Spool Calibration Overview - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW
Valve calibration shall be done when the PVED-CLS is in service mode, either
.
9.2.2

Spool calibration overview

(P3162)
Flow range
P3162 and P3164 define the maximum spool stroke and are set to the stroke length where the spool is mechanically
stopped by the valve. P3162 and P3164 is usually not calibrated.
P3166 and P3168 define the closed-loop dead-band spool positions known to the software.
Parameter P3170 is a spool position offset which is added/subtracted (P1 and P2) to the spool position set-points in
open-loop only. P3170 is usually not calibrated per machine, but designed by the integrator as a fixed value, for each
application or potentially for each application models.
Closed-loop mode
(P3166)
Open-loop mode
P1
L Hydraulic deadband
P1: (P3166 + P3170)
P2: (P3168 - P3170)
Flow, Q
(L/min)
(P3088)
Maximum flow
(P3168)
P2
R
Figure 19
(P3164)
Spool displacement
Flow range