Operating Instructions Laboratory Planetary Mill
Contents
1. Wi DE TM LAESA pA ZZZTYZZT 77 N p Wa A m ISS bes KE 2 39 O 9 8 2 Q7 FRITSCH GMBH Laborgeratebau Pulverisette 5 4 Planeten Kugelmuhle 21 01 91 emergency stop input voltage Switch microswitch hood o connector block on mounting plate B 3 4 5 6 7 8 9 10 1 12 13 14 15 16 17 18 19 20 OIOIOISIereleleleleleleijeesrelislslele L N OU ve Lm frequency inverter one coll transformer 11 kVA microswitch hood Lfd Stck ter zahl TTT z AT HUN connector block on frequency inverter Sieisisieigiel ie d a ST SL LBB e COPYRIGHT BY FRITSCH GMBH conn r block on mounting plote strip Agrminol on contactor and recycling over current relay _meosurement Input digital speed indicator overload protection LED safe load indicator 5V 100mA Eo mains output current transformer moins input FRITSCH GMBH HS D 6580 IDAR OBERSTEIN Moss S tab wiring P5 1 1 BEE PS durch 2 3 bersicht der Steueramechl0 sse S Drenrichrung Kore LED Drehrichtung 2 Rote LED Q Betrw sbereit une LED I0KN 10 Py Verz gerungszeit Pa Beechleunigungserelt Ps max Frequenz Pa min Frequenz Pe Typenpunkt Pe setat Spannungsan hebung DEA S Pal eae 1 bau l ean i gung Ur D H H H 1 H H H H H 1 H H H H H H H H H H H H H H H H2. the mill can be reset ready for operation by switching it off and then back on again with the EMERGENCY OFF button The whistling or singing sound made by the drive as the mill starts up or adjusts speed is caused by the frequency converter and the a c motor and does not have any negative influence on the functioning of the mill When operating with inserted grinding bowls and balls the sound is drowned by grinding noises Laboratory Planetary Mill pulverisette 5 Page 4 4 Choice of Grinding Bowls and Balls When selecting the material for grinding sets it is necessary to take into account the hardness of the sample and the permissible level of contamination caused by abrasion of the grinding parts even when the abrasion is only slight For the optimum grinding result it is necessary to determine experimentally the type material and size of the grinding bowls and balls the quantity of sample to be ground and the number of grinding balls per bowl Grinding bowls and balls can be supplied in the following materials information on the density is important for selecting the grinding balls Material Dens it Resistance bowls and balls g cm Agate 99 9 Si0 2 6 good Sintered corundum 1 99 7 A1504 3 7 good qualif ied Sintered corundum 2 85 A1504 3 5 satisfactory Zirconium oxide 975 Zr0 5 7 very good Syalon 90 silicon nitride 3 24 very good Polyamide bowl 1 4 adequate Teflon balls with steel core 5 0
3. H H H H H H t H H H H H H H H b H H i H i H H H H H H H H 99ecaca veo tasto e 550500 ccc69 i i 1 465069000099 coesa wes 99 94 6949 H H fee 1 i 4 e UH TTT GT nena neno oe Dn DLL EE RR ites 1 999 1508 1 799 8 Ze TTT ccoo neea E i 1 E i i i E i i E i i i 1 3 1 f i i 1 E E 1 E E 000 Cee EE ER E 002005 c0 Pulverteartte 3 in g Rage lbeasitieunigqung 4 i i DC gd 1108 09 eosssssssasacse40000059 nenne 2498 e9900020000099000920290092009000 990002 0000299 DEEN 19
4. The fineness of the particles increases the higher the speed Size of the Grinding Balls Coarse hard material is broken down more quickly using large balls although the degree of grinding fineness obtained after a standard grinding period will be considerably coarscr Using a large number of small balls enables optimal grinding fineness to be achieved but in the case of coarse hard material requires an excessively long grinding time These types of coarse hard samples should first be pre ground with large balls and then ground to the required degree of fineness with smaller balls in a second grinding process Mass of the Grinding Bowls The grinding process is accelerated by using grinding balls of higher mass specific weight Size of Grinding Balls The centrifugal force acting on the grinding balls in relativly large grinding bowls is correspondingly higher and the grinding performance is increased for identical grinding time Important Agglomeration of material when dry grinding When a certain degree of fineness is achieved there is an increased tendency towards agglomeration Depending on the characteristics of the material to be ground this effect can be of decisive importance even with grain sizes of less than 10 microns Due to the increasing surface forces the individual particles begin to stick to one another the grinding balls and to the sides of the grinding bowl The agglomeration and layers that have been formed
