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    CNC LATHELB25IIOPERATION & MAINTENANCE MANUAL(1th Edition)Pub. No. 3790-E(LE11-061-R1) March 1994LOKUMA

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    SAFETY PRECAUTIONSThank you for your purchasing theLB25II. The machine isequipped with a variety of safetydevicesdesigned topreventaccidents and injuries from occurring. Still, operators mustuse themachine carefullyandlearn not to relyon thesesafety devices.This section describes thegeneral safet...

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    3.GENERAL CHECKS(1) Check the amountof lubricating oil every daybefore startingoperation.(2) Always use the specifiedbrand of lubricating oil.(3) Use the recommended type ofcutting fluid (coolant) when possible.(4) Change and replenish thelubricating oil andcoolant ineach reservoir according toth...

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    4.BEFORESTARTING OPERATION(1)Always follow theinstructions inthe operation manual.(2) Never operate the machine with allof the protectivecovers and shields in place.(3)Always close the frontshield before starting operation.(4)Never attempt to run a newprogram without checking its operation.Run th...

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    5.SETUP(1) Makesure that setup iscomplete.(2) If the setup is changed, operate the machinestep-by-step tomakesure that cutting canperformedwithout any problems.(3) Before changing the chuckand/or chuckjaws, makesure that thechuck fits theintendedjog.(4) If twoormore workers must work together, es...

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    8.WHENA PROBLEM OCCURS(1) Stop the machine immediately by pressing the EMERGENCY STOP switchon the operation panel.(2) Consult with theperson in charge ofmaintenance todetermine what correctivemeasures need tobe taken.(3) If two or more workers mustwork together, establish signalsso that theycan ...

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    10.SAFETYDEVICES ANDFUNCTIONSContentsLocationRemark1. Front shieldwith grated glass andpolycarbonate2.Shield open/close interlock3.Chuck interlock4. Tailstock spindle interlock5.Tailstock spindle positionconfirmation6.Foot pedalprotection cover7. Emergencylimit setting LS (limitswitch) (X-ZZ-axis...

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    11.SYMBOLSThismanual usesthe following symbols toemphasizethe items which mustbe strictly observed:mREMARKS Precautionin machine operations.Default ofthis item affects the machining accuracy andsmooth operation.© CAUTIONDefault ofthis item maycause faultymachine operation, machinedamage,oroperat...

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    5.Never attempt toinstall jigs using T-nut.Besure tofix the jigs withbolts.No chucks prepared byOkuma have T-groove.T-stotJiflVWK>'JawX6.When inserting abar material into the hollowchuck, ensurethatthe bar does notprotrude from therear end ofthecylinder.Hollow chuckCylinderXChuck7.Neveruse dou...

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    INTRODUCTIONThank you forchoosing an Okuma Model LB25II CNC lathe. We are proud tohave you among our Okumafamily ofusers.This instruction manual contains concise information on the installation, setup,operation andmaintenanceofyour Model LB25II CNC lathe. To make the mostofits outstandingperforma...

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    p-(i)TABLE OFCONTENTSTABLE OFCONTENTSPAGE1SECTION 1 MACHINESPECIFICATIONS11.SPECIFICATION TABLE32.DIMENSIONAL DRAWINGSSECTION 2HANDLING AND INSTALLATION OF MACHINE51. CARE IN HANDLING A PRECISIONMACHINE1-1.Machine Lifting.1-2.Precautions for Lifting1-3.Rolling.2.FOUNDATION REQUIREMENTS2-1.General...

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    P-(ii)TABLE OF CONTENTSPAGESECTION 4INSPECTIONAND MAINTENANCEOFMACHINE471.LUBRICATION1-1.Spindle1-2.Slideway Lubrication System2.ADJUSTING CENTRALIZED LUBRICATIONUNIT485252533.CLEANING COOLANT TANK544.TENSIONINGBELTS4-1.SpindleDrive Belts5.OTHERMAINTENANCE ITEMS5-1.Check the Bed Level5-2.Alignmen...

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    p-(iii)TABLE OF CONTENTSPAGESECTION 7TOUCH SETTER M (OPTIONAL)881. OVERVIEW OF TOUCHSETTER882.CAUTIONS ONHANDLING THE TOUCHSETTER893.RE-ADJUSTINGTHE SENSOR914.SPARE PARTS92

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    3790-E P-1SECTION 1MACHINE SPECIFICATIONSECTION 1MACHINE SPECIFICATIONS1. SPECIFICATION TABLESpecificationsItemUnitLB25II-T420 x 300LB25II-C420 x 650LB25II-C420 x 1250CAPACITY:Swingover bedmm (in.)4>620 (24.41)Swing over carriagemm (in.)4>420 (16.54)675 (26.57)|1275 (50.20)Distance between ...

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    3790-E P-2SECTION 1MACHINESPECIFICATIONSpecificationsItemUnitLB25II-T420 x 300LB25II-C420 x 650LB25II-C420 x 1250MACHINE HEIGHTmm (in.)1865 (73.43))2043 (80.43)FLOOR SPACE REQUIREDmm (in.) xmm (in.)3400 x 1950 (133.86 x 76.77)4000 x 1880(157.48 x 74.02)NET WEIGHT(including CNC unit)kg(lb)6200(136...

