Sterling 060 User manual

Brand: Sterling

Model: 060

Category: Blenders

Type: User manual

This manual is also suitable for

________________________________

Continuous Loss-in-Weight Blenders

with

Allen-Bradley SLC 5/04 Programmable Controller

and

PanelView 600 Touch Screen Interface

Part Number: 882.092698.00

Bulletin Number: BF3-615

Effective: 9/1/08

Write Down Your Serial Numbers Here For Future Reference:

_________________________ _________________________

We are committed to a continuing program of product improvement.

Specifications, appearance, and dimensions described in this manual are subject to change without notice.

DCN No. ____________

Continuous Loss-in-Weight Blenders ii

Shipping Information

Unpacking and Inspection

You should inspect your equipment for possible shipping damage. Thoroughly check the

equipment for any damage that might have occurred in transit, such as broken or loose wiring and

components, loose hardware and mounting screws, etc.

In the Event of Shipping Damage

According to the contract terms and conditions of the Carrier, the responsibility of the Shipper

ends at the time and place of shipment.

Notify the transportation company’s local agent if you discover damage

Hold the damaged goods and packing material for the examining agent’s inspection. Do not

return any goods before the transportation company’s inspection and authorization.

File a claim with the transportation company. Substantiate the claim by referring to the agent’s

report. A certified copy of our invoice is available upon request. The original Bill of Lading is

attached to our original invoice. If the shipment was prepaid, write us for a receipted

transportation bill.

Advise customer service regarding your wish for assistance and to obtain an RMA (return

material authorization) number.

If the Shipment is Not Complete

Check the packing list as back-ordered items are noted on the packing list. In addition to the

equipment itself, you should have:

; Bill of lading

; Packing list

; Operating and Installation packet

; Electrical schematic and panel layout drawings

; Component instruction manuals (if applicable)

Re-inspect the container and packing material to see if you missed any smaller items during

unpacking.

If the Shipment is Not Correct

If the shipment is not what you ordered, contact the Parts and Service Department

immediately. Have the order number and item number available.

Hold the items until you receive an RMA number# and shipping instructions.

Returns

Do not return any damaged or incorrect items until you receive shipping instructions from the

shipping department.

Continuous Loss-in-Weight Blenders iii

Credit Returns

Prior

to the return of any material, authorization must be given by the manufacturer. A RMA

number will be assigned for the equipment to be returned.

Reason for requesting the return must be given.

ALL

returned material purchased from the manufacturer returned is subject to 15% ($75.00

minimum) restocking charge.

ALL

returns are to be shipped prepaid.

The invoice number and date or purchase order number and date must be supplied.

No credit will be issued for material that is not within the manufacturer’s warranty period and/or

in new and unused condition, suitable for resale.

Warranty Returns

Prior

to the return of any material, authorization must be given by the manufacturer. A RMA

number will be assigned for the equipment to be returned.

Reason for requesting the return must be given.

All

returns are to be shipped prepaid.

The invoice number and date or purchase order number and date must be supplied.

After inspecting the material, a replacement or credit will be given at the manufacturer’s

discretion. If

the item is found to be defective in materials or workmanship, and it was

manufactured by our company, purchased components are covered under their specific warranty

terms.

Continuous Loss-in-Weight Blenders iv

Table of Contents

CHAPTER 1: SAFETY .................................................................6

1-1 How to use this manual...............................................................................................6

Safety symbols used in this manual......................................................................6

1-2 Warnings and precautions...........................................................................................8

1-3 Responsibility..............................................................................................................9

General responsibility............................................................................................9

Operator responsibility.........................................................................................10

Maintenance responsibility..................................................................................11

Reporting a safety defect ....................................................................................11

CHAPTER 2: FUNCTIONAL DESCRIPTION............................12

2-1 Models covered in this manual..................................................................................12

2-2 General description...................................................................................................12

Accessories.........................................................................................................12

Customer service ................................................................................................12

2-3 Typical features & components.................................................................................13

Mechanical features ............................................................................................13