5. turning knob D 23 timer instrument foot D 50 ball bearing 60052 DIN 625 neddle bearing NKI 20 20 ballbearing 6008RS ball bearing 60102 v belt 10x670 4 bowles v belt 10x560 2 bowles support disc grey cast bowl plate support steel gripping power pot holder v belt13x8x1346 motor P5 frequency inverter SLP 550 1 relay motor overlaod relay 2 4 4A overload protection lifter P5 leaf screw M6x15 micro switch lid hinge leaf screw M6x15 pneumatic spring holder micro switch for interlocking magnet transformer 220V 1 1kW cutotransformer connector input voltage switch red E red g pin 19 20 input 100 110 200 220 240V WK 1 block pin 18 19 output 220V block white neutral pins connector block black on mounting plate 20 green 18 red Lfd Stck Nr zahl Benennung Sach Nr Benerkung CUPYRIGHT HE e dno FRITSCH BY Du FRITSCH GMBH D 6580 IDAR OBERSTEIN FRITSCH GMBH DI itte Cl grob es epes T qp reg ane laborette I isan een Boer emo wiring transformer and 777 Joem i a eee e UT NI ae input voltage switch EN orm poss ped x RR Kee eg es gt Ersetzt durch d p us gabe Lange length 740 mm Breite width 470 mm Hohe height 500 mm mE SL EENEG d NAAANANT BQ WV T N 722713 TET ASS N p li S S SN St 07 RIRI 62 o i A ef
6. 18 Page 15 Nr Un Ww N mP oo 0 so 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Ersatzteil Liste Labor Planeten M hle P5 4 und P5 2 30 10 92 Spare parts list Laboratory Planetery Mill P5 4 and P5 2 Artikelnr 05 112 13 93 910 000 92 608 13 86 417 00 86 422 00 86 416 00 05 160 13 81 403 00 81 405 00 81 479 00 93 405 00 82 504 00 82 603 00 82 513 00 82 511 00 82 011 00 82 012 00 05 114 12 05 119 09 90 047 00 82 010 00 81 265 00 81 380 00 86 520 00 81 407 00 81 100 00 93 402 00 81 460 00 92 919 00 92 166 09 05 145 00 81 465 00 86 850 00 Bezeichnung Haube Verdeckverschlu Griff Signalleuchte gr n Glimmlampe 220V LED Anzeige 3 5 stellig Frontplatte Knebelknopf D 40 Drehknopf D 23 Zeitschalter Ger tefu M10x27 D 50 Kugellager 60052 DIN 625 NKI 20 20 6008RS 60102 Keilriemen 10x6701i 4 Becher Keilreimen 10x5601i 2 Becher Nadellager Kugellager Kugellager Tr gerscheibe Tellertr ger ST 1191 Spannsatz P5 Topfhalterung Keilriemen 13x8x1346 Motor P5 Frequenzumrichter SLP 550 1 Motorschutz Motorschutzrelais 2 4 4A Platine berlastschutz P5 Schwingpuffer M6x15 Mikroschalter Deckelschanier Blattschraube M6x15 Gasfeder P5 Mikroschalter f r Haubenverriegelung Ringkerntrafo 220V 1 1kW Description lid alu cast lever close handle signal lamp low voltage neon glow lamp LED display front panel spindle shaped button D 40
7. 2 Drive Motor The drive motor is a three phase a c motor and requires no maintenance If for any reason the drive motor or its electronic control needs to be exchanged the control and motor should be realigned to each other before starting up the ball mill refer to Annex A for conversion instructions 7 Guarantee The guarantee card accompanying delivery of this unit must be completed and returned to the manufacturer to be valid FRITSCH GmbH Idar Oberstein and its Application Laboratory or its respective agency abroad will be pleased to provide further information and advice on request Any enquiry should be accompanied by details of the serial number given on the nameplate Laboratory Planetary Mill pulvcrisette 5 Page 9 Annex A 1 Examples The following examples from the Application Laboratory of FRITSCH GmbH provide information on the choice of grinding sets the optimum grinding time and fineness which have been achieved for various ginding samples Material Grinding bowl Grinding balls Grinding time Fineness Quantity Material Material Edge length Volume No x dia Ruby stone 140 g Cr Ni steel Cr Ni steel 3 min 100 250 jum 12 m 250 6 x 30 Titanium dioxide Tid dry and wet grinding in water 40 g Cr Ni steel Cr Ni steel 30 min 100 40 jum 2 m 250 6 x 30 Titanium dioxide Tid dry and wet grinding in water 409 50 ml Cr Ni steel Cr Ni stee 60 min 1005 10 um 2m 250 6 x 30 Coal dry and wet gr
