MT Service Manual
Contents
1. leads from terminal block when fitted Now remove the 2 4mm screws and washers 40 from tacho brush gear and take out brush gear complete Taking care not to damage tacho brushes 3 Remove circlip 4 from front of tacho armature 13 and unscrew tacho sleeve locking set screws 14 located just in front of the commutator 4 Take out tacho armature noting the number and position of any shim washers both in front and behind the tacho armature sleeve To assist with the removal of the tacho armature leverage can be applied behind the set screws or directly into the tapped sleeve holes Ensure that the set screws have been removed completely or have been slackened off sufficiently to clear groove in shaft Note No shims or circlips were used to locate the tacho armature on motors produced prior May 1984 5 Remove the oil seal when fitted from the drive end cover The oil seal must always be replaced with a new one when reassembling Remove 4 5mm Nyloc nuts 22 from the counter bored holes in the drive end cover See note 8 for brake motors 6 Body 10 and drive end cover 8 can now be separated from the commutator end housing 11 and main armature 1 The drive end cover is pinned to the body using roll pin 9 TAKE CARE Note Pre May 1984 motors produced for Bridgeport had the drive end bearing bonded into the drive end cover 7 To separate the main armature from the commutator end cover enta2. uid BAG 19p09u4 8z 19409 dey JapjoH usnig 92 deo JepjoH ysnig Gc ysnig JO O v2 INN pnis Bulxid Ce puel sIQeD 84 49N0DUZ OUDE 13409 1SeO L INN Bulureyoy oyoeL QI Jaysen Bulurejay oyde S qui8ssv 1299 ysnig ouop rL S AIn euuvy ouop ej Alquassy Apog oyoe A jqw ssy 13409 pu4 Joyejnwwoy LL A quassy Apog OL 19409 pug anq g JOUSEM ALM pug j1ole nuiuuoo Buue g puq Aauq dli 911O pu3 Augq Buue g Ajquassy in euuuv 1010 S 1 pP JO US eul BOS BVSES qd 000Z isnBny souls zz LI 94 0 pay u q sey oyog oibjoug Olpey ASU V 8910N NOILdIdOS3d ON WALI 3S1 sued ZZLW MT MTS30 servicing instructions Before commencing any dismantling it is important to mark the following relationships with either a marker pen or some similar method a Commutator end housing to motor body A to B b Drive end cover to motor body C to D DISMANTLING THE MOTOR 1 Removing the motor brushes 24 seals 25 and caps 26 marking both the carbon brushes and brush holders to ensure that the brushes can be refitted in the correct holders and the correct way around 2 Remove either the pressed steel or cast cover secured by 4 screws in Some case as encoders and adaptors are fitted these must also be removed Important The tacho brush gear 15 and comm end housing 11 must be marked to retain relationship for re assembly again use a scribe or marker pen Disconnect the tacho
3. 0 yoojg Ieuluu l J YSEM S90 e8S nN PNIS Bulxij JOYSEE Pl xog euru Pr xog Ieuluu ysep xog jeuiwaL xog euluu ejd 13409 JOYSED l d 13409 Ajqw ssy sear usnig soyesousHoyUoR MOIS Bulurejay sunyeuuy Ouop Ajquiassy nyewy JoyesoUsGHoyoe Ajquassy Apog Joresauebouoe Ajquassy 193409 pug JoyeynwWwwoy Ajquiassy Apog UOIINDO7 13409 3 q jamoq Buuds 1 AOO pug sAuq JOUSEM SAPAA pug JOJEINWWOD dijo pug JoveINWWOD Buue g pug auq dIo pug auq dl 941O pug SAuq Buue g Ajquiassy nleuuv NOI LdldOSd3G orn C F LO CO F Z lt OO Ob OO CN cC F LO O F lt CO O OO QN C sF LO OR OO O gt Y Y Y Yw w w w w w QN CGN CGN CGN CGN CN CN CN CGN CN C CD C CQ C C C CQ OT TFT QN C F 0O CO NO ON WALI 3S1 sued OV LIN Q MT52 servicing instructions The 52 series servomotors is a locked drive end bearing motor with the tachogenerator armature located and locked in position on the armature shaft by two set screws Due to the physical size and weight of the motors it is advisable to have a suitable stand to enable the motors to be handled in a convenient manner This will also help to minimise the risk of damage during dismantling and re assembly j Before commencing any dismantling it is important to mark the following relationships with either a marker pen or some similar method a Commut
