Deprag AST11-1 Operating Instruction Booklet page 88

Analysis:
OK evaluation:
The screwing level is considered OK (fault free), if the switching off occurs via
the differential moment and the value of the torque is in the set limits.
On the angle of rotation monitoring option the reached angle must be within the
set limits.
Not OK analysis:
The screwing level is evaluated as Not OK (faulty) if the torque is outside the
set limits or the determined friction value is outside the indicted limits.
On an active angle of rotation the screwing level is evaluated as Not OK, if the
angle of rotation is outside the indicated limits.
The screwing level is also evaluated as Not OK when the monitoring time is ex-
ceeded.
Parameter:
The following parameters are used in the screwing sample:
• Supervision time
Maximum time until the screwing level is aborted
• Threshold torque angle measurement
Input of the torque from when the angle counting should be started.
• Start angle friction measurement
Input of an angle that should be turned after reaching the swell moment, prior to acti-
vating the friction value monitoring.
• Speed 1
Input of the rotation speed that should be used for the screwing application.
• Angle friction measurement
Input of the angle range in which the friction monitoring should be active. This range
starts with the start angle of the friction measurement.
• Friction value type
Selectively the maximum value or mean value of the friction value can be used to de-
termine the friction torque.
• Friction torque lower limit
Input of a minimum torque that must not be undershot by individual torque values
during the friction monitoring.
• Friction torque upper limit
Input of a maximum torque that must not be exceeded by individual torque values
during the friction monitoring.
• Friction value lower limit
Input of the minimum torque that must not be undershot by the friction torque.
• Friction value upper limit
Input of the maximum torque that must not be exceeded by the friction torque. The
limits of the friction torque can be recorded tighter then the limits of the individual fric-
tion values.
• Threshold torque Speed 2
Input of the differential torque at which the rotation speed decrease on the second ro-
tation speed occurs. The actual swell moment for the rotation speed decrease is de-
rived from the detected friction torque and the differential torque.
• Speed 2
Input of the rotation speed that should be used for the screwing application.
• Differential torque
Input of the differential end moment.
The actual target moment/torque results from the sum of the determined torque and
the differential moment.
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