8. 8 Use a 30 mm fork spanner to undo the securing nut of the two plate shafts use 13 mm fork spanner to hold the square bolt 9 Remove the V belt 10 Insert the plate shafts required for the conversion into the 30 mm bores and tighten slightly with a size 30 nut 11 Fit two V belts 10 x 670 so that in each case a V belt is fitted around two neighbouring pulleys and fixed pulley in the centre 12 Turn the eccentric of the four plate shafts in the same direction using a size 13 fork spanner 13 Use a suitable measuring tool e g slide gauge or depth gauge to measure the distance of the plate shafts from the outer edge of the support disc and adjust the plate shafts so that this dimension is the same for all and the V belts are taut at the same time dimension approx 23 mm 01 mm A similar procedure is adopted if the V belt of the plate sup ports have to be tensioned 14 Use a size 13 fork spanner to hold the eccentric firmly and tighten the securing nut using a size 30 fork spanner The fork spanner extension may need to be used 15 Then remeasure the distance from the plate shaft to the outer diameter of the support disc and correct the adjustment if necessary 16 Insert the base plate into the housing important remember to reinsert the rubber discs 8 x 20 x 2 5 between the base plate and the housing Laboratory Planetary Mill pulverisette 5 Page 12 17 Insert five securing screws into the base platc and
9. adequate Chromium nickel steel acidproof 7 8 good qualified Chromium steel hardened 7 8 good Tungsten carbide 93 WC 6 Co 14 7 very good Grinding bowls are available in various sizes and grinding balls in various diameters Grinding bowls Order number with cover and seal 500 ml 250 ml 80 ml useful content 80 300 ml 30 150 ml 1 50 ml Agate 50 105 00 50 205 00 50 405 00 Sintered corundum 1 50 106 00 50 206 00 50 406 00 Sintered corundum 2 50 107 00 50 207 00 Zirconium oxide 50 111 00 50 211 00 50 411 00 Polyamide bow 50 120 00 50 220 00 50 420 00 Chromium nickel steel 50 110 00 50 210 00 50 410 00 Chromium steel 50 109 00 50 209 00 50 409 00 Tungsten carbide 50 208 00 50 408 00 Recommended number of balls per grinding bow maximum Balls 10 m 100 50 30 or 20 m 20 15 5 or 30 m 10 6 or 40 mm 4 When 4 steel bowls 500 ml each are used only 8 balls 30 mm each per bowl are recommended Laboratory Planetary Mill pulverisette 5 Page 5 4 1 Notes for composition of Grinding Sets Normally grinding bowls and balls are selected from the same material since from a qualitative viewpoint only one contamination by possible abrasion is to be expected If one ignores this abrasion however the grinding duration can be reduced by using grinding balls of very heavy materials For exemple hartmetal tungsten carbide balls in steel grinding bowls or zirconium oxyde balls in Syalon respectively sintered corundum bowls
10. are suited Of course tungsten carbide or steel bowls should never be used in ceramic or agate bowls After the material has been selected for the grinding set in accordance with the sample to be ground the size and number and possibly the type of grinding balls is determined re fer also to point A 1 and the table on the last page of the enclosed brochure pulverisette 5 The size of the grinding bowl is determined by the quantity of material to be ground The following rules must be observed when determining the sizc of the grinding bowl Rules for Filling the Grinding Bowl Only two thirds of the bowl volume must be filled by the grinding balls and the sample A third of the bowl volume must be left frec for the centrifugal action to be effective The number and the size of thc balls is determined by the type of the material to be ground In this case it is generally true that the larger the number of the balls the shorter the grinding time and the narrower the grain size range of the ground material The following recommendations are made for selecting grinding balls Hard samples with larger pieces of material 30 40 mm balls Average piece size 2 5 mm 30 mn balls Fine materials G 0 5 mn 20 m balls Homogenisation of dry or liquid samples 10 m balls Homogenisation of viscous samples 20 m balls In rare cases it may also be beneficial to mix balls of different diameters If a sample consisting of large pieces o
