Siemens SINUMERIK 840D Simodrive 611 digital - Page 192

10
03/2006
10.5 Measuring function for coupled axes
10-192
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
In the reference frequency response for the speed control loop, actual and set-
point speed values may be entered as the following measuring parameters for
both interconnected gantry/axes and master/slave couplings.
Amplitude of leading axis or master axis
This parameter determines the magnitude of the test signal amplitude for the
gantry leading or guiding axis or master axis in mm/min. On the motor side, this
should cause a slow speed of just a few (approx. 1 to 2) rpm.
Amplitude of synchronizing axis(es) or slave axis(es)
Edited measured variables for the amplitude of the gantry synchronizing
axis(es) or slave axis(es) in mm/min.
Bandwidth
Analyzed frequency range
4.0 kHz for 840D (scanning frequency 8.0 kHz).
Averaging
This value increases both the accuracy of the measurement and the measuring
duration. A value of 20 is normally suitable.
Settling time
Recording of the measured data starts after a delay equal to the value set here
after activation of the test setpoint. A value of between 0.2 and 1 s is recom-
mended.
Offset
The offset is started up via an acceleration ramp.
The acceleration value is defined for an
Axis: MD 32300: MAX_AX_ACCEL
Spindle: MD 35200: GEAR_STEP_SPEEDCTRL_ACCEL
MD 35210: GEAR_STEP_POSCTRL_ACCEL
Where: Acceleration value = 0, no ramp
Acceleration value > 0, ramp active
The actual measuring function is not activated until the offset value is reached.
Speed control loop: All the axes are on a 1-axis module.
Axis X1 (1) Master axis
Axis Z1 (3) Slave axis
Axis A1 (4) Slave axis
Axis (7) Slave axis
In a pure coupling mode, the displayed texts change if a different coupling mode
was previously active. The structure of the entire user interface does not
change. An axis is displayed as a master axis and all the other axes are then
the slave axes.
!
Important
Only the coupling axes for the selected axis are displayed.
If there are two axes on a double-axis module, neither the gantry nor the
master/slave are displayed in a pure coupling mode.
It should be noted that only one measuring function can ever be started per
module.
Measuring
parameters in the
speed control loop
Example of a pure
master–slave
coupling
10 Drive O
p
timization