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    ro900 (35 43)Power cable inlet\1680 (66.14) from FL€=» /---V oHydraulic unit2/58CO\CDCDm/cnaO Q)roSi?cnfU33(/)VinoIP3 ®crroroOginONC unit:5Xoig-co roEpit!trtrf-LrCD>cTcnsrror=ET735'COcnooCMin|§:roLi2o>31GO"!83roVywti>CO«pro5gOC.Chuckopen/closefTfootswitchLi=::=..J£ Spindle®d...

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    Power cableInletM680 (66.14) fromFLh3Hydraulic unit1CMI. aro «'cn o)o 3DO\:JLrocnnH38 6srCOSLONIC unil3 crX&—* 2L&?mftCDCDro ro-*• 3IV)vmcng.o1CDCDp::=::s:3:£8ksinsfliPn---IUiM...I00/i3ttnCDgjrCD<ProTailslock sleeveadvance/relracllootswilchTChuck open/closenfoolswilchSpindledrive...

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    3790-E P-5SECTION 2 HANDLING AND INSTALLATION OF MACHINESECTION 2HANDLING ANDINSTALLATION OFMACHINEThis section outlines the proceduresfor handling and installing your CNC lathe when it has to bemoved toaplace area due toany change in your plant layout.Most precautions notedmay also apply tothe i...

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    3790-E P-6SECTION 2 HANDLINGAND INSTALLATION OFMACHINEProcedure:a)Move thesaddle and thetailstock totheright end andclamp thetailstock inplace.b)Removethe sidecovers ofthe coolantpump that islocated atthe lower rightside of themachine.c)Disconnect the cables and hosesfrom the coolantpump.d)Pull o...

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    3790-E P-7SECTION 2HANDLINGAND INSTALLATION OFMACHINE1-2.Precautionsfor Lifting©CAUTION(1) The cables should havea nominal diameter of 20mm (0.79 in.) or larger.(2) Change an angleformed by each cable lineso that the cables will not contactthe finishedsurfaces of the machine. (The cablesmay notf...

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    3790-E P-8SECTION 2 HANDLINGAND INSTALLATION OF MACHINEFOUNDATION REQUIREMENTS2.2-1.GeneralPrecautions for Buildinga NewFoundationIn mostplantswhere concretefloors are solid andlevel, your CNClathe may be installed without anchoringittothe floor and thenused satisfactorily if leveled carefully.Fo...

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    3790-E P-9SECTION 2HANDLING ANDINSTALLATION OF MACHINE3.GENERAL PROCEDURE FORINSTALLATION(1) Place leveling plates, 150 x 150 x 19mm (5.91 x 5.91 x 0.75 in.)over individual foundationbolt-holes.Refer tothe Foundation Plan.(2) Place foundationwashers (furnished togetherwith the machine) on the lev...

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    3790-E P-10SECTION 2 HANDLINGAND INSTALLATION OFMACHINE4.LEVELING THE MACHINEThe Machine must be carefully leveledbecause theaccuracy ofthelevel atthe initial installation will greatlyaffect theworkingaccuracy and the servicelife ofthe machine.No. ofLevelingJack ScrewsModelRemarks1ST4)410 x 33011...

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    cnControl boxt300n550300 (11.61)1100(43 31)1090 (46.85)o(21.65)(11.81)rn“Isg 5g rooscn:'H:I!S'5II4S-Iainn13S:0—O>0oII0u-8H2a*I23xs0c105Ss::O?u#2 Si:K(4.13)I3CDS3rrVCM:0C710O&: 5g:-oiSSpfndlo centerd8us:IDCM"D-l2dxy//////,«Tios0——•••—(I-8300 (11.811IDs» 8>f jf—H...

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    ControlbOK300ro050(33.46),535 (21061.(11.61300(11 81)1090(46.85)715(28 15)o"1r“I5TCDWo cnH5*:rolWCJ13as§=—-SI""""“4in incnoam0Bo===*crinv sIsXCDI.sscn5.105 (4.13)JM«i !inninfCininCM0MinCO-=r•cag0cn. aooinX7/////A.3os5TSpindlecomero§r~-sr~-ftin r-o4-4! !RdXW/,7,...

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    3790-E P-13SECTION 2 HANDLING AND INSTALLATION OF MACHINE6.POWER REQUIREMENTSPowersource: 3-phase,200/220 V,50/60 Hz|Main motor:VAC 15/11 kW (20/15 hp)1 125A min.?ÿIruIAElectrical control boxI5Automatic circuit breakerI(Fusing capacity:75 Amin.)jJI--1_I/'---1I©ICable sizeGround[38mm2 (0.059in.2...

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    3790-E P-14SECTION 3MACHINE OPERATIONSECTION 3MACHINEOPERATION1.BEFORESTARTING OPERATIONSThis section deals mainly with the operating procedures of yourCNC lathe under manualcontrol. Sotheinformation givenhere is essential to every operator,whetheryou are new toaCNC latheor an “oldpro”.Follow...

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    3790-E P-15SECTION 3MACHINE OPERATION2.MACHINEOPERATION2-1. Hydraulic UnitPressuregaugeVariable deliverypumpIVSystem pressureadjusting valve£Oil filterJ\portOil levelgaugeReturn filter,/Suction filterDrain poiFig. 3-1 Hydraulic Unit(1) Pressure IndicationPressure setting forthehydraulic unitshou...

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    3790-E P-16SECTION 3MACHINE OPERATION(2) Adjustment of HydraulicPressureThe following outlines the methods ofsettingindividual functionalunits foroperatingpressure. Sincethe pressure lines for the turret(s) havebeen adjusted atour factory beforeshipment, theywill notrequire readjustments, duringt...

