52
Curtis 1230 Manual, Rev. C
6 — VEHICLE PERFORMANCE ADJUSTMENT
> Throttle), see pages 28–29. This procedure adjusts characteristics related to
the “feel” of the vehicle.
8-a. Speed (Speed Limit Type, M1/M2 Max Speed, M1/M2 Min
Speed). First, set the Speed Limit Type parameter to match the type of speed
limit input your application will use.
Two speed setpoints are set in each operating mode: the speed at full throttle
when the speed limit pot is in its highest position (Max Speed) and the speed
at full throttle when the speed limit pot is in its lowest position (Min Speed).
These parameters are set through experimentation. If the vehicle speed is
too fast, reduce the setting; if it is too slow, increase the setting.
8-b. Response to increased throttle (Throttle Map, M1/M2 Accel Rate).
Set the Throttle Map parameter to 50%. Drive the vehicle and adjust the Ac
-
cel Rate for the best overall response. If the vehicle starts too slowly under all
driving conditions, reduce the Accel Rate.
The throttle map can be adjusted if necessary to achieve the desired
control at low speeds. If the vehicle responds well for fast, full range throttle
transitions but is too jumpy during low speed maneuvering, reduce the Throttle
Map value; see Figure 14, page 29. On the other hand, if you want a faster,
more responsive feel at low throttle, increase the Throttle Map value.
8-c. Response to decreased throttle (M1/M2 Decel Rate). The way the
vehicle responds when the throttle is reduced or completely released is adjusted
using the Decel Rate parameter. First, set the Decel Rate based on the desired
time for the vehicle to stop upon release of throttle when traveling at full speed
with full load. If the vehicle brakes too abruptly when the throttle is released,
increase the Decel Rate.
8-d. Response to a new direction command (M1/M2 Brake Rate). The
way the vehicle responds when a new direction is selected is adjusted using the
Brake Rate parameter. First, set the Brake Rate based on the desired time for
the vehicle to stop upon selecting a new direction when traveling at full speed
with full load. If the vehicle brakes too abruptly when the new direction is
selected, increase the Brake Rate.
Note: Once a vehicle/motor/controller combination has been tuned, the pa
-
rameter values can be made standard for that system or vehicle model. Any
changes in the motor, the vehicle drive system, or the controller will require
that the system be tuned again to provide optimum performance.
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