
B-64120EN/01 4.DESCRIPTION OF PARAMETERS
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#7 #6 #5 #4 #3 #2 #1 #0
TCW CWM ORM PG2 PG1
3706
TCW CWM ORM GTT PG2 PG1
[Data type] Bit
PG2 and PG1 Gear ratio of spindle to position coder
Magnification PG2 PG1
×1 0 0
×2 0 1
Number of spindle
revolutions
×4 1 0
Magnification=
×8 1 1
Number of position
coder revolutions
GTT Selection of a spindle gear selection method
0: Type M.
1 : Type T.
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