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    3790-E P-17SECTION 3MACHINE OPERATION(3)Hydraulic OilOil SpecificationHL32(MAS)Amount40liter (10,6 gal)Oil Change IntervalChange after first month ofoperationand every6months thereafter.REMARKS:Clean thesuction filter,the line filter, and the tank whenchanging theoil. Check thepressure for respec...

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    3790-E P-18SECTION 3MACHINE OPERATION2-2.Selection of Spindle Speed(1) Spindle Power Transmission Torque Diagram- 3500min-1 {rpm>N-m(kgf-m}kW-2015 kW {20hp} (30min rating)/11 kW {15 hp} (cont. rating)E 1000(100}700 {70}S,500(50}.£400 {40} *-10‘B)§614.5 N •m (62.7 kgf •m (453.5 Ibfft)}_...

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    3790-E P-19SECTION 3MACHINE OPERATION2-3.Hydraulic Chuck(1) ConstructionThe construction of hydraulicchuck is shown below.Jaw nutTop jawTop jawJaw nutMaster jawDraw tubeConnectingChuck bodyrodNut3=vKDraw screw A /Draw tubePilot bushing\ Top jawMountingbolt BWedge plungerCHUCKoperating pedalMounti...

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    3790-E P-20SECTION 3MACHINE OPERATION(3) Chuck Grip ConfirmationToensure your safetyin using the chuck grip confirmation unit, read the following information carefullytounderstand the function andconstruction ofthe unit and observe the instructions.a)SolidchuckcylinderHydraulic rotarycylinder(wit...

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    3790-E P-21SECTION 3MACHINEOPERATIONb)Hollow chuck cylinderHydraulic chuckHydraulic rotary cylinderDraw tubefrirl\T-n Jl'g JProximityswitchesAdjustingscrewVW'V/Dog.HTFig. 3-7Hollow Chuck CylinderPosition of the dog moving with the hydraulic rotarycylinder pistonis detected by the proximityswitche...

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    3790-EP-22SECTION 3MACHINE OPERATION(4) Adjustment of OilPressure forHydraulic ChuckThe gripping pressure ofthe chuck jaws isdependentupon theworkingpressure of hydraulic fluid whichisdetermined by the setting ofthechuck pressure adjusting valve installed atthe front ofthe machine(See 2-1.).A clo...

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    3790-E P-23SECTION 3MACHINE OPERATION(7) Adjusting ProximitySwitch Longitudinal Position (optional)a)Forsolid cylinderLoosen thescrews clamping the two proximityswitch plates toslide them with the proximity switchtodetermine the position. After determiningthe position, tighten the proximity switc...

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    3790-E P-24SECTION 3MACHINE OPERATIONb)For hollow cylinderLoosen thescrews clamping the twoproximity switchplates toslidethem with theproximity switchtodetermine the position. Afterdetermining theposition, tighten the proximityswitch plate clampscrews.Proximity switch plate clamping screwSlide(2s...

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    3790-EP-25SECTION 3MACHINE OPERATION(8) SettingProximity Switchesa)OD chuckingSet theproximity switches atthe positionsas indicated below:(B)JLWProximity switch(A): Piston advance endProximity switch(B): Chuck gripping position3_n;—nr4JChuck sideuPiston advance end (jawopen end)Chuck gripping p...

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    3790-EP-26SECTION 3 MACHINE OPERATION(9) Confirmation Signalsa)Signal input status displayWhetheror notthe proximityswitchesare setcorrectly and corresponding signalsare inputcan bechecked by the check datadisplay screen.For the procedure to displaytheCHECK DATA screen, refer toOperationManual fo...

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    3790-E P-27SECTION 3MACHINE OPERATIONc)Operation completion confirmation delay timerTheremay becases in which thechuck open/close is notcompleted evenif the correspondingsignal is input. For such cases, timer function can be used to delay the confirmation ofthe chuckoperation after theinput ofthe...

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    3790-E P-28SECTION 3MACHINE OPERATION(10) Hydraulic Chuck Clamping Force Characteristics Diagrama)For solid chuckICOz1/IS £1lOCOTTsSI5 5- s §II|sl oIIrZwg)17<IoZ1D./1sA§osiiinoClamping ForceNFig. 3-14Chuck Speed- Clamping Force Diagram (For Solid Chuck)

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    3790-EP-29SECTION 3MACHINE OPERATIONb)For Hollow ChuckOLOCOog7CMzE£1zCMCM<FtO3/'SoCO CMCM’£2*o co8ICMm cosE<<5£U)20=jls.o2oaoCOCOg)§oaoooooooo1 Sspocr*oocogoCDS!*“ClampingForce NFig. 3-15Chuck Speed- Clamping ForceDiagram (For Hollow Chuck)

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    3790-E P-30SECTION 3MACHINE OPERATION(11) GeneralPrecaution for UsingPower ChucksIn order toinsure maximumsafety in operation, the followingpointscall for your specialnotice:a)Selectthe rightchuck that matches themachine’s capacity.b)Workpiecesshould be clampedin the chuck without imbalance. Se...

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    3790-E P-31SECTION 3MACHINE OPERATION2-4.Cutting Soft Top Jawsof PowerChuckThereare threedifferentmethods appliedin cutting soft top jaws of chuck jaws for chucking a particularlot ofparts.- by pulse feed handwheel- by tape- by manual data input (MDI)Theyare allbasically thesame operations, andit...