4. RIPPLE Ti a Apply 90 Volts DC to terminals A1 amp A2 with A2 supplied positive the motor should run anti clockwise Check speed and current b Reverse motor i e A1 positive Check speed and current at 90 Volts DC If the two speeds are within 20 revolutions per 1 000 then the neutral setting is acceptable If not to alter speed loosen off nuts 22 and move commutator end cover away from the direction of rotation to decrease speed After setting the speed tighten down the nuts 6 to 13 5Nm 10lbs ft TACHO ADJ USTMENT 12 13 14 Tacho adjustment is most critical and necessary in all cases If the tacho armature is replaced resetting of the tacho brush rocker assembly is necessary To do this the motor is run at 1 000 rom with a DC voltmeter and oscilloscope connected to the tacho brushgear leads T1 amp T2 with a 0 1 mfd capacitor connected across the tacho leads The oscilloscope is set to AC input volt division set to 0 1 and time base set to say 0 2 or 0 5 seconds Check that when the machine runs clockwise T1 is positive The tacho brushgear must be adjusted by rotation To give a minimum ripple voltage height in both directions of rotation This height should not be greater than 2 x tacho output volts x 0 01 The height reading with the scope closed down includes all irregularities such as modulation and spikes By opening up the time base to say 5 milliseconds the actual shape of the output can be studied a
5. Radio Energie tacho was introduced to this motor series in August 2001 The assembly sequence for the Radio Energie tacho differs slightly from the SEM unit in that the armature is assembled first and then the integral body brushgear assembly As an assembly the Radio Energie tacho is directly interchangeable with the SEM unit however the individual components and brushes are not MT40 series The SEM tacho will continue to be fitted to this series MT52 and DBMT52 series The SEM tacho will continue to be fitted to this series If you require further information regarding the tacho fitted to our brushed servomotor series please contact our Service Dept WARNING servomotors contain magnetic material which will attract metal particles Care should be taken when dismantling motors to avoid this All D C servomotors manufactured by SEM contain magnets which are air stable and can be dismantled without demagnetisation SEM Limited Faraday Way Orpington Kent BR5 3QT England Telephone 44 O 1689 884700 2 Fax 44 0 1689 884884 a E mail info sem co uk D _ UL VERSIONS Internet htto www sem co uk AVAILABLE we controlled motor technology
6. WARNING Servomotors contain magnetic material which will attract metal particles Care should be taken when dismantling motors to avoid this All D C servomotors manufactured by SEM contain magnets which are air stable and can be dismantled without demagnetisation controlled motor technology b MOTORS WITH BRAKES Assemble wave washer and bearing to drive end cover and re fit brake assembly Position drive end cover over drive shaft and rest on fixing studs 31 Reconnect brake leads keeping leads well away from any moving parts Reposition drive end cover over fixing studs and press drive end cover onto armature using a suitable fixture Assemble tachogenerator to motor and lock in position with nut and washer 15 amp 16 MT 22 servicing instructions Before commencing any dismantling it is important to mark the method a Commutator end housing to motor body A to B b Drive end cover to motor body C to D It is advisable to have a suitable stand available to enable the motor to be handled in a convenient manner to minimise the risk of causing damage to any components DISMANTLING THE MOTOR j Remove the brush holder caps 26 and remove the motor brushes 24 marking both the motor brush and brush holder to ensure that each brush can be refitted the right way around in its original holder Remove cast cover 17 remove encoder adaptor when fitted take care whilst dismantling not to damage th
