96-8100 1-15-96
150
TECHNICAL REFERENCE
SERVICE
MANUAL
VF-SERIES
3. SPINDLE OPERATION
Spindle speed is selectable from 1 to 7500 RPM. For the VF-1 through 6, speeds at and below 1250 RPM automatically
select low gear. Speeds at and above 1251 RPM automatically select high gear. Spindle speed accuracy is best at the higher
speeds and in low gear.
The spindle is hardened and ground to the precise tool holder dimensions providing an excellent fit to the holder.
3.1 SPINDLE ORIENTATION
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.
3.2 SPINDLE ORIENTATION LUBRICATION
The spindle orientation mechanism does not require regular lubrication.
3.3 SPINDLE ORIENTATION AIR SOLENOID
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.
3.4 SPINDLE ORIENTATION SEQUENCE
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) Command spindle lock air solenoid active,
6) Pause until spindle locked status is active and stable,
7) If not locked after time-out time, alarm and stop.
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