Atlas Copco Power Focus 3000 User Manual

Pset
108 (428) 9836 3123 01
average torque calculation is repeated after Step Angle degrees and the difference between every second
value is calculated (TDIFF in the illustration below):
[2]
2

nn
TTTDIFF
Each value of difference in torque is compared and the maximal difference (T
max
) is stored. The yield
point is considered reached when a calculated difference in torque is less than Yield slope ratio (expressed
as a percentage) of the current T
max
:
[3]
YIELDTratioslopeYieldTDIFF 
max
..
If the parameter P264 Extra angle step is set, then the tightening is continued for the stated angle after the
yield point is reached. The figure below illustrates the steps of the yield control.
Prerequisites and limitations for Yield control;
- Gold or ETX RBU
- PF4000
- Fixtured application, parameter T101 Usage set to fixtured
For the STwrench tool interfacing with the PF, the yield strategy is programmed in a
different way. Only parameter P264 Extra angle step needs to be set together with the
torque target and limits, and the angle limits. Check with your local Atlas Copco
representative how to setup your specific application.

Atlas Copco Power Focus 3000 Specifications

General

Brand	Atlas Copco
Model	Power Focus 3000
Category	Control Systems
Language	English