VMF Series Volumetric Screw Feeder€¦ · Bedminster Industrial Park 53 Apple Tree Lane P.O. Box 365 Plumsteadville, PA 18949 USA Toll Free: 1-800-257-5911 (USA and Canada) Phone:

REV2015.001

MODEL

VMF-15

AND

VMF-18

OPERATING

AND

MAINTENANCE

MANUAL

VMF Series Volumetric Screw Feeder

0

Model VMF-15 and VMF-18 Operating Manual REV2015.001

TABLE OF CONTENTS

LEGAL NOTES: NOTICES AND WARNINGS 1

INTRODUCTION: WELCOME TO SCALETRON 2

I. SECTION ONE: SAFETY OVERVIEW

A. ELECTRICAL HAZARDS 3

B. OPERATING HAZARDS 3

C. SAFETY 3

D. CONTACT INFORMATION 4

II. SECTION TWO: MODEL AND OPERATIONAL OVERVIEW

A. VMF SERIES OF VOLUMETRIC SCREW FEEDERS 5

B. MODEL VMF-15 AND VMF-18 BASIC OVERVIEW 5

C. STANDARD MODEL SPECIFICATIONS TABLE 6

D. AUGER SIZING AND FEED RATE INFORMATION 7

III. SECTION THREE: COMPONENTS DESCRIPTION

A. DRIVE UNIT 8

B. FEED SYSTEM 8

C. ELECTRONIC FEED CONTROL UNIT 8

D. OPTIONAL VIBRATION SYSTEM 8

E. ADDITIONAL ACCESSORIES AND COMPONENTS 9

IV. SECTION FOUR: SETUP PROCEDURES

A. UNPACKING THE FEEEDER 10

B. CHOOSING A LOCATION 11

C. MOUNTING THE FEEDER 11

D. MOUNTING THE SCR CONTROL BOX 12

E. MOUNTING THE HOPPER 12

F. CONNECTING THE POWER 12

G. INITIAL START UP OPERATIONS 13

H. ADJUSTING THE CURRENT SET POINTS 15

I. ADJUSTING THE VIBRATORY AGITATION CYCLE 15

0


TABLE OF CONTENTS

(CONT.)

V. SECTION FIVE: MAINTENANCE

A. RECOMMENDED PROCEDURES 16

B. IF MAINTENANCE IS REQUIRED 17

VI. SECTION SIX: APPENDIX

A. FIGURE 1: OVERALL DIMESIONS 20

B. FIGURE 2: MAJOR COMPONENTS 21

C. FIGURE 3: CUTAWAY VIEW 22

D. FIGURE 4: AUGER ASSEMBLY 23

E. FIGURE 5: VIBRATION MOUNT ASSEMBLY 24

VII. SECTION SEVEN: TROUBLE SHOOTING 25

VIII. SECTION EIGHT: FACTORY CALIBRATION SETTINGS 27

IX. SECTION NINE: PARTS LIST AND ORDER FORM 28

X. SECTION TEN: CUSTOMER NOTES 29

1


LEGAL NOTES: NOTICES AND WARNINGS

DISCLAIMER NOTICE:

All technical data, drawings, and written information provided in this

operational manual is proprietary information owned by Scaletron Industries

Ltd. The provided information is to be utilized only by the owner, operator,

or maintainer of equipment purchased from Scaletron Industries Ltd.

Disclosing, copying, and/or reproduction of any or all the material enclosed in

this operational manual for purposes not related to Scaletron Industries Ltd.

equipment is directly violating company interests and/or patents owned by

Scaletron Industries Ltd. and therefore strictly prohibited.

WARNING!!

Failure to follow recommended safety, operating and maintenance procedures

could result in personal injury and/or damage to property. Ensure all

operators, installation technicians and maintenance technicians have fully

read and thoroughly understand the information provided in this operational

and maintenance manual.

NOTE:

Scaletron Industries reserves the right to make or edit part numbers and part

designs as needed. In rare occasions, these changes may not be immediately

noted in documentation publications, such as, Operating and Maintenance

manuals. Because of the possibility of changes in documentation it is advised

to always include your product serial number when engaging in

correspondence with Scaletron Industries Ltd. This will allow Scaletron to

efficiently process your concerns or requests as quickly as possible

2


INTRODUCTION: WELCOME TO SCALETRON!

Congratulations on the purchase of your new VMF Series volumetric screw

feeder from Scaletron Industries, Ltd. For over 30 years the American based

company, Scaletron Industries has been designing and manufacturing equipment

that is required to operate in the harsh corrosive environments of the water

treatment industries. Since 1983 Scaletron has been meeting and exceeding the

operational specifications required by the water treatment industry by offering a

full line of top quality products. Whether municipal drinking facilities, waste

water facilities, or even industrial water and waste treatment, Scaletron’s

monitoring and measurement equipment has made them an industry leader when it

comes to corrosion resistance, product design and customer service.

Scaletron has expanded their line of already superior products with the

addition of their new VMF Series volumetric screw feeders and accessories. The

new VMF Series product line will allow Scaletron to offer the dry powder feeder

market the same high quality manufacturing, excellent technical knowledge and

efficient customer service as they do with their other products. This is just one

more way Scaletron Industries proudly strives to meet and exceed all their

customers’ requests and expectations.

We sincerely appreciate your business and hope you enjoy your new VMF Series

volumetric screw feeder.

3


I. SECTION ONE: SAFETY OVERVIEW

A. ELECTRICAL HAZARDS

The VMF-15 and VMF-18 are electrically driven and controlled volumetric feeders. There is

always a risk of electrical damage to equipment and/or personnel if proper and current electrical

guidelines and codes are not followed when installing and operating this equipment.

