BAM 1020-9800 Manual Rev W.docx
Page 71
These are the sensors which monitor tape breakage and tape tensioning. The left side
tensioner assembly has no photosensors.
CAPSTAN:
This screen tests the photosensor which watch the rotation of the Capstan shaft
motor. This is the shaft under the rubber pinch rollers which drives the filter tape forwards and
backwards. Press the ADVANCE soft-key to rotate the Capstan counter-clockwise, and the
BACKUP soft-key to rotate clockwise. The shaft should turn one-half of a rotation each time.
Photo sensor S8 should turn ON to stop the shaft at each half-turn, and will be OFF while the
shaft is turning. It is helpful to put an ink mark on the end of the shaft to view the rotation.
LATCH:
This screen shows the status of the pinch roller latch. If the rollers are latched
in the UP position, then S9 should be ON. S9 should turn OFF if the latch is unhooked.
REF:
This screen tests the two photo sensors which monitor the position of the
reference membrane assembly. When the EXTEND soft-key is pressed the membrane
should extend and the S2 photo sensor should be ON, and S3 OFF. When the WITHDRAW
soft-key is pressed the membrane should withdraw and the S2 photo sensor should be OFF
and S3 ON. It takes a few seconds for the membrane to move.
Tape Transport Assembly
7.17 HEATER Test Menu
The TEST > HEATER screen is used to force the Smart Heater ON or OFF for testing
purposes. The heater takes several minutes to heat up or cool down noticeably. The heater
automatically turns back off upon exit from the screen.
7.18 FILTER-T Test Menu
– Filter Temperature Sensor Tests
The TEST > FILTER-T screen is used to check or calibrate the filter temperature sensor
located in the air stream beneath the filter tape. When this screen is entered, the BAM will
automatically raise the nozzle and turn the pump on. This allows ambient room air to
equilibrate the filter temperature sensor. Allow the pump to run for at least 5 minutes to allow
the sensor to equilibrate. When fully equilibrated, the filter temperature should match ambient
Right Tensioner Idler
with tape break and
tension photosensors
Shuttle Beam
with shuttle photosensor
Tape Supply Reel
with motor
Tape Take-Up Reel
with motor
Shuttle Beam
connected to other side
Left Tensioner Idler
no photosensors
Pinch Roller Latch
with latch photosensor
Nozzle
with motor and two nozzle
photosensors
Capstan Shaft
with motor and photosensor
Reference Membrane
with motor and two
photosensors (back side)
