
B-63943EN-1/02 11.SPINDLE SPEED FUNCTION
- 1465 -
- Cautions when a function such as the spindle positioning function is used
together
CAUTION
1 When the spindle orientation function is to be used at the same time
The spindle orientation function positions the spindle by using sensors and the
PMC, without being directly controlled by the CNC.
The CNC has no direct control over this processing, instead following the
specifications of the spindle orientation function being used.
2 When the spindle positioning function is to be used at the same time
When the spindle positioning function is to be used together with rigid tapping, rigid
tapping mode must not be specified in spindle indexing mode, and spindle indexing
mode must not be specified in rigid tapping mode. (Spindle positioning and rigid
tapping cannot be performed simultaneously for a single spindle.)
This is not applicable when multi spindle control is used together and a spindle
used for spindle position indexing is different from a spindle used for rigid tapping.
3 When the spindle positioning function is to be used at the same time
When the Cs contouring control function for the serial spindle is used together with
the rigid tapping function, the same motor is used for spindle rotation control, Cs
contouring control, and rigid tapping modes. The following points must be noted:
(1) Whether to enter Cs contouring control mode or spindle rotation control mode
is selected by the CON (Cs contouring control switch signal) signal; however,
the system can enter rigid tapping mode regardless of the state of the CON
signal. When the rigid tapping mode is canceled the system enters spindle
rotation control mode or Cs contouring control mode according to the state of
the CON signal.
(2) Since the system can change to rigid tapping mode directly from the Cs
contouring control mode, use of the Cs contouring control function enables the
tapping tool to be positioned before rigid tapping begins. Accurate positioning is
not guaranteed. If the rigid tapping cycle executes gear change or output range
changing, positioning is valid.
(3) Although the system can change to rigid tapping mode directly from Cs
contouring control mode, positions designated in Cs contouring control mode
are not preserved if rigid tapping mode is canceled by G80. When the system
is changed to rigid tapping mode from Cs contouring control mode, then returns
to the Cs contouring control mode, G00 or G28 must be issued to position the
tapping tool.
(4) In systems with the serial spindle Cs contouring control function, the spindle
motor is in a state called servo mode when it is operating in rigid tapping mode.
In servo mode, it can accept jogging and manual handling feed. To prevent
this, inhibit jogging and manual handling feed of the Cs contouring axis in the
PMC logic during rigid tapping.
(5) The servo-off signal for the Cs contour control axis is valid also for the spindle
during rigid tapping. It should be masked on the PMC side as required.