B. OPERATING HAZARDS

There are mechanically driven components on both the VMF-15 and VMF-18 that feed possibly

harmful chemicals automatically. To avoid potential personal injury the adherence to the

following guidelines is mandatory.

DO NOT operate volumetric feeder with lid removed or auger

assembly exposed!

DO NOT operate volumetric feeder with electrical enclosures open

or unsecured!

IMMEDIATELY deal with any spills or leakage of chemicals per the

applicable MSDS!

C. SAFETY

To ensure continued safe operating procedures follow the guidelines below:

Ensure the operator and or service technician has fully read and

understands the volumetric feeder Operating and Maintenance

Manual.

Follow established workplace safety precautions and procedures.

Understand proper handling and safety precautions of chemicals

being utilized by volumetric feeder.

Make sure all name plates, placards, labels , and tags are properly

attached and legible.

Use only factory approved replacement parts when servicing

volumetric feeder.

Always check with Scaletron Industries when attempting to operate

volumetric feeder outside of designed spectrum of specifications.

Establish and maintain a scheduled maintenance routine for the

volumetric feeder.

4


I. SECTION ONE: SAFETY OVERVIEW (CONTINUED)

D. CONTACT INFORMATION

IMPORTANT:

Do not discard this Operating and Maintenance Manual upon completion of

installation, information provided in this text is essential to proper and safe

operation and maintenance of the VMF series volumetric screw feeders.

Additional or replacement copies of this publication can be obtained by

contacting:

Scaletron Industries Ltd. Bedminster Industrial Park

53 Apple Tree Lane

P.O. Box 365

Plumsteadville, PA 18949 USA

Toll Free: 1-800-257-5911 (USA and Canada)

Phone: (+1) 215-766-2670

Fax: (+1) 215-766-2672

Email: [email protected]

5


II. SECTION TWO: MODEL AND OPERATIONAL OVERVIEW

A. VMF SERIES OF VOLUMETRIC SCREW FEEDERS

Scaletron’s VMF series includes two sizes of volumetric screw feeders one is the

VMF-15 which is the smallest volumetric feeder offered and the other is the VMF-18 which is

slightly larger than the VMF-15. Below is a brief list of what the VMF series offers.

304 Stainless steel built in gravity fed hopper.

Corrosion resistant powder coated steel frame.

Integrated vibration mounts.

Optional independently controlled vibratory agitator

304 Stainless steel concentric helical overwind auger.

304 Stainless steel, 0.75” to 2.5” diameter solid auger or 1.5” to 2.5” diameter

open helix. (Custom size augers are available upon request)

Water and dust proof variable speed control capable of remote operation..

90 VDC parallel shaft, wash down gear motor.

Optional integrated “Loss in Weight” measurement system.

Expandable accessories and configurations to meet customer’s specific needs.

B. MODEL VMF-15 AND VMF-18 BASIC OVERVIEW

The volumetric screw feeders VMF-15 and VMF-18 from Scaletron Industries Ltd. are automatic

metering screw feeders that dispense powdered, pelletized, or similar material into a secondary

process dictated by the customer. The basic operation of both the VMF-15 and VMF-18 is the

same. The following is a brief step by step description of how the volumetric feeder operates.

STEP 1) The material or chemical that is to be fed at a certain measured rate is first dispensed

into the hopper. The hopper relies on gravity and/or an optional agitation attachment

(see Figure 2) to move the material to the bottom of the hopper.

STEP 2) The material or chemical is dispensed via a horizontally rotating solid auger or open

helix (see Figure 3) which is connected to a parallel shaft gearmotor. The gearmotor’s speed is

electronically controlled by an integrated electronic speed control.

STEP 3) The rotation of the auger or open helix then moves the material along the base of the

hopper towards and into the feeder spout (see Figure 3).

STEP 4) The material then exits the volumetric feeder at the operators chosen rate and is

dispensed into the process or container as determined by the user.

6


II. SECTION TWO: MODEL AND OPERATIONAL OVERVIEW (CONT.)

C. STANDARD MODEL SPECIFICATION TABLE

OPTION MODEL VMF-15 MODEL VMF-18

BUILT IN HOPPER CAPACITY 1.5 Cubic Feet 1.8 Cubic Feet

HOPPER MATERIAL 12 and 16 Gauge 304 Stainless Steel

FEEDER SPOUT UHMW

BEARING ASSEMBLY UHMW

O-RING SEAL Viton

BASE AND FRAME MATERIAL Powder Coated Steel

OPEN HELIX AUGER DIAMETER SIZES .75” Minimum to 2.5” Maximum (Custom Sizing Available)

SOLID HELIX AUGER DIAMETER SIZES .75” Minimum to 2.5” Maximum (Custom Sizing Available)

OVERWIND HELIX DIAMETER 3.63” 5.5”

CONTROL BOX LEESON Speedmaster, Washguard, NEMA 4X SCR Motor

Control

MOTOR TYPE LEESON PE350 Series Parallel Shaft, TENV 90 VDC,

Washguard Gearmotor

MOTOR MODELS OFFERED:

HP/ RPM/ RATIO/ AMP

1/8 HP/ 14 RPM/ 180:1/ 1.5A

1/4 HP/ 42 RPM/ 58:1/ 2.6A

1/4 HP/ 83 RPM/ 29:1/ 2.6A

VIBRATORY AGITATOR

(OPTIONAL)

VIBCO Small Impact Line, Model SPRT-21:

Watertight

20lb Force

115VAC

3200 RPM

1.4A

45dB

Adjustable Speed Option

ACCURACY Approximate Range Within 2% of Volume

(To Determine Actual Accuracy Field Operation and Testing

is Required)

