EB Series Service Manual
Contents
1. cross arm cracked or Check power supply Remove restriction Tighten bowl attachments Clean or replace See separate instructions for proper torque Repair or replace as required Refer to tuning instructions in this manual Feeder operating below capacity amplitude correct but feed rate low Bowl overloaded Bowl worn out Improper air pressure at manifold supplied if A single layer of parts should be sufficient Repair or replace as required Unless otherwise noted air pressure at manifold should be 50 p s i Special orientation features if Adjust as required supplied improperly adjusted Feeder hums will not vibrate Defective SCR or rectifier See controller instructions for testing Feeder fails to operate no Coil failure Replace response Blown fuse Replace Faulty switchgear Short in electrical wiring Replace or repair Repair Replace only with parts supplied or recommended by Homer City Automation AIR GAP ADJUSTMENTS The air gap of a vibrating feeder is the spacing between the armature face and the face of the core assembly See Figure 1 page 2 Proper adjustment is critical for optimum feeder performance If the air gap is too close the armature and core will make contact during feeder operation A striking condition will cause severe mechanical damage broken springs cracked bowl or base cracked armature or core If the air gap is adjus2. dry location free from excessive vibration If possible install the controller at a location where it will receive adequate ventilation This will ensure prolonged component life NOTE The power supply voltage and frequency must equal what is stamped on the nameplate The line conductor between the feeder and separate controller must be of a size sufficient to carry the current and voltage as stamped on the nameplate The wiring connections between the feeder controller and power supply must be securely made in accordance with the wiring diagram A WARNING Be certain the equipment is properly grounded EB 05 EB 09 EB 11 EB 14 EB 17 EB 18 EB 22 EB 27 EB 32 4 1 2 7 3 4 Sq 9 1 2 Sq 12 1 2 Sq 15 1 2 Sq 16 Sq 19 1 2 Sq 24 1 2 Sq 29 1 2 Sq 114 mm 197 mm 241 mm 317 mm 394 mm 406 mm 495 mm 622 mm 749 mm 5 1 2 9 1 4 Sq 11 Sq 14 Sq 17 Sq 18 1 2 Sq 22 Sq 27 Sq 140 mm 235 mm 279 mm 356 mm 432 mm 470 mm 559 mm 686 mm 6 7 8 10 3 4 12 1 2 15 1 2 18 1 2 20 1 4 23 3 4 28 3 4 174 mm 273 mm 318 mm 394 mm 470 mm 514 mm 603 mm 730 mm 1 16 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 mm 3 mm 3 mm 3 mm 3 mm 3 mm 3 mm 3 mm 3 mm E 4 3 4 8 3 4 8 3 4 8 3 4 8 3 4 12 1 2 12 1 2 12 1 2 1
3. HOMER CITY g AUTOMATION SERVICE INSTRUCTIONS Syntron Vibrating Base Units EB Series CONTENTS PAGE IntrOdUCHON 5 senreste niini Er E EE D an Material Flowccies cotiascenieeras erie a a a Long Term Storage innser enn E rE ENARE NaS Installatie eiennenn a sing EEEE Operation w 6 6 6s anea E enantio vdiddeve de psincdysee etans Maintenanc sis naio viens EE geet dedian Beco cases Troubleshooting Guide seneese ereere rererere Air Gap Adjustments 0 ccceeececeeeeeeeeeneeeeeeaeeees Feeder Currents sessen nin aaea a a riaa OONN ADARA UVUN e A Safety Instruction Product Safety Labels must remain highly visible on the equipment Establish a regular schedule to check visibility Should safety labels require replacement contact Homer City Automation for an additional supply free of charge INTRODUCTION The Syntron EB Series Parts Feeder assembly is a dynamically balanced two mass vibrating system consisting of a bowl and bowl mounting cross arm coupled to an electromagnetic drive by means of leaf springs The base of the unit is isolated from the supporting structure by rubber isolator springs mounting feet The drive assembly consists of a core and an armature The core is connected directly to the base The armature assembly is located opposite the core assembly and is connected directly to the bowl mounting cross arm A system of leaf springs is connected at the top to the cross arm and at the bott
4. meter The meter reading reveals the same current as stamped on the equipment nameplate To determine the current of an RC unit follow the procedure as outlined on page 7 Refer to this instruction manual prior to installing adjusting or performing any maintenance on the Syntron EB Series Parts Feeders A WARNING Failure to follow these Service Instruction procedures could result in unsatisfactory performance damage or shortened service life or personal injury MATERIAL FLOW The following will provide a general description of material flow and how it is achieved by the vibrating stroke of the bowl Figure 2 illustrates the action of an object moving along the bowl surface During a vibrating stroke the bowl surface travels between its lowest point A to its highest limit C The bowl travels at its greatest velocity between A and B Although still traveling up and forward the bowl will decelerate between B and C On the upward stroke the object is in contact with the bowl from A to B At point B the velocity of the object becomes greater than the bowl and the object leaves the bowl surface on a free flight trajectory from B to D The object lands back on the bowl surface at a position further forward D This completes one cycle Each cycle imparts a forward and upward flight of the object and it lands further along the bowl track toward the discharge On equipment operation at 60 cycle rectified power supply this cy
