Wesley BCT-6200-6SA - Manual (Page 71)

Curtis 1243
GEN
2 Manual, Rev. B 63
5 — VEHICLE PERFORMANCE ADJUSTMENT
STEP
2. The default Restraint setting (5 amps) should work well for most
vehicles. If the vehicle exhibits excessive overspeed when driving
down a ramp, increase the Restraint value. If the vehicle “speed
hunts” while driving down a ramp or brakes too abruptly at low
or released throttle, decrease the Restraint value.
STEP
3. If the Restraint value has been adjusted, retest braking behavior
when throttle is reduced to ensure that it still has the desired feel.
If it does not, the Decel Rate should be re-adjusted as in Step 1.
6 Response to Increased Throttle
The way the vehicle reacts to quick or slow increased throttle requests can be
modified using the Accel Rate, Current Ratio, Quick Start, and Throttle Map
parameters. Optimal vehicle response is tuned by adjusting these parameters
and then accelerating the vehicle from a dead stop under various throttle tran-
sition conditions.
STEP
1. Set Quick Start = 0 and Throttle Map = 50%.
STEP
2. Drive the vehicle and adjust the Accel Rate for the best overall
response. If the vehicle starts too slowly under all driving condi-
tions, the Accel Rate should be reduced.
STEP
3. Increasing vehicle acceleration. If acceleration feels good for slow
or moderate throttle transitions but the vehicle initially starts
too slowly, set the Current Ratio parameter to 2 or higher. If
the vehicle does not accelerate as quickly as desired when the
throttle is transitioned quickly from zero to full speed, increase
the Quick Start parameter value to obtain the desired fast throttle
response.
STEP
4. Achieving better 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 and/or
set the Current Ratio to 1. If these adjustments are insufficient,
decrease the Quick Start parameter value to obtain the desired
precision maneuvering.
7 Smoothness of Direction Transitions
Additional fine tuning can be performed to enhance the vehicle’s transitions
between braking and driving, after the major performance and responsiveness
tuning—1 through 6 above—has been completed.
STEP
1. Ensure that the Braking Current Limit and Braking Rate param-
eters have been set for the desired response (see Section 3, pages
23 and 24).