FEC MICRO NR User Manual
Page 60
Chapter 6: Fastening Instructions
Page 6-4
6.1.2 Torque / Angle Method - Target Angle Control.
Fastening is performed based upon attaining a desired Angle value,
while monitoring the Torque 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).
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Fastening explanation
1. After start signal command the system runs INITIAL SPEED until INITIAL TIME expires.
2. Once FREERUN REVOLUTIONS or FREERUN TIME expire, 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 ANGLE. STANDARD ANGLE 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 Control Start Point (section 6.2)
13: STANDARD TORQUE
Set at Calibration Torque or high enough as not to
inadvertently stop the cycle and judge the operation based
upon this value.
22: STANDARD ANGLE
Engineered product fastening specification (ANGLE)
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 revo-
lutions during fastening cycle.
69: RUNDOWN REVOLUTION
HIGH LIMIT
Numeric value that represents the maximum number of revo-
lutions during fastening cycle.