11. Operating Instructions Laboratory Planetary Mill pulverisette 5 FRITSCH GmbH Manufacturers of Laboratory Instruments Industriestra e 8 D 6580 Idar Oberstein Telefon 06784 700 Telex 4 26 203 frits d Telefax 06784 70 11 e 900602VB Operating Instructions Laboratory Planetary Mill pulverisette 5 The pulverisette 5 is a universal laboratory planetary mill for quick dry or wet grinding to a fineness suitable for analysis purposes It comminutes inorganic and organic samples for analsis qualitity control or material testing For synthesis it is used for mixing and homogenizing dry samples emulsions or pastes The feed size for hard material should not exceed around 10 mm The maximum feed quantity is approx 800 ml when using 4 grinding bowls of 500 ml each and 10 grinding balls 30 mm diameter for each bowl The fineness which can be obtained within an appropriate grinding duration is Sum Safety Instructions Please read operating manual before starting up Never cut off safety devices Check the safety devices regularly Never open machine before complete standstill Operating and repair only by authorized personnel Operating only with safety glasses Do not reach into machine when running Pull off the plug before servicing Disconnect the mains plug before starting work on the unit 1 Method of Operation The sample is pounded and ground by grinding balls in the maximun four bowl
12. are thus not subject to any further comminution Only through so called wet grinding that is grinding where the material to be ground is slurried in liquid suspension can comminution of the material be continued further To stabilize the grain size obtained i e to reduce the formation of agglomerated material during or after grinding a tenside can also be added to the suspension liquid There is however no rule that generally applies for selecting a tenside since tensides have to be adapted to the characteristics of the material to be ground Laboratory Planetary Mill pulverisette 5 Page 8 6 Maintenance Important Disconnect the mains plug before beginning maintenance work The planetary ball mill requires no special maintenance Bearings of the rotating parts have permanent lubrication The V belts may need to be retightened after long periods of operation see point A 2 1 2 13 6 1 Cleaning The most important element of the maintenance work is that the parts be cleaned regularly The grinding bowls and balls should be cleaned after every grinding cycle This can be done by brushing off the grinding parts c g under running water using commercially available detergents Cleaning is also possible in ultrasonic baths The grinding parts can be heated up to around 250 C in a drying cabinet if sterilisation is required However grinding parts of agate may not be heated to over 110 C and must then be cooled down slowly 6
13. eration it is necessary to check the secure attachment of the grinding bowls after approx 3 hours of grinding Important Sample may become heated Laboratory Planetary Mill pulverisette 5 Page 3 3 6 Speed Control The speed of the ball mill can be freely selected from 0 rpm to a maximum of approx 360 rpm using the rotary knob 7 When the hood has been closed the planetary mill can be switched on with the timer The speed is determined by turning the potentiometer on the operating panel When the potentiometer is in the 0 position left hand limit position the mill does not start grinding By turning this potentiometer clockwise the mil is set in motion 3 seconds after the potentiometer has been turned the mill starts up and reaches the speed