Siemens Sinumerik 840D Series Function Manual

10.03
3.9 Fine adjustment and optimization
3-74
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
3.9.7 Hydraulic/electrical interpolation
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
filter, el
=Tv
eqv, hyd
- Tv
eqv, el
t
v
v
act, el
v
act, hyd
T
eqv, el
T
eqv, hyd
v
w
0,5
Fig. 3-25 Hydraulic/electrical interpolation
If dynamic stiffness control (DSC) is active, the DSC function must be activated
on all interpolating axes.
Target
Implementation
3 Startup
02.99

Siemens Sinumerik 840D Series Specifications

General

Axes	Up to 31 axes
Power Supply	24 V DC
Control Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
PLC	Integrated PLC (programmable logic controller)
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Max. Number of Channels	Up to 10 channels