Controller features...............................................................................................13

Electrical features................................................................................................13

Blender system component description...............................................................14

2-4 Options......................................................................................................................19

2-5 Safety devices and interlocks....................................................................................20

CHAPTER 3: INSTALLATION ...................................................22

3-1 Uncrating the equipment...........................................................................................22

3-2 Rigging and placing the unit......................................................................................22

Site requirements ................................................................................................23

Mounting configuration........................................................................................23

3-3 Electrical installation..................................................................................................26

3-4 Pneumatic installation ...............................................................................................27

3-5 Overall installation (summary)...................................................................................28

3-6 Set-up........................................................................................................................29

Load cell adjustment ...........................................................................................29

Final connections ................................................................................................30

Controller setup...................................................................................................31

Scale calibration..................................................................................................31

............................................................................................................................44

CHAPTER 4: OPERATION ........................................................47

4-1 Start-up......................................................................................................................47

General operation................................................................................................47

4-2 Controller description & operation.............................................................................49

Display description..............................................................................................49

Setting a recipe ...................................................................................................51

Continuous Loss-in-Weight Blenders v

MAINTENANCE..........................................................................52

Preventative maintenance schedule....................................................................................52

APPENDIX..................................................................................54

6-1 Warranty and spare parts.............................................................................................54

Annex B information.....................................................................................................55

6-2 Addendum (Service supervisor information).................................................................55

Programmable settings........................................................................................56

6-3 Technical assistance .....................................................................................................63

Continuous Loss-in-Weight Blenders Chapter 1: Safety 6

Allen-Bradley Controls

Chapter 1: Safety

1-1 How to Use This Manual

Use this manual as a guide and reference for installing, operating, and maintaining your

Continuous Loss-in-weight Blender. The purpose is to assist you in applying efficient,

proven techniques that enhance equipment productivity.

This manual covers only light corrective maintenance. No other maintenance should be

undertaken without first contacting a service engineer.

The Functional Description section outlines models covered, standard features, and safety

features. Additional sections within the manual provide instructions for installation, pre-

operational procedures, operation, preventive maintenance, and corrective maintenance.

The Installation chapter includes required data for receiving, unpacking, inspecting, and setup

of the blender. We can also provide the assistance of a factory-trained technician to help train

your operator(s) for a nominal charge. This section includes instructions, checks, and

adjustments that should be followed before commencing with operation of the Continuous

Loss-in-Weight Blender. These instructions are intended to supplement standard shop

procedures performed at shift, daily, and weekly intervals.

The Operation chapter includes a description of electrical and mechanical controls, in

addition to information for operating the unit safely and efficiently.

The Maintenance chapter is intended to serve as a source of detailed assembly and

disassembly instructions for those areas of the equipment requiring service. Preventive

maintenance sections are included to ensure that your Continuous Loss-in-Weight Blender

provides excellent, long service.

The Troubleshooting chapter serves as a guide for identification of most common problems.

Potential problems are listed, along with possible causes and related solutions.

The Appendix contains technical specifications, drawings, schematics, parts lists, and

available options. A spare parts list with part numbers specific to your machine is provided

with your shipping paperwork package. Refer to this section for a listing of spare parts for

purchase. Have your serial number and model number ready when ordering.

Safety Symbols Used in this Manual

The following safety alert symbols are used to alert you to potential personal injury hazards.

Obey all safety messages that follow these symbols to avoid possible injury or death.

DANGER! DANGER indicates an imminently hazardous situation that, if not

avoided, will result in death or serious injury.

WARNING! WARNING indicates a potentially hazardous situation or practice that,

if not avoided, could result in death or serious injury.

Caution! CAUTION indicates a potentially hazardous situation or practice that,

if not avoided, may result in minor or moderate injury or in property

damage.

