FEC MICRO NR - Manual (Page 58)

Chapter 6: Fastening Instructions
Page 6-2
6.1 Fastening Control.
The Micro NR is presentable from two different fastening methods, by parameter setting Torque
Control or Angle Control methods. (Based on parameter setting)
NOTE: All setting recommendations are based upon common fastening applications.
Applications that experience high prevailing torque, excessive joint compression or other
unique characteristics must be set with these characteristics in mind.
6.1.1 Torque / Angle Method - Target Torque Control.
Fastening is performed based upon attaining a desired Torque value while monitoring the degrees
of rotation (Angle) of the fastener and time. Additional monitor items (limits) can be set to enhance
the system’s ability to determine if the fastener was properly secured (Section 6.2).
{ { { { Fastening Explanation
1. After start signal command the system runs INITIAL SPEED until INITIAL TIME expires.
2. Once FREERUN REVOLUTIONS or FREERUN TIME expires, the speed will switch from
FREERUN SPEED to SLOWDOWN SPEED.
3. Once SPEED CHANGE TORQUE is reached the speed runs at TORQUE SPEED to
fasten to STANDARD TORQUE. STANDARD TORQUE must be reached within the
FASTENING TIME LIMIT or a reject will occur.
FUNCTION RECOMMENDATION / COMMENT
14: SPEED CHANGE TORQUE 10% of STANDARD TORQUE
16: SNUG TORQUE Angle Monitoring Start Point (section 6.2)
13: STANDARD TORQUE Engineered product fastening specification (TORQUE)
22: STANDARD ANGLE
Set at 999.9 or high enough as not to inadvertently stop the
cycle and judge the operation based upon this value.
42: FASTENING TIME LIMIT Acceptance range to go from Cycle start to end of cycle.
11: PEAK TORQUE HIGH LIMIT
This is the high torque limit for the fastening cycle. If this limit
is exceeded the system will display reject.
12: PEAK TORQUE LOW LIMIT
This is the low torque limit for the fastening cycle. If this limit
is not achieved the system will display reject.
20: ANGLE LOW LIMIT
This is the low angle limit for the fastening cycle. If this limit is
not achieved the system will display reject. The snug torque
value is used for starting the angle count.
21: ANGLE HIGH LIMIT
This is the high angle limit for the fastening cycle. If this limit
is exceeded the system will display reject. The snug torque
value is used for starting the angle count.
68: RUNDOWN REVOLUTION
LOW LIMIT Numeric value that represents the minimum number of
revolutions during fastening cycle.
69: RUNDOWN REVOLUTION
HIGH LIMIT Numeric value that represents the maximum number of
revolutions during fastening cycle.