Atlas Copco PowerMACS 4000, User Manual

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Tightening
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An event and the error bit RFTLIMRE (Remove Fastener Torque Limit REeached) indicate the
condition.
Backlash compensation (only available for Gauging)
All steps will do backlash compensation, if the direction is different from the previous step and a measured
backlash correction exists (measured with step BCT
– Backlash correction (only available for Gauging)
During the backlash correction nothing in the steps will be run. This means that all checks will start after
the backlash correction is finished. The same is true for the step. They will not start to execute the control
function before the backlash is finished. This means that a step will not end even if the target torque is
reached during the backlash. It also means that all angle measurements will start when the backlash is
finished.

Reset backlash : If checked the stored backlash value (from an earlier cycle) will be reset at
cycle start.
Default value is checked

Speed : The speed used for the backlash compensation. All steps in the program will use the
same speed.

Angle channel : Channel for Backlash and Position measurements. The backlash
compensation and the position measurements are made on the same angle channel.
The stored backlash compensation and positions ( Null, Half, Peak and Low ) will be cleared on cycle start
if the program uses a different channel compared to the previous program that was run.