FEC AFC1100 - Manual (Page 5)

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Maximum allowable Final step time FINAL STEP (TIME)
Maximum allowable fastening cycle time 1ST STEP (TIME)
Engineered fastening specification for rotation angle STD ANGLE
30 ~ 50% of resultant torque for Hard joints
50 ~ 90% of resultant torque for Soft joints SPEED CHANGE (TORQUE)
Engineered fastening specification at which angle control
begins SNUG (TORQUE)
30 ~ 50% of FINAL ANGLE or resultant torque for Hard joints
50 ~ 90% of FINAL ANGLE or resultant torque for Soft joints 1st TORQUE/ANGLE
RECOMMENDATION FUNCTION
{ Two-Step Fastening
P The System fastening parameters must be configured according to the Engineered
fastening specification.
P Two-step fastening will be used primarily for joints that have a requirement to
synchronize with another spindle during the final stage of the rundown.
Examples: Connecting rod, main bearing cap, any multiple-spindle unit.
P The System will fasten to the 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 rotate simultaneously the specified number of degrees from
SNUG TORQUE to STD ANGLE within the specified FINAL STEP time.
STEP
TORQUE
FINAL
STEP
FINAL ANGLE
1ST
STEP
1ST
ANGLE
SNUG TORQUE
ANGLE
(TIME)
SPEED CHANGE
TORQUE
FIG. 6-1-2b Angle Control Functions for Two-Step Fastening
Chapter 6: Fastening Instructions (Rev. 1/98)
Page 6-5