
B-63943EN-1/02 11.SPINDLE SPEED FUNCTION
- 1345 -
- Relationship with other optional functions
Constant surface speed control
The control function for keeping the surface speed constant can be
used with any of the four spindles, if the spindle speed is within the
range allowable for this function. (If position coders are required, this
function is enabled for serial spindles.) The spindle selection signal
(SWS 1-4) for the spindle must stay set at "1" during machining using
this function.
Spindle speed fluctuation detection
When this function is used with multi spindle control, multiple
position coders can be used. So, when a spindle speed fluctuation is
detected, attention must be paid to the states of the position coder
selection signals (PC2SLC, PC3SLC, and PC4LC) and spindle
selection signals (SWS1 to SWS4)
Actual spindle speed output
The actual spindle speed output function conveys speed information
obtained from the position coder specified by the position coder
selection signals (PC2SLC, PC3SLC, and PC4SLC) to the PMC.
Polygon turning
Polygon turning rotates a tool axis in phase with the spindle. To
perform polygon turning when multi-spindle control issued, select the
spindle and the position coder associated with the spindle.
Spindle synchronization, polygon turning between spindles, simplified
synchronization control
During spindle synchronization, polygon turning between spindles or
simplified synchronization control, the slave spindle operates in phase
with the master spindle. Multi-spindle control for the master spindle
can be used during synchronization control, but multi-spindle control
for the slave spindle is disabled.
Rigid tapping
One of the first to fourth spindles can be selected as the rigid tapping
axis according to the states of the spindle selection signals (SWS1 to
SWS4) to perform rigid tapping. However, the following restrictions
are imposed:
• Set the SWS1 to SWS4 signals before directing rigid tapping;
• Do not switch the SWS1 to SWS4 signals during rigid tapping;
and
• Use the appropriate ENB signal (either ENB or ENB2) for the
selected spindle as the ENB signal for the rigid tapping PMC
sequence.
The spindles not used for rigid tapping can be rotated at a speed
specified before rigid tapping starts, or can be stopped.