Roach Conveyors 251CALR, Руководство пользователя

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15
BELT TRACKING
ERRATIC TRACKING AT START-UP
ADVANCED TRACKING ADJUSTMENTS
When adjustments noted in previous sec-
tions have been completed and belt con-
tinues to track erratically, a final series of
tracking adjustments are necessary.
The following adjustments will be made
referring to the direction of belt flow and
not the
product flow
of the conveyor.
If belt tracks toward side “R” (see illustra-
tion above), skew return rollers in direction
“B” to shift belting toward side “L”. If belt
tracks toward side “L”, skew return rollers
in direction “A” to shift belting toward
side “R”.
Skewing head pulley (pulley at unit dis-
charge) in direction “A” moves belt toward
side “L”. Skewing head pulley in direction
“B” moves belt toward side “R”.
As a rule of thumb, do not use drive and
take-up pulley for belt tracking since this
will overly increase belt tension. When
adjusting take-up pulley, adjust both sides
an equal amount.
As a last resort, shift the tail pulley in
direction “B” to move belting toward side
“L”; shift head pulley in direction “A” to
move belting toward side “L”.
CAUTION: Upon start-up, if belt tracks
to one side of unit, turn unit “OFF”, lock
out power source and confirm that con-
veyor is square and that all prime tracking
components are square with bed. Belt
tracking adjustments should be performed
by trained personnel ONLY.
Improper tracking of conveyor belting
should be considered a “systems” problem
rather than solely a deficiency in the belt.
To explain, a belt is tracked with adjust-
ments made to the conveyor rather than
just the belting.
Upon start-up, if belt tracks to one side of
unit, turn unit “OFF”, lock out power source
and confirm that conveyor is square. All
prime tracking components must be square
with bed including drive pulley, tail pulley,
snub roller and return rollers. Both sides
of take-up should be adjusted exactly the
same amount. The conveyor should be
level across the width of the unit. Confirm
that the belt has been properly threaded
(see “Belt Path” section) and that belt lac-
ing is square with the belt edges. Make
adjustments as necessary; however, all
adjustments should be made in small incre-
ments.
Start conveyor again and operate for at
least ten minutes once initial phase of
adjustments are complete. If belt continues
to track erratically, turn unit “OFF” and
proceed to following section.
CHECK LEVEL ACROSS WIDTH OF UNIT
*SEE NOTE
AT RIGHT
CAUTION:
Belt tracking adjustments
should be performed by trained personnel
ONLY. Read section on “Belt Tracking”
completely before attempting belt tracking
adjustments.
*NOTE : When making adjustments in
direction “A” or direction “B”, component
must pivot from side “L” with actual com-
ponent movement on side “R”.