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P1934E/EN 2009-04
en03c381.fm, 23.04.2009
Programming
3
Sequence 50
Angle Controlled Tightening with Angle and Torque Monitoring
This tightening sequence is generally preceded by a fast pre-tightening cycle. The transducer
integrated into the nutrunner measures the torque and the resolver measures the angle during
the tightening. The values are processed by the control system. When the Turnoff angle is
reached the nutrunner is shut off. Thereafter the final angle and the peak torque are measured
during a dwell time, and these tightening values for the bolt are then processed together with the
evaluation of the rundown in the control system. These values are displayed on the Run Screen
and can be output to a printer or transmitted to other system components by data communica-
tion. When the trigger torque is reached the torque curve is recorded and can be viewed and
evaluated using the oscilloscope function.
The following parameters are programmable from the Standard Application Builder:
• Sequence input value = 50
• Trigger Torque (Nm) = trigger torque, beginning of measurement for the graphic display
• Threshold Torque (Nm) = threshold torque, beginning of angle counting
• Turnoff Angle (deg) = shut-off angle for the stage
• Angle High Limit (deg) = maximum angle, high limit for angle reached.
• Angle Low Limit (deg) = minimum angle, low limit for angle reached
• Torque High Limit (Nm) = maximum torque, high limit for torque reached and safety shut-off
• Torque Low Limit (Nm) = minimum torque, low limit for torque reached
• Speed = maximum speed of the nutrunner during the tightening stage.
Parameter name
Range
Typical
Fastening strategy
Sequence 50
Angle Control/Torque Monitoring
Trigger Torque [Nm]
0 to Tool Max
10% of Turnoff Torque
Threshold Torque [Nm]
0 to Tool Max
As appropriate
Torque Low Limit [Nm]
-tool maximum value* to tool
maximum value
70% of Final Torque
Torque High Limit [Nm]
Low Limit to Tool Max.
130% of Final Torque
Angle Low Limit [Deg]
0 to 9999
90% of Turnoff Angle
Turnoff Angle [Deg]
Low Limit to 9999
As appropriate
High Angle Limit
Turnoff angle to 9999
110% of Turnoff Angle
Speed Stage [RPM]
0 to Tool Max
50
