FEC FUSIONE-HS-2 - Manual (Page 113)

FEC Fusion Operations Manual Chapter 6: Fastening Instructions (Rev. 2)
Page 6-17
For Torque Control operations, the High and Low Angle limits are either set by the engineering speci-
fication for that specific fastener, or by determining the acceptable limits from a study of known good
and bad assemblies. The High Angle limit will stop the fastening process for Torque Control opera-
tions if it is reached before attaining the desired torque.
TORQUE CONTROL
REJECT TYPE CAUSES
HIGH ANGLE LIMIT
Increased joint compression.
Reduced joint friction.
High initial prevailing torque.
Incorrect parameter set-up.
LOW ANGLE LIMIT
Reduced joint compression.
Increased joint friction.
Reject condition caused by another monitor item reject.
FIG. 6-2-3b Angle Monitoring – Torque Control
Snug Torque
1 st Time Final Time
Standard Torque
Threshold Torque
Speed Change Torque
1 st Torque
Crossover Torque
Torque
Angle/Time
Peak Torque High Limit
Peak Torque Low Limit
Angle High Limit Angle Low Limit