8541

Common Causes

• Phase sync commanded while one of the spindles was still rotating, indexing, or executing an S command
• One spindle in C-axis mode, flat-turning mode, synchronous mode, or lowest speed mode when sync was commanded
• Spindle gear in neutral on either spindle
• Chuck open on the spindle commanding the phase sync (Code 25)
• MacTurn-W/H2 turret: subspindle not in the lower position (Code 30)

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code 11 = Target spindle is rotating; code 12 = Target spindle is indexing; code 13 = Target spindle is in C-axis mode; code 14 = Target spindle is executing an S command; code 16 = Target spindle gear is in neutral; code 17 = Target spindle is in flat-turning mode; code 18 = Target spindle is in synchronous mode; code 19 = Target spindle is in lowest speed mode
2. 2Read the alarm code: codes 11-1A describe a fault state on the spindle being phased (target side); codes 21-2A describe the same states on the spindle issuing the phase sync; code 30 is the MacTurn-W subspindle position condition.
3. 3Codes 11/21 (rotating) or 14/24 (S command active): command spindle stop (M05) on the affected spindle and confirm zero speed before issuing the phase sync command.
4. 4Codes 12/22 (indexing) or 13/23 (C-axis mode): cancel spindle indexing and C-axis mode before commanding phase synchronization.
5. 5Codes 16/26 (gear neutral): engage a valid spindle gear range; phase sync is blocked while the gear is in neutral.
6. 6Code 25: close the chuck on the commanding spindle and verify the chuck close confirmation before issuing phase sync.
7. 7Codes 17/27, 18/28, 19/29, 1A/2A: cancel flat-turning, synchronous, lowest-speed, or the existing phase-sync mode on the indicated spindle, then reissue the command. Code 30: move the subspindle to its lower position first.