FEED RATE 0.2 to 35.4 Cubic Feet Per Hour

(Theoretical Maximum)

POWER REQUIRMENTS 115 VAC , 50-60 HZ, Single Phase

AMBIENT TEMPERATURE LIMIT 10°c -40°c

CONTROL INPUT mA 4-20 mA

CONTROL CONFIGURATIONS Manual, and Signal Start/Stop

OPTIONAL ACCESORIES Vibratory Agitator

“Lift Off” Lid

Hinged Lid

Custom Lid

Extension Hoppers

“Loss in Weight “ Measurement System

Wetting Cone

Base Stands

Adjusatble level feet

Single Bag Loader

Mixing Tanks

7


II. SECTION TWO: MODEL AND OPERATIONAL OVERVIEW (CONT.)

D. AUGER SIZING AND FEED RATE INFORMATION

The type and size of auger used by the volumetric feeder is directly dependent on the type of

material that is going to be fed through the screw feeder. An estimated figure can be determined

by utilizing an approximate material density for the material to be fed and then calculate the

outcome using specific formulas. Scaletron will provide assistance and detailed information on

topics relating to calculating auger sizes and feed rates before the purchase a VMF series

volumetric screw feeder. For further information contact a Scaletron sales representative.

However, even with the proper estimated feed rate calculation the feed rate can be affected by

other outside variables, such as differences in environmental conditions or uniformity of the

material being fed. Therefore, feed rate adjustment is covered in more detail later in this manual.

Prior to any permanent operations the operator must ensure that the screw type and feed rate is

correct, if these steps are overlooked or bypassed the screw feeder may not operate as

anticipated.

**To ensure reliability and longevity of equipment Scaletron recommends that the feeder speed be kept at

roughly 75% of maximum feed rate**

IMPORTANT:

The above approximate volumetric capacities have been calculated using

Scaletron’s standard auger dimensions and maximum rpm of each motor

configuration offered. It is VERY IMPORTANT that this information be

used for REFERENCE ONLY. Variables relating to the material being fed,

such as material density and physical characteristics, coupled with actual

feeding system components, such as the size and shape of the chemical

handling system, will affect the actual volumetric capacity and feed rate.

Approximate Maximum Volumetric Capacities (cu.ft./hr)

Screw Diameter MOTOR TYPE

14 RPM 42 RPM 83 RPM

0.75” 0.2 0.6 1.3

1.5” 1.7 5.2 10.2

2.5” 6.0 18.0 35.4

Approximate Volumetric Capacities (cu.ft./hr) @ 75% Motor Speed

Screw Diameter MOTOR TYPE

14 RPM 42 RPM 83 RPM

0.75” 0.2 0.5 1.0

1.5” 1.3 3.9 7.6

2.5” 4.5 13.4 26.5

8


III. SECTION THREE: COMPONENT DESCRIPTIONS

A. DRIVE UNIT

Scaletron’s VMF series screw feeders are driven by Leeson TENV 90VDC PE350 Series parallel

shaft washdown gearmotors. These gearmotors are designed for environments that would be

subject to frequent wash downs and are inherently water and dust proof. They are also low

maintenance and specifically made to be used with fullwave non-filtered SCR controls. The

gearmotor bypasses the necessity for any extra moving parts, such as, pulleys and/or belts. It also

provides simplified coupling to the drive shaft by allowing the utilization of a single high torque

coupling assembly (see Figure 3). The primary shaft is supported by a bearing assembly made of

UHMW (see Figure 4). The self lubricating material properties of UHMW allow the bearing

assembly to provide rigid support but also allow smooth turning of the auger assembly. Located

inside the bearing assembly is one o-ring. This o-ring provides a leak free seal around the drive

shaft so material in the hopper cannot exit through the bearing assembly.

B. FEED SYSTEM

The auger assembly is similar for both the VMF-15 and VMF-18. The diameter of the overwind

auger is the only difference between the two models. There are two basic components of the

auger assembly. The first component is the primary auger helical screw, which can be a solid

auger or an open helix type that provides the movement of the material to be dispensed. The

second component is the overwind auger, which ensures the smooth delivery of materials to the

primary auger. During assembly of the feed system the overwind auger is located over the

threads of the primary auger, using the dowel hole to ensure correct locating. Then the primary

auger is attached to the drive shaft by method of left hand threads making sure that the over wind

auger base plate is correctly seated allowing the helical screw to be thoroughly tightened into

operating position. Once fully assembled the primary auger is surrounded by the concentric

overwind auger, allowing both helical screws to be turned at the same time via the same drive

shaft.

C. ELECTRONIC FEED CONTROL UNIT

Scaletron Industries Ltd. uses a Leeson Speedmaster® Washguard® Model 174102 NEMA 4X

SCR motor controller in the VMF series of volumetric feeders. For a detailed description, please

refer to the Leeson Speedmaster® Washguard® Operating Manual that is supplied with the

purchase of a volumetric screw feeder from Scaletron Industries Ltd.

D. OPTIONAL VIBRATION SYSTEM

The VMF-15 and VMF-18 both have the option of adding a VIBCO Model SPWT-21 electric

vibratory agitator to the exterior of the hopper. Scaletron uses the VIBCO Model SPWT-21

because it is watertight, has an adjustable speed option, and delivers 20 lbs in force. With the

addition of a vibratory agitator to the gravity fed hopper certain materials that normally are

difficult to feed can be more easily moved to the primary auger ensuring positive feed control.

9


III. SECTION THREE: COMPONENT DESCRIPTIONS (CONTINUED)

E. ADDITIONAL ACCESSORIES AND COMPONENTS

Scaletron Industries Ltd. offers many accessories for the VMF series volumetric feeders. These

accessories allow the customer to design a more specific feeder system to meet their needs.

