MINERVA NAVOD K OBSLUZE A SERIZENT INSTRUCTIONS FOR SERVICING AND ADJUS'TMENT PYKOBONCTBO 110 OBCNYKHBAHHW, YXONY M HANADKE ANLEITUNG ZUR BEDIENUNG UND EINSTELLUNG INSTRUCTIONS DE REGLAGE ET DE SERVICE INSTRUCCIONES PARA EL MANTENIMIENTO Y EL AJUSTE ISTRUZIONI PER L“USO E L”INSTALLAZIONE INSTRUKCJA OBSLUGI I REGULACJA 62761 -104 1 522 761 142 307 00 AUTOMATICKY DIRKOVACT STROJ KONFEKCNY AUTOMATIC EYELET BUTTONHOLE SEWING MACHINE ABTOMATHUECKA® UBEAHA MAIIMHA [il BBMETHBARMA MYTOBHYHBIX NETENb AUTOMATISCHE KNOPFLOCHNAHMASCHINE FUR DIE BEKLEIDUNGSINDUSTRIE MACHINE. AUTOMATIQUE A COUDRE LES BOUTONNIERES A L“OEILLET MAQUINA OJALADORA AUTOMATICA DE CONFECCION PERFORATRICE AUTOMATICA PER CONFEZIONI AUTOMATYCZNA MASZYNA KONFEKCYJNA - DZIERKOWARKA OXB worn a lu 12 13 14 15 16 17 18 19 20 21 22 23 24 25 CONTENTS The machine does. start but fails to do stitching an stops : The machine fails to do stitching but completes the movement cycle of the work holding table The machine fails to stop stitching The machine fails to reach its end position The machine fails to stop and repeats the cycle Knocking sounds at the machine start The machine fails to grip sewn work or releases it prematurely The machine fails to release sewn work Uneven pressure of presser feet The machine fails to cut through sewn work The cutting. lever sticks - fails to return Skipped stitches Skipped stitches at the bedinning of stiiching The seam end splits Upper thread rupture Lower thread rupture Needle rupture Irregular stitches in straight buttonhole sections Irregular stitch position in eyelet Disturbed symmetry of buttonhole rows Cutting of stitches with machine adjusted for cutting after stitching Decreased functional or aesthetic quality of button= hole 990 15210 1 12 13 ae 15 16 7 1s Denomination: Machine type: Machine speed: Power input: Machine head - height: = length: - width : Weight of machine head: Machine stend = height: = lengt = width Weight of machine stand: Needle: Threads = lower threa - gimp: Thickness of sewn work: Presser foot lift: Buttonhole length: Back tacking length: Stitch density: Stitch width: Lubrication: Buttonhole slit cuttin upper thread and SPECIFICATIONS eyelet buttonhole sewing machine 62761 ~ 104 up to 1700 ‘stitches per min 350 W 500 mm 465 mm 530 mm 60 kg 780 mm {with additional stand 1430mm/ 1100 mm 550 mm 85 kg 1807 .D No.90 for thin materials ' No.100 for coats No.110 for uppercoats synthetic thread 133 dtex x1x4 silk 100 dtex x2x3 cotton 145 dtex x3 600 dtex x3 up to 6 mm 10 mm 10 to 40 mm 4,5 to 8,5 mm 6 to 16 stitches per 1 om 2-4 mm / group lubrication before stitching CB after stitching CA 990 152@ SPI TIONS 19 Assortment of buttonhole shapes / o=not included in the standard / —_— cCoOe@COeO0Oee0ODODOONe Fo (00000000000 0000 C= 3/5 [00 @00B@0CSCBDCO00® be 3/sxt| 9000000000000 20 Equipments / on special order / 522 791 100 002 front stops 522 791 100 003 rule for distance between buttonholes 522 791 142 006 equipment for sewing 8mm long but- tonholes with taper bar 522 791 142 007 equipment for sewing 9mm long but- tonholes with taper bar 522 791 142 008 equipment for sewing 10mm long but~ tonholes with taper bar 522 791 142 O10 set of cams C= 7pcs 522 791 142 011 set of cams <=> 8pce 522 791 142 013 complete set of cams for buttonholes with taper bar 522 791 143 003 cutting blocks 10,19,26,32 522 791 143 004 complete set of washers l4pcs 522 791 195 002 throat plate-stitch width 3 to 4mm 522 791 195 003 gimp upper guiding - 522 791 195 008 throat plate-stitch width 2 to 3mm 522 791 195 009 straight presser feet 522 794 222 009 suspension-type Lichting | 990 162®) TO_SET THE MACHINE 1 -conténts oF sHeMENT 3 Machine head Machine stand with electrical equipment Instruction manual Machine catalogue Needles 1807 D = 5 pes Needle threader Threader wire : Gauge for adjusting the stitching mechanism 9 Pincers 10 Straight knife 1l knife 3/5 CA for cutting after sewing 12 Cutting block 12 Cutting block 16 Cutting block 29 Cutting block 38 13 Cam for eyelet ~ less buttonhole q4 Hand oil can is Screw driver 0,5 x 3,5 16 Screw driver 1x 6,5 17 Wrench 5,5=7 Ie Wrench 8-10 19 Wrench 13-17 29 Box spanner 10 21 Socket wrench 5 22 Stud extracting nut 23 Oil dish