Autopilot system calibration 6 Vehicles
Pre-calibration steps
1. Complete the vehicle setup steps.
2. Perform calibration for the Automated Deadzone. See Automated steering deadzone
calibration, 156. before you perform the calibration for steering gain.
3. Drive the vehicle to an open area with a smooth surface.
CAUTION – The wheels can move abruptly during the Steering Proportional Gain procedure while the Autopilot
system tests the hydraulic response to its steering commands. To avoid injury, be prepared for vehicle movement.
Calibration steps
1. At the Vehicle setup panel, select the vehicle you want to work with. See Select a vehicle, 145.
2. Tap Calibrate, then tap Steering Proportional Gain. The calibration tool displays.
3. Tap Run Slew Test. To proceed with the test, tapNext.
4. Drive forward at 1 mph (1.6 kph)or faster. TapNext.
5. Turn the front wheels completely to the right and then tap Turn Left. Drive forward while the
vehicle turns left, until the screen shows the test is complete.
6. Turn the front wheels completely to the left and then tap Turn Right. Drive forward while the
vehicle turns right, until the screen shows the test is complete.
Note – With some vehicles, valve size and hydraulic capabilities of the machine will limit the
slew time. In such cases, optimizing the P-gain value will be difficult..
7. Note the Slew Time and Overshoot values.
8. Adjust the gain value.
9. Repeat step 3 through step 8 until the Gain is just below the level where any one of the
following occurs:
ll Slew times no longer decrease (a low value is required some vehicles too high gain is
possible - 1500-2000 miliseconds is ideal).
l Overshoot exceeds 5 – 8% (depending on the vehicle).
l Wheels noticeably shake near end stops.
10.
When you find the optimum gain, tap to accept the calibration or to exit without saving.
The display returns to the CALIBRATION section where you can perform another calibration or
exit.
Version 1.075, Revision C TMX-2050 Display User Guide 161
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