Deprag AST6 Operating Instruction Booklet page 61

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
exceeded.
Parameter:
The following parameters are used in the screwing sample:
• Maximum time
Maximum time until the screwing level is aborted
• Swelling moment angle counting
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
activating the friction value monitoring.
• Rotation speed 1
Input of the rotation speed that should be used for the screwing application.
• Friction measurement angle
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 creation
Selectively the maximum value or mean value of the friction value can be used to
determine the friction torque.
• Minimum friction torque
Input of a minimum torque that must not be undershot by individual torque values
during the friction monitoring.
• Maximum friction torque
Input of a maximum torque that must not be exceeded by individual torque values
during the friction monitoring.
• Minimum friction value
Input of the minimum torque that must not be undershot by the friction torque.
• Maximum friction value
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
friction values.
• Swelling torque rotation speed 2
Input of the differential torque at which the rotation speed decrease on the second
rotation speed occurs. The actual swell moment for the rotation speed decrease is
derived from the detected friction torque and the differential torque.
• Rotation speed 2
Input of the rotation speed that should be used for the screwing application.
• Differential moment
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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