Accessories include integrated “Loss in Weight” measurement system, lids, hopper extensions,

single bag loader, base stands, adjustable level feet, mixing tanks, and a wetting cone. All of the

accessories offered by Scaletron Industries are described in more detail in the VMF Series

Accessories Manual. If more information is needed please contact your local Scaletron Industries

sales representative.

1. “Loss in Weight” Measurement System: Since Scaletron Industries Ltd. specializes in

chemical scale design they thought it convenient to offer a fully integrated measuring system

on the VMF series volumetric screw feeders. The system utilizes four frame mounted load

cells directly connected to Scaletron’s 1099 indicator. The indicator box can be mounted in

its normal position which is attached to the motor cover box on the screw feeder or it can be

wall mounted in a remote location with an additional length of indicator wire.

2. Lids: The basic volumetric screw feeder from Scaletron Industries Ltd. is NOT supplied

with a lid for the top of the hopper. Scaletron Industries offers three lid configurations. The

first type of lid is a simple, “lift off” type lid which has a handle for griping at its center and

simply lifts vertically from the hopper. The second is a hinged lid that is securable by a

lockable latch. Lastly, is the third lid which is secured via fasteners. This particular cap can

then be customized to accept the cut out or bolt pattern of existing or anticipated feed system

tubing. This accessory is primarily used when extra hopper capacity is required and the load

of that extra capacity exceeds the load limits of the volumetric feeder’s frame.

3. Hopper Extensions: Hopper extensions are offered that range from 2.4 to 13.6 additional

cubic feet. These extensions are specifically designed to mount directly to the VMF series

volumetric feeder. As a precaution relating to designed load capacity and stability

considerations, Scaletron industries only recommends the use of their external hopper

configurations. For more information please contact your Scaletron equipment sales

representative.

4. Single Bag Loader: The single bag feeder allows the operator to safely load standard 50lb

feed material bags into the hopper quickly and efficiently. This loader also can be fitted with

a dust removal fan to keep work areas clean and free of airborne dust produced by unloading

feeding material bags. For more information please contact your Scaletron equipment sales

representative.

10


III. SECTION THREE: COMPONENT DESCRIPTIONS (CONT.)

5. Base Stands: Although stands are not supplied with the basic volumetric screw feeder

package, Scaletron Industries does and will fabricate custom stands to meet the customer’s

requirements. For more information please contact your Scaletron equipment sales

representative.

6. Adjustable Level Feet: If a need for leveling the volumetric feeder is foreseen Scaletron

offers adjustable level feet. There are two types of leveling feet offered. One is a standard

stainless steel foot with rubber pad that has the ability to raise and lower the height of the

feeder. The second foot is a stainless steel bolt down swivel foot which allows for an

adjustable height permanent mounting position. This type of foot is suited for situations

where mounting surfaces are not level but the feeder must be securely bolted down.

Adjustable level feet are already included with the “Loss of Weight” measurement system

option.

7. Mixing Tank: Mixing tanks in various capacities, as well as, custom designed

configurations are available from Scaletron Industries. These tanks are designed to be

capable of accepting the VMF series volumetric feeders in a direct mounting location atop of

the tanks. This location allows the customer to free up spatial resources by subtracting the

need for a base stand or other mounting configurations. For more information please contact

your Scaletron equipment sales representative.

8. Wetting Cone: Scaletron manufactures a wetting cone that is specially designed to be

compatible with the VMF series of volumetric feeders. Scaletron’s wetting cone allows the

customer to ensure proper water to material mixture, while providing a dust free work

environment. For more information please contact your Scaletron equipment sales

representative.

IV. SECTION FOUR: INSTALLATION AND SET UP

A. UNPACKING THE FEEDER

After the volumetric screw feeder is unpacked, check all items against packing list to confirm that

all parts described or required are present. This ensures that all parts have been received from

Scaletron’s manufacturing facility and also confirms that no parts were accidently discarded

during the unpacking process.

Note:

If possible, all equipment should be unpacked at the location where the

assembly and installation is to be conducted.

11


IV. SECTION FOUR: INSTALLATION AND SETUP (CONT.)

B. CHOOSING A LOCATION

The location for the volumetric feeder is completely decided upon by the owner of the equipment.

However, Scaletron would like to make it clear that installing the volumetric feeder in locations

that are primarily damp or subject to fluctuating environmental conditions may have an adverse

effect on the material density and flow rate of the material to be fed. Also, locations that are

subject to strong air currents should be avoided, so that dry powdered chemicals will not become

airborne creating dust that may cause property damage and/or personal injury.

C. MOUNTING THE FEEDER

The VMF series is designed to be mounted in various configurations and it is the decision of the

equipment owner to decide on mounting locations. However, Scaletron does recommend the

following when considering mounting location priorities:

When possible use the correct stand accessories and/or mixing tank provided by

Scaletron Industries, this will ensure that the volumetric feeder is properly secured

per the factory requirements.

If no standard Scaletron support equipment is purchased, then ensure the structure

that is to support the volumetric feeder is level and has a mounting surface that is

equal to or larger than dimensions “I” and “J”. These dimension represent the

distance between the 0.75” diameter mounting holes located in the base assembly of

the feeder.(see Figure 1 )

Always make sure all fasteners used to permanently locate the volumetric feeder and

any connecting components are correctly installed and completely tightened and

secured.

WARNING!!

Failure to correctly secure all fasteners used in installation of volumetric

feeder may result in personal injury and/or property damage.

NOTE:

Scaletron Industries recommends that there should be 36” of clearance

around the perimeter of the volumetric feeder after proper installation in its

permanent location. Maintaining adequate clearance room will allow much

easier maintenance inspections and servicing in the future.

