Calibration Procedure - Danfoss PVED-CLS User Manual

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Calibration procedure

The following steps describes a calibration procedure, which can be obtained or could be implemented in a service tool.
Refer Figure 69 for below steps.
1.
The calibration operator inputs two initial experimental main spool set-points S1 and S2 which the calibration
algorithm alternates between.
2.
The starting point for the measurement is when the steered wheel angle is at Calib_WA_L.
3.
The calibration algorithm applies main spool set-point S1 to initiate a steering direction towards right.
4.
The time T1 it takes for the steered wheels to reach Calib_WA_R is measured and denoted TR.
5.
When the steered wheels reaches Calib_WA_R, the calibration algorithm applies main spool set-point S2 to
initiate a steering direction towards left.
6.
The time T2 it takes for the steered wheels to reach Calib_WA_L is measured and denoted TL.
7.
The calibration operator continuously evaluates TR and TL and stepwise increases or decreases the spool set-
points S1 and S2.
8.
Repeat from step 3 until TR and TL meets the success criteria described in section 17.6.5.2 and shown as T3
and T4).
178 | © Danfoss | August 2018
Figure 69
AQ00000211