Atlas Copco PowerMACS 4000, User Manual

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Tightening
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6.5.3.7 Torque Profile
Parameters : TnStart, AnStart, AnStop, TnHigh, TnLow, where n is in the range [1..3].
Function : Checks that the torque in the three angle windows defined by TnStart and the pairs AnStart
and AnStop, is within the unique limits TnHigh and TnLow. The angles are measured from
from the start point according to the step angle defi
nition if TnStart isn‟t configured and from
TnStart if the parameter is used.
TnStart, AnStart and/or AnStop may be left empty. Leaving AnStart empty corresponds to
the beginning of the step while an empty AnStop corresponds to the end of the step.
TnHigh and/or TnLow may be left empty. Leaving them empty disables the test against the
limit in question. Note that if none of the torque limits is specified then TnStart, AnStart and
AnStop must also be empty and the restriction is not used.
Diagram 1 :
Angle
Torque
Step
T2Low
T2High
A3start A3stop
TnLow Torque Low AnStart Angle start
TnHigh Torque High AnStop Angle stop
T3High
T3Low
T1Low
T1High
A2start A2stop A1start A1stop
Tp3 Peak T