Siemens SINUMERIK 840Di Manual page 426

13 Drive Optimization using HMI Advanced
13.4 Frequency response measurement
Additional
information
13-426
Offset
A low offset of a fed motor revolutions per minute can be selected to rule out an
influence of the static friction.
S
The Offset is run up using an acceleration ramp.
S
The acceleration value is defined for one
axis: check MD 32300: MAX_AX_ACCEL
spindle: check MD 35200: GEAR_STEP_SPEEDCTRL_ACCEL
MD 35210: GEAR_STEP_POSCTRL_ACCEL
S
The following applies:
S
The actual measuring function becomes active only when the offset value is
reached.
Settling time
This value represents the delay between measured data recording/test setpoint
output and the injection of the offset.
Speed
setpoint
Amplitude
Offset
Settling time
0
Position
characteristic
0
Fig. 13-3 Setpoint signal with measuring function speed control loop – step
response
The measurement parameters and the measurement results (diagrams) can be
loaded and/or saved using the soft key File functions.
Acceleration value = 0, no ramp
Acceleration value > 0, ramp active
Measuring period
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
06.03
Time
Time