Continuous Loss-in-Weight Blenders Chapter 1: Safety 7

Continuous Loss-in-Weight Blender Safety Tags

Tag Description Tag Description

Pinch Point - Slide

Gate

Read Operation &

Installation Manual

Shear Point - Rotating

Mixer or Agitator

Earth Ground

High Voltage Inside

Enclosure

Protected Earth Ground

Shear Hazard -

Rotating Auger

Lifting Point

Continuous Loss-in-Weight Blenders Chapter 1: Safety 8

1-2 Warnings and Precautions

Our equipment is designed to provide safe and reliable operation when installed and operated

within design specifications, following pertinent local and national codes. This may include,

but is not limited to OSHA, NEC, NFPA, CSA, UL, CE, SPI, and any other local, national

and international regulations.

To avoid possible personal injury or equipment damage when installing, operating, or

maintaining this equipment, use good judgment and follow these safe practices:

; Read and follow these operation and installation instructions when installing,

operating, and maintaining this equipment. If these instructions become

damaged or unreadable, additional copies are available from the manufacturer.

; Follow all SAFETY CODES.

; Keep fingers away from slide gates, augers, clean-outs, and calibration hatches.

Automatic operation may start unexpectedly, A PINCH HAZARD CAPABLE OF

CAUSING BODILY INJURY EXISTS ANY TIME THE POWER IS ON.

; Wear SAFETY GLASSES and WORK GLOVES.

; Work only with approved tools and devices.

; Disconnect and/or lock out power and compressed air before servicing or maintaining

the equipment.

; Use care when LOADING, UNLOADING, RIGGING, or MOVING this

equipment.

; Operate this equipment within design specifications.

; OPEN, TAG, and LOCK ALL DISCONNECTS before working on equipment.

You should remove the fuses and carry them with you.

; NEVER PUT FINGERS OR TOOLS IN AN AUGER OR SLIDE GATE AREA.

; Make sure the equipment and components are properly GROUNDED before you

switch on power.

; Do not restore power until you remove all tools, test equipment, etc., and the

equipment and related components are fully reassembled.

; Only PROPERLY TRAINED personnel familiar with the information in this

manual should work on this equipment.

We have long recognized the importance of safety and have designed and manufactured our

equipment with operator safety as a prime consideration. We expect you, as a user, to abide

by the foregoing recommendations in order to make operator safety a reality.

Continuous Loss-in-Weight Blenders Chapter 1: Safety 9

1-3 Responsibility

These machines are constructed for maximum operator safety when used under standard

operating conditions and when recommended instructions are followed in the maintenance

and operation of the machine.

All personnel engaged in the use of the machine should become familiar with its operation as

described in this manual.

Proper operation of the machine promotes safety for the operator and all workers in its

vicinity.

Each individual must take responsibility for observing the prescribed safety rules as outlined.

All warning and danger signs must be observed and obeyed. All actual or potential danger

areas must be reported to your immediate supervisor.

General Responsibility

No matter who you are, safety is important. Owners, operators and maintenance personnel

must realize that safety is always a vital part of their jobs.

If your main concern is loss of productivity, remember that production is always affected in a

negative way following an accident. The following are some of the ways that accidents can

affect your production:

• Loss of a skilled operator (temporarily or permanently)

• Breakdown of shop morale

• Costly damage to equipment

• Downtime

An effective safety program is responsible and economically sound.

Organize a safety committee or group, and hold regular meetings. Promote this group from

the management level. Through this group, the safety program can be continually reviewed,

maintained, and improved. Keep minutes or a record of the meetings.

Hold daily equipment inspections in addition to regular maintenance checks. You will keep

your equipment safe for production and exhibit your commitment to safety.

Please read and use this manual as a guide to equipment safety. This manual contains safety

warnings throughout, specific to each function and point of operation.

Continuous Loss-in-Weight Blenders Chapter 1: Safety 10

Operator Responsibility

The operator’s responsibility does not end with efficient production. The operator usually has

the most daily contact with the equipment and intimately knows its capabilities and

limitations.

Plant and personnel safety is sometimes forgotten in the desire to meet incentive rates, or

through a casual attitude toward machinery formed over a period of months or years. Your

employer probably has established a set of safety rules in your workplace. Those rules, this

manual, or any other safety information will not keep you from being injured while operating

your equipment.

