FEC AFC1100 - Manual (Page 6)

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6.2 Monitoring Functions
The AFC1100 System is user programmable to select and set the monitoring limits for torque,
angle, time and two independent torque rate stages.
6.2.1 Torque Monitoring
Torque Monitoring is a continuous process whenever the System is operating. In Torque
Control method, the High and Low Torque limits are set based upon the engineering
specification for that specific fastener. For Angle operations, the High and Low Torque limits
are either set by the engineering specification for that specific fastener, or by determining the
acceptable limits from a study of known good and bad assemblies. The High Torque limit will
stop the fastening process for Angle Control operations if it is reached before attaining the
desired angle.
6.2.2 Angle Monitoring
Angle Monitoring commences upon reaching the preset SNUG TORQUE value, and
continues until completion of the fastening process or until the High angle limit is reach,
whichever occurs first. In Angle Control method, the High and Low Angle limits are set based
upon the engineering specification for that specific fastener. For Torque Control operations,
the High and Low Angle limits are either set by the engineering specification 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
operations if it is reached before attaining the desired torque.
HIGH TORQUE
TORQUE
FINAL TORQUE
HIGH TORQUE
LOW TORQUE
HIGH ANGLE
LOW ANGLE
ACCEPT AREA
ANGLE
(TIME)
LOW TORQUE
SNUG TORQUE
1ST. ANGLE
LOW ANGLE
FINAL ANGLE
FIG. 6-2-2 Torque and Angle Monitoring Functions
Chapter 6: Fastening Instructions (Rev. 1/98)
Page 6-6