7. ator end housing to motor body A to B b Drive end cover to motor body C to D DISMANTLING THE MOTOR 2 Remove caps 26 seals 25 and brushes 24 marking both the carbon brushes and brush holders to ensure that the brushes can be refitted in the correct holders and correct way around Disconnect the tacho leads from terminal block 23 when fitted Remove the steel covers or encoder and adaptor plate assembly secured by 4 screws to end of commutator end housing IMPORTANT The Tacho brush gear and commutator end housing must be marked to retain relationship for reassembly Again use a marker pen or scribe Now remove the two 4mm screws and washers securing the tacho brush gear assembly and take out brush gear complete taking care not to damage the tacho brushes Unscrew the two tacho set screws 14 located in front of the commutator and remove the tacho armature To assist in the removal leverage can be applied behind the set screws or directly into the tapped holes wish set screws removed Ensuring that the set screws are either removed completely or slackened sufficiently to clear the groove in the shaft Position motor vertically on drive end cover on a suitable stand Remove the 4 Nyloc nuts 22 and flat ended washers from the radial slots in commutator end housing Disconnect the brake leads from terminal block 23 when brake fitted Remove the commutator end housing taking care not to lose the wave washer 7 from
8. bly vertically with drive end shaft down Slide body assembly 10 over the armature take care of magnetic pull see note 6 and locate on drive end cover ensuring the correct alignment Stand the assembly vertically with drive end shaft down Refit commutator end cover over the fixing studs 31 ensuring that the wave washer 7 is in position and fit to motor body taking care to align markings as in operation 1 Lock commutator end cover with flat sided washer and fixing stud nuts 22 On brake motors Assemble brake to armature and press on bearings Refit circlip and tacho drive pin Refit drive end cover to armature locate brake in original position refit the four screws and secure to drive end cover Reconnect brake leads insulate joint and keep any slack away from the armature Refit body assembly and commutator end cover as in operation a ensuring that the brake leads are passed through into the terminal box whilst assembling the comm end cover Refit motor brushes sealing discs and caps Assemble tacho armature and locate on drive pin 83 refit tacho brush gear to tacho body 12 passing leads through into terminal box align with markings and secure tacho brush gear Adjust position of tacho armature so that brushes are approximately 0 10mm for the front edge and lock set screws tightening up screw marked with red paint or a file mark on tacho sleeve and then tighten up the apposition screw CHECK SPEED CURRENT AND TACHO
9. crease speed move body opposite to direction of rotation Maximum speed deviation between the two speeds in opposite directions should be in the order of 30 revolutions per 1000 R P M After setting the neutral torque the Nyloc nuts to 4 75Nm 3 lbs ft Tacho adjustment is most critical and necessary in all cases If the tacho armature is replaced re setting of the tacho brush rocker assembly is necessary To do this the motor is run at 1000 R P M with a DC Voltmeter and oscilloscope connected to tacho brush gear leads T1 and T2 with a 0 1 mfd capacitor across T1 and T2 The oscilloscope is set to AC input volts division set to 0 1 and time base seconds division closed right down to say 0 2 or 0 5 seconds Check that when the machine runs clockwise T1 is positive The tacho brush gear must be adjusted by rotation to give a minimum ripple voltage height reading in both directions of rotation This height should not be greater than 2 x tacho output volts x 0 01 The height reading with the scope closed down includes all irregularities such as modulation and spikes By opening up the time base to say 5 milli seconds the actual shape of the output can be studied and any faults identified Spiking or mushiness could indicate that the commutator requires cleaning Open circuits will show as a very large irregular pulse with a break in the continuity of trace whilst short circuits will show as large spiking pulses Run motor at maximum