of machine 24 A set of 32 pes (connecting parts) evoaaune 2 -PREPARING THE MACHINE FOR SEWING ( While unpacking the machine, proceed in accordance with the instructions and marks on the packing Report any apparent damage which has occrred during transport to the forwarding agents immediately. Check the contents against the order and report any discrepancies to us immediately. We cannot recognise claims submitted at_a later date. =Set the machine stand on ite due place and fix ite stability by the rear rest actuated by a hand screw. -Using the screw, displace the hand lever to a posi- tion above the stand plate. -Take the machine head out of its packing, remove the surplus of preservation grease from it and check it Visually. Use the cut-outs provided in the front and rear parts of the machine frame to handle the machine. In some shipments, the covers are partly removed. 990 152 5TO_SET THE MACHINE To inetallthem,use ‘the drawings comprised in the Catalogue of spare|parts. Using the attached connecting parts 681/24, fix the machine head to the stand plate as schown in the drawing. To gain access to the rear screws, tilt away the machine head in the frame. Insert the oil dish (A) between the resiliet fixation members. 990 152TO SET THE MACHINE =Set the V-belts on the motor pulley, having first removed its cover. After the loosening of their screws, the motor pulleys can be axially adjusted so es to permit the belt run without collision with the covers or with the table plate. -Before connecting the machine to the mains check whether the pawl(©)fits in the stop motion wheel. If not , let it fit in by adeguately turning the hand wheel). -Having connected the machine to the mains check whether the motor turns in the correct sense(see the drawing). After the main switch has been switched on, the motor can be started at will by the treadle or by the hand lever C2. -The machine should be situated in a plece ensuring that the minimum distances, as specified in the ac- companying drawing, are maintained: | WALL, MACHINE W verosrt TABLE I commUNICATION ROAD WW position OF THE NEXT Soe | ® ® © © | 06 O4 06 06 O4 oO. 02 0 0 09 990 152 7TO SET THE MACHINE 3 - sarety measures (~ The machine design provides for keeping the valid security and hygienic prescriptions with normal use of machine. The following conditions and reguirements should be adhered to: % «The supply cable, furnished as a part of the machine, has a cross section of 4 x 1 mm an must be protected acgordingly in each phase. Before plugging-in the plug into the socket, make sure | that all switches are off. a The security prescriptions referring to the machine operation in workshops should be adhered to. The mo-= vable lead-in cable should be protected against me- chanical damages. | Avoid removing security devices or machine covers. | Never try to clean the machine or to remove the faults | while the machine ist running. %| Keep the electrical equipment in a good state according to the electrotechnical security prescriptions. % To remove faults, call-in a mechanician or an electro- mechanician. We cannot assume any responsibility for the consequences resulting from non-observance of these instructions. 990 152 8TO SET THE MACHINE = ORDERING FOR SPARE PARTS Please, specify in. each order: = Name and type of machine = Factory number of machine = Numbers of spare parts as specified in the Spare part catalogue 5 Please, address your remarks about the machine to the producer: MINERVA -.<).0.5c2 Branch Establischment at PROSTEIOV Czechoslovakia Sales Dept. Post Directing No. 796 25 Telephone: 0508/ 2928,2929 Telex: 62595 Telefax: (42) 0508/66522 990 152© - SERVICING OF MACHINE 4] DESCRIPTION OF MACHINE FUNCTION The starting position of the machine depends on whether the machine is adjusted for cutting before or after stitching. Unless otherwise specified in the order, the machines are suplied from the factory adjusted for cutting before ‘stitching. When adjusted for cutting before stitching, the star- ting (and, at the same time, the end) position of the machine work table lies about 4,5 mm before its rear position. After the machine is started, the plate re~ mains motionless in this position until the sewn