selected by setting the potentiometer The mill switches off as soon as the time set on the timer has expired or must be switched off manually by returning the switch lever to the OFF position The mill can thus be switched off at the end of the grinding process without turning the potentiometer back and similarly the mill can be turned on again without altering the position of the potentiometer In this way an optimum grinding speed once established can be retained for a subsequent grinding procedure The electronic control for the drive is equipped with a current monitor which switches off the drive in the very unlikely event of overload After opening and eliminating the fault
14. ety The green light indicating readiness for operation which is located on the control desk at the front of the mill indicates that the EMERGENCY OFF button on the left hand side of the unit is switched on i e is in the pulled out position The planetary ball mill is fitted with a safety switch 22 which breaks the circuit when the lid 1 is open thereby preventing the unit from starting up When the mill is switched off by means of the switch clock i e either after the expiry of the preset grinding time or after the the preset continuous operation has been switched off an electronic brake comes into effect bringing the mill to a halt after a few seconds An independent safety device 4 prevents the hood from opening while the mill is still running The hood can only be opened a short time after the drive has been switched off and has come to a halt Laboratory Planetary Mill pulverisette 5 Page 2 The safety EMERGENCY OFF button on the side of the unit allows the unit to be immediately disconnected from the power supply This switch should only be used to interrupt grinding in the event of an emergency once the button has been pressed the electronic brake no longer functions After the EMERGENCY OFF button has been pressed the hood must in no case be opened until the mill has come to a complete halt Caution Danger of injury The EMERGENCY OFF button disconnects the whole unit from the power supply For this reason i
15. f material is to be ground down to a range of few um in a single grinding cycle it is possible to mix e g 20 mm and 30 mm balls The large alls will break down th coarse material very quickly while the small ones accelerate grinding in the fine range Laboratory Planetary Mill pulverisette 5 Page 6 5 Start up and Operation 5 1 Filling the Grinding Bowls The grinding balls selected in accordance with point 4 1 are placed in the grinding bowl and only then is the material to be ground added Note Only fill up the grinding bowl to 2 3 of its volume See point 4 1 The sealing ring and cover arc fitted and the grinding bowl is inserted into the recess of the cylinder holder 17 on the cork disk 5 2 Clamping the Grinding Set The lock nut of the clamping set is firstly screwed back to the head of the clamping screw After the clamping arm has been inserted into the openings of the cylinder holder the clamping screw is screwed down until the grinding bowl is held firmly in position The lock nut is used to fix the clamping screw so that the latter can no longer be turned by hand If an 80 ml grinding bowl is used a reducing adapter order number 53 050 00 is fitted onto the grinding bowl before the grinding set is clamped However it is also possible to place two such grinding bowls one over the other If the quantity of the material to be ground only fills one of the grinding bowls the unit must be balanced by clamping an empt
