
B--63003EN--1/02
9. SPINDLE SPEED FUNCTION
800
The control function for keeping the surface speed constant can be used
with any of the three spindles if the spindle speed is within the range
allowable for this function. (When the position coder is required, it can
be installed on the 1st or 2nd spindle). The spindle selection signal (SWS
1--3) for the spindle must stay set at “1” during machining using this
function.
When the spindle speed fluctuation detection function is combined with
multi-spindle control, two position coders can be used. Monitor the states
of the second position coder selection signal (PL2SLC) and spindle
selection signals (SWS 1--3).
The actual spindle speed output function conveys speed information
obtained from the selected position coder specified by the 2nd position
coder selection signal (PC2SLC) to the PMC.
When the parameter HSO (No. 3709#5)=1, the difference of the feedback
pulses between the 1st and 2nd position coder can be output irrespective
of the state of 2nd position coder selection signal (PC2SLC).
When the spindle motor is used for positioning, as in the case of spindle
positioning or Cs contour control, the first spindle functions as the
positioning spindle. Switching to the positioning mode and positioning
command are possible irrespective of the state of the selection signal of
the first spindle (SWS1). This means that the first spindle cannot be
controlled as a spindle in positioning mode, but the second and third
spindles can be controlled as usual.
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.
During spindle synchronization, polygon turning between spindles or
simplified synchronization control, the second spindle operates in phase
with the first spindle. Multi-spindle control for the first and third spindles
can be used during synchronization control, but multi-spindle control for
the second spindle is disabled.
Using the spindle selection signal (SWS 1--3), rigid tapping can use either
the first or second spindle as the rigid tap spindle. There are certain
restrictions:
D Set the SWS 1 to 3 signals before directing rigid tapping;
D Do not switch the SWS 1 to 3 signals during rigid tapping; and
D 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.
Refer to 9.4 “Spindle Control for Two-path Lathe”.
Relationship with other
optional functions
D Constant surface speed
control
D Spindle speed
fluctuation detection
D Actual spindle speed
output
D Spindle positioning or
Cs contour control
D Polygon turning
(T series)
D Spindle synchronization,
polygon turning between
spindles, simplified
synchronization control
D Rigid tapping
D Two-path control option