PS5018 Polygon Spindle Speed Error (T Series)
(T Series) In G51.2 mode, the speed of the spindle or polygon synchronous axis either exceeds the clamp value or is too small. The specified rotation speed ratio thus cannot be maintained. For polygon turning between spindles: More information as to why this alarm occurred is indicated in DGN No. 471.
Check DGN No. 471 for details of alarm.