work ist gripped by the presser feet and cut by the cutting lever, Then, the cutting lever goes back up, and the plate moves with high speed first to its rear position, and then back to the operator to a position where the actual stitching shall begin. The buttonhole length can be adjusted by means of @ stop situated adjust- ably with respect to a scale. During the high speed movement, the clamping pletes of the presser feet open automatically thus spreading the cutthrough sewn work end ensuring a clean stiiching of the buttonhole. The range of spreading is adjustable. In the place corresponding to the adjusted buttonhole Length, the clutch of the drive shaft is automatically released and the buttonholing with two-thread chain stitch begins. As soon as the buttonhole is completely sewn, the stitching stops in the upper needle position an the plate is displaced with high speed to its ini- tial position. Before the stop, the clamping plates open automatically and release the sewn work. The whole cycle can also be carried out by means of hand crank situated on the left side of the machine, It is, however, necessary to stop it at the moment when the clamping plates have released the sewn work,and then turn the hand wheel so as to restore the initial posi- tion of the stitching ‘mechanism. In the machine adjusted for cutting after stitching, the initial (and, at the same time, the end) position is that of the table rear position. the machine run begins by the movement of the plate towards the opera- tor accompanied by the automatic movement of the ‘presser feet to their clamping position. The buttonhole is cut through only after it is completely sewn, before the automatic release of the presser feet. Use of Machine: The machine is used for semi-automatic stitching of buttonholes [of various lengths and forms, i.e. with or withou eyelet, with taper bar or without bar, with a two-thread chainstitch with one inserted gimp. 990 1 52 10SERVICING OF MACHINE , @ Switch switch @ Insert Sewn work under the presser feet and start the machine by means of the lever (B).The front stops and the rule for adjusting the distance between two neighbouring buttonholes facilitate their correct positioning ( A 20 ), @8efore machine start, the correctly po- sitioned sewn_work can be fixed by means of the lever). ; @8y depressing and holding _in depressed position the pushoburton during the stitching of the buttonhole, you prevent \————— i the presser feet from releasing the sewn work and obtain the possibility to repeat the releasing the sewn work and obtain the possibility to repeat the stitching of the buttonhole. @The buttonholing can be stopped immediately at any phase of the cycle by means of the treadle or of the hand Yever ©) @8y depressing the lever(E)during a buttonholing cycle, you disconnect the stitching mechanism but do not affect the table movement which goes on up to the cycle completion. If the lever()has been depresaed only after the machine had been stopped by the lever @)or by the treadle . it ts necessary to rotate then the hand wheel G9 its basic closed position to avoid the risk of a subsequent ‘needle rupture. 3B -10 exchance THE a) 2 The machine erquires the use of needles 1807 D - Nos. 90,100, 110.Needles 16x231 may be used in exce= ptional cases, but only in connection with adequate setting| of the needle bar position. 1807 0 71 990 152© SERVICING OF MACHINE AL to THREAD THE MACHINE Suitable threads are spe~ cified in section (A 10). Threading is easy when using the threeder contained in the accessories B 1. 990 152© 5-10 apaust THE BUTTONHOLE WIDTH SERVICING OF MACHINE Excessive tightening of the machine brake (E 15) results in increased | stitch density! 8 -surronnove SHAPE_ — (| mgt) = | This re-adjustment requi- | res the use of adequate cutting block as well C 10 990 152© SERVICING OF MACHINE Q =~ CHANGING THE BUTTONHOLE SHAPE - EXCHANGE Of CAMS When exchanging the shape defining cam, do not omit the following: =setting the buttonhole length (c 8) =mounting adequate cutting block (Cc 10) @ The knife and the cutting block | are exchangeable.After each ex- | change of them check whether the| |\ buttonhole slit is cut neatly. | || It is advised to insert a bit of | paper to be cut check the slit | for uniformity. @The noe gyeh to be adjusted by the nut(A)should be as small lt fe as possible a @It is not advised to repair the knife when damaged. For repair of worn cutting blocks, use machine grinding, scraping, or emery=grinding. 