
B–62755EN/01
7. AC SPINDLE (ANALOG INTERFACE)
283
Gear 1 is used in the following explanation, although any gear may be
applied.
For the T series, select gear 1 manually or an M code.
(1)For M series, change upper and lower limit as follows:
⋅ For gear change method A: PRM 3736=4095, PRM 3735=0
⋅ For gear change method B: PRM 3751=4095, PRM 3735=0
This is not required for T series.
(2)Tuning offset of D/A converter
Command spindle speed 0 and tune the following prameter so that
voltage at test point DA2 on the spindle amplifier PCB becomes 0mV.
1) For M series
S0 ; (Command by MDI operation and press the cycle start button)
2) For T series (In case of G code system A)
G97 S0 ; (Command by MDI operation as the same as M series)
3731 Spindle speed (D/A converter) offset compensation value
DGN
(3)Tune the gain of D/A converter
Command the maximun spindle speed of gear 1 and tune the following
parameter so that voltage at test point DA2 on the spindle amplifier
PCB becomes 10.0V.
1) For M series
S; ( is a value of parameter 3741)
(Specify by MDI operation and press the cycle start button.)
3741 Max. spindle speed of gear 1 (1–9999) [rpm]
DGN
2) For T series (G code system A)
G97 S; ( is a value of parameter 3741)
(Specify by MDI operation and press the cycle start button.)
Usually a voltage is output from the D/A converter by only an S command
execution. However, CW rotation command (M03) may be required on
some machines.
7.1.3
Tuning S Analog
Voltage (D/A Converter)