Wesley BCT-6200-6SA - Manual (Page 68)

Curtis 1243
GEN
2 Manual, Rev. B 60
5 — VEHICLE PERFORMANCE ADJUSTMENT
3 Setting the Vehicle’s Unloaded Top Speed
The controller and vehicle should be configured as follows prior to setting the
maximum unloaded vehicle speed:
• Max Speed = 100%, all modes
• Drive Current Limit as established in tuning procedure 2
• Field Map = 50%
• Field Map Start = 50% of the specified drive current limit
• Field Min = manufacturer’s specified minimum (if available);
otherwise, 3 amps
• Load Comp = 0
• The vehicle should be unloaded
• The vehicle battery should be fully charged.
The vehicle should be driven on a flat surface in a clear area during this proce-
dure. Since the vehicle may initially be traveling at speeds in excess of the final
intended speed, precautions should be taken to ensure safety of test personnel
and anyone in the test area.
STEP
1. Select the programmer’s Program Menu and scroll down until
the Field Min parameter is at the top of the display.
STEP
2. Power up the vehicle and apply full throttle. While driving the
vehicle with full throttle applied, adjust the Field Min parameter
value to set the desired top speed. Increasing the Field Min value
decreases the vehicle’s top speed; decreasing the Field Min value
increases the vehicle’s top speed.
CAUTION: Do not decrease the
Field Min parameter value below the motor manufacturer’s rec-
ommended minimum field current value, and do not increase
it above 10 amps.
STEP
3. If the Field Min parameter value is increased to 10 amps and
the vehicle’s top speed has still not been sufficiently reduced,
the Max Speed parameter should be used to bring the vehicle
top speed down to the desired level. First, decrease the Field
Min parameter value, setting it to optimize smooth starting.
Then adjust the Max Speed parameter per Step 4 to bring the
vehicle top speed down to the desired level.
NOTE
: If the Field
Min parameter is set too high, the high initial torque created
by the high field current may cause overly abrupt starts; this is
why we recommend using the Max Speed parameter in those
cases where a moderate Field Min setting does not sufficiently
reduce the vehicle top speed.
STEP
4. Scroll up the Program Menu until the Max Speed parameter is
at the top of the display. While driving the vehicle with the Field
Min set at the value selected in Step 3, decrease the Max Speed
parameter value until the desired vehicle top speed is set.