REXROTH VT-VRPD-2 Start-Up And Operation page 28

RE 30126-01-B/08.07 | Manual Hydraulics | Bosch Rexroth AG 28/76
Application: Valve control for the 4WRE6 / 4WRE10 3
Fig. 12 Plot - Gamma
If Type 2 is selected for the Curve correction linearization of the valve can be
Curve correction – Type 2
achieved by entering individual value pairs.
Overlap compensation is used for linearizing of valves with a positive overlap. This will
Overlap
correct the control value (valve setpoint). The value in the entryfield Step +/Step – is
added to the control value. The step can be specified differently depending on the
sign of the control value.
If this control value lies within the „Deadband" a value is output which closes the
overlapped valve in defined fashion if Step +/Step – has been correctly selected.
The result for the following settings is shown in the illustration below:
Step+ = 30%,
Step- = 20% and
Deadband = 10%.
The time base is set to 500ms.