HEIDENHAIN iTNC 530 HSCI - Page 988

988 HEIDENHAIN Technical Manual iTNC 530 HSCI
If you use only one position encoder for both the spindle and the axis, the axis
display keeps running while the spindle is in operation:
 Before switching from the axis to the spindle, save the actual position value
of the axis with Module 9146. This ensures that the axis display remains at
the last value, even when the spindle is rotating.
 Before switching from the spindle to the axis, recover the actual position
value of the axis with Module 9146.
If you save the actual position value with Module 9146 and then close the
position control loop, or if the position control loop is closed and the actual
position value is then saved with Module 9146, the error message Actual
position value saved <Axis> appears. The error message triggers an
emergency stop.
Switching from spindle to axis:
 Stop the spindle.
 Switch to the gear range required for axis operation.
 Switch the spindle motor to the axis.
 With Module 9156, switch the axis from the open-loop to the closed-loop
(servo-controlled) state.
 Enable the current and speed controls via Module 9161 with the
corresponding bit for the axis.
 Release the axis clamping.
 Close the position control loop of the axis by setting the corresponding bit
in W1040/W1132.
 Begin axis operation.
Switching from axis to spindle:
 Stop the axis.
 Clamp the axis.
 Open the position control loop of the axis by resetting the corresponding bit
in W1040/W1132.
 With Module 9155, switch the feedback control for the axis off.
 Switch the spindle motor from the axis back to the spindle.
 With Module 9161 bit 15, release the current and speed controllers.
 Shift back to the original gear range.
 Start spindle operation.