16. in 100 5 mm 500 10 x 30 Sugar wet grinding in alcohol 200 g agate agate 45 min 100 im 500 10 x 30 Sausage meat goods wet grinding in water 100 g sintered cor 1 sintered cor 1 30 min homogen 5m 500 10 x 30 Artemia salina embryos 4g zirconium oxide 20 min 100 2 mm 80 5 x 20 Grass dried as hay 35 g sintered cor l sintered cor 1 7 min 100 50 mn 500 10 x 30 Laboratory Planetary Mill pulverisette 5 Page 11 A 2 Instructions for Upgrading to Four Grinding Bowl Holders Caution Work on electrical equipment may only be performed by an expert The pulverisette 5 2 with 2 grinding stations can be upgraded to a planetary ball mill with four grinding stations For this purpose the conversion kit order number 05 220 00 is assembled in accordance with the following instructions These instructions also apply in a similar manner for changing the bearing of the plate supports 16 in the event of wear 1 Open the unit and remove the cork discs in the clamping device 17 2 Remove the hexagon socket screws using a 6 mm box spanner and remove the holder 3 Remove 4 screw covers unscrew the screws with a size 13 fork spanner lift off the cover plate and the 4 spacer bolts 4 Stand the unit upside down on a soft base 5 Remove the five securing screws from the base plate 6 Disconnect the motor detach Phoenix terminals 1 2 3 and 4 on the electronic control 7 Lift out the base plate and put it to one side
17. inding in water 5g Zirconium oxide 120 min 100 15 jum 0 5 m 80 5 x 20 Coal dry and wet grinding in water 5g 5 ml Zirconium oxide 120 min 100 15 um 0 5 m 80 5 x 20 Aluminium oxide Silicon dioxide 100 g WC Co WC Co 90 min 90 lt 20 jum 0 1 mn 250 15 x 20 Ferrovanad ium 70 g WC Co WC Co 20 min 70 lt 100 jum 3m 250 5 x 30 Glass 50 g Agate Agate 15 min 100 90 jum 4 mm 250 15 x 20 Silicon carbide dry and wet grinding in water 15 g WC Co WC Co 30 min 100 lt 150 jum 3m 80 5 x 20 Silicon carbide dry and wet grinding in water 15g 5 ml WC Co WC Co 45 min 100 lt 71 jum 3 mm 80 5 x 20 Rock phosphate 40 g Cr steel Cr steel 2 min 1005 250 um 3 m 250 15 x 20 Laboratory Planetary Mill pulverisette 5 Page 10 Material Grinding bow Grinding balls Grinding time Fineness Quantity Material Material Edge length Volume No x dia Manganese oxide MnO dry and wet grinding in water 50g 40 ml WC Co WC Co 60 min 100 0 1 m 250 15 x 20 Sewage sludge 180 g A150 A1303 30 min 100 lt 250 jum 8 m 500 10 x 30 Active charcoal wet grinding in water 150 ml Cr Ni steel Cr Ni steel 30 min 100 0 025 mm 250 15 x 20 Gypsum 300 g Cr steel Cr steel 20 min 100 10 mm 500 10 x 30 Albumen 50 g sintered cor 1 sintered cor 90 min 90 20 mm 250 6 x 30 Corn barley 100 g sintered cor 1 sintered cor 1 20 min 100 3 m 500 3 x 40 Noodles 100 g sintered cor 1 sintered cor 1 3 m
18. lt lift out the motor Before the belt pulley on the motor shaft is removed the distance to the screw flange of the motor must be measured The pulley must be refitted on the replacement motor at the same distance since only then can the V belt run correctly The replacement motor is fitted in the reverse sequence of steps The plug and the connections of the control pcb must be reconnected in the same way Laboratory Planetary Mill pulverisette 5 Page 13 A 3 2 Exchanging the Electronic Control Please quote the unit number when ordering replacement parts 1 Open the unit and remove the cork discs in the clamping device 17 2 Remove the hexagon socket screws using a 6 mm box spanner and remove the holder 3 Remove 4 screw covers unscrew the screws with a size 13 fork spanner lift off the cover plate and the 4 spacer bolts 4 Stand the unit upside down on a soft base 5 Remove the five securing screws from the basc plate 6 Disconnect the motor detach Phoenix terminals 1 2 3 and 4 on the electronic control 7 Lift out the base plate and put it to one side 8 Detach both plug terminals from the frequency converter 9 Unscrew the securing screws in the exposed fastening rail and remove the rail 10 The whole frequency converter is then lifted out of its lower holding rail and placed to one side Reverse these steps to install a replacement converter The two connection plugs to the frequency converter must be c
