32
Curtis 1228 Manual, Rev. F
4 — INITIAL SETUP
and repeat the procedure from Step 2-b until the Throttle % is zero at the
electromagnetic brake disengagement point.
2-d. While observing the Throttle % value displayed in the programmer’s
Monitor Menu, continue to increase the throttle past the electromagnetic brake
disengagement 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 moved further than desired before the Throttle % value
began to increase, the throttle deadband parameter must be decreased. In the
Parameters Menu, scroll down to the THRTL DEADBAND field, and enter a smaller
THRTL DEADBAND value. Select the Monitor Menu and repeat the procedure from
Step 2-b. When the amount of travel between the point at which the brake
is disengaged and the Throttle % value begins to increase is acceptable, the
throttle deadband is properly tuned.
2-e. If a bidirectional (wigwag) throttle assembly is being used, the pro-
cedure should be repeated for the reverse direction. The
THRTL DEADBAND value
should be selected such that the throttle operates correctly in both forward
and reverse.
Tuning the Throttle Gain
2-f. Apply full throttle and observe the Throttle % value. This value
should be 100%. If it is less than 100%, the throttle gain must be increased
to attain full controller output at the maximum throttle position. Select the
Parameters Menu, scroll down to the THROTTLE GAIN field, and enter a larger
THROTTLE GAIN value. Select the Monitor Menu and repeat this step until the
Throttle % value is 100%.
2-g. Now that the full throttle position results in a 100% value for
Throttle %, slowly reduce throttle until the Throttle % value drops below
100% and note the throttle position. This represents the extra range of mo
-
tion allowed by the throttle mechanism. If this range is large, you may wish
to decrease it by decreasing the throttle gain. This will provide a larger active
throttle range and more vehicle control. Select the Parameters Menu, scroll
down to the
THROTTLE GAIN field, and enter a smaller THROTTLE GAIN value. Select
the Monitor Menu and repeat this step until an appropriate amount of extra
range is attained.
2-h. If a wigwag throttle is being used, repeat the procedure for the re-
verse direction. The
THROTTLE GAIN value should be selected such that the throttle
operates correctly in both forward and reverse.
Confirming proper throttle operation
Select a direction and operate the throttle. The motor should begin to
turn in the selected direction. If it does not, verify the wiring to the throttle
and motor. The motor should run proportionally faster with increasing throttle.
If not, refer to Section 7.
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