5. of the support structure is most important and the following points must be carefully observed The support structure must have a natural frequency of at least 1 1 2 times the operating frequency of the bowl feeder Any supporting structure having a natural frequency close to the operating frequency of the bowl feeder is evidenced by excessive dynamic deflections at the points of support and can result in poor performance of the bowl feeder These conditions can be corrected by stiffening the supports with bracing etc It is important to bolt the Syntron EB Parts Feeder in its operating location with the foot locators to prevent misalignment of discharge location Refer to Table I for dimensions for mounting the isolator base A WARNING Do not operate the unit without first installing the rubber isolators with locators on the base The feeder unit must never come in contact with any rigid object or adjacent surface that could hamper the vibrating action of the feeder Any connections between the bowl and adjacent object must be flexible NOTE Never make any alterations or additions to the Parts Feeder Assembly without first contacting the Homer City Automation Homer City Automation will not assume responsibility for unauthorized alterations or additions to bowl or drive assemblies HOMER CITY g AUTOMATION The separate controller assembly when used should be installed as close to the feeder as possible preferably on a wall in a clean
6. striking can result in serious damage to the unit Refer to the Air Gap section on page 6 for the procedure to correct a striking condition Load the bowl with the parts to be conveyed Homer City Automation recommends the quantity of parts loaded in the bowl be determined so as not to interfere with the feed rate or orientation features of the bowl Usually one layer of parts is satisfactory Adjust the control knob to the desired output Clockwise rotation will increase feed rate while counterclockwise rotation will decrease the feed rate The parts will flow along the bowl track in a smooth and controlled rate of feed toward the discharge end of the bowl Many units incorporate bowls designed with special clips rejectors wipers air jets track modifications etc for positioning and orienting parts for a specific application These devices placed along the track and bowl wall are installed to exacting measurements NOTE Any damage or mechanical change to these features may stop the flow of parts or alter their orientation Instructions for these special features are not included in this manual These applications are described in special instructions furnished with the particular unit MAINTENANCE Syntron EB Parts Feeders require minimum preventive maintenance when installed properly and under normal operating conditions However the following points should be given careful consideration 1 Some materials tend to adhere and build
7. up on the bowl surfaces This is especially true of materials containing a greasy covering or any pulverized substance Material build up on the bowl should be removed as a daily practice Look for material build up particularly around and under hopper openings A WARNING A clean dry compressed air supply is recommended for general cleaning of these units The use of water may result in shorting of electrical components Diluted household ammonia or most common detergents are effective cleaning agents Do not use cleaners containing chloride 2 All details of the feeder magnet and controller should be kept reasonably clean 3 Never oil the spring assemblies This destroys the clamping effect of the spring pads NOTE If spring stacks are repainted do not paint between the springs 4 The controller door should always be kept closed Units designed with air operated orientation features will require a regulated dry air supply This supply system should consist of an air filter regulator and flexible air line Unless otherwise specified the air pressure supply at the manifold should always be set at 50 p s i 34 Mpa TROUBLESHOOTING HOMER CITY g AUTOMATION MALFUNCTION PROBABLE CAUSE CORRECTIVE ACTION Feeder operating below capacity too slow Low voltage Feeder in contact with rigid object Loose bowl Broken or dirty leaf springs Spring bolts improperly torqued Bowl or broken Unit improperly tuned