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    3790-E P-32SECTION 3MACHINE OPERATION(1) Procedurea)Gripa ring ofproper diameterin the chuck.cj)50mm (2 in.)ring forinstanceb)Locate the tooltip point atpoint A and setthezero offset valueso thatthe actual position ofX-axis is equivalent tothe ring diameter; 50mm (2 in.) in thiscase.Actual positi...

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    3790-E P-33SECTION3MACHINE OPERATION2-5.Hydraulic Tailstock Operation(1)Tailstock Position Setting (Whenmoved manually)Move the turret totheX-axisplus limitposition.Tailstock body joint pinSaddleuuu1LirU2Tailstock bodytowing blockFig. 3-17Tailstock Position SettingMovethe saddle toalignthe center...

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    3790-E P-34SECTION 3MACHINE OPERATION(3) Center-work/Chuck-work Selector SwitchThe tailstock setup (for center-work tailstock is used, forchuck-work tailstock is not used.) conditionshould be set tothecorresponding parameter.Center-work:The tailstock sleeve operation(advance/retract) is controlle...

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    3790-E P-35SECTION 3 MACHINE OPERATION2-6.Cautions on Operating theTurret©CAUTIONWhen indexing the turret,retractit toa position where rotating ofthe turret does notcauseinterference between the toolsin the turret and the workpieceor chuck.For 0.5seconds after thecompletion of turret indexing, t...

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    3790-E P-36SECTION 3MACHINE OPERATION2-7.InterlockmREMARKS :The doorinterlock function isprovided toensure operator’s safety.When an attempt is made tostartthespindle,index the turretor feedanaxis whilethe frontdoor isopen bymore than 140mm (5.51 in.),an alarm occurs to stop themachine.If neces...

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    3790-E P-37SECTION 3MACHINE OPERATIONStatus Display of ECInput Signal (No. 1)Check columnData codeAUTO . OP E R ATI 0 M o.niM00801m1CHECK DATAA turretzc ir-pur ei:dat*11101111COS0G01Iieeeo9iooeezeonneeeuoiOieceesncim:UilT liBTOb 117 bitS bltS bii4 blt3bltZ bitl bitdTCLA CPfV CPA/OFfl TLPC TLA3TLA...

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    3790-E P-38SECTION 3MACHINE OPERATIONStatus Display of EC Input Signal (No. 2)AUTOOPERATION fl.MIN00001 N11OCCX DATAA turretEC iffvree.-d«t«010300010000600000000000eoeeeeoDnsTi MDCIO0000920ceooeecoMSTZnoczeeaaooco0000100000100100ooeeoecoccooaooauirr u«bit?bU6bltS blt4blt3 bltZ bltl blt0TSLC TS...

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    3790-E P-39SECTION 3MACHINE OPERATION2-9.Manually OperatedChuckFour-JawIndependent Chuck (Kitagawa)(1) InspectionCheck themodelname indicatedon the chuck body,possible damages duringtransportation, andaccessories.(2) StandardsThe four-jaw independent chucks(Kitagawa) are manufactured in strict ad...

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    3790-E P-40SECTION 3MACHINE OPERATION1C TypeUnit:mm (in.)TypeMaximum Chucking DiameterBoltsRun-out ofChuck BodyCircumference and FrontFaceAdaptorInstallationSection DimensionsNo. of boltsx Bolt SizeinchID ChuckingOD ChuckingP.C.D.mm44-M810040(1.57)90 (3.54)Within 0.030(0.00118)75+0.030(0.00118)86...

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    3790-E P-41SECTION 3 MACHINE OPERATIONIA TypeUnit:mm (in.)Minimum ChuckingDiameterSpindleNoseRun-out of Chuck Body Circumference andFront FaceTypeID ChuckingOPChucking75 ( 2.95)185(7.28)Within 0.030 (0.00118)IA5-200A-595 ( 3.74)220 ( 8.66)IA5-250125 (4.92)265 (10.43)IA5-30075 (2.95)185(7.28)IA6-2...

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    3790-E P-42SECTION 3MACHINE OPERATION(3) Installing Chucka)Accuracyof adaptor installation sectionhas direct influence totheworkpiece chuckingaccuracy. Therefore,machine theadaptor very carefully.Requiredaccuracy is within 0.005mm (0.00020 in.) for run-out on circumference, face run-out,and flatn...

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    3790-E P-43SECTION 3MACHINE OPERATION(4) Lubrication and CleaningToensure high accuracy fora long period, clean the fittingportionsbetween the chuckbody and thechuck jaws, and between thechuck jaw serration andascrew. For the cleaning,remove the jaws.Supply oilonce or twicea day.(5) Maximum Speed...

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    3790-E P-44SECTION 3MACHINE OPERATIONChuck Specifications- Flat BackType ChuckGripping ForceMaximum GrippingForceChuckHandleTorqueN-m{kgf-m (lbf-ft)}Inertia(GD2)N-m2(kgf.m2)AllowableMax.Speedmin'1 {rpm}GrippingForce/JawkN {kgf (Ibf)}IDODTypeWeightkg (lb)Chuckingmm (in.)Chuckingmm (in.)IC-434.04.9...

