
B–63833EN–1/02
9. SPINDLE SPEED FUNCTION
474
This function positions the spindle using the spindle motor and position
coder.
The function has a coarser least command increment compared with the
Cs contour control function and has no interpolation capability with other
axes. However, it can be installed more easily because the position
detector is a position coder.
Generally, the spindle positioning axes are clamped mechanically except
when positioning is under way.
In the turning process, the workpiece is rotated by the spindle to which
it is attached (spindle rotation mode), at the speed specified for the spindle
motor. The value for the spindle speed is input from the spindle controller
to the spindle amplifier.
When the optional spindle positioning function is activated, the spindle
is moved to a defined angle, and the workpiece is repositioned at that
angle. The specified move distance is input to the error counter, and the
velocity command is issued for the spindle motor through the spindle
amplifier. The position of the spindle is detected by the installed position
coder (Spindle positioning mode).
The spindle positioning function can perform the following operations:
D Release the spindle rotation mode and enter the spindle positioning
mode
Specifying a particular M code sets a reference position in the
spindle positioning mode. (This is called spindle orientation.)
D Position the spindle in the spindle positioning mode
Position an optional angle using address C (H), and position a
semi-fixed angle using a specific M code parameter.
D Release the spindle positioning mode and enter the spindle rotation
mode
Specifying a particular M code parameter changes the spindle to
the spindle rotation mode.
Also, relationship between M codes and these operations are set by
parameters (refer to No. 4950#2 (ISZ), #7 (IMB)).
· Least command increment
360
4096
= 0.088 deg
.
.
· Minimum input increment
0.001 deg
· Maximum command value
±9999.999 deg
9.7
SPINDLE
POSITIONING
(T SERIES)
General