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Analysis:
OK evaluation:
The screwdriving sequence is considered OK (fault free), if the shut-off occurs via tor-
que and the torque value is within the preset limits.
If the Angle monitoring option is active the final angle value must be within the preset
limits.
Not OK evaluation:
The screwdriving sequence is evaluated as Not OK (faulty) if the final torque value is
outside the preset limits or the maximum screwdriving time has been exceeded.
If angle monitoring is active the screwdriving sequence is evaluated as Not OK, if the
angle value is outside the preset limits.
Parameters:
The following parameters are used in the screwdriving sequence:
• Supervision time: Maximum time until the shut-off torque is reached
• shut-off torque, shut-off
torque lower / upper limits
• Speed 1
• Threshold torque for Speed 2 (step 2)
• Speed 2
• Torque holding time
• Angle of rotation supervision: active / inactive
if angle monitoring is active the following parameters are added.
◦
Threshold torque for angle measurement
◦
Angle lower limit / angle upper limit
11.1.3 Fasten / Loosen to Angle
The screwdriving strategy fasten / loosen to angle of rotation is a tightening / loosening
process with stop control via angular displacement (angle control).
Figure 45: Screwdriving to Angle
