Curtis PMC 1297 Manual
68
Preliminary on Verso page is set with right edge at 7 and 7/8,
and the top (as on the Recto page) at 1/4.
5 — VEHICLE PERFORMANCE ADJUSTMENT: Traction Tuning
range of the throttle mechanism to allow for throttle resistance variations over
time and temperature as well as variations in the tolerance of potentiometer
values between individual throttle mechanisms.
➀
-A Tuning the Throttle Deadband
STEP
1. Jack the vehicle wheels up off the ground so that they spin freely.
STEP
2. Plug the 13XX programmer into the controller, and turn on the
keyswitch. If your application has an interlock switch, close it.
STEP
3. When the programmer instructs you to select a menu, select the
Test Menu. The Throttle % parameter should be visible in the
initial display. You will need to reference the value displayed here.
STEP
4. Scroll down until the Forward Input parameter is visible. The
display should indicate that the forward switch is Off.
STEP
5. Slowly rotate the throttle forward until the display indicates that
the forward switch is On. Use care with this step as it is important
to identify the threshold throttle position at which the forward
switch is engaged and the controller recognizes the forward
command.
STEP
6. Without moving the throttle, scroll up to display the Throttle %
parameter and read the value shown. This value should be zero.
If the Throttle % value is zero, proceed to Step 7. If it is greater
than zero, the Throttle Deadband must be increased. Select the
Program Menu and enter a higher value for the Throttle Deadband.
Repeat Steps 5 and 6 until the Throttle % is zero at the forward
direction engagement point.
STEP
7. While observing the Throttle % value in the programmer’s Test
Menu, continue to rotate the throttle past the forward switch
engagement point. Note where the Throttle % value begins to
increase, indicating that the controller has begun to supply drive
power to the motor. If the throttle had to be rotated further than
desired before the Throttle % value began to increase, the Throttle
Deadband must be decreased and the procedure repeated from
Step 5. If the amount of rotation between the point at which the
forward switch is engaged and the Throttle % value begins to
increase is acceptable, the Throttle Deadband is properly tuned.
STEP
8. If a bidirectional (wigwag) throttle assembly is being used, the
procedure should be repeated for the reverse direction. The
Throttle Deadband value should be selected such that the throttle
operates correctly in both forward and reverse.