10. e O rings encoder and encoder adaptor when fitted REMOVAL OF TACHO ASSEMBLY tensions are correct as the tension is slackened when tacho brushes are removed from their holders To avoid this occurring the brushes can be individually captured in their holders by pushing the tacho brush into the holder and fitting a pin in the holes provided on the front of brush holder This can be done during the dismantling procedure to avoid re tensioning the brush spring In the event of the main armature being changed the neutral setting on the motor must be checked This can be achieved by applying an appropriate DC voltage the applied voltage is dependent upon the maximum voltage listed on the nameplate to motor leads and checking that the speed in both directions are within 30 revs per 1 000 rpm for same applied volts To increase speed loosen the two Nyloc nuts 22 and move body assembly in the direction of rotation relative to the commutator end cover To decrease speed move body assembly in the opposite direction After setting neutral position torque the Nyloc nuts to 4 75Nm 3 lbs ft Check tacho assembly for correct voltage output and ripple using a DC volt meter and oscilloscope To do this motor must be run at 1 000 rpm If tacho ripple is out of spec 1 check that the 2 Mark position of tacho brush gear assembly to retain the brush spring is located on the slot provided on tacho brush and relationship with tacho body asse
11. ejJgu BouoSe l pug auq dIo pug aang Buue g Ajquiassy nyeuy NOI LdldOS3G O CN C F LO CO lt OO O O5 CN cC F LO CO lt OO O OO Q C sh LO cO FN OD O O gt Y Y Y w w w w w w QN CGN CGN CN CGN CGN CN CGN CN CGN C C C CQ CQ C GC C C QC ST N C F 0O CO NO WALI 3S1 sued OF LW s e p JO 9 us JeUull 9s sp qd 0002 Isnbny UIS OES LI OE LIN OU 0 poll u q sey oyog j aibieuz oipey MSU V SION MT40 servicing instructions The MT40 Servomotor is a locked drive end bearing motor with the tacho armature located and locked in position on the shaft by two set Screws Before commencing any dismantling it is important to mark the following relationships with either a marker pen or some similar method 1 a Commutator end housing to motor body A to B b Drive end cover to motor body C to D DISMANTLING THE MOTOR 2 Remove the motor brushes 24 seals 25 and caps 26 marking both the carbon brushes and brush holders to ensure that the brushes can be refitted in the correct holders and the correct way around 3 Disconnect the tacho leads from the terminal block 23 when fitted and remove either the pressed steel or cast cover 17 secured by 4 screws in some cases an encoder and adaptor are fitted and these must also be removed Important The tacho brush gear and
12. ers and bearing from armature assembly 1 Remove circlip shims and bearing from drive end cover and take out tacho drive pin 33 and remove commutator end bearing 5 7 To dismantle brake motors after removing the Nyloc nuts 22 separate commutator end housing 11 from body assembly 10 as far as brake leads slack allow Using rubber or hide mallet tap drive end cover to allow for leverage of body assembly Lever body assembly to form a gap of 60mm 2 and fit spacers to hold in position Disconnect or unsolder joints in brake leads Remove commutator end housing and body assembly then press or tap off drive end cover and brake assembly Care to be taken not to damage the brake Remove brake assembly from drive end cover secured to cover by 6 screws in the front face of cover to change drive end bearing RE ASSEMBLY OF MOTOR 8 Bearings and oil seals must be replaced whilst brushes can be examined for wear and replaced if required Refit wave washer at the commutator end Care must also be taken to ensure no metal particles have been attracted to any magnetised parts Important SEM motor technology 10 TI 12 13 When pressing on bearings pressure must only be applied to the inner race ring To reassemble motor using the existing armature ensure that all markings made under notes a and b are in line Ensure before assembly that the tacho armature drive pin has been refitted to the ma
