
B–63503EN–1/01
9. SPINDLE SPEED FUNCTION
437
Spindle configuration when multi-spindle control is used:
Necessary
option and
parameter
· Spindle serial output
· Parameter NSP (No. 8133#3 multi–spindle control) = 1
· Parameter SS2 (No. 3701#4) = 1
(to use second spindle)
Connection of
each spindle
· JA7A (on CNC main board)
→JA7B (on first spindle control unit)
· JA7A (on first spindle control unit)
→JA7B (on second spindle control unit)
Connection of
each position
coder
First position coder: Feedback information obtained by posi-
tion coder or equivalent sensor connected to first spindle con-
trol unit is fed to CNC via serial interface.
Second position coder: Feedback information obtained by
position coder or equivalent sensor connected to second
spindle control unit is fed to CNC via serial interface through
1st spindle control unit
Note) When second spindle is not connected, second posi-
tion coder cannot be used.
For detailed information about serial spindle connection, refer to the
manuals on the serial spindles.
The control function for keeping the surface speed constant can be used
with any of the two 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
1–2) 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 1–2).
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 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 spindle 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.
Connection of spindle
Relationship with other
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)