Siemens SINUMERIK 840Di sl Commissioning Manual page 416

NC Commissioning with HMI Advanced
11.5 Axes and spindles
Default values
The default values of the acceleration are in the range of 0.5 m/s
Checking the acceleration
The sign of a properly adjusted acceleration of a machine axis is acceleration and
positioning free from overshoot at rapid traverse rate and maximum load (heavy workpiece).
After the acceleration has been entered, the axis is traversed rapidly and the actual current
values and current setpoint are recorded.
Note
• SINAMICS
• SIMODRIVE
The online help provides more detailed information.
This recording shows whether the drive reaches the current limit. Here, the current limit can
be reached for a short time.
The current must be well below the current limit, however, before the rapid traverse velocity
or the final position is reached.
Load changes during machining must not cause the current limit to be reached. Excessive
current during machining causes falsification of the contour. For this reason, the acceleration
value should be a little bit less than the maximum acceleration value.
Machine axes can have different acceleration values, even if they interpolate with each other.
Machine data
Table 11-32 Position control: Machine data
Number Name
Axisspecific ($MA_ ... )
32100 AX_MOTION_DIR[n]
32110 ENC_FEEDBACK_POL[n]
32200 POSCTRL_GAIN [n]
32300 MAX_AX_ACCEL[n]
32900 DYN_MATCH_ENABLE[n]
32910 DYN_MATCH_TIME [n]
References:
/FB/ Function Manual - Basic Functions, G2 Velocities, Setpoint/Actual Value Systems,
Control, Chapter "Control"
416
The current actual value/setpoint can be recorded using the STARTER trace function.
The current actual value/setpoint can be recorded using the trace function of SimoCom
U.
Name/remarks
Traversing direction
Actual value sign
Kv factor
Axis acceleration
Dynamic response adaptation
Time constant for dynamic matching
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
to 2 m/s .
2 2
Manual