96-8100
1-15-96
HAAS
AUTOMATION, INC.
TROUBLESHOOTING
S E R V I C E M A N U A L
VF-S
ERIES
6
2. SPINDLE
2.1 NOT TURNING
´
Spindle not turning.
l
If there are any alarms, refer to "Alarms" section
l
Check that the spindle turns freely when machine is off.
l
If motor turns but spindle does not, see "Belt Assembly" and "Spindle Motor & Transmission" sections.
l
Command spindle to turn at 1800 RPM and check spindle drive display. If display blinks bb, check spindle orienta
tion switch ("Spindle Orientation" section). If spindle drive does not light the RUN LED, check forward/reverse
commands from IOPCB ("Electrical Service").
l
Check the wiring of analog speed command from MOTIF PCB to spindle drive (cable 720).
l
If spindle is still not turning, replace MOTIF PCB ("Electrical Service").
l
If spindle is still not turning, replace spindle drive ("Electrical Service").
l
Check for rotation of the gearbox (VF-1, VF-2, VF-3) or the motor (VF-0). If the motor or gearbox operates, check the
drive belt ("Belt Assembly" section).
l
Disconnect the drive belt. If the spindle will not turn, it is seized and must be replaced ("Spindle Assembly" section).
NOTE:
Before using the replacement spindle, the cause of the previous failure must be determined.
2.2 NOISE
Most noises attributed to the spindle actually lie in the motor/gearbox or drive belt of the machine. Isolate the sources of
noise as follows:
´
Excessive noise coming from the spindle head area.
On VF-1 through 6 models, first determine if the noise is related to the RPM of the motor or the RPM of the spindle. For
example: If the noise appears at 2000 RPM in high gear, listen for a similar noise at 500 RPM in low gear. If the same noise
persists, the problem lies with the gearbox. If the noise disappears, the problem could be either the gearbox or the spindle,
and further testing is necessary.
l
Remove the head covers and check the machines drive belt tension ("Tension Adjustment" section).
Ø
If the noise persists, turn the drive belt over on the pulleys. If the noise is significantly different, the belt
is at fault. Replace the belt ("Belt Assembly" section).
Ø
If the noise does not change, remove the belt and go on to the next step.
l
Check the pulleys for excessive runout (more than 0.003" axial or radial).
l
Run the motor (VF-0) or the gearbox (VF-1, VF-2, VF-3) with the drive belt disconnected. If the noise persists,
the problem lies with the gearbox/motor. If it disappears, go on to the next step.
l
Check for the correct amount of lubrication to the spindle bearings (0.5-1.0 cc every two hours) in a an air mist-
lubricated spindle.
Ø
If the spindle is not getting lubrication, correct the problem per the lube and air diagram at the back of this
manual and replace the spindle ("Spindle Assembly" section).
Ø
If the spindle is getting lubrication, replace the spindle ("Spindle Assembly" section).
Summary of Contents for VF-SERIES
Page 180: ...1 15 96 96 8100 177 TABLEOFCONTENTS TECHNICAL REFERENCE SERVICE M A N U A L VF SERIES ...
Page 235: ...96 8100 1 15 96 232 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 1 COLUMN ...
Page 237: ...96 8100 1 15 96 234 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 1 LEADSCREW ...
Page 239: ...96 8100 1 15 96 236 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 3 COLUMN ...
Page 241: ...96 8100 1 15 96 238 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 3 LEADSCREW ...
Page 245: ...96 8100 1 15 96 242 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS 3 4 2 1 ...