Low Speed vs. High Speed Braking
e 1244 controller is capable of both regenerative and plug
braking, and can be programmed to use one or the other as a
function of vehicle speed. Plug braking provides quicker response
and direction transition at low speeds, while regen braking is
more powerful and efficient at high speeds. e Regen Speed
parameter is used to define the threshold vehicle speed at which
the type of braking changes from one to the other.
To determine the ideal Regen Speed parameter for your applica-
tion, jockey the vehicle back and forth from forward to reverse
at low speeds. Increase the Regen Speed parameter value until
the vehicle feels more responsive during the direction changes.
en drive the vehicle at high speed and test the braking. If the
braking feels weak, reduce the Regen Speed parameter value.
e Regen Speed parameter can be adjusted from 0% to 100%
of the vehicle speed. In other words, the point at which the
controller enables regen braking can be set anywhere within the
vehicle’s entire speed range. However, setting the Regen Speed
parameter to a high percentage of the maximum vehicle speed
will result in weak braking at high speeds along with increased
motor heating. Additionally, no energy will be returned to the
batteries to extend the total charge time and the motor brush
wear will be higher than if regen braking is used. Typical Regen
Speed values are between 10% and 60% of the maximum vehicle
speed.
6 — VEHICLE PERFORMANCE ADJUSTMENT
To Next Page
Loading...
