Dings Magnetic Group Self-Cleaning Permanent Overhead Magnet User Manual

Installation and

Maintenance Manual

For

Dings Self-Cleaning

Permanent Overhead

Magnet

Table of Contents

General Information ............................................ ........ .... .... ........ .... ... ........ .... ........ .... .... .... 1

Installation Procedures

Unpacking and Handling ........................................................................................... 2

Magnet Storage ......................................................................................................... 3

Magnet Installation and Electrical Connections ........................................................ 4

Maintenance ....................................................... ........................................... .................... 5

Belt Tracking ............................................... ....................................................................... 6

Self Cleaning Belt Replacement Procedure ................................................. .... .... .... .... .... 7

Revised May 19, 2014

General Information

Magnet

Dings Model:
Dings Part Number:
Dings Serial Number:

Warnings:

The magnet must be positioned or guarded so that no contact can be made with moving
parts while the magnet is in operation.

CAUTION: STRONG MAGNET

Strong magnetic field may have an affect on pacemakers and other electrical devices.
Please contact the device manufacturer for further information.

Operating Temperature:

Ceramic magnets: -40°F through 250°F (-40°C through 120°C).
Rare earth magnets: 176°F (80°C) or less.

NOTE: Extreme temperatures may affect the performance of the magnet.
Refer to Bulletin 1214T.

1

Revised May 19, 2014

Installation Procedures

Unpacking and Handling

Upon receiving, check all packaged material for shortage of parts and possible damage.
Report shortages and damage to the carrier who delivered shipment. The magnet was
shipped fully assembled, ready for operation. If a material deflector was supplied, it was
shipped separately and must be bolted on before operation.

Magnet

This Dings self-cleaning permanent magnet was shipped using 4” x 6” wooden beams as
supports under the two sides of the magnet. This is done to protect the belt and the
magnet surface from damage during shipment. After unloading, the magnet should never
be placed directly on the ground. Rather, wood beams or some other means of support
should be placed beneath the two sides of the magnet box to raise the magnet and belt
above the ground.

The magnet should always be moved using the four lifting lugs provided. Never use a
forklift or other device to lift the magnet from the bottom.

The magnet should be stored indoors prior to installation.

2

Revised May 19, 2014

Recommended Storage of Overhead Magnets

1) On a self-cleaner, remove tension from drive belts and conveyor belts.

2) The following precautionary procedures are recommended:
a) Store magnet indoors in a low humidity, even temperature environment if possible.
b) Keep water and any other form of moisture away from the magnet while in storage.

3) This is a procedure for indoor storage only. Outdoor storage is definitely not advised and
will null and void our warranty on the magnet assembly.

4) Self-Cleaning Belt:
All belting should be stored in a cool, dry r oom, free from sunlight, steam pipes, oil,
water, moisture, and corrosive fumes.

5) Reducers:
PERIODICALLY INSPECT STORED OR INACTIVE DRIVES AND SPRAY OR ADD
RUST INHIBITOR EVERY SIX MONTHS, OR MORE OFTEN IF NECESSARY.
INDOOR DRY STORAGE IS RECOMMENDED.

6) Motor:
(One year or less.) Units should be stored indoors, in a clean, dry location. Winding
should be protected from excessive moisture absorption.

7) Bearings:
Rotate bearings every three months.

Revised May 19, 2014

3

INSTALLATION

A Self-Cleaning permanent overhead magnet is built in 2 types: Inline and Crossbelt. An
Inline type is installed over a conveyor head pulley so that the cleaning belt runs parallel to
the travel direction of material falling off the conveyor. The head pulley must be made from
non-magnetic material. A Crossbelt type is installed over a conveyor so that the cleaning
belt runs at a right angle to the travel direction of the material on the conveyor .

Magnetic performance may be affected by magnetic material in the field. This inclu des such
items as I-beams, metal supports, hoppers, or splitters. These and other ferrous objects
need to be kept out of the magnetic zone.

Crossbelt Inline
Suspension height is critical to the performance of the magnet. This distance is measured

from the bottom of the magnet face to the surface of the material handling belt.
The magnet should be mounted at the recommended suspension height. IF MAGNET IS

TOO HIGH ABOVE BURDEN, SUFFICIENT MAGNETISM MIGHT NOT REACH INTO THE
BURDEN. TOO MUCH HEIGHT WILL CAUSE A LOSS OF SEPARATION EFFICIENCY.
For best results, crossbelt separators should be centered over the belt and parallel to the
slope of the belt conveyor. Refer to page 6 for maximum conveyor incline.

Electrical Connections

Wiring should be in accordance with prevailing local and national electric codes. W ire siz e
should be based on the nameplate wattage.
Voltage of magnet terminals should be within + 5% of nameplate voltage.
After electrical connections have been completed, connect a-c power to the motor thru a
motor starter. Be sure line voltage and frequency agree with voltage and frequency shown
on motor nameplate. Check the cleaning belt for correct travel direction.