13. ils the removal of 2 4mm screws and washers 39 locking the commutator end bearing to the cover This operation is carried out using a right angled screwdriver or in case of difficulty the armature can be pressed out through the bearing affording easy access to the screws Ensure tacho pin 33 is removed with a pair of pliers before pushing out armature Prior to May 1984 the commutator end bearing was not locked the thrust washer being fitted at that end 8 To dismantle brake motors it is necessary after removing the four Nyloc nuts in the drive end cover to remove any circlip and shims from in front of the drive end bearing Separate the drive end cover from the body by approx 40mm 1 and unsolder or disconnect the joints made in the brake leads The drive end cover brake and bearing assembly can now be removed Prior to May 1984 motors with integral brake had the drive end bearing locked between the brake and cover on the outside diameter and between a shaft spacer and circlip on the shaft On this style of motor if the cover brake and bearing assembly fail to separate from the main armature the armature can be pressed out Circlip not fitted to press fit bearing SEM motor technology RE ASSEMBLY OF MOTOR 9 10 ala 12 13 Bearings must be replaced whilst brushes can be examined for wear and replaced if required Refit Wave Washer 7 Care must also be taken to ensure no meta
14. in armature shaft The drive end bearing is located in the drive end cover shimmed to eliminate axial movement and locked by an internal circlip 4 in the end cover bore Press drive end cover assembly and comm end bearing 5 onto armature 1 shaft It is necessary after assembling the drive end cover to shim out the axial end play by fitting shims between bearing and circlips 3 Refit body assembly and commutator end housing using an old tacho armature or bung located in the tacho body assembly 12 to centralise the armature during the assembly On brake motors a spacer must be used to separate the body assembly and drive end cover by 60mm 2 Refit commutator end housing see note regarding centralising the armature and reconnect or solder brake lead joints Take care to insulate the joints and that the leads are tucked well away from any moving parts To assist when fitting brake and end cover assembly on to brake hub a voltage should be applied to brake leads See motor nameplate for correct Voltage When refitting the tacho armature the armature is put onto the shaft without the set screws being tightened The tacho brush gear is then fitted and the tacho armature is set along the shaft until the brushes are approximately 0 25mm from the front edge of the commutator The two set screws should then be tightened ensuring that the screw marked by a file mark red paint on the sleeve is tightened first Ensure that the brush gear is l
15. ined up as note 3 In the event of the main armature being renewed the neutral setting of the machine must be checked This is carried out by applying a known DC voltage to terminals or leads A1 and A2 say 80 or 90 volts and checking that the same speed is obtained in both directions for the same applied voltage To increase speed loosen the four Nyloc nuts in the drive end cover C and move the motor body in the direction of rotation relative to the commutator end cover To decrease speed move body opposite to direction of rotation Maximum speed deviation between the two speeds in opposite directions should be in the order of 30 revolutions per 1000 R P M After setting the neutral torque the Nyloc nuts 22 to 7 5Nm 5 Ibs ft Tacho adjustment is most critical and necessary in all cases If the tacho armature is replaced re setting of the tacho brush rocker assembly is necessary To do this the motor is run at 1000 R P M with a DC Voltmeter and oscilloscope connected to tacho brush gear leads T1 and T2 with a 0 1 mfd capacitor connected across T1 and T2 The oscilloscope is set to AC input volts division set to 0 1 and time base seconds division closed right down to say 0 2 or 0 5 seconds Check that when the machine runs clockwise T1 is positive The tacho brush gear must be adjusted by rotation to give a minimum ripple voltage height reading in both directions of rotation This height should not be greater than 2 x tacho out
