Hydraulic/Electrical Interpolation - Siemens Sinumerik 840D Series Function Manual

3 Startup
3.9 Fine adjustment and optimization
3.9.7

Hydraulic/electrical interpolation

Target
Implementation
3-74
Contour accuracy between hydraulic and electric drives is achieved when the
drive dynamic response is set identically on the axes involved.
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. electric) must be set to the differ-
ence 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
If dynamic stiffness control (DSC) is active, the DSC function must be activated
on all interpolating axes.
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
v
act, el
v
act, hyd
T
eqv, hyd
 Siemens AG, 2003. All rights reserved
02.99
10.03
t