FEC AFC1200 - Manual (Page 17)

)(& ,QF
POINT TO POINT
TORQUE RATE
A
1st TORQUE / ANGLE
STD.
THRESHOLD 1 TORQUE
CROSSOVER RATE 2
2ND RATE HIGH
1ST RATE
HIGH
2ND RATE
LOW
3RD RATE
HIGH
3RD RAT
LOW
1ST RATE LOW
TORQUE
3
1
2
FIG. 6-2-3 Point-to-Point Torque Rate Monitoring
6.2.4 Integrated Torque Rate Method
The AFC1200 System is capable of performing three (3) independent torque rate calculations
using two (2) different procedures for calculating the rate value. The second of these
procedures is the Integrated method. The Incremental Torque Rate Method is enabled
whenever a value (3 ~ 199 odd number) is entered for the INCREMENT ANGLE on the SET
PARAMETER (FASTENING) screen. This method continuously calculates the torque rate for
the period specified by the INCREMENT ANGLE. Each one degree, the actual torque rate is
compared with the preset high and low torque rate values. The calculation is performed until
the end of the stage is reached or until a failure occurs, whichever occurs first. Each
Incremental Torque Rate is calculated by dividing the change in torque during the specific
period (INCREMENT ANGLE) by the INCREMENT ANGLE.
Exp..
Chapter 6: Fastening Instructions
Page 6-17