16. l Pr xog Ieuluu ysep xog euluu xog euluu Be dq JOAOD Oyoe JOYS d e q JOAOD OUD Ajquiassy 1299 usnig oyde MOIS BHulurejey sunyeuuy Ouop Ajquiassy sunjewuy oyde Ajquiassy Apog oye jqw ssy 13409 pug Joyejnwwoy Ajquiessy Apog UOITED07 13409 Q q j amoq Buuds 1 AOO pug sAuq JOUSEM SAPNA pug Jole nuutuuoo Buue g pug auq dIo pug auqg Bune g INJEUUY 1010 NOI LdlddOS3GQ ON WLI 1SI sued ZS LIN IMPORTANT CHANGE TO TACHO SPECIFICATION In order to concentrate our production efforts directly on the production of servomotors we no longer make and fit the SEM tacho to certain products in our range In place of the SEM tacho we now fit a tacho made by the company Radio Energie Please note the following changes to motor specifications MT22 series The Radio Energie tacho was introduced to this motor series in August 2000 The assembly sequence for the Radio Energie tacho differs slightly from the SEM unit in that the armature is assembled first and then the integral body brushgear assembly As an assembly the Radio Energie tacho is directly interchangeable with the SEM unit however the individual components and brushes are not MT30 series The Radio Energie tacho was introduced to this motor series in August 2001 The Radio Energie tacho is not interchangeable with the SEM unit however the SEM unit will be made available for spares requirements for some time to come MTS30 series The
17. l particles have been attracted to any magnetised parts Important When pressing on bearings pressure must only be applied to the inner race ring To reassemble motors using existing armature ensure that all markings made under note 1 are in line Note that the wave washers are at the drive end in all motors manufactured after May 1984 Ensure before assembly that the tacho armature drive pin 33 has been refitted to the main armature shaft Bridgeport motors without locked commutator bearings must have the drive end bearing bonded into the drive end cover When refitting pre May 1984 tachos i e no circlip or shims the armature is put on to the shaft without the set screws being tightened The tacho brush gear is then fitted and the tacho armature is set along the shaft until the brushes are approximately 0 25mm from the front edge of the commutator The two set screws should then be tightened ensuring that the screw marked by a file mark or red point on the sleeve is tightened first In the event of the main armature being renewed the neutral setting of the machine must be checked This is carried out by applying a known DC voltage to terminals or leads A1 and A2 say 50 or 60 volts and checking that the same speed is obtained in both directions for the same applied voltage To increase speed loosen the four Nyloc nuts in the drive end cover and move the motor body in the direction of rotation relative to the commutator end cover To de
18. mbly 12 for re assembly that the brushes are making contact with the commutator Clamp drive shaft in mole grips or a bench vice shaft must be suitably protected against any damage during this operation After test fit new Oilseal Encoders Adaptors when fitted and and remove tacho retaining nut and washer special tool is Cast cover refitting O rings required available from SEM LTD on request Remove tacho I brush gear assembly taking care to remove tacho brushes out of Check insulation resistance to earth with a S00 Volt DC megger the holders as they are not independently retained Remove tacho meter the minimum resistance acceptable is 3 mega ohms for armature tacho body and spacer sleeve and store in a safe the following place Unclamp drive shaft I zed fuer 3 Remove fixing nuts and washers 22 from drive end cover see note for motors fitted with a brake and remove drive end cover and motor body assembly Using a suitable fixture press out motor armature Care must be taken not to damage the threaded shaft end Remove circlip holding comm end bearing so that bearing can be replaced during reassembly Remove oilseal from drive end cover and discard oilseal must be replaced after motor is reassembled Note To dismantle brake motors it is necessary after removing fixing nuts in drive end cover to separate the drive end cover from body assembly by approx 25mm 1 and disconnect the joints in the brake leads Using a s
