Hydraulic/Electrical Interpolation - Siemens SINUMERIK 840D Description Of Functions

3 Start-Up
3.9 Fine adjustment and optimization
3.9.7

Hydraulic/electrical interpolation

Objective
Implementation
3-76
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Contour accuracy between hydraulic and electrical drives is achieved when the
drive dynamic response is set identically on the involved axes.
In addition to identical servo gain settings, it must be ensured that the step re-
sponse of the closed speed controller is "identical".
A velocity setpoint filter of the faster axis (e.g. electrical) must be set to the dif-
ference between the time constants of the closed velocity control loop (Tv, eqv).
T =Tv – Tv
filter , el eqv, hyd eqv, el
v
w
v
0.5
T
eqv, el
Fig. 3-25 Hydraulic/electrical interpolation
When Dynamic Stiffness Control (DSC) is active, the DSC function must be acti-
vated on all interpolating axes.
v
act, el
v
act, hyd
T
eqv, hyd
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02.99
t