990 152 td© SERVICING OF MACHINE T]- A00USTMENT FoR CUTTING BEFORE/AFTER STITCHING After a re-adjustment let the machine CA cB! carry out a stitching cycle (without stitching) = the first cycle will be incomplete! Check carefully that: a)with adjustment I, there are no knocking sounds of drive teeth b)with adjustment II, it is possible to fix sewn work by clamping it by hand in the ehd position Adjust even spreading of one side with respect to another. 990 152 5© SERVICING OF MACHINE 13 - To CHANGE THE MUTUAL POSITION OF THE TWO STITCH ROWS 990 152 ar= MAINTENANCE REWIEW 1x daily (after lo hours of operation) to clean the stitching mechanism “to remove wastes from the oil dish 1x weekly (after 80 hours of operation) -Visual check (with covers removed) lubrication according to the lubrication review 1x monthly (after 300 hours of operation) “iubrication according to the lubrication ! review 1x in 6 months (after 1,500 hours of operation) =general inspection of machine “checking the plays in the drive system for stitching mechanism setting the play of the work feed fork “checking the adjustment of mechanism: . “checking the tightening of sgrew connections “refilling the grease according to the lubri-~ cation review checking the state of electrical equipment “exchanging grease in ball bearings end needle bearings Recommended lubrication oil: ESSO Teresso 32 Recommended lubrication grease: ESSO Beason 2 Recommended values of screw torque: us | © 0.5) 0.6)F 0.8 Ma 1.2 1.5 2 MS 215 3 4 M6 4 5 7 Na me 8 16 mao | 10 30 maz 20 45 990 152 7MACHINE MALNTENANCE & 2 -warine oracean XX 990 152 7 or zm FoR 18MACHINE MAINTENANCE 3 LUBRICATION REVIEW _____ © cs @ oil @ oil tank | A lubrication greasexs= A lubrication greese tx BOHOURS — 4x 300HOURS_ eo 1x 1500 HOURS > other lubrication places marked in red TS was 0 Tt 990 152 LJ®© MACHINE ADJUSTMENT TO ADJUST THE PARALLELISM OF THE TABLE MOVEMENT Loosen the nut of the lever and adjust with reference © the cut slit r * Loosen the screw(@) and set the renee ens, using the extérnal gauge *Using the. pivot ©)restore| the symmetry of the tur- ning movement *Using the pivot(@) set the, turning movement at 180°, 20© MACHINE ADJUSTMENT ~ TO ADJUST THE UPPER GEAR SEGMENT Loosen the screw()and set the d holder of the needle (@)at right angle to the loopers adjusted as described in E 2 = on the third tooth of the segment ©) Ah - TO ADOUST THE MACHINE START MECHANISM [ Set the letch(A)with a reserve providing for its reliable engagement 990 152 a© MACHINE ADJUSTMENT = TO ADSUST THE MECHANISM FOR STARTING THE STITCHING I. In the represented po- sition adjust the gap with screw Il. In the represented po- sition, at the highest point of the stroke, loosen the nut (8) and adjust the marked gap. Ill.tn the represented po- | ‘sition, adjust the gap | oy) 990 152© MACHINE ADJUSTMENT 6 -1o aoaust THE MECHANISM FOR STOPPING (DISENGAGING) THE STITCHING [Using screw@®, adjust the length of the other but- tonhole row. ILAdjust the pregsure of the spring(®). In the shown positi- gn,loosen the screw @®and adjust the gap. Check whether the locking lever has snapped at dic» engaged stitching 990 152© MACHINE ADJUSTMENT 7 =-to aooust THE IDLER PULLEY @Align the pin@with the index line C8 or CA and check the pres~ cribed gap in the ba~ sic position. @Correct a possible de- viation by shifting the pin(a)- Ih 7 alll is Q =10 aosusT THE PARALLELISM OF CLAMPING PLATES XM 990 152 2© MACHINE ADJUSTMENT JO = -T0 AdouST THE ACTUATING. LEVER OF THE PRESSER FEET ; Basic adjustment of the lever (A) according to the index lines (C 11) *For correction, displace the lever (A) in the range defined by the in- dex lines Using screw@), fix the ad- justed pressure position of Presser feet “Using screw@), adjust the minimum self-locking angle of the mechanism *Using screw(), provide for reliable engagement. *Using screw@), adjust the height of clear work space under the presser feet & Ye ms on