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    3790-EP-45SECTION 3MACHINE OPERATIONChuck Specifications- Type A Short TaperChuckGripping ForceMaximumGrip ping ForceChuckHandleTorqueMax.Inertia(GD2)N-m2(kgf-m2)SpindleNoseGrippingForce/JawkN {kgf (Ibf)}AllowableSpeedmin-1(rpm)TypeODChuckingmm (in.)ID Chuckingmm (in.)Weightkg (lb)Nm{kgf-m(lbf-ft...

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    3790-EP-46SECTION 3 MACHINE OPERATIONGripping ForceMaximum Grip pingForceChuckHandleTorqueMax.AllowableSpeedmin'1(rpm)Inertia(GD2)N-m2(kgf-m2)SpindleNoseGrippingForce/JawkN {kgf (Ibf)}TypeID Chuckingmm (in.)ODChuckingmm (in.)Weightkg (lb)Nm{kgf-m(lbf-ft)}A2-15IA15-61044126.5280520215900394{45 (32...

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    3790-E P-47SECTION 4INSPECTIONAND MAINTENANCE OF MACHINESECTION 4INSPECTIONAND MAINTENANCE OFMACHINEYour CNC lathe isa highly efficient productionmachine calling fora much higher utilization ratethan anenginelathe.This section dealswith themaintenance requirements which mustbe met by everyuser in...

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    3790-E P-48SECTION 4INSPECTION AND MAINTENANCE OFMACHINE1.LUBRICATIONThemachineshould be completelyand correctlylubricated in strict adherence tothe directionsin theLubricationChart in the following page.(1) Alwaysuse the specified lubricating oil.a)If the oil other than specified is used, the lu...

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    3790-E P-49SECTION 4 INSPECTION AND MAINTENANCE OF MACHINELubrication Chart (Distance betweenCenters: 650mm (25.59 in.))(5)3rOptionalH-LJHydraulic line filter(4):Coolant tank filtertig*-'CNC unit(5)!OptionalJ\w-jr-r—THr8EHj.ILZ„._JLI——J(2)(1)(3)Fig. 4-1Lubrication ChartNo.Oiling PointsQua...

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    3790-E P-50SECTION 4 INSPECTION AND MAINTENANCE OF MACHINELubricationChart (DistancebetweenCenters: 1250mm (49.21 in.))Hydraulic linefiller(4)(5)/«mmOptionalCNCunitH.rh:tuhr —iig_jii 1 1: ;: :Vw.(2)(1)(3)Fig. 4-2Lubrication ChartNo.Oiling PointsQuantityOil Used(MAS)Remarks1Chuck jawAs neededMo...

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    3790-EP-51SECTION 4INSPECTION AND MAINTENANCE OFMACHINETable 4-1 LubricatingOil SpecificationApplicationCodeEssoShellMobilHeadstock gearbox(Spindle gearboxwith C-axis)Separately installed gearboxCB32Tetra Oil 32DTE Oil Light*Unipower 32Cam typeturretCC320Spartan EP320*Omala Oil 320Gear Oil 632Spi...

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    3790-E P-52SECTION 4INSPECTION AND MAINTENANCE OFMACHINE1-1.SpindleAll thespindlebearings arelubricated bypacked high qualitygrease, requiring no furthergreasing.1-2.Slideway Lubrication SystemOilfillerportrrOil levelgaugeFig. 4-2Slideway Lubrication SystemOilSpecificationG68 (MAS)Amount4.0liter ...

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    3790-E P-53SECTION 4INSPECTION AND MAINTENANCE OFMACHINE2.ADJUSTING CENTRALIZED LUBRICATION UNIT(1) AdjustingPump DeliveryThedelivery amount toeach lubrication pointis controlled by themetering typedistribution valve, andno further adjustment is necessary.A metering typedistribution valve is prov...

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    3790-EP-54SECTION 4INSPECTION AND MAINTENANCE OF MACHINE3.CLEANING COOLANT TANKFront railrtn/TOCoolantpumpCatChip conveyoror chip pantiiffis-IfIiu__ J/\ FitterSeparately installedcoolant tankFig. 4-4Cleaning Coolant Tank(1) Procedure toClean theSeparately Installed Coolant Tanka)Remove thefrontco...

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    3790-E P-55SECTION 4INSPECTION AND MAINTENANCE OFMACHINE4.TENSIONINGBELTS4-1. SpindleDrive BeltsHeadstockinput pulleyMotor pulleyMain drivemotorMotor baseMotor baseBolt ATension adjustingboltTension adjustingboltFig. 4-5 Spindle Drive Belts(1) AdjustingBelt Tension by UsingA TensionMeter (Optiona...

  • Page 69

    3790-E P-56SECTION 4INSPECTION AND MAINTENANCE OFMACHINE(2)How toUse Tension MeterThis indicates belt deflection amount.This indicates belttension.i-HmliltmlMNTIFig. 4-7 Belt Tension Meter (optional)Provide deflection5 atthe centerof thebelt span and read the tension load “P.When installinga ne...

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    3790-E P-57SECTION 4INSPECTION AND MAINTENANCE OF MACHINE5.OTHERMAINTENANCE ITEMS5-1. Check theBed LevelThe straightnessor level ofthe bedways will affectthemachiningaccuracy. In case parts cannotbeturnedto specified tolerances,firstcheck andsecure themachine level, thenproceed with necessary adj...

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    3790-EP-58SECTION 4INSPECTION AND MAINTENANCE OFMACHINE5-3.Adjustment ofTapered Gibson Saddle Cross-slideThe machine is shipped after complete adjustment of tapered gibs. Readjustmentwill become necessarywhen the gibs are wornor loosenedby use, resultingin noticeable irregularfeed movement,which ...