Learn and always use safe operation. Cooperate with co-workers to promote safe practices.

Immediately report any potentially dangerous situation to your supervisor or appropriate

person.

REMEMBER:

• NEVER place your hands or any part of your body in any dangerous location.

• NEVER operate, service, or adjust the blender without appropriate training and first

reading and understanding this manual.

• NEVER try to pull material out of the blender with your hands while it is running!

• Before you start the blender check the following:

o Remove all tools from the unit;

o Be sure no objects (tools, nuts, bolts, clamps, bars) are laying in the

metering or mixing area;

• If your blender has been inoperative or unattended, check all settings before starting

the unit.

• At the beginning of your shift and after breaks, verify that the controls and other

auxiliary equipment are functioning properly.

• Keep all safety guards in place and in good repair. NEVER attempt to bypass, modify,

or remove safety guards. Such alteration is not only unsafe, but will void the warranty

on your equipment.

• When changing control settings to perform a different mode of operation, be sure

selector switches are correctly positioned. Locking selector switches should only be

adjusted by authorized personnel and the keys removed after setting.

• Report the following occurrences IMMEDIATELY:

o unsafe operation or condition

o unusual blender action

o leakage

o improper maintenance

• NEVER stand or sit where you could slip or stumble into the blender while working

on it.

• DO NOT wear loose clothing or jewelry, which can be caught while working on a

blender. In addition, cover or tie back long hair.

Continuous Loss-in-Weight Blenders Chapter 1: Safety 11

• Clean the blender and surrounding area DAILY, and inspect the machine for loose,

missing or broken parts.

• Shut off power to the blender when it is not in use. Turn the switch to the OFF

position, or unplug it from the power source.

Maintenance Responsibility

Proper maintenance is essential to safety. If you are a maintenance worker, you must make

safety a priority to effectively repair and maintain equipment.

Before removing, adjusting, or replacing parts on a machine, remember to turn off all electric

supplies and all accessory equipment at the machine, and disconnect and lockout electrical

power. Attach warning tags to the disconnect switch.

When you need to perform maintenance or repair work on a blender above floor level, use a

solid platform or a hydraulic elevator. If there is a permanently installed catwalk around your

blender, use it. The work platform should have secure footing and a place for tools and parts.

DO NOT climb on unit, machines, or work from ladders.

If you need to repair a large component, use appropriate handling equipment. Before you use

handling equipment (portable “A” frames, electric boom trucks, fork trucks, overhead cranes)

be sure the load does not exceed the capacity of the handling equipment or cause it to become

unstable.

Carefully test the condition of lifting cables, chains, ropes, slings, and hooks before using

them to lift a load.

Be sure that all non-current carrying parts are correctly connected to earth ground with an

electrical conductor that complies with current codes. Install in accordance with national and

local codes.

When you have completed the repair or maintenance procedure, check your work and remove

your tools, rigging, and handling equipment.

Do not restore power to the blender until all persons are clear of the area. DO NOT start and

run the unit until you are sure all parts are functioning correctly.

BEFORE you turn the blender over to the operator for production, verify all enclosure

panels, guards and safety devices are in place and functioning properly.

Reporting a Safety Defect

If you believe that your equipment has a defect that could cause injury, you should

immediately discontinue its use and inform the manufacturer.

The principle factors that can result in injury are failure to follow proper operating procedures

(i.e. lockout/tagout), or failure to maintain a clean and safe working environment.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 12

Chapter 2: Functional Description

2-1 Models Covered in This Manual

This manual provides operation, installation, and maintenance instructions for continuous

loss-in-weight blenders of various blending rates and specifications. See Figure 1 below for a

list of available models and specifications.

Figure 1: Models Covered by this Manual (√ - Denotes Availability)

Model

015

060 100

2 components

√ √ √

3 components

√ √ √

4 components

√ √ √

5 components

√ √ √

Blending Capability

6 components

√ √ √

Maximum blending rate in lbs./hr (kgs./hr) ℵ

750 (340) 3000 (1360) 5000 (2270)

ℵ Actual rates will vary. Consult the factory for guaranteed blending rates.

