Atlas Copco PowerMACS 4000, User Manual

Page: 315 / 668

Tightening
9836 3521 01 315
6.5.3.6 Cross Thread and Gradient
Parameters : Torque level T1, Torque level T2, Min angle, Max angle
Function : Measures the angle from the point where torque passes Torque level T1 to the point where
torque passes Torque level T2. Checks that the measured angle, A, is between Min angle
and Max angle.
Min angle or Max angle can be left empty meaning that the respective test is disabled. Note
that at least one of them must be configured.
Diagram :
T1
T2
Angle
Torque
T1 Torque Level T1 Amin Angle min
T2 Torque Level T2 Amax Angle max
A Measured angle from T1 to T2
Step
Amax
Amin
A
Alarms : Cross thread restriction (CROSSTR) if A > Max angle. Cross gradient too high restriction
(CROSSGR) if A < Min angle.
Trace : Two lines are shown in Torque vs. Angle view. The horizontal line represents the T2 level
and it starts when T1 is passed and ends after Amin degrees. The vertical line represents
the point where Amax degrees are passed after T1. The step fails if any of the lines is
crossed. Restriction limits must be enabled in the trace form (see View of trace curves).