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Parameters:
The following parameters are used in the screwdriving Sequence:
• Supervision time: maximum time until the cut-out torque is reached
• Shut-off torque, shut-off torque upper/lower limits
• Speed
• Torque holding time
• Angle supervision: active / inactive
if angle monitoring is active the following parameters are added:
◦ Threshold torque for angle measurement start
◦ Angle lower limit / angle upper limit
11.1.2 Extended Fasten to Torque
The screwdriving strategy extended fasten to torque is a tightening process with shut off at
a preset torque value. Angle monitoring is possible as an option.
Strategy Description:
Figure 44: Expanded screwdriving to Torque
Strategy description:
At the start of the first screwdriving sequence/step time monitoring is started and the
screwdriving process is started with RPM setting 1. Once the torque threshold for step one
has been achieved, Sequence step 2 is started and the speed setting is changed to RPM
2. Cyclic torque measurements are performed. If the angle monitoring option is active then
angle measurements are performed in addition starting at the preset torque threshold
value (sequence step 2).
Shut-off criteria:
The screwdriving process is ended once the
• target shut-off torque is achieved
• the maximum screwdriving time (time monitoring) is expired
• the maximum angle of rotation is reached (only when angle monitoring is active)
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