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    3790-E P-59SECTION 4INSPECTIONAND MAINTENANCE OFMACHINE6.TROUBLESHOOTING FORSIMPLE MECHANICAL TROUBLE6-1. Trouble with Headstock(1) NoSpindle RotationIs the power chuck closed?For model withtailstock:CENTERWORK/CHUCK WORK selectorsetting:CENTER WORK...Tailstock sleeve must be atthe advance end.CH...

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    3790-E P-60SECTION 4INSPECTION AND MAINTENANCE OFMACHINE(2)WeakTurret Clamping PressureIs the oilpressure set tothe required level?NOAdjust the system pressure.(See Section 3, 2-1. (2).)(3) After Collision ofTurreta)Checking after turretcollisionMisalignment ofthe turretor the headstock mightbe c...

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    3790-E P-61SECTION 4INSPECTION AND MAINTENANCE OFMACHINE2)Accuracyinspection ofheadstockFinisha testpieceindicated in Fig. 4-11 belowin theMDI mode operation tocheck thecylindricity.If the measuredcyiindricity islarger than 0.015mm/225mm (0.0006 in./8.86 in.),adjustment ofthe headstock isnecessar...

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    3790-E P-62SECTION 4INSPECTION AND MAINTENANCE OFMACHINEb)Correcting turret inclinationIf the turret inclination amountmeasuredas per Fig. 4-9is larger than 0.02 mm (0.0008 in.),adjustmentshould bemadein themanner indicated below (Refer to Fig. 4-12.):1)Removecovers (1), (2) and (7).2)Loosen the ...

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    3790-E P-63SECTION 4INSPECTION AND MAINTENANCE OFMACHINEc)Correcting turretoffsetIf theoffset amountmeasured as per Fig. 4-10is largerthan 0.05mm (0.002 in.), make correctionsfollowing the stepsbelow: (Refer toFig. 4-13.)1)Press theCONTROL OFF pushbuttonswitch to turnoff thepower supply totheNC a...

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    3790-E P-64SECTION 4INSPECTION AND MAINTENANCE OF MACHINE21) Reassemble the turrethead inreverse order of steps 9) to 15).Besure that allO-rings have beenplaced in position.Apply grease to the clutch teeth slightly.22) Turnon power.23) Set “0” atthe optional parameterNo. 40, bit 1.24) Inthe m...

  • Page 78

    3790-EP-65SECTION 4 INSPECTION AND MAINTENANCE OFMACHINE6-3.Trouble with X-axis Ball Screw(1)StructureBallscrew nut (13)Screw.(5)Turret (12)Ballscrew (14)Bracket (19)Screw (7),Brake (27)!!BL motor (26)Bracket(17)Nut (23)Cover (1)Cover (4)::rfrituJ 7 77 tfjj-g jLif5::17Screw (3)TAC7bearing [16Nut ...

  • Page 79

    3790-E P-66SECTION 4INSPECTION AND MAINTENANCE OFMACHINEd)Procedure toadjustpretensionTo protect theX-axis ballscrew fromthermal expansion causedbya temperature rise ofapprox.3°C, theX-axis ball screw is pre-tensedby 415 kg (913 lb).Whenever the TAC bearingor the ballscrew has been replaced, per...

  • Page 80

    3790-EP-67SECTION 4INSPECTION AND MAINTENANCE OFMACHINE(3) No Pressure Building-up ofHydraulicPower UnitThe hydraulic power unitpump motor is operating.YESCheck if the overload relay OL1Cistripped.NOThe filteris clogged.Clean the filter.See Section 3,2-1.NOThe hydraulic oilin the tank is filled t...

  • Page 81

    3790-EP-68SECTION 5SPARE PARTS LISTSECTION 5SPARE PARTS LIST1.HYDRAULICSNo.Part NameOkumaPartNo.MakerTypeDimensionQ’tyUsePumpUVC-1A-A3-22-4-1914J1NachiHydraulic unitF0100-73-000-1212Return filter1Hydraulic unitAT-PT1/4 x $60x 100K, filledwithglycerine3Pressure gaugeTomita1HydraulicunitT019-400-...

  • Page 82

    3790-E P-69SECTION 5SPARE PARTS LIST2.ELECTRICALS (ON MACHINE)No.Part NameMakerTypeDimensionQ'tyUseOkumaPart No.Coolantpump1HitachiHP-025250 WCoolant1F0130-03-000-71-22LubricationpumpShowaLCB4210B1SlidewaylubricationH0120-0005-11Limit switch3Yamatake1LSI-JX-axislimit1E3012-891-001Limit switch1LSI...

  • Page 83

    3790-E P-70SECTION 5SPARE PARTS LIST3.CONSUMABLE ITEMSNo.TypePart NameMakerDimensionQ’tyUseOkumaPart No.WiperWiper edge1BandoCross-slide(front)1H1023-0020-59-12WiperBandoWiper edgeCross-slide(left rear)H1023-0020-60-11WiperBandoWiperedge31Cross-slide(right rear)H1023-0020-61-14WiperWiperedgeBan...

