FEC AFC1200 - Manual (Page 13)

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P For a standard two-step operation, the System will fasten to 1st TORQUE/ANGLE
during the specified 1ST STEP time. Once either SPEED CHANGE TORQUE or
1st TORQUE/ANGLE is reached, the System will switch to the specified TORQUE
SPEED (Section 6.3). When all fasteners have reached 1st TORQUE/ANGLE, the
spindles will synchronize and then fasten simultaneously until the desired bolt
stretch has been reached, within the specified FINAL STEP time. Once
CROSSOVER AREA is attained or exceeded, the actual elongation area is
compared to the calculated elongation area. When the actual elongation area is
equal to or greater than the calculated elongation area, the proper bolt stretch has
been obtained.
NOTES: Setup for Torque Control and Angle Control items are detailed in separate Sections.
Yield Control Method cannot be configured properly without first performing extensive
testing on the joint.
Start point of area yield method. Set based upon
extensive testing CROSSOVER AREA (TORQUE/ANGLE)
Compensation factor for calculated bolt stretch. Set
based upon extensive testing CONSTANT
Expectant torque rate of fastener when proper bolt
stretch has been obtained. Set based upon
extensive testing YIELD RATE
Engineered fastener rotation into yield specification.
Automatically set when "length" is set ANGLE
Engineered fastener permanent elongation
specification. Automatically set when "angle" is set LENGTH
Fastener specification SCREW PITCH
RECOMMENDATION FUNCTION
Chapter 6: Fastening Instructions User Console Version A3.53
Page 6-13