Model numbers are listed on the serial tag. Make sure you know the model and serial number

of your equipment before contacting the manufacturer for parts or service.

Blending systems are as varied as the applications they are designed for. All continuous loss-

in-weight blenders are sized to meet the specific requirements stated by the customer at the

time of purchase, and future changes my require a modification to the original system.

2-2 General Description

All blenders are designed to blend plastic pellets and regrind, and supply the blended material

to the extruder. The standard system is not designed to blend powder or any other no-free-

flowing materials. Consult the factory if your future process requirements require the

addition of these materials.

Accessories

The manufacturer offers a variety of options for these blending systems, including mezzanine

stands, agitated regrind supply and weigh hoppers, etc. All accessories are designed and

manufactured to ensure proper results for your application.

Customer Service

The intent of this manual is to familiarize the operator and maintenance personnel with these

blenders and help your organization get the maximum service from your equipment. If you

have any questions regarding installation, service, repair, custom equipment, or applications,

please do not hesitate to contact us for the information required. Prices for additional

equipment, accessories, or repair parts will be furnished promptly upon request.

Note: If you desire to use a blender for an application other than that for

which it was purchased, please contact your sales representative or our

factory to verify compatibility of the equipment with the new process.

Misapplication of the equipment could result in injury to the operator

or damage to the equipment.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 13

2-3 Typical Features & Components

Mechanical Features

• Blender automatically adjusts individual feeders to match learned extruder rate at the

ratio required.

• Upper material supply hoppers with conical re-fill valves and dust boots.

• Individual ingredient weigh hoppers with clear side walls.

• Cast aluminum feeder housings with drains.

• Lower mass flow weigh hopper assembly with clear side wall.

• Cascading mixing section.

• Precision

/10% span accurate cantilever load cell weighing system

• Yasakawa GPD 205 variable frequency drive (VFD) system with ¼ hp inverter-duty

(brushless) AC motors

• Motor drive panel – NEMA enclosure

• Machine-mount spool flange with drain

• Hopper lids arranged for manufacturer and non-manufacturer receivers and loaders

Controller Features

• Color Allen-Bradley PanelView 600 color touch screen

o Easy menu-driven format

o Serial printer port

o Recipe storage book

o Inventory and material usage information

o OPTIONAL Ethernet communications module

• Manual operation capabilities, for emergency use in case of processor failure

Electrical Features

• Inductive proximity switch for extruder speed (you may also write extruder speed

through Ethernet in lieu of using the proximity switch)

• 115/1/50 or 60 supply voltage

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 14

Blender System Component Description

This section describes the various components of the continuous blending system. The

continuous blending system is made up of the following components (See Figure 2 below):

• Ingredient supply/re-fill hoppers

• Ingredient weigh hoppers

• Ingredient metering auger assemblies

• Cascade material chute

• Lower mass flow weigh hopper

• Control panel

• Motor drive panel

• OPTIONAL “Quick color change” kit

Figure 2: Continuous Blender Assembly

Ingredient Supply/Re-fill Hoppers

The ingredient supply/re-fill hoppers are located on top of the blender frame. Their purpose is

to provide a supply of material to the individual ingredient weigh hoppers on demand. The

hoppers are equipped with an air-operated discharge valve that is opened by the PLC when a

respective weigh hopper needs a re-fill of material. These hoppers are sized to handle the

percentage requirements of the ingredients. Optional level sensors which might exist in these

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 15

hoppers are not controlled nor read by the blender. Their existence is solely for the use of a

low level alarm to be wired into a separate controller. These would not be present on a

standard blender.

The hoppers may be equipped with a polycarbonate sight glass. This is mounted in the upper

cone section of the hopper. This is useful for a quick reference of the material level in each

hopper.