8. 2 3 8 5 1 32 9 1 4 9 1 4 9 1 4 9 1 4 13 13 13 13 121 mm 222 mm 222 mm 222 mm 222 mm 317 mm 317 mm 317 mm 315 mm 128 mm 235 mm 235 mm 235 mm 235 mm 330 mm 330 mm 330 mm 330 mm 2 1 4 2 1 4 2 1 4 2 1 4 3 1 2 3 1 2 3 1 2 3 1 2 57 mm 57 mm 57 mm 57 mm 89 mm 89 mm 89 mm 89 mm 9 32 11 32 11 32 11 32 11 32 11 32 11 32 11 32 11 32 7 mm 9 mm 9 mm 9 mm 9 mm 9 mm 9 mm 9 mm 9 mm TABLE OUTLINE DIMENSIONS OF EB PARTS FEEDER DRIVE UNIT OPERATION With the equipment properly installed in its operating location and all wiring completed the equipment is now ready for operation uly WARNING Close the controller door Before energizing the unit check all bolts for tightness Check the method of feeder support making certain that it is substantial and that the feeder is not touching any rigid objects Rotate the control knob counterclockwise to zero setting Energize the switchgear and gradually increase the knob setting A CAUTION When operating normally the feeder should perform with a smooth even stroke Ifa loud striking noise occurs immediately turn the control knob counterclockwise to zero and the striking should stop If the striking continues turn off the unit immediately HOMER CITY g AUTOMATION Striking is the result of the armature and core making contact Continued
9. are noted in the separate instructions pertaining to the specific feeder model FEEDER CURRENT The current rating of the unit can be checked by using a clamp on ammeter If the unit is operating from an RC power supply the reading must always be multiplied by a value of 1 7 A clamp on meter does not reveal the same current as stamped on the equipment nameplate due to the wave form characteristics of the feeder operation Therefore the 1 7 multiplier must be used PARTS FEEDER STROKE Feeder stroke is the distance the bowl surface travels in one complete cycle of vibration See page 2 This is measured from the forward upward limit of the vibrating stroke to the downward backward limit of the vibrating stroke The stroke of Model EB Vibratory Parts Feeder will vary depending on the size of the unit and the diameter of the bowl The maximum stroke of the EB 051 will range between 015 040 381 1 mm The maximum stroke of the EB 09 through 32 will range between 045 060 1 14 1 52 mm This stroke can be ready by applying a stroke gauge to the unit as illustrated in Figure 3 The stroke gauge must always be applied to the unit with the graduated lines on the gauge being perpendicular with the leaf springs of the drive unit Under vibration a black V will appear on the gauge The stroke can be read at the apex of this black V The graduated lines should appear solid black If lines are fuzzy the gauge is incorrectl
10. cle of material flow is repeated 3600 times per minute HOMER CITY g AUTOMATION The rate of feed is controlled by adjusting or varying the stroke of the bowl The number of strokes will remain constant to the power supply but the stroke length can be varied by the control knob to increase or decrease feed rate FEEDER STROKE OF OBJECT 7 r eS gt BOWL SURFACE TOP OF STROKE C 1 r r BOWL SURFACE NEUTRAL POSITION B 1 D 4 eee ee yee lt i er SURFACE BOTTOM OF STROKE A ACTUAL OBJECT TRAVEL PER CYCLE FIGURE 2 MATERIAL FLOW ON BOWL SURFACE LONG TERM STORAGE Inspect parts feeder for damage which may have occurred during shipment If damage is found notify the shipping carrier and Homer City Automation promptly Store the unit in a clean dry storage area Do not drop the parts feeder as the impact could cause damage INSTALLATION The feeder and controller when received should be carefully uncrated All packing bands paper etc must be removed A CAUTION Homer City Automation recommends lifting the unit by the base When selecting a location for the feeder consideration must be given to the area of support Larger units can weigh over 600 Ibs 272 kg and a support must be selected that will safely carry the full weight of the unit under loaded operating conditions The operating frequency of the unit versus the natural frequency
11. eight has been attached The stroke gauge reading will decrease If it is determined that a tuning correction is in order to increase or decrease the bowl stroke proceed as follows If the bowl stroke is to be increased more springs must be added and or existing springs must be replaced with thicker springs If the bowl stroke is to be decreased existing springs must be removed and or replaced with thinner springs Any spring alterations should be in small increments When changing springs a symmetrical pattern must be kept on the spring stacks if possible After each alteration to the spring arrangement the air gap should be rechecked and readjusted if required Homer City Automation Inc reserves the right to alter at any time without notice and without liability or other obligations on its part materials equipment specifications and models Homer City Automation Inc also reserves the right to discontinue the manufacture of models parts and components thereof
