1 using the spindle synchronization feature – Rockwell Automation 8520 9/Series CNC Lathe User Manual

Page 422

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Spindles

Chapter 17

17-24

Use these three G--codes to manipulate the spindle synchronization feature:

Set spindle positional synchronization (G46)— sets the follower spindle
speed/direction and relative position offset to match the controlling

spindle.

Set active spindle speed synchronization (G46.1)— sets the follower
spindle speed/direction to match the controlling spindle.

Deactive spindle synchronization (G45)— shuts off synchronization
while maintaining the controlling and follower spindles’current speed

and direction.

Activate Spindle Positional Synchronization (G46)

Use the “Activate Spindle Positional Synchronization” to synchronize

speed and position. The position is based on a programmed S--word

(degrees). If you do not program an S--word in the G46 block, it will

automatically go to the relative positional offset, set by your system

installer. Refer to your system installer’s documentation for more

information.

During a G46, the spindles attempt to match speeds. Once the speeds are

matched, the spindles attempt to synchronize their relative positional

offset. Once synchronization is achieved, the active spindle speed and

mode (M03, M04, M05, or M19) programmed for the follower spindle is

replaced by the current controlling spindle speed and mode.

Important: Changes in spindle speeds that would normally occur as a

result of CSS or other programmed changes to spindle speeds, directions,

and spindle speed override will not occur until synchronization is achieved.

The format for the G46 block is as follows:

G46S__;

Where:

Defines:

S

the angular offset between two spindles (degrees)*

*The range for the S--word is 0 to 360. Your system installer defines where 0_ is for each

spindle. The value defined as the offset value is absolute and independent of spindle direction.

Important: No other program letters are allowed in the G46 block except

auxiliary letters and system installer M--codes.

17.6.1

Using the Spindle

Synchronization Feature

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