Siemens SINUMERIK 840Di sl Commissioning Manual page 428

NC Commissioning with HMI Advanced
11.5 Axes and spindles
Actual velocity monitoring
Monitoring due to the actual velocity of the machine axis determined based on the encoder
values
● MD36020 $MA_AX_VELO_LIMIT (velocity-monitoring threshold)
Error reaction:
● Alarm "25030 Alarm limit of actual velocity"
and stopping the machine axis using a speed setpoint ramp whose characteristic curve is set
in the following machine data:
● MD36610 $MA_AX_EMERGENCY_STOP_TIME (braking ramp time when errors occur)
Causes of error/error handling:
● Check speed setpoint cable
● Check actual values
● Check position control direction (control sense)
● Threshold value for velocity monitoring is possibly too low.
Contour monitoring
Monitoring of the difference between following error measured and following error calculated
from the position setpoint.
● MD36400 $MA_CONTOUR_TOL (contour monitoring tolerance range)
Error reaction:
● Alarm "25050 Contour monitoring"
and stopping the machine axis using a speed setpoint ramp whose characteristic curve is set
in the following machine data:
● MD36610 $MA_AX_EMERGENCY_STOP_TIME (braking ramp time when errors occur)
Causes of error/error handling:
Contour errors are caused by signal distortions in the position control loop.
Execute the following steps for error removal:
● Increase the tolerance band
● Check the Kv factor
● Check optimization of the speed controller
● Check smooth running of the axes
● Check machine data for traversing motions
428
The real servo gain must correspond to the desired servo gain set by MD32200
$MA_POSCTRL_GAIN[n] (Kv factor).
HMI-Advanced
Operating area: DIAGNOSIS > Service displays > Service axis.
(Feedrate override, acceleration, max. velocities, ... )
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Manual