  • Page 84

    3790-E P-71SECTION 5SPARE PARTS LISTNo.Part NameMakerTypeDimensionQ’tyUseOkumaPart No.NOK30Dust sealDKIFD4046A01TailstockH0031-0002-4531CapsealDainihondensenCAP-1BE-80Tailstock1H0031-0004-14Standard Spindle Specification:No.PartNameMakerTypeDimensionQ’tyUseOkuma PartNo.1BeltBando3V-5604pcs.Ma...

  • Page 85

    3790-EP-72SECTION 6TECHNICAL DATASECTION 6TECHNICAL DATA1.TOOLING SYSTEMFor ID TunningFor OP TunningMT No. 1-H40MT No. 2-H40MTNo. 3-H40Drill SleeveMT No. 4-H40(ft10-H40ODTypeIToolholder@5-4>12-H40IDToolholderBaseBoring Bar Sleeve<j)16-H404>20-H404>25-H40Boring Bar4>32-H40OD TypenTo...

  • Page 86

    3790-E P-73SECTION 6TECHNICAL DATA2.TOOLHOLDER DIMENSIONS(1) OD Type IToolholder4(0.16)20.4 (0.80)mOT----''mofF81 (3.19)25 (0.98) 25 (0.98)102 (4.02)Fig. 6-2Toolholder Dimensions (OD Type I Toolholder)(2) OD Type IIToolholderlRTilF20H7=K>%=trrni(0.98) 25(0.83 13.27)102 (4.02)Fig. 6-3Toolholder...

  • Page 87

    3790-EP-74SECTION 6TECHNICAL DATA(4) Drill Sleeveo§MTDIod'i<DS5S3 1Jid-!=¥=Hi82 (3.23)B38.5(1.52)CUnit: mm (in.)4>ABCDEFMT No. 1-H4012.065 (0.475)5 (0.20)87 (3.42)52 (2.05)19(0.75)5.4(0.21)MTNo. 2-H4017.780 (0.70)10(0.39)92 (3.62)63 (2.48)22 (0.87)6.6 (0.26)MT No. 3-H4023.825(0.94)30(1.18...

  • Page 88

    3790-EP-75SECTION 6TECHNICAL DATA3.TOOL INTERFERENCE DIAGRAM/XIsI1;&ioi% \££Qgl|X>cXm5&Vx"r\!S!!\/Arm1Ven,ÿ\K/\\Is/I!/(A\ij/iTÿfI1JDIiM\/!\WE*IT/\;1—III/ÿI#V7"/i-~v~~7IM\ rx4FI/Ii/|2Unit: mm (in.)olFig. 6-7Tool InterferenceDiagram

  • Page 89

    ©o5305*omo©JCLCD30>Travel 1440(56.69) [DSC: 1250(49.21))Travel 840 (33.07) [DfiC: 650(25/59)]2Travel 1276(50.24) [DBC: 1250 (49.21)]Travel 676 (26.61)[DBC: 650(25.59)]©5 (0.20)159 (6.26)m55J!46(1.81)(2.17) 102(4.02)ga!<p=-CT>>zZCD©%30o/>toTallslock Iravel 120(4.72)5 Z®.mRotati...

  • Page 90

    ToOa<<ÿo12.Travel 1440 (56.69)[DBC: 1250(49.21)1Travel 840(33.07) [DBC: 650(25/59)]E/KIBTravel 1276(50 24)(DBC: 1250(49.21)]Travel 676 (26.61)(DBC: 650(25.59)]CD«P157 (6.18)7 (0.28)55O)coCO46(1.81)102 (4.02)CO8"£os:s/7CO/•|C3/SKS8/SKESCO'fO1Z.DORotation centerNo. 5_/Tailstock trav...

  • Page 91

    sTravel 1440 (56.69) [DBC:1250 (49.21)]Travel 840(33.07) [DBC: 650 (25/59)]OD123(4.84)Travel 1276 (50.23) [DBC: 1250(49.21)1TrSl6 (0.24)£Travel 676 (26.62) [DBC:650 (25.59)]5510246(1.81)2.16) (4.02)CDo;jmOlMSRotation cenlerTallstocktravel 120(4,72)No. 5/&cp7o>o//A7///%/o7T(Q/.i1egCD51186(...

  • Page 92

    3790-E P-79SECTION 6TECHNICAL DATA5.DIMENSION OF SPINDLE NOSE(JIS-A2-8)88bbCDCD\\b8toooCDCD\8CDCO?8CD4)210 (8.28)4)171.45 (6.75)000139.31S-O.1O2l5.50-0.004+0.01Of +0.004]0139.7190l0joCDIn'CNJ64>23.S13(0.938) h8SL5KSf<30LO(ooc.o>CMO5Unit: mm (in.)Fig. 6-11Dimension of SpindleNose (JIS-A2-11)

  • Page 93

    LE11-062-R1 P-80SECTION 6TECHNICALDATA6. HYDRAULICCHUCK ANDCYLINDER(1)For Solid Chuckf1mSIIIffnzTga\zi5g?! Iit9IaI 3IWisITi•5ICOI- =II1fI:5.IS'2EI* 8ISsI I ai£aSIIISICMs 25 8mCM§1S'I 1ssr&111II§4x250(9-25)II S!i p,1II:i*130(5.12)4i < ><1urr5»tII §2!g.iI iiiIIS'=sslIftiiccri1s*...