19. onnected exactly as before A 3 3 Alignment of the Motor Control The electrical equipment is aligned to the planetary mill drive motor before replacement frequency converters are dispatched It is not necessary to carry out an alignment in the unit after the electronics have been replaced The setting potentiometers on the electronics must not be altered Laboratory Planetary Mill pulverisette 5 Page 14 List of Contents Point Safety Instructions 1 Method of Operation 2 Setting up the Planetary Mill 3 Electrical Connections 31 Agreement of Voltage and Current 3 2 Operating Safety 33 Electrical Fuses 3 4 Speed Control 3 5 Timer switch 4 Choice of Grinding Bowls and Balls 41 Notes for composition of Grinding Sets 5 Start up and Operation 5 1 Filling the Grinding Bowls 52 Clamping the Grinding Set 53 Switching on the Planetary Mill 5 4 Grinding Fineness 6 Maintenance 6 1 Cleaning 6 2 Drive Motor 7 Guarantee Annex A l Examples A 2 Instructions for Upgrading to Four Grinding Bowl Holders A 3 Exchanging the Drive Motor and Electronic Control A 3 1 Exchanging the Motor A 3 2 Exchanging the Electronic Control A 3 3 Alignment of the Motor Control A 4 1 Spare parts list A 42 Circuit diagram A 4 3 Wiring diagram A 4 4 Other diagrams motor speed impact energy Laboratory Planetary Mill pulverisette 5 Page hWWWN NY t2 C UA oo N zl J hone 10 10 12 13 14 14 16 i7
20. s Acting on the grinding bowl contents consisting of material to be ground and the grinding balls is the centrifugal force produced from the grinding bowls rotating around their own axes and thc centrifugal force produced by the rotating support disk Since the grinding bowls and the support disc are rotating in opposite directions the centrifugal forces act alternately in like and opposed directions This causes the grinding balls to run down the inside wall of the bowl the friction effect followed by the material being ground and the grinding balls lifting off and travelling freely the inner chamber of the bowl and colliding against the opposing inside wall the impact effect This impact effect is intensified considerably by the grinding balls impacting with each other The grinding balls in pure planetary ball mills attain considerably higher impact energy than is possible with pure gravity or centrifugal ball mills Depending on the speed set for the ball mill this cnergy can amount to twenty times the earth s acceleration This mill can therefore grind a very high quantity of material in a relatively short time Since the grinding bowl is sealed off by a sealing ring and a cover materials can be ground without loss even when grinding in suspension Laboratory Planetary Mill pulverisette 5 Page 1 2 Setting up the Planetary Mili The planetary ball mill should bc set up on a flat stable base It need not be secured to the ba
21. se but should be easily accessible Its large rubber feet 9 can be adjusted in height to compensate for any unevenness 3 Electrical Connections 3 1 Agreement of Voltage and Current Before connecting the ball mill the voltage and current values specified on the nameplate and the voltage that can be read on the selector switch must be checked for agreement with the values of the power supply to be used To adapt the equipment to the voltage of the intended power supply which may be necessary use the voltage selector switch On the reverse side of the mill next to the built in inlet connector for non heating apparatus for the enclosed connection cable there is a voltage selector switch with which an autotransformer in the equipment was set to the intended supply voltage before delivery With this selector switch the mill can be adapted to a supply voltage ranging from 100 to 240 volts To do this set the slot to the corresponding number with a screw driver On the opposite side however there is no number opposite the slot it points to the separation sign between two numbers 100 110 200 220 240 volts of alternating current with a protective conductor fuse 16 amps The EMERGENCY OFF button Red Button on the left hand side of the unit must be pulled out The green display indicating readiness for operation is illuminated when the EMERGENCY OFF button is in the pulled out position i c it is switched on 3 2 Operating Saf
