4. DESCRIPTION OF PARAMETERS
B–63090EN/02
170
NOTE
1 The gear selection method differs as described below. For
details, refer to the description of spindle control in the
connection manual (function part).
Type M:
The CNC determines a proper gear from the parameter
setting and S command value, and requests the PMC to
specify the gear and its switching.
In addition, spindle control is exercised according to a
gear selected by the CNC.
Type T:
The CNC exercises spindle control according to a gear
selected by the PMC.
2 When the constant surface speed control option is selected,
type T is selected, regardless of whether this parameter is
specified.
3 When type T spindle gear switching is selected, the following
parameters have no effect:
No.3705#2 SGB, No.3751, No.3752, No.3705#3 SGT,
No.3761, No.3762, No.3705#6 SFA, No.3735, No.3736
On the other hand, parameter No. 3744 becomes usable for
ordinary spindle control.
ORM Voltage polarity during spindle orientation
0 : Positive
1 : Negative
TCW, CWM Voltage polarity when the spindle speed voltage is output
TCW CWM
Voltage polarity
0 0 Both M03 and M04 positive
0 1 Both M03 and M04 negative
1 0 M03 positive, M04 negative
1 1 M03 negative, M04 positive
#7
3707
#6 #5 #4 #3 #2 #1
P22
#0
P21
[Data type] Bit
P22 and P21 Gear ratio of spindle to second position coder
Number of spindle revolutions
Number of position coder revolutions
Magnification P22 P21
1 0 0
2 0 1
Magnification=
4 1 0
8 1 1
NOTE
This parameter is valid when the multi–spindle control option
is selected.