  • Page 94

    55(2.17)113(4.45)225 (8.86)645 (25.39)134 (5.28)46(1.81),50(1-97)"FoCoverleftsideo4i__M6n§:fo COuicnO£§3a,o3"ro_to-e00-eo:H<P|o- co“ p5O)g5 ISi;M78P2M78P2rr001==ori9-e_M16zLIsTti:\oJ!==,o3"o_IkT-L522-3000-09-1B210A801/14 £Q.o773.5 (30.45)556-3005-01-013.S1870-01CDUnit: mm ...

  • Page 95

    LE11-062-R1 P-82SECTION 6TECHNICAL DATA7.HYDRAULIC CIRCUIT DIAGRAMS'SI 1sIoB)!f LikTl--rtSi1Jl!$.£ Si.E2-Hmn nil~j|T/IM-+>rcI2aL**KTDCLsiDC DCcID CEi€£JWlLi3L£E gI S•>taoC.~-Fig. 6-14Hydraulic Circuit Diagram

  • Page 96

    LE11-062-R1 P-83SECTION 6TECHNICAL DATAUseMakerTypeNo.Part NameShowaOiltank1RadiatorNakamura21013-201-138Suction filterSegaSH-06 150 mesh3Uni-pumpUVC-1A-A3-2.2-4-1914J4NachiThrottle valveClampspeed adjustmentOkuma5Line filterSMCFH-440-04-000-P0106For systempressure confirmationTomitaFilled with g...

  • Page 97

    LE11-062-R1 P-84SECTION 6TECHNICAL DATA8.MANUAL HYDRAULIC TAILSTOCK (1SC)Standard106.3Travel 120 (4.72)(4.19)135 (5.31)_490 (19.21)28(1.10)r.t:»GifpX1TX$\ Tailstock clampscrew/Manual jointpinUnit: mm (in.)Fig. 6-15Manual Hydraulic Tailstock (Standard)ItemDimensionsRemarksCenterMTNo. 5Revoliving ...

  • Page 98

    LE11-062-R1 P-85SECTION 6TECHNICAL DATABuilt-in135 (5.31)Travel 120 (4.72) „ 136 (5.35)490(19.21)*rtj-Ioir2ri"i;oIK/\ Tailstock clamp screwManual joint pinUnit: mm (in.)Fig. 6-16Manual HydraulicTailstock (Optional)ItemDimensionsRemarksCenterMT No. 5Reviving centerOil pressure stroke120mm (...

  • Page 99

    LE11-062-R1 P-86SECTION 6TECHNICAL DATA(1) Tailstock Spindle Advance/Retraction Position Confirmation Device(Optional)AdjustingProcedure:a)Move the dog rightward.<1:~1Dog-ftr «*PP P19Adjusting boltRetract end confirmation proximityswitchOveradvance confirmation proximity switch,In-position co...

  • Page 100

    LE11-062-R1P-87SECTION 6TECHNICAL DATAb)Advancethe tailstock spindleas desired and reposition the tailstock body so that the workpieceis hold by thetailstock spindle. Step the tailstock spindle advancepedal tothe 2nd position.Under such setup turnthe adjustingscrew until both the overadvance dete...

  • Page 101

    3790-E P-88SECTION 7TOUCHSETTER M(OPTIONAL)SECTION 7TOUCH SETTER M (OPTIONAL)1.OVERVIEW OF TOUCHSETTERThe touch setter Mis the manualswing type tool presetterwhich is mounted atthe frontside oftheheadstock. Thissemi-automatic tool presetterensures accurate andeasy gauging and setting ofthe toolof...

  • Page 102

    3790-E P-89SECTION 7 TOUCHSETTER M (OPTIONAL)2.CAUTIONS ONHANDLING THE TOUCHSETTER(1) Gauging DirectionK™o%n_nmcN4-a)Thesensors allow gaugingin fourdirections. Each ofthesensors operateonly in one directionand the toolnose must bebrought into contactwiththepropersensor which operatesin therequi...

  • Page 103

    3790-E P-90SECTION 7TOUCHSETTER M (OPTIONAL)(4) Resettingthe SensorPositiona)If cuttingconditions (feedrate, toolnose R,etc.) are changed, surface roughnessin finishing ischangedand thefinishing dimensions changeaccordingly. Due to this,error is generated ingauging.To eliminate gaugingerror, mach...

  • Page 104

    3790-E P-91SECTION 7TOUCH SETTERM (OPTIONAL)3.RE-ADJUSTING THESENSORSince thesensor is accurately adjusted beforeshipping, itis notnecessary to adjustthesensor afterinstalling the machine.However, re-adjustmentbecomes necessary if thesensor positionisoffset due tomechanical shock orotherreasons. ...

  • Page 105

    3790-E P-92SECTION 7TOUCH SETTER M(OPTIONAL)4.SPARE PARTSElectrical SparePartsNo.Part NameMakerTypeQ’tyOkuma Part No.1MachineswitchMetrolH-4D-05-011E3045-857-019Limit switchOMRON2D4EP1A10E3019-397-1142

  • Page 106

    LIST OF PUBLICATIONSPublication No.DateEdition3790-EMarch 19941st

  • Page 107

    OKUMA OFFICESDOMESTIC OFFICESREGISTERED OFFICES1-32Tsujimachi, Kita-kuNagoya 462-91, JapanWORLD HEADQUARTERS—OGUCHI PLANTOkumaCorporationOguchi-cho, Niwa-gun Aichi, 480-01, JapanPhone (0587)95-7825 Fax (0587)95-6074 Telex 4573310 OKUMA JKANI PLANTOkuma Corporation2 Banchi, Shimogiri, Himegaoka,...

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