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CONTINUED FROM PAGE 4.
CONTROL STATIONS
A) Control stations should be so arranged and located that the operation of
the equipment is visible from them, and shall be clearly marked or labeled to
indicate the function controlled.
B) A conveyor which would cause injury when started shall not be started
until employees in the area are alerted by a signal or by a designated person
that the conveyor is about to start.
When a conveyor would cause injury when started and is automatically
controlled or must be controlled from a remote location, an audible device
shall be provided which can be clearly heard at all points along the conveyor
where personnel may be present. The warning device shall be actuated by
the controller device starting the conveyor and shall continue for a required
period of time before the conveyor starts. A flashing light or similar visual
warning may be used in conjunction with or in place of the audible device if
more effective in particular circumstances.
Where system function would be seriously hindered or adversely affected
by the required time delay or where the intent of the warning may be misinter-
preted (i.e., a work area with many different conveyors and allied devices),
clear, concise, and legible warning shall be provided. The warning shall
indicate that conveyors and allied equipment may be started at any time, that
danger exists, and that personnel must keep clear. The warnings shall be
provided along the conveyor at areas not guarded by position or location.
C) Remotely and automatically controlled conveyors, and conveyors where
operator stations are not manned or are beyond voice and visual contact from
drive areas, loading areas, transfer points, and other potentially hazardous
locations on the conveyor path not guarded by location, position, or guards,
shall be furnished with emergency stop buttons, pull cords, limit switches, or
similar emergency stop devices.
All such emergency stop devices shall be easily identifiable in the imme-
diate vicinity of such locations unless guarded by location, position, or guards.
Where the design, function, and operation of such conveyor clearly is not
hazardous to personnel, an emergency stop device is not required.
The emergency stop device shall act directly on the control of the con-
veyor concerned and shall not depend on the stopping of any other equip-
ment. The emergency stop devices shall be installed so that they cannot be
overridden from other locations.
D) Inactive and unused actuators, controllers, and wiring should be removed
from control stations and panel boards, together with obsolete diagrams, indi-
cators, control labels, and other material which serve to confuse the opera-
tor.
SAFETY DEVICES
A) All safety devices, including wiring of electrical safety devices, shall be
arranged to operate in a "fail-Safe" manner, that is, if power failure or failure
of the device itself would occur, a hazardous condition must not result.
B) emergency stops and restarts. Conveyor controls shall be so arranged
that, in case of emergency stop, manual reset or start at the location where
the emergency stop was initiated, shall be required of the conveyor(s) and
associated equipment to resume operation.
C) Before restarting a conveyor which has been stopped because of an
emergency, an inspection of the conveyor shall be made and the cause of
the stoppage determined. The starting device shall be locked out before any
attempt is made to remove the cause of stoppage, unless operation is neces-
sary to determine the cause or to safely remove the stoppage.
Refer to ANSI z244.1-1982, American National Standard for Personnel
Protection – Lockout/Tagout of Energy Sources – Minimum Safety
Requirements and OSHA Standard Number 29 CfR 1910.147 "The Control
of Hazardous Energy (Lockout/Tagout)."
OPERATION
• Conveyor Start-Up
Before conveyor is turned on, check for foreign objects that may have been
left inside conveyor during installation. These objects could cause serious
damage during start-up.
After conveyor has been turned on and is operating, check motors, reducers,
and moving parts to make sure they are working freely.
Because of the many moving parts on the conveyor, all personnel in the
area of the conveyor need to be warned that the conveyor is about to be
started.
CAUTION!
MAINTENANCE
• Lubrication
The drive chain is pre-lubricated from the manufacturer by a hot dipping
process that ensures total lubrication of all components. However, continued
proper lubrication will greatly extend the useful life of every drive chain.
drive Chain lubrication serves several purposes including:
• Protecting against wear of the pin-bushing joint
• Lubricating chain-sprocket contact surfaces
• Preventing rust or corrosion
for normal operating environments, lubricate every 2080 hours of operation
or every 6 months, whichever comes first. Lubricate with a good grade of
petroleum or synthetic oil (i.e., Shell Rotella or Mobil 1). for best results,
always use a brush to generously lubricate the chain. The proper viscos-
ity of lubricant greatly affects its ability to flow into the internal areas of the
chain. Refer to the table below for the proper viscosity of lubricant for your
application.
The drive chain's lubrication requirement is greatly affected by the operating
conditions. for harsh conditions such as damp environments, dusty environ-
ments, excessive speeds, or elevated temperatures, it is best to lubricate
more frequently. It may be best, under these conditions, to develop a custom
lubrication schedule for your specific application. A custom lubrication sched-
ule may be developed by inspecting the drive chain on regular time intervals
for sufficient lubrication. Once the time interval is determined at which the
chain is not sufficiently lubricated, lubricate it and schedule the future lubrica-
tion intervals accordingly.
Ambient Temperature
degrees f
20-40
40-100
100-120
• Belt Tracking
HOW IS THE CONVEYOR BELT TRACKEd
The belt is tracking by adjusting: drive Pulley, Tail Pulley, Return Idlers, and
Snub Idlers. The same tracking principles apply to conveyors supplied with
end drives, center drives, or underside take-ups.
PRE-TRACKING INSPECTION
Before attempting to physically track the belt:
1. Make sure conveyor is level across the width and length of unit. Adjust
supports as necessary.
2. Check to make sure: drive Pulley, Tail Pulley, Snub Idlers, and all Return
Idlers are square with conveyor bed. See illustrations figure 7A, 7B, 7C, and
7d. dimension "A" should be equal on both sides of unit.
3. Make sure belt has been properly threaded through conveyor. See pages
4,5.
4. Make sure belt lacing has been installed correctly and is square with the
belt. See pages 4,5.
5. Check for improper loading. feed should be in direction of belt travel,
centered on belt.
IMPORTANT: When belt tracking adjustments are made, they should be
minor (1/16 in. at a time on idlers, etc., should be sufficient.).
Give the belt adequate time to react to the adjustments. It may take several
complete revolutions around the conveyor for the belt to begin tracking prop-
erly on long, slow conveyor lines.
A) Stand at tail pulley looking toward drive and note what direction belt is
traveling.
B) Having observed belt and determined tracking problem, follow procedures
in "How to Steer The Belt", figure 7d.
HOW TO STEER THE bELT
Condition 1. . .When the belt is running in the direction (fLOW) with the arrow,
but tracking (drifting) towards Side "X", move the Snub Idler nearest the
INfEEd end of Side "Y" towards the dISCHARGE end of the conveyor.
Condition 2. . . When the belt is running in the direction (fLOW) with the
arrow, but tracking (drifting) towards Side "Y", move the Snub Idler nearest
the INfEEd end of Side "X" towards the dISCHARGE end of the conveyor.
If Belt direction (fLOW) is reversed, all the above conditions will remain the
same as in 7d, except you are now viewing the conveyor from the opposite
end.
If belt continues to track improperly, re-check all items covered in "Pre-
Tracking Inspection" and make corrections as necessary.
6
SAE
ISO
20
46 or 68
30
100
40
150
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