FEC AFC1200 - Manual (Page 20)

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6.3 Speed Functions
The AFC1200 System is user-programmable for operations involving multiple speed settings.
The use of multiple speeds during the fastening process aids in socket engagement,
achieving cycle time and controlling the applied torque during all stages.
SPEED
TIME
INITIAL TIME
FREE RUN
SPEED
SLOWDOWN
SPEED [ ] rpm
TORQUE SPEED
[ ] rpm
[ ] rpm
FREE RUN
1ST TIME [ ] FINAL TIME [ ]
[ ] sec
[ ] rev
OFFSET / INITIAL SPEED
[ ] rpm
[ ] sec [ ] rev
FIG. 6-3a Speed Functions
w If the offset check function is enabled in the sequence program, the System will start off
running a 360-degree offset check. After completion of the offset check, the System will
continue to run at OFFSET CHECK SPEED for the duration specified by the setting of
INITIAL TIME.
w If the offset check function is not enabled in the sequence program, the System will run at
INITIAL SPEED for the time specified by the setting of INITIAL TIME.
w Once INITIAL TIME has elapsed, the System will switch to FREERUN SPEED (High Speed
Rundown) for the remainder of the time specified by FREERUN TIME. [FREERUN TIME -
INITIAL TIME = HIGH SPEED RUNDOWN TIME]. If the System has been set-up properly,
the nutrunner will shift to SLOWDOWN SPEED before seating the fastener. The nutrunner
will run at SLOWDOWN SPEED until either 1ST TORQUE/ANGLE is reached or until 1ST
STEP TIME expires. If 1ST STEP TIME expires before reaching 1ST TORQUE/ANGLE,
the System will output a Time Over reject.
NOTE: The system will shift to TORQUE SPEED if either SPEED CHANGE TORQUE or 1ST
TORQUE/ANGLE is sensed, no matter which step is being performed.
Once 1st TORQUE/ANGLE is reached, the System will fasten at TORQUE SPEED for each
successive cycle (2nd, 3rd or Final). Each successive step must be performed within the
specified FINAL STEP TIME or a time over reject will occur.
Chapter 6: Fastening Instructions
Page 6-20