MOTOR STARTER AC SOURCE FOR PROPER

(BY OTHERS) BELT TRAVEL DIRECTION.

VOLTAGE ON MOTOR

NAMEPLATE

Revised May 19, 2014

CONNECT TO A 3 PHASE

4

MAINTENANCE

LUBRICATION SCHEDULE FOR OVERHEAD PERMANENT MAGNET

ITEM QUANTITY BRAND & GRADE INTERVAL

Magnet

Gearmotor

Magnet

Bearings

1.9 Quarts

As

Required

DRIVE ASSEMBLY

GEARMOTOR - Inspect motor at regular intervals. Keep motor clean and the ventilation
openings clear of dust or other debris. See attached Nord Gearmotor manuals for specific
information.

BEARINGS

LUBRICATION - If conditions are clean, lubricate every 2 to 6 months. If dirty, lubricate
every 2 weeks or on a schedule consistent with other equipment in the same environment.
Lubricate with a lithium based grease conforming to NLGI Grade 2.
GENERAL - Periodically check hex head set screws and bearing bolts for tightness, tighten
if loose.

Mobilgear SHC 630

Synthetic Oil or

Equivalent

Lithium Base NLG 1

Grade 2EP or

Equivalent

2,500 Hours

2-6 Months

SELF-CLEANING BELT

BELT - Periodically inspect for signs of wear. If belt replacement instructions are needed,
contact factory.
FASTENERS - Periodically check for wear, especially on the underside. If fastener
replacement instructions are needed, contact factory.
TRACKING - If belt needs to be retracked, refer to belt tracking section below.

ZERO SPEED SWITCH (Optional)
Periodic inspection of the shaft seal is recommended. Bearings are of the permanently
lubricated type.

PULLEY/SHAFT ASSEMBLIES

All crown curved pulley compression hubs are properly tightened to the manufacturers’
recommended torque at the factory. Shortly after initial start-up, the hub bolts should be
retightened to the following torques:
Shaft Diameter Torque
1 15/16” 180 in. lbs.
2 3/16” 180 in. lbs.
2 7/16” 180 in. lbs.
2 15/16” 360 in. lbs
Check every 2 to 6 months and retighten as needed.

5

Revised May 19, 2014

BELT TRACKING/TENSION

A

MAKE TUNE-UP ADJUSTMENTS
HERE, ¼ TURN AT A TIME

LOOKING AT THE TAKE-UP END OF THE MAGNET:

Belt track and tension should be checked at least every three hours for the first two days of
operation. Once every three days after that.

If the separator is to be installed on an angle (inclined crossbelt) we recommend that the
belt be tracked with the magnet level, then suspend it at its intended position. The
maximum recommended angle of tilt for a crossbelt separator is 20 degrees. If the belt is
running off towards the lower side, tighten the take-up on the high side or the side that the
belt is traveling away from.

If the belt is still proving difficult to track, check the following:
Are the bearings bolted down tightly to the frame?

Have any moved or shifted?
Is the magnet self-cleaning frame twisted or bent in any way?
Has the self-cleaning belt been stretched so that one side is longer than the other?
Have the ends of the belt been cut square to the edge of the belt prior to the splice

being installed?

Revised May 19, 2014

A x 0.02 = BELT SAG

BELT TRAVEL

WHEN ADJUSTING BELT, IT IS

VERY IMPORTANT TO MAINTAIN

THE PROPER AMOUNT OF SAG

BETWEEN THE BOTTOM OF THE

MAGNET AND THE BELT.

2 PULLEY DESIGN:

TO MOVE BELT LEFT,

TIGHTEN THE RIGHT TAKE-UP

TO MOVE BELT TO RIGHT,

TIGHTEN THE LEFT TAKE-UP

6

PROCEDURE TO REPLACE DINGS HINGED SPLICE BELTS ON

OVERHEAD MAGNETIC SEPARATORS

1. After the removal of the original or damaged belt, both take-ups should be taken in

as far as they can go.

2. The new replacement belt should d be laid out flat underneath the separator, cleats

facing down.

3. Draw both ends of the belt together so that the splice hinge pin can be installed.

4. Place the first retaining collar over one end of the hinge pin (leave approximately

3/8” gap between the collar and the splice end loop).

5. Loosely set all three screws evenly around the hinge pin so all knurled points are in

contact with the hinge pin. Then finish tightening all three screws securely.

6. Place the second retaining collar over the opposite end of the hinge pin (le av e

approximately 3/8” gap between the collar and the splice end loop).

7. Loosely set all three screws evenly around the hinge pin so all knurled points are in

contact with the hinge pin. Then finish tightening all three screws securely.

8. The final step is to properly track the new belt and adjust the take-ups as required in

order to keep the belt centered on the pulleys. The proper amount of belt sag must
be maintained in order for the belt to track properly. The proper amount of sag is
equal to 2% of the distance between the pulley centers. If the belt is too loose, you
may have a problem keeping the belt centered on the pulleys. If the belt is too tight,
it will put excessive strain on the splice.

7

Revised May 19, 2014