22. t is also used to switch off the mill for longer periods of non operation night time dis connection The EMERGENCY OFF button is switched on again by simply pulling out the red button 3 3 Electrical Fuses The equipment fuse is located on the reverse side of the housing in the built in inlet connector for non heating apparatus and can be reached by opening its cover Spare finc wire fuse t 10 5 x20 3 4 Control and Drive Motor The ball mill is driven by a threc phase current motor the speed of which is controlled by means of an electronic module A frequency converter transforms single phase 220 volt alternating voltage into three phase 220 volt alternating current Depending on the position of the potentiometer on the operating panel of the mill a definite frequency is specified and at the same time the drive motor is forced to run at the corresponding speed The electronic control for the drive is equipped with a current monitor which switches off the drive in the very unlikely event of overload After eliminating the fault which has blown the overload fuse the mill must be switched off with the EMERGENCY OFF button or it must be separated from the mains in order to neutralize the fuse Only then can it be put back into operation 3 5 Timer switch A grinding time approx 2 60 min can be preset by means of a built in timer 8 By turning the switch anti clockwise continuous operation is set When working in continuous op
23. tighten securely 18 Connect the motor attach Phoenix terminals 1 2 3 and 4 to the electronic control Protective conductor located in terminal 1 19 Turn the unit the right way up 20 Insert four spacer bolts fit the cover plate screw it on with hexagon socket screws and fit screw covering 21 Switch on the unit and check the concentricity of the cover disc if necessary readjust it by shifting the cover disc appropriately 22 Fit 4 bowl holders and screw on with hexagon socket screws insert cork discs 23 Switch on the unit for a trial run and check for unbalance slight uncritical unbalance may be caused by bowl holders A 3 Exchanging the Drive Motor and Electronic Control A 3 1 Exchanging the Motor Please quote the unit number and motor type when ordering a replacement motor 1 Open the unit and remove the cork discs in the clamping device 17 2 Remove the hexagon socket screws using a 6 mm box spanner and remove the holder 3 Remove 4 screw covers unscrew the screws with a size 13 fork spanner lift off the cover plate and the 4 spacer bolts 4 Stand the unit upside down on a soft base 5 Remove the five securing screws from the base plate 6 Disconnect the motor detach Phoenix terminals 1 2 3 and 4 on the electronic control 7 Lift out the base plate and put it to one side 8 Unscrew the securing screws inside the motor console 4 x M6 hexagon socket screw No 5 and after removing the V be
24. y bowl of appropriate weight complete with cover and sealing ring into the opposing cylinder holder no balls in empty bow 5 3 Switching on the Planetary Mill Before closing the lid 1 of the ball mill a further check should be made that the grinding sets and clamping sets are fitted securly Then close the lid and secure it with the two closures Turning the rotary knob 7 counter clockwise sets the speed to 0 After switching on the unit with the timer 8 the rotary knob 7 can be turned to gradually increase the number of revolutions and to sct the desired rotational speed Good and rapid grinding is obtained when the balls can be clearly heard to be knocking in the grinding bowls When working in continuous operation it is necessary to check the secure attachment of the grinding bowls after approx 3 hours of grinding Laboratory Planetary Mill pulverisette 5 Page 7 5 4 Grinding Fineness The fineness of the ground material depends first and foremost on the grinding time The fineness is also influenced by the rotational speed i e the set speed of the ball mill the number and size of balls their mass i e their material type and the size of the grinding bowls With dry grinding the fineness which can be obtained is generally about 20 um and with wet grinding lt 5 pum Grinding Time The grinding time required depends of the material A long grinding time increases the fineness of the particles Speed
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