19. nd any faults identified Spiking or mushiness could indicate that the commutator requires cleaning Open circuits will show as a very large irregular pulse with a break in the continuity of trace while short circuits will show large spiking pulses Run motor at maximum speed see nameplate to ensure that spiking does not occur in either direction If this does occur clean tacho commutator Ensure that the tacho brushgear is secure Check insulation resistance to earth with a 500V DC megger meter The minimum resistance acceptable is 3MQ for the following Motor Armature Tacho Armature Thermal Overload At the same time check that overload is closed Refit steel cover and dowel pins Seal bearing locking cap screws and dowel pin with sealant fit oilseal if required SEM Limited Faraday Way Orpington Kent BR5 3QT England Telephone 44 0 1689 884700 Fax 44 0 1689 884884 Internet http www sem co uk SMAJOS deo Buoo1 Buue g pug ng JeySeD seg xog puluu seg xog euluu duis Buixi4 35olg Ieuluu l JOYSCS 3 eld 1SA0ilg SMOIOS Bulxi4 1899 ysn g ouop deo Bulyoo7 6Buue g peo i AO ewy reuondo ye1g Ieuondo Ie sllO ysn g Oude SMAIOS Bulxi4 Apog oyoeL Uld 8AUq Oye SMOIODS BHulxi4 xog euluu pnis Buixid 1 ploH ysn g M 19 Bulxi4 1 p oH ysn g Uld 8AUG 1 po5Sug MOJOS yeg Ssiq 9 deo JEepjOH usnig H su ysn g 100 yoojg Ieuluu INN pn1S Bulxid JOSEH Pl xog Ieuluu
20. put volts x 0 01 The height reading with the scope closed down includes all irregularities such as modulation and spikes By opening up the time base to say 5 milliseconds the actual shape of the output can be studied and any faults identified Spiking or mushiness could indicate that the commutator requires cleaning Open circuits will show as a very large irregular pulse with a break in the continuity of trace whilst short circuits will show as very large spiking pulses Run motor at maximum speed see nameplate to ensure that spiking does not occur in either direction If this does occur clean tacho commutator Ensure that the brush gear is secured Check insulation resistance to earth with a 500 Volt DC Megger meter The minimum resistance acceptable is 3 MQ for the following Motor Armature Tacho Armature Thermal overload At the same time check that the thermal overload is closed SEM Limited Faraday Way Orpington Kent BR5 3QT England Telephone 44 0 1689 884700 Fax 44 0 1689 884884 E mail info sem co uk Internet http www sem co uk Buly O sM m 199 Bulxi4 1299 ysn g Jolej gu B5ouop I peono ewy reuondo ye1g Ieuondo je s O usnug 10 13Uue Hoye M 19S BHulxi4 Apog 1olejgu BouoSse uld qd 1o ejJ u BouoSp M 19 Bulxid xog euluu pnis Buixid 1 p oH usnug M 19 Bulxid 1 p oH usnig uld Auq 19poo5Sug N 15S yeg osiq 9 deo JEpjOH usnig H su ysnig 10
21. speed see nameplate to ensure that spiking does not occur in either direction If this does occur clean tacho commutator Ensure that the brush gear is secured Check insulation resistance to earth with a 500 Volt DC Megger meter The minimum resistance acceptable is 3 MQ for the following Motor Armature Tacho Armature Thermal overload At the same time check that the thermal overload is closed SEM Limited Faraday Way Orpington Kent BR5 3QT England Telephone 44 0 1689 884700 Fax 44 0 1689 884884 E mail info sem co uk Internet http www sem co uk SMOIDS Bulxi4 1299 ysn g Jo e gu B5ouoep I Jourejay Buup g I uSPAA peono ewy reuondo ye1g Ieuondo je s O ysn g Aolei u 6Bouoe N 105S Hulxi4 Apog 1olejgu B5ouoSe l uld BANG 10O ejJ 9u BouoSp M 19 Bulxid xog euluu pn1S Buixiq 1 p oH usnug M 19 Bulxid 1 p oH usnig uld AuGq 19po5ug N 15S uueg osiq 9 deo JEpjOH usnig H su ysn g 100W yoolg Ieuluu J YSEM S90 e8S InN PNIS Bulxij JOSEE Pl xog euru Pr xog Ieuluu ysep xog puluu xog euluu ejd 13409 JOYSED ejd 19409 Ajqw ssy sear usnig soyesoUsHoOYoR M 19 Bulurejey sunyeuuy Ouop Ajquiassy nyewy JoyesoUusGHoyoe Ajquassy Apog Joresauebouoe Ajquiassy 19409 pug JoyeyNWWoyD Ajquiassy Apog UOITED07 13409 Q q jamoq Buuds 1 AOO pug eAuq JOUSEM ALM pug JOJEINWWOD dijo pug Jol e nuiuuoo Buue g dijo 1ol
