HEIDENHAIN iTNC 530 HSCI - Performance of the CC 61 Xx; Single-Speed and Double-Speed (Software Option 49)

1074 HEIDENHAIN Technical Manual iTNC 530 HSCI
7.4.2 Single-speed and double-speed (software option 49)
Controller
performance
Performance of the CC 61xx
Depending on the required machine or controller performance, it may be
necessary to drive an axis with increased computing power of the controller:
this is then referred to as a double-speed axis. On the CC 61xx controllers,
there is a DSP on every drive-control motherboard. The UEC 11x controller
also has a DSP, with which it controls all the axes of the UEC 11x.
A DSP has sufficient computing power to control up to six single-speed axes
or three double-speed axes. A double-speed axis requires the computing
power of two single-speed axes. This enables you, for example, to achieve
excellent results regarding the workpiece surface quality or speed
optimization.
Single-speed control loops are used for:
 Spindles
 Conventional axes
With the CC 61xx, single-speed control loops can normally also be used for:
 Linear motors
 Torque motors
Double-speed control loops are used for:
 High-frequency spindles
 "Axes that are difficult to control"
The Technical Manual of your control describes the conditions under which a
double-speed control loop must be used. All control loops are defined as
single-speed control loops in the software default settings.
With the CC 61xx controller generation, single-speed or double-speed axes
are no longer configured on the specific DSP (CC 424), but individually in
MP2000.x.
With the CC 61xx, it is possible to distribute double-speed axes controlled by
one DSP over any of the outputs of the controller groups. The only restriction
is the maximum controller performance of the parent DSP, which must not be
exceeded. For example, with a CC 6106 up to any three outputs may be used
for double-speed axes.
Double-speed control loops are needed particularly for linear drives in order to
attain proper speed/position control factors required by high-efficiency
mechanical systems.
High-speed spindle motors requiring PWM frequencies greater than 5 kHz
with short current controller cycle times can be operated only with double-
speed control loops.
Note
CC 61xx double-speed control loops require software option 49!