FEC MICRO NR - Manual (Page 66)

Chapter 6: Fastening Instructions
Page 6-10
6.4.2 Rundown Revolution Limits
Rundown Revolution high and low limits can be set to identify fasteners that may be too long or
too short for normal operations or for a redundant check for bolts that reach torque but are not
seated. This is especially the case where different length fasteners are used and placed by hand.
The number of rundown revolutions until fastening end is monitored and judged. Rundown
Revolutions is measured from the start of revolution to fastening end.
Note: Since fastener engagement is not always 100% guaranteed (and this is counted in
revolutions), bolt length differences must be enough for detection without setting limits too tight or
problematic rejects may occur. Also, if bolts are hand started (with a variable starting point) this
function is not recommended unless the bolts are pre-started to the same point every cycle.