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

1. DISPLAY AND OPERATION OF CRT/MDI B–62755EN/01 Two–spindle polygonmachining(T series only)470#7SC0This data indicates the status of the polygon synchronization mode.#6LGE#5 #4SCF#3 #2 #1PST#0SPL#0 (SPL): Spindle polygon synchronization is in progress.#1 (PST): Spindle polygon synchronization mode is starting.#2: Spindle polygon synchronization mode is being released.#3: The spindle speed is being changed in spindle polygon synchronizationmode.#4 (SCF): The spindle speed has been changed in spindle polygon synchronizationmode.#5: Not used#6 (LGE): In spindle polygon synchronization mode, the two spindles have differentloop gains.#7 (SC0): In spindle polygon synchronization mode, the specified speed is zero.CAUTION If SPL and SCF are set to 1 and #1, #2, and #3 are set to 0 in polygon synchronization mode,the operation is normal. If the status does not change, even though PST is set to 1 and the program is stopped in a blockincluding G51.2, one of the spindles cannot attain the polygon synchronization speed. Thismay occur when the spindle cannot be activated because the PSTU bit (bit 7 of parameter No.7603) is set to 0. LGE is set to 1 when the speed is changed in polygon synchronization mode if the serial spindlecontrol unit uses different loop gains for the first and second spindles during spindlesynchronization.When this function is used, the two spindles must be controlled with an identical loop gain. Thewarning is displayed in DGN, but the warning does not cause an alarm. (The serial spindlecontrol unit switches parameters according to the statuses of CTH1, CTH2, and other signals.) SCO is set to 1 if either of the following occurs: The combination of the programmed S valueand spindle control signals including *SSTP , SOV0 to SOV7 andmultispindle control signal causes 0 or a value smaller than the resolution of spindlecontrol to be programmed (the programmed value multiplied by 4095/highest–spindle–speedis smaller than 1).Alternatively, SIND control is used and the programmed output is 0.When SCO is set to 1, the spindle speed becomes 0, setting bit 0 of DGN 471 to 1 and disablingthe ratio of polygon synchronization rotation. This, however, is handled as a result of theprogram, and does not cause P/S alarm No. 5018.60