MTS Series 793 Utility Software - Manual (Page 31)

For three-stage servovalves, the mechanical valve balance procedure involves the procedure for
the pilot spool (which is the same as the procedure for two-stage servovalves), and a procedure
to adjust the LVDT mechanical null for the third-stage spool. These procedures are included in
the Series 256 Servovalve Product Manual (PN 011-209-602), which is typically included in the
system documentation set.
Electrical valve-balance and inner-loop tuning procedures
Electrical valve balance procedures and inner-loop tuning procedures for three-stage servovalves
are included in the Series 793 Tuning and Calibration manual (PN 100-147-134).
MTS Series 793 Utility Software 17
Create and Edit an HWI File