The supply/re-fill hoppers should be vented to the atmosphere through the louver located on

the lid of each hopper. This louver is required to prevent the loading system from creating a

vacuum in the hopper, which would prevent material from flowing out properly. This

situation could be caused by a leaking discharge seal on the vacuum receiver.

Ingredient Weigh Hoppers

Each ingredient weigh hopper assembly consists of a conical mass flow weigh hopper, a

precision load cell and a discharge tube disc seal. A mass flow weigh hopper is a steep

degree conical hopper with vertical side walls with a discharge tube on the bottom. Each

weigh hopper is sized to the blender ingredient metering requirements. This assembly is

responsible for weighing the material ingredients as they are metered out by the metering

auger assemblies located below each weigh hopper. The manufacturer believes this is the

best way to weigh free flowing pelletized materials. This design allows the hopper to weigh

only the material and nothing else, unlike other systems that weigh the heavy auger

assemblies. This design eliminates extra variables, such as auger drive vibrations, etc. from

the weighing system and increases the load cell resolution. Each weigh hopper will be

refilled periodically as material reaches the preprogrammed low weight setpoint for that

hopper. Clear hopper side walls or sight glasses are provided on each on the weigh hoppers

to allow the operator to monitor the levels.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 16

Ingredient Metering/Transport Auger Assemblies

Each metering auger assembly consists of a:

• Cast aluminum motor mount

• Cast aluminum feeder body

• Aluminum feeder tube

• Gearbox

• Inverter-duty AC drive motor

• Machined metering auger

The metering auger assembly accurately meters the material from the ingredient weigh

hopper at the calculated rate.

The mass flow weigh hopper design allows more range of the load cell to be used for actually

weighing the material and eliminates dynamic drive movement and vibrations from affecting

the load cell readings.

Figure 3: Metering Auger Components

Cascade Material Chute

The cascade material chute is a rectangular conduit in which all the metering augers

discharge. The materials are cascaded together and directed vertically down into the lower

mass flow weigh hopper. A clean out door is provided on the chute above the augers, so that

any dust can be blown out if it has collected.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 17

Lower Mass Flow Weigh Hopper Assembly

The lower mass flow weigh hopper, otherwise known as the weighed common hopper, is

used to determine the actual processing rate of the processing machine so that the blender can

be slaved in to run at the learned rate. The hopper is constructed of spun aluminum and is of

the mass flow type (See the glossary in the Appendix). It is supported by a load cell, and will

carry a weight of material depending on how much is flowing into the hopper from the

metering augers, and how much is flowing out of the hopper, dictated by the processing rate

of the processing machine.

The computer uses the mass flow hopper flow rate (the differential rate), along with the

known total rate from the weight loss feeders to determine the actual processing rate of the

processing machine. The blender output rate is then adjusted to match the learned processing

rate. This method of operation provides very accurate slave in of the blender to the

processing rate, and eliminates the need for a mixing hopper.

The lower common weigh hopper is also equipped with a high level proximity level sensor to

allow manually adjusted volumetric operation of the blender in the event of computer failure.

Figure 4: Weigh Hopper Assembly

Note: The lower or common mass flow weigh hopper uses the change in weight over

time, of material contained in the hopper over time to calculate it’s discharge

rate (differential rate). This learned discharge rate is then summed with the

known total metering rates of the blender feeders to learn the actual processing

rate of the processing machine. The blender output rate is then adjusted to

match the learned processing rate, eliminating the need for a blender mixer.

“Fixed Rate” mode

The lower mass flow weigh hopper may be replaced by a collection hopper with “high” and “low “

level switches on higher capacity blenders. This configuration controls the blending system rate

based on material level

rather than material weight.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 18

PLC Control Panel

The PLC control panel may be mounted on the side of the blender frame, or remote mounted

near the blender. It uses an Allen-Bradley SLC 5/04 programmable controller with standard

24 vdc input output cards. This design provides excellent blender performance along with

easily replaceable off-the-shelf parts in case of any electronic component failure.

Touch Screen Interface

The PanelView 600 color touch screen display can be mounted up to 50 feet (15 m) from the

PLC control panel. It is very user friendly after installation and setup, simply enter in the

proper recipe and start the blender.

