
11. OPTION RELATED TO SPINDLE
B–65162E/03
446
Z NRROA and ROTAA determine the direction of rotation.
When NRROA is set to 1, the spindle rotates from the current
stop position to the specified stop position by taking the shorter
route (within "180°). When NRROA is set to 0, ROTAA
determines the direction of rotation.
The following parameters are added when the function for externally
setting incremental commands is used for position coder method spindle
orientation Refer to the Parameter Manual and each CNC manual for
details.
Parameter No.
FS0 FS15 FS16
0080
#3, 2
5609
#3, 2
3702
#3, 2
Whether the function for externally setting incremental commands is
used (#2: First spindle, #3: Second spindle)
6292 3472 4328
Command multiplication for data for externally setting incremental com-
mands
This section describes a spindle orientation function. This function is
implemented in a system consisting of an external one–rotation signal
switch (proximity switch) mounted on the spindle, and a spindle motor
having a built–in sensor and connected to the spindle with an arbitrary
gear ratio.
This function is similar to the position coder–based spindle orientation
function except for the items listed below.
1) A fixed orientation must be specified by setting 1 in bit 3 of parameter
No. 4003.
2) The detection of a one–rotation signal begins after the orientation
speed is reached.
NOTE
1 See Section 11.1.1 for descriptions about anything other
than external one–rotation signal handling (position coder
– based spindle orientation).
2 The αC series does not support this function.
11.1.3.5
Parameters
11.1.4
Spindle Orientation by
External One Rotation
Signal
11.1.4.1
General