July 2013 6.12 Spindle 987
6.12.12 C-axis operation
In C-axis operation, an axis and a spindle are driven by the same motor.
Digital or analog operation of axis and spindle is possible. Axis and spindle may
each be equipped with one position encoder. Because the speed encoder is
built into the motor, it measures both the axis and the spindle.
As of software version 606 42x-01 SP 02, it is possible to run a C axis with the
CC 61xx. The position encoder inputs must be on the same drive-control
motherboard in the CC 61xx. This way, you can configure a second position
encoder input for a drive for C-axis operation or a central drive. It is not possible
to distribute the position encoder inputs to various drive-control
motherboards.
Example:
Spindle on X15, X51, X201
B axis with additional position encoder on X15, X51, X202
This configuration is possible, but the spindle position encoder must be
connected with the position input belonging to the PWM output.
Assignment of encoder inputs and speed command outputs to the axis and
spindle:
Enter in MP110.x the position encoder input of the axis (if present).
Enter in MP111.x the position encoder input of the spindle (if present).
Enter MP112.x = 0 for the axis (it uses the speed encoder of the spindle
motor).
Enter in MP113.x the speed encoder input of the spindle.
Enter the same speed command output in MP121.x for the spindle and in
MP120.x for the axis.
Commissioning of the axis and the spindle:
The current and speed controllers are commissioned only for the spindle.
The position controllers must be commissioned separately for the axis and
spindle.
The axis position controller should be commissioned in the gear range that
is actually used for positioning.
If possible, use the lowest gear range to ensure optimum control.
C axis operation must be deselected for commissioning the spindle,
meaning that no identical PWM outputs may be entered in MP120.x and
in MP121.x.
To Next Page
Loading...