22. the commutator housing must be marked to retain relationship for reassembly Again use scribe or marker pen Now remove the 2 4mm screws and washers 40 from the tacho brush gear and take out brush gear complete On earlier model motors the tacho brush gear and tacho body were secured by two protruding studs with nuts and washers clumping the two parts to the commutator end cover 4 Unscrew the two tacho sleeve set screws 14 located just in front of the commutator and remove tacho armature To assist with the removal of the tacho armature leverage can be applied behind the set screws or directly into the tapped sleeve holes with set screws removed ensuring that either the set screws have been removed completely or have been slackened off sufficiently to clear the groove in the shaft 5 Remove the oil seal when fitted from the drive end cover The oil seal must always be replaced with a new one when re assembling Remove circlip and shim washers used to lock drive end bearing axially on the shaft Remove 4 6mm Nyloc nuts 22 from the counterbored holes in the drive end cover 6 Using a rubber or hide mallet separate commutator end housing 11 from the motor body assembly 10 and remove commutator end housing See note 7 for brake motors Separate and remove body assembly 10 from drive end cover 8 The drive end cover is pinned to the body assembly using roll pins Take care Press or tap off drive end cov
23. the non drive bearing housing With a suitable stand to support the body and armature assembly in a horizontal position using a rubber or hide mallet ease the drive end cover off the locating pins 9 Relocate the motor in the vertical position and remove body assembly care to be taken not to trap hands or fingers when removing body assembly due to the magnetic pull between components Supporting armature in a horizontal position a On non brake motors remove the three screws 41 holding the inside end cap 39 and remove the drive end cover Remove circlip 3 and remove bearings b On brake motors remove the six screws holding the brake 37 to the drive end covers and disconnect the brake leads and remove the drive end cover RE ASSEMBLY OF MOTORS 8 SEM Bearings and oilseals when fitted must be replaced whilst brushes can be examined for wear and replaced if required Care to be taken that no metal particles have been attracted to any magnetised parts IMPORTANT When pressing on bearings pressure must only be applied to the inner race ring a With the bearing locking cap 89 in position at the drive end press bearings onto armature shaft Refit circlip 8 and tacho drive pin 33 E mail info sem co uk q motor technology 10 Assemble drive end cover 8 to armature lining up locking cap holes wish drive end cover holes by using a short stud and refit the three screws 45 Stand the assem
24. uitable fixture press out motor armature from comm end cover take care not to damage the threaded shaft end and remove motor body The drive end cover and brake assembly can now be removed The brake must be removed from drive end cover to change the drive end bearing RE ASSEMBLY OF MOTOR 4 Bearings and oilseal must be replaced Examine brushes for wear and refit or replace if necessary Care must be taken that no metal particles have been attracted to any magnetised parts 5 a When using existing armature ensure that all markings are in SEM line during assembly Fit bearing and circlip to commutator end cover press drive end bearing onto armature and using a suitable fixture press comm end cover onto armature Re fit body assembly and drive end cover refitting wave washer at the drive end Refit the O rings between body assembly and both covers At motor technology SEM Limited Faraday Way Orpington Kent BR5 3QT England Telephone 44 0 1689 884700 Fax 44 0 1689 884884 E mail info sem co uk Internet http ww sem co uk peseyoind aq o sey yun 1 9 duio2 sayeds 104 J9P OH usnug SHUIY O Gv a0e4 Bune suy O rtr Ieuondo 10 depy 13p09u4 Er Suoldo sm 199 BHulxi4 10 depy 1 p09U3 zr SM 19 19409 1SPO Lv pu soyeyNWWOd deo saurejey Buue g 68 reuondo eyxe1g LE E9s lIO 9E usniq Oye SE oyog A89 S Je0edS es pnis bux LE JOplOH usniq 08 N 105S Bulxij 1 p oH ysn g 62 Ieuondo
Download Pdf Manuals
Related Search