If it is desired to have a local display and control of the blender at the operator station, an

optional PanelView 600 can be installed.

Motor Drive Panel

The auger motor drive panel is mounted on the blender frame adjacent to the PLC control

panel in most applications. The motor drive panel is permanently wired on the blender. The

standard panel contains Yaskawa GPD 205 variable frequency motor drives, a power supply

and manual volumetric backup system wiring components.

The motor drives on the blender are standard, off the shelf drives and are readily available

from Yaskawa distributors and the manufacturer.

Power cords to each drive motor are equipped with plugs to facilitate auger removal and

motor replacement, if necessary.

Optional “Quick Color Change” Kit

The optional “QCC” quick color changeover kit allows the virgin material to be gravity fed

so the processing machine can be operated, while a color change is being done.

The virgin material auger metering assembly is equipped with a lower slide gate and

discharge tube. A flexible hose connects the discharge tube with a cast aluminum flange

below the blender that is equipped with an angled inlet tube stub. When the slide gate is

opened, virgin pellets will gravity feed to the bottom of the blender and bypass the blender

augers and the lower mass flow weigh hopper, allowing the extruder to be operated.

The blender augers can then be removed and the colors changed without the processing

machine having to be “re-strung”, and the product having to be re-gauged.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 19

2-4 Options

The following is a list of options, which your blender may have been equipped with:

• Mezzanine stand with slide gate and 4” tube stub.

• Low-level proximity switches. Detects material supply shortages for each

supply hopper before blender runs out (Requires a separate, remote mount alarm

panel with its own lights, horn and silence button).

• Supply hopper lids for non-ACS supplied vacuum receivers & loaders.

• Agitated, straight wall regrind supply & weigh hoppers for regrind material.

• Compressed air loader for low percentage additives.

• Ethernet communication module

•

Remote Display

Allows control of blender from a second location up to 50 feet (15 meters) away. The remote

display can be located in another location to allow the blender to be operated from that

position. The additional

remote PanelView 600 operates identically to the main display.

Continuous Loss-in-Weight Blenders Chapter 2: Functional Description 20

2-5 Safety Devices and Interlocks

This section includes information on safety devices and procedures that are inherent to the

continuous loss-in-weight blender. This manual is not intended to supersede or alter safety

standards established by the user of this equipment. Instead, the material contained in this

section is recommended to supplement these procedures in order to provide a safer working

environment.

At the completion of this section, the operator and maintenance personnel will be able to do

the following:

• Identify and locate specific safety devices.

• Understand the proper use of the safety devices provided.

• Describe the function of the safety device.

Safety Circuit Standards

Safety circuits used in industrial systems protect the operator and maintenance personnel

from dangerous energy. They also provide a means of locking out or isolating the energy for

servicing equipment.

Various agencies have contributed to the establishment of safety standards that apply to the

design and manufacture of automated equipment. The Occupational Safety and Health

Administration (OSHA) and the Joint Industrial council (JIC) are just a few of the

organizations that have joined with the plastics industry to develop safety standards.

Every effort has been made to incorporate these standards into the design of the continuous

loss-in-weight blender; however, it is the responsibility of the personnel operating and

maintaining the equipment to familiarize themselves with the safety procedures and the

proper use of any safety devices.

Fail Safe Operation

If a safety device or circuit should fail, the design must be such that the failure causes a

“Safe” condition. As an example, a safety switch must be a normally open switch. The switch

must be held closed with the device it is to protect. If the switch fails, it will go to the open

condition, tripping out the safety circuit.

At no time should the safety device fail and allow the operation to continue. For

example, if a safety switch is guarding a motor, and the safety switch fails, the motor should

not be run.

Page is loading ...

Sterling 060 User manual

Brand: Sterling

Model: 060

Category: Blenders

Type: User manual

This manual is also suitable for

Download PDF

report

Sterling 060 User manual

This manual is also suitable for

Sterling 060 User manual

Related papers

Other documents