Atlas Copco PowerMACS 4000, User Manual

Page: 146 / 668

Set Up and Maintenance
146 9836 3521 01
To use a conversion box for QMR/QMX spindles, see appendix Configuration of the Conversion Box.
The parameter Service interval is used to define the service interval, in number of cycles. To disable the
time for service event check the Disable time for service event checkbox.
4.6.2 Calibration page
The Calibration page is used to calibrate a spindle. All parameters on this page are stored to the physical
spindle. Note that only the available channels are visible.
The parameter Torque 1 Scale Factor and Gain controls the measuring on Torque Channel 1. Normally
a spindle with a 50Nm transducer should have a scalefactor of 50 at Gain 1.0. If the spindle has a second
torque channel equipped it is possible to calibrate that channel aswell.
Note that if you change the Gain it is recommended to recalibrate the scale factor.
For the respective angle channel you may use the Wind Up to compensate for the torsion in the gears
and the shaft caused by the applied torque. They are expressed in the unit [degrees at maximum spindle
torque]. Please note that it is the torque transducer used for control that is used as input for the
compensation. See chapter Wind Up Coefficient in Calibration procedures in PowerMACSfor how the
Wind Up value can be calculated.