B-Axis Spindle Function - G490 Automatic Milling Spindle Orientation (G490) The B-Axis Head Spindle contains a curvic-coupling on the front face. This allows for the possible indexing of the milling spindle in 30˚ increments. The Doosan Puma MX series has two functions in commanding for milling spindle orientation. The G490 function automatically unclamps the milling spindle and orients to the designated degree of rotation. After orientation, the milling spindle is automatically clamped. The other function (M279) is needed to command unclamping (M101) for the milling spindle before commanding orientation and to command clamping (M100) after commanding orientation.
But this is only for maintenance by an authorized Service Engineer . Command Format Note: G490 S0 is automatically invoked during a Tool Change Sequence. It is not required to command G49 S0 prior to a Tool Change Sequence. However, all examples using the B-Axis Head will show this commanded explicitly for clarity. - 9 - G490 S