Series 16/18/160/180-Model C Maintenance Manual, GFZ-62755EN ...

B–62755EN/017. AC SPINDLE (ANALOG INTERFACE)7.1.3Tuning S AnalogVoltage (D/A Converter)Gear 1 is used in the following explanation, although any gear may beapplied.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=0This is not required for T series.(2)Tuning offset of D/A converterCommand spindle speed 0 and tune the following prameter so thatvoltage at test point DA2 on the spindle amplifier PCB becomes 0mV.1) For M seriesS0 ; (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)DGN3731 Spindle speed (D/A converter) offset compensation value(3)Tune the gain of D/A converterCommand the maximun spindle speed of gear 1 and tune the followingparameter so that voltage at test point DA2 on the spindle amplifierPCB becomes 10.0V.1) For M seriesS; ( is a value of parameter 3741)(Specify by MDI operation and press the cycle start button.)DGN3741 Max. spindle speed of gear 1 (1–9999) [rpm]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 commandexecution. However, CW rotation command (M03) may be required onsome machines.283