96-8100 1-15-96
HAAS AUTOMATION, INC.
TROUBLESHOOTING
SERVICE
MANUAL
VF-SERIES
18
4.4 NOISY OPERATION
To isolate noise(s) in the ATC, carefully observe the ATC in operation and look for the following:
´ ATC makes noise as the shuttle moves.
l Check the adjustment of the roller bolts on the ATC ("Roller Bolt Replacement" section). Loose roller bolts can cause the
ATC to make a clunking noise when the shuttle is commanded to move. Tight roller bolts can cause the shuttle motor
to labor excessively, possibly damaging the motor or the I/O board. In this case, the shuttle may also move too slowly.
l Check for damage to the trap door on the ATC cover. See appropriate section for trap door replacement.
l Check for missing plastic riders on the ATC shutter. See "ATC Trap Door Replacement" for shutter replacement.
l Ensure the guide pin mounted to the holding plate is not bent and does not scrape the ATC cover during movement. See
"ATC Trap Door Replacement" for guide pin replacement.
l Listen for damage to the gear train in the shuttle motor. If the motor is found to be the source of the noise, replace the
motor ("Shuttle Motor Removal" section). DO NOT try to repair the motor or to further isolate the noise in the motor.
ATC makes noise during carousel rotation.
l Check to ensure the Geneva driver on the turret motor is tight and properly adjusted ("Shuttle Motor Removal" section).
If the Geneva driver is found to be loose, check for damage to the Geneva star. Any roughness in the slots will require
that it be replaced ("Geneva Star Replacement" section).
l Check the adjustment of the Geneva driver in relation to the Geneva star ("Geneva Star Replacement" section). If the
adjustment is too loose, the carousel will vibrate heavily and make a loud clanking noise during carousel rotation. If the
adjustment is too tight, the turret motor will labor excessively and the carousel may appear to move erratically.
NOTE: If the turret motor adjustment is tight for extended periods, the turret motor, Geneva star, and the I/O board may
be damaged. If the adjustment of the Geneva star appears tight at some pockets and loose at others, the problem lies
with the Geneva star. Check the concentricity of the star relative to the bearing housing on the carousel assembly. If the
concentricity of the star is proven to within specification and the problem still persists, the Geneva star must be replaced
("Geneva Star Replacement" section).
l Ensure the screws holding the turret motor to the mounting plate are tight ("Turret Motor Removal" section).
l Ensure the screws attaching the motor mounting plate to the shuttle casting are tight.
l Check for excessive noise in the gear train of the turret motor. See appropriate section for turret motor replacement.
NOTE: If the motor is found to be the source of noise, replace the motor assembly (motor, mounting plate, and Geneva
driver).
DO NOT attempt to repair the motor or to further isolate the problem in the motor.
To Next Page
Loading...
Need help?
General