12. om to the base The bowl cross arm and armature assembly is joined to the base only by the leaf spring assemblies Figure 1 illustrates the basic construction of the Model EB Parts Feeder assembly AC versus RC operation Power is supplied to the feeder coils of an EB series vibrating base unit through a separate control This control in its simplest form consists of fuses control rheostat switchgear and either a rectifier on RC units or a triac on AC units 2010 Homer City Automation Inc All rights reserved SM0690 082010 HOMER CITY g AUTOMATION The rectifier supplied on RC units is used to convert alternating current into half wave DC current It does this by permitting the current to flow in only one direction and controlling the value of flow during each cycle CORE ASSEMBLY FIGURE 1 BASIC CONSTRUCTION OF EB PARTS FEEDER DRIVE UNIT The triac supplied on AC units permits current to flow in both directions and provides control over the period of flow during each cycle On RC units operating at 60 cycle rectified power supply the mechanical vibration cycle and the material flow cycle are repeated 3600 times per minute On AC units operating at 60 cycle triac controlled power supply the mechanical vibration cycle and the material flow cycle are repeated 7200 times per minute AC Feeder Current When reading the current of an AC unit with a clamp on ammeter the actual current is read directly from the
13. ted so the armature and core are too far apart the unit will draw high current and result in coil burning failure of control components or lace of material feed HOMER CITY g AUTOMATION The air gap is properly set at the factory However if high voltage is applied to the feeder or if the air gap has been moved due to improper handling an adjustment may be necessary To properly adjust the air gap follow the outlined procedure below while referring to the illustration shown in the instructions for the specified model NOTE The feeder must not be operating while the air gap is being adjusted 1 De energize the unit and loosen cap screws which secure the core assembly to the base loosen just enough to relieve holding pressure 2 Adjust the core assembly in the required direction either closer to or father away from the armature assembly a little at a time and equally on each side NOTE The air gap should be tapered slightly toward the center of the unit for optimum performance Field setting can be made with the core and armature parallel Do not exceed the current rating 3 When adjusting the air gap never set the gap so close that a striking condition results Never set the gap too far apart that it results in an excessive current rating Keep the gap as close as possible without striking After the air gap is adjusted satisfactorily tighten the cap screws securing the magnet to the base Air gap specifications
14. y positioned FIGURE 3 STROKE GAUGE HOMER CITY g AUTOMATION Homer City Automation Inc 57 Cooper Avenue Homer City PA 15748 Phone 724 479 4503 FAX 724 479 4767 Email info homercityautomation com Web www homercityautomation com TUNING To operate at peak efficiency each feeder must be tuned for its particular application Two factors must be taken into consideration The natural frequency of the unit and the applied frequency of the operating unit Natural frequency is the frequency of vibration observed when the power is turned off The unit will oscillate for a fraction of a second at its natural frequency with declining amplitude until it comes to rest Natural frequency is determined by the masses and the radial location of the masses above and below the spring system and the stiffness of the spring system The natural frequency of the parts feeder is set slightly below the operating frequency To check the tuning condition of a feeder the following steps may be taken 1 Apply a stroke gauge to the feeder bowl as outlined on page 7 2 Turn on the unit and record the reading on the stroke gauge 3 While still observing the reading on the gauge very gradually loosen one clamp on a spring stack Note the change on the gauge as you loosen the springs The stroke gauge reading will decrease Or Tightly clamp a small weight to the bowl and observe the change on the gauge after the w
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