TECHNICAL REFERENCE
447
June 1999
96-8000
SPINDLE O RIENTATION
Orientation of the spindle is automatically performed for tool changes and can be programmed with M19.
Orientation is performed by turning the spindle slowly until an air pressure driven pin drops into a detent and
locks the spindle in place. This pin is located behind the spindle motor and above the gear box. If the spindle is
oriented and locked, commanding spindle forward or reverse will release the lock.
On machines equipped with a Haas vector drive, orientation is performed electrically and no shot pin or
solenoid is required for locking the motor in place. Orientation of the spindle is automatically performed for tool
changes and can be programmed with M19 commands. Orientation is performed by turning the spindle until the
encoder reference is reached , the spindle motor holds the spindle locked in position. If the spindle is orien-
tated and locked, commanding spindle forward or reverse will release the lock.
SPINDLE O RIENTATION L UBRICATION
The spindle orientation mechanism does not require regular lubrication.
SPINDLE O RIENTATION A IR S OLENOID ( WITH S HOT P IN)
A solenoid controls the air valve supplying pressure to the orientation lock pin. The diagnostic display can be
used to display the status of the relay output and the switch inputs. Circuit breaker CB4 will interrupt power to
this solenoid.
SPINDLE O RIENTATION S EQUENCE
When spindle orientation is commanded, the following sequence of operations occurs:
1) If the spindle is turning, it is commanded to stop,
2) Pause until spindle is stopped,
3) Spindle orientation speed is commanded forward,
4) Pause until spindle is at orientation speed,
5) (Vector drive only) Spindle encoder rotates past a reference mark,
6) (Vector drive only) The spindle drive stops and holds the spindle position at a parameter
distance from the reference mark,
7) Command spindle lock air solenoid active,
8) Pause until spindle locked status is active and stable,
9) If not locked after time-out time, alarm and stop.
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