12



D. MOUNTING THE SCR CONTROL BOX

Scaletron VMF series volumetric feeders come standard with their SCR control boxes and

optional scale indicator boxes mounted directly to the motor mount box (see Figure 2) At the

request of the customer, Scaletron will furnish the required extra components and accessories if

the control box and/or optional scale indicator boxes must me mounted in a remote location

separate from the feeder itself. Contact a Scaletron sales representative for more information.

E. MOUNTING THE HOPPER

Many times the built in standard hopper on a volumetric feeder simply does not provide enough

volume for the demand of material to be dispensed. For this reason Scaletron provides optional

hopper extensions. These extensions are the only accessories recommended for use on the VMF

series volumetric feeders. Please refer to the “Additional Accessories and Components” section

of this manual located on page 10. If the customer knows the volumetric feeder is or will be

installed in a location where the built in hopper will be fed from a separately supported primary

hopper, then Scaletron also provides a customizable hopper connection lid accessory which can

utilize a flexible mount connection for the transfer of the material from the primary hopper to the

built in hopper on the VMF series volumetric feeder.

WARNING!!

Scaletron strongly advises against the utilization of any other directly

mounted primary hopper extensions. The use of which may cause premature

equipment failure and/or damage to property and personnel.

WARNING!!

Serious injury or death may occur if proper and current electrical codes and

procedures are not strictly adhered to during the installation, operation, and

maintenance of this volumetric screw feeder.

F. CONNECTING THE POWER

Power and other electrical connections to the feeder are customizable to meet the owner’s specific

needs. However, the correct procedures must be followed for safe and efficient operation.

Scaletron insists that the customer refers to the electrical diagrams and procedure instructions in

the digital copies of the Leeson and Vibco operating manuals provided in conjunction with this

manual upon the purchase of a VMF series volumetric feeder from Scaletron Industires.

13


IV. SECTION FOUR: INSATLLATION AND SETUP (CONT.)

G. INITIAL STARTING OPERATIONS

The standard VMF feeder from Scaletron Industries will arrive pre-calibrated and have the auger

assembly correctly assembled. However, in order to ensure safe operating practices refer to the

“Safe Start Test Run” checklist below.

“Safe Start Test Run”

Ensure power is off!

Make sure all electrical connections and electrical

enclosures are safely secured by correct methods

Ensure all vibration mount assemblies are tight and

secure

Make sure the primary auger and overwind auger are

tight and secured properly to drive shaft

Clear any debris or foreign materials from the hopper

and feeder spout

Turn power on

After the “Safe Start Test Run” checklist has been confirmed, follow the procedures below.

NOTE:

The instructions on the following page are taken from page 18 of the

Leeson Speedmaster® Washguard® Operational Manual for the Leeson

Model 174102 SCR Motor Control Unit. Please refer to Leeson’s

manual for advanced procedures and troubleshooting relating to the

Leeson Model 174102 SCR Motor Control Unit. A digital copy of this

manual is provided with each VMF Series volumetric feeder upon

purchasing from Scaletron Industries Ltd.

14



15



H. ADJUSTING THE CURRENT SET POINTS

In an effort to speed up the installation and operation of the volumetric feeder, Scaletron ships each VMF

series volumetric feeder from the factory pre-calibrated. The customer’s desired specifications are taken

into consideration and then calculated with standard theoretical loads, environment, and dimensions. The

resulting calibration is as close to the customer’s desired specifications as possible and may need no extra

calibrating. However, volumetric feeders rely on other variables that can only be ascertained by real

world “on site” experimentation. It is highly recommended that verification of the pre-calibration be

made in the field at the installation site to establish the correct operating and calibration settings. Please

refer the “Calibrating” starting section on page 10 of the Leeson Speedmaster® Washguard®

Operational Manual for the Leeson Model 174102 SCR Motor Control Unit. (A provided in electronic

copy is furnished with the purchase of a VMF Series volumetric feeder from Scaletron Industries)

IMPORTANT:

Scaletron strongly insists that “on site” test readings be performed to

correctly verify the calibration of the VMF series volumetric feeder. DO NOT

solely rely on factory calibration settings, variables such as material

characteristics, environment, and hopper feeding equipment WILL BE

different at the installation site.

I. ADJUSTING THE VIBRATORY AGITATION CYCLE

The optional vibratory agitator is directly mounted to the built in hopper on the VMF series feeder. Like

SCR controls, the settings for the vibratory agitator are set to a factory standard obtained by calculating

data supplied by customer’s requirements and optimal theoretical operating conditions. The standard

vibratory agitator is offered in a simple “on/off “ configuration and will need expandable circuitry if

feeding applications dictate a more complex vibrating cycle. Because, finding the correct vibration

setting in “real world” operating conditions can be difficult and most likely will be determined by trial

and error experimentation. To shorten the process and length of agitation experiments, Scaletron does

offer adjustable variable controls which allows vibration cycles to be set and executed automatically. For

more information contact your Scaleton Industries sales representative.

NOTE:

Running the optional Vibco agitator constantly will have negative affects

regarding, material federates and equipment longevity. It is highly

recommended by Scaletron that the use of an automated vibratory agitation

cycle be adopted.

V. SECTION FIVE: MAINTENANCE

16


A. RECOMMENDED PROCEDURES

The VMF-15 and VMF-18 have been designed to be as maintenance free as possible. However,

to ensure operational longevity a scheduled maintenance cycle is recommended and should be

conducted periodically. Below are certain aspects and areas that are recommended to be

incorporated into a maintenance checklist.

WHILE POWER IS ON

Visually inspect surrounding area for leaks or spills.

