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C
6
HAPTER
DOWN SPEED RATIO
Because of different flow restrictions and the affect of gravity, booms generally lower faster than the raise for the
same change in control effort. Down speed ratio accounts for this difference.
1. Select Diagnostics.
2. Select Tests.
3. Select Target Velocity Test.
FIGURE 3. Target Velocity Test
4. Press Begin Test.
5. Set the Target Velocity to -2° per second.
6. Raise the center rack and tilt one boom so the boom is approximately 5° above horizontal.
7. Press Start Test. The boom should lower. When the test is complete, the average velocity will display.
8. Press the Settings (small gear) on the tab.
9. If the boom moved faster than the desired 2° per second, decrease the Down Speed Ratio. If the boom moved
slower than the desired 2° per second, increase the Down Speed Ratio value.
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New Holland AutoBoom XRT Calibration & Operation Manual
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