NC Commissioning with HMI Advanced
11.5 Axes and spindles
Manual
428 Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
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
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.
● Check optimization of the speed controller
● Check smooth running of the axes
● Check machine data for traversing motions
(Feedrate override, acceleration, max. velocities, ... )
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