Listen for abnormally loud sounds, such as clinks, clacks, squeaks, or grinding, that otherwise should

not be present.

Visually inspect base and exterior for deterioration of components due to rust or chemical corrosion.

Visually inspect vibration mounts for cracking.

Visually inspect for loose fasteners.

Ensure operating environment is kept tidy and clean.

WHILE POWER IS OFF!!

Visually inspect interior of hopper for dents, deep gauges, thin walls, abnormal wear, weak joints and

cracks in welds.

Inspect overwind auger for extreme disfigurement, bends, or cracks.

Inspect primary auger for extreme disfigurement, bends, or cracks.

Try to push and pull auger horizontally to check for excessive play in bearing components.

Remove coupling safety shield and inspect coupling for wear, cracking, and loose or missing set

screws.

Visually inspect bearing assembly for signs of chemical leakage.

Ensure bearing assembly is tightened completely.

Visually inspect all externally exposed wires for tears, cuts, breaks, or missing protective coating.

If a vibratory agitator is installed visually inspect mounting hardware and welds for cracks and loose

fasteners.

Visually inspect vibration mounts for cracks and wear, then ensure that they are tightened completely.

Grab hopper and attempt to shake back and forth in a sideways motion perpendicular to the primary

auger and check for excessive movement and/or contacting metal sounds from vibration mounts.

Ensure feed spout is completely tightened and inspect for excessive wear, chips, gauges, or cracks

Make sure a periodic cleaning of all major components is carried out at a reasonable scheduled cycle

relative to the amount of use the volumetric screw feeder is exposed to.

V. SECTION FIVE: MAINTENANCE (CONT.)

17


B. IF MAINTENANCE IS REQUIRED

WARNING!!

TO AVOID PERSONAL INJURY, ENSURE POWER TO SCREW FEEDER IS OFF

AND MOTOR IS LOCKED OUT CORRECTLY PRIOR TO PERFORMING ANY

MAINTENANCE PROCEDURES!

The following chart describes with detailed instructions common maintenance procedures:

MAJOR

COMPONENT

AND

SUB PARTS

PROCEDURES FOR CORRECTION TOOLS AND/OR

PARTS REQUIRED

Auger Assembly

- Overwind

Auger

- Primary Auger

- 2 Dowel Pins

Disassembly

1. Remove all components that inhibit access to inside of

built in hopper.

2. Remove all components that inhibit the removal of the

primary auger screw, such as a, wetting cone.

3. Place 5/8” wrench or spanner wrench tool on Drive

Shaft near the High Torque Coupling Assembly on the

side closest to the hopper. This will prevent shaft

rotation.

4. Place a 1-1/4” wrench on the flat spots of the Primary

Auger base.

5. Turn Primary Auger side 1-1/4” wrench CW while

holding Drive Shaft stationary. Threads are left handed

and should break free with minimal effort.

6. Unthread Primary Auger screw completely. Overwind

Auger should follow with Primary Auger.

7. Remove Overwind Auger by sliding Primary Auger

towards Feed Spout while holding Overwind Auger

stationary. Slide Primary Auger completely out of Feed

Spout and lift Overwind Auger up and out of hopper.

**Follow the same steps in reverse for assembly**

(1) 5/8” open end wrench or

spanner wrench tool

(1) 1-1/4” open end wrench

If replacement is required use:

-Auger Assembly:

SI-2015-VF-S-013

-Overwind Auger:

SI-2015-VF-S-002

(VMF-15)

SI-2015-VF-S-003

(VMF-18)

-Dowel Pin:

SI-COMN-HW-P-001

-Primary Auger:**

**The correct part number for

the Primary Auger will be

relative to the original

purchase order, refer to that

documentation for replacement

part number.**

Feeder Spout Disassembly

1. Remove all components that inhibit the removal of the

Feeder Spout, such as a, wetting cone or other

attachments which may prevent having proper clearance

to fully unscrew the Feeder Spout.

2. Grip outside of Feeder Spout firmly with channel locks

or large pipe wrench.

3. Turn Feeder Spout CCW and unthread till completely

clear of hopper threads.


Pair of channel locks or large

pipe wrench


-Feeder Spout:

SI-2015-VF-P-028**


the Feeder Spout will be

relative to the original

purchase order, refer to that

documentation for replacement

part number.**

18


Motor

- High Torque

Coupling

Assembly

- Shaft to

Coupling Insert

- Coupling

Sleeve

- Motor Mount

Box

Removal

1. Remove Motor Mount Box (see Figure 2) loosening

four mounting bolts.

2. Remove any wiring to motor that would interfere with

motor removal. (Be sure to label removed wires to

allow for easier reassembly)

3. Remove Shaft Coupling Safety Shield (see Figure 2) by

loosening two bolts or strain reliefs(if equipped with

optional load cells)

4. Loosen the motor mount nuts underneath the frame to

allow the motor to slide in its adjustment track slots.

5. Slide the Coupling Sleeve towards the hopper till the

Shaft to Coupling Insert on the motor side is visibly

disengaged.

6. Then slide motor away from hopper until motor mount

nuts become free from frame in motor adjustment track

slots.

7. Lift motor vertically from frame.

**Follow the same steps in reverse for assembly and but

ensure shaft alignment is correct**

(1) open end wrench or socket


-Motor:

SI-2015-VF-B-001**

-High Torque Coupling

Assembly:

SI-2015-VF-B-014

-Shaft to Coupling Insert:

SI-2015-VF-B-002

-Coupling Sleeve:

SI-2015-VF-B-003

-Motor Mount Box:

SI-2015-VF-P-003

-Shaft Coupling Safety Shield:

SI-2015-VF-P-006


the Motor will be relative to the

original purchase order, refer

to that documentation for

replacement part number.**

Bearing Assembly

- Outside Shaft

Bearing Insert

- Inside Shaft

Bearing Insert

- Drive Shaft

- O-ring Seal

Removal

1. Follow all steps in removal of Motor removal section.

2. Follow all steps in Auger Assembly removal section.

3. After Motor is fully removed insert spanner wrench

tool into the hole pattern on face of the Outside Shaft

Bearing Insert.

4. Loosen the Outside Shaft Bearing Insert by turning

spanner wrench tool in a CCW direction.

5. Once loosed fully remove Outside Shaft Bearing Insert

by completely unthreading it from the hopper.

6. Remove Drive Shaft completely from bearing assembly

by firmly griping and pulling toward motor mount.

The Drive Shaft should slide out of the Inside Shaft

Bearing Insert easily.

7. Once the Drive Shaft has been removed the main O-

ring Seal can be inspected for wear or damage and

replaced if needed.

8. To remove Inside Shaft Bearing Insert fit spanner

wrench tool into hole pattern on face of Inside Shaft

Bearing Insert

9. Loosen the Inside Shaft Bearing Insert by turning

spanner wrench tool in a CCW direction.

10. Once loosened fully remove the Inside Shaft Bearing

Insert by completely unthreading it from the hopper.

**Follow the same steps in reverse for assembly and but

ensure shaft alignment is correct**

(1) Spanner wrench tool

(1) 1-1/4” open end wrench


-Bearing Assembly:

SI-2015-VF-S-009

-Outside Shaft Bearing Insert:

SI-2015-VF-P-024

-Inside Shaft Bearing Insert:

SI-2015-VF-P-023

-Drive Shaft:

SI-2015-VF-P-025

-O-ring Seal:

SI-COMN-HW-O-001

19


NOTE:

Scaletron Industries reserves the right to make or edit part numbers and part

designs as needed. To ensure correct part number always include your

product serial number when engaging in correspondence with Scaletron

Industries Ltd.

Vibration Mount

Assembly

- Outer Vibration

Insert

- Inner Vibration

Insert

- Stainless Steel

Bolt

- Stainless Steel

Nut

- Stainless Steel

Split Washer

- Stainless Steel

Flat Washer

Removal

1. Place ¾ wrench or socket on the head of the Stainless

Steel Bolt and the corresponding Stainless Steel Nut on

the other side of the assembly.

2. Loosen the Vibration Mount Assembly nuts by turning

holding the Stainless Steel Bolt stationary and turning

the Stainless Steel Nut CCW

3. Unthread the Stainless Steel Nut completely from the

Vibration Mount Assembly.

4. Slide the Stainless Steel Bolt out from the Inner

Vibration Insert and completely remove from assembly

5. At this point the Stainless Steel Flat Washer and Split

Washer are free to be removed as well.( Make sure not

to misplace washers)

6. Remove Inner and Outer Vibration Inserts by prying

each in the direction away from the hopper base frame.


(2) 3/4 wrench or socket

Small prying tool

If replacement is required

use:

-Vibration Mount Assembly:

SI-2015-VF-S-001

-Outer Vibration Insert:

SI-2015-VF-P-016

-Inner Vibration Insert:

SI-2015-VF-P-004

-Stainless Steel Bolt:

SI-COMN-HW-B-001

-Stainless Steel Nut:

SI-COMN-HW-N-001

-Stainless Steel Split Washer:

SI-COMN-HW-W-001

-Stainless Steel Flat Washer:

SI-COMN-HW-W-002

20


VI. SECTION SIX: APENDDIX

A. FIGURE 1: OVERALL DIMENSIONS

21


VI. SECTION SIX: APENDDIX (CONT.)

B. FIGURE 2: MAJOR COMPONENTS

22



C. FIGURE 3: CUT AWAY VIEW

23



D. FIGURE 4: AUGER ASSEMBLY

24



E. FIGURE 5: VIBRATION MOUNT ASSEMBLY

25


VII. SECTION SEVEN: TROUBLE SHOOTING

The following chart is provided to help with common operational errors

Feeder has no output

(motor is running but

feed screw is not turning)

Coupling set screws have

come loose or fallen out

Retighten or replace set

screws in drive coupling

Feed screw is jammed with

foreign material or large

masses of feed material

Remove feeder spout and try

to clear screw or empty

feeder and remove primary

auger assembly

Current limit is set to low Reset current limit to correct

adjustment position

Slow feed or No Feeder

Output

Motor is running in wrong

direction

Reverse motor direction.

Switch power leads

connected to motor terminals

Feed screw direction is

wrong

Review volumetric feeder

order documentation then

consult with Scaletron sales

representative

Speed of feed screw rotation

has changed

Adjust and correct speed

setting

Hopper has become empty

Fill hopper with feed

material

Material is forming a“cave”

or “hollow area” around

feeder screw

Consider need for feeder

agitation and hopper

vibration

Foreign material or lumps

are found in output material

Remove spout and try to

clear screw or empty feeder

and remove trough and feed

screw assembly

26


VII. SECTION SEVEN: TROUBLE SHOOTING (CONT.)

Feeder has no material

output (motor does not

run)

Feeder has no power Check for possible power

connection issues and re-

connect power

Function switch on control

box is in wrong position

Change switch to correct

position

Signals from remote location

are interrupted

Check to see if feeder

operates manually. Correct

remote signal interrupts

Fuse has blown Consult operating manuals

and replace fuse if necessary

SCR controller is broken or

malfunctioning

Review volumetric feeder

documentation and contact

Scaletron sales representative

Motor brushes have become

worn or misaligned

Consult motor operational

maintenance manual

**NOTE: If feeder spout is removed while the feeder is full, contents of hopper may

spill out quickly. Ensure proper measures are taken to avoid hazardous and/or unwanted

chemical spills.**

27


VIII. SECTION EIGHT: FACTORY CALIBRATION SETTINGS

P.O. Box 365, 53 Apple Tree Lane, Plumsteadville, PA 18949 Phone: (215)766-2670 Fax (215)766-2672

Website: www.scaletronscales.com email: [email protected]

CALIBRATION CERTIFICATE

THIS IS TO CERTIFY THAT THE EQUIPMENT DESCRIBED BELOW WAS CALIBRATED USING

FACTORY PREFERED MATERIAL DENSITY AND FEED RATE THEORETICAL TEST

CALCULATIONS IN A CONTROLED ENVIRONMENT.

IMPORTANT!!! ACTUAL MATERIAL DENSITY AND FEED RATES MAY DIFFER, PLEASE

REFER TO SECTION FOUR OF THE OPERATIONAL AND MAINTENCE MANUAL FOR

MORE INFORMATION.

MODEL: VMF-15 ( ) / VMF-18 ( ) Volumetric screw feeder

SERIAL NO: ____________________

POWER: 115 VAC ( ) / Other: ________

PRIMARY AUGER: Solid Helix ( ) / Open Helix ( )

PRIMARY AUGER DIAMETER: 0.75” ( ) / 1.5” ( ) / 2.5” ( ) / Other: ________

OVERWIND AUGER DIAMETER: 3.63” ( ) / 5.5” ( ) / None ( )

MATERIAL BEING FED: ____________________

ESTIMATED MATERIAL DENSITY: ____________________

ESTIMATED FEED RATE: ___________________

ESTIMATED ACCURACY: ___________________

NOTES: ____________________________________________________________________________

CALIBRATION TECHNICIAN: Name / Signature / Date

http://www.scaletronscales.com/

mailto:[email protected]

28


IX. SECTION NINE: PARTS LIST AND ORDER FORM

NOTE:

Scaletron Industries reserves the right to make or edit part numbers and part designs as needed.

To ensure correct part number always include your product serial number when engaging in

correspondence with Scaletron Industries Ltd.

MODEL: VMF-15 ( ) / VMF-18 ( ) Volumetric screw feeder

SERIAL NO: ____________________

CUSTOMER NAME: __________________________________________________________________________

POINT OF CONTACT: ________________________________________________________________________

METHOD OF CONTACT (PHONE / FAX / EMAIL): _______________________________________________

PUCHASE ORDER #: ______________________ DATE: ____________________

SIGNATURE: _____________________________

PART

NUMBER

FIGURE

SHOWN

DESCRIPTION OF

PART

SUPPLIED

QTY.

ORDER

QTY.

SI-2015-VF-S-007 Figure 2 304 Stainless steel hopper

for VMF-18 (1.8 cu. ft capacity) 1

SI-2015-VF-S-010 *Not Shown in

manual

304 stainless steel hopper

for VMF-15 (1.5 cu. ft capacity) 1

SI-2015-VF-S-005 Figure 2 Powder coated steel frame 1

SI-2015-VF-P-003 Figure 2 Motor control box 1

SI-2015-VF-P-006 Figure 2 Shaft coupling safety cover 1

SI-2015-VF-B-006 Figure 2 SCR Control box 1

SI-2015-VF-S-001 Figure 2 & 5 Vibration mount assembly 4

SI-2015-VF-P-004 Figure 5 Inner vibration insert 4

SI-2015-VF-P-016 Figure 5 Outer vibration insert 4

SI-COMN-HW-B-001 Figure 5 Stainless steel bolt 4

SI-COMN-HW-N-001 Figure 5 Stainless steel nut 4

SI-COMN-HW-W-001 Figure5 Stainless steel split washer 4

SI-COMN-HW-W-002 Figure 5 Stainless steel flat washer 4

SI-2015-VF-S-013 Figure 2 Auger assembly 1

SI-2015-VF-S-002 Figure 3 & 4 VMF-15 Overwind auger 1

SI-2015-VF-S-003 Figure 3 & 4 VMF-18 Overwind auger 1

SI-COMN-HW-P-001 Figure 4 0.25” Dowel pins 2

SI-2015-VF-B-014 Figure 3 High torque coupling assembly 1

SI-2015-VF-B-003 Figure 3 & 4 Coupling sleeve 1

SI-2015-VF-B-002 Figure 4 Shaft to coupling insert 2

SI-2015-VF-S-009 Figure 3 Bearing assembly 1

SI-2015-VF-P-023 Figure 4 Inside shaft bearing insert 1

SI-2015-VF-P-024 Figure 4 Outside shaft bearing insert 1

SI-2015-VF-P-025 Figure 4 Drive shaft 1

SI-COMN-HW-O-001 Figure 4 O-ring seal 1

SPECIFIC AND OPTIONAL ACCESSORIES FOR SERIAL NUMBER: ________________________

PART

NUMBER

FIGURE

SHOWN

DESCRIPTION OF

PART

SUPPLIED

QTY.

ORDER

QTY. SI-2015-VF-B-005 Figure 2 Vibratory agitator 1

SI-COMN-XX-P-015 Figure 2 Load cell 4

SI-COMN-XX-C-004 Figure 2 Adjustable level foot 4

SI-COMN-XX-C-00 *Not shown in

manual

Adjustable level bolt down swivel foot 4

29


X. SECTION TEN: CUSTOMER NOTES

30


Documents

VMF Series Volumetric Screw Feeder€¦ · Bedminster Industrial Park 53 Apple Tree Lane P.O. Box 365 Plumsteadville, PA 18949 USA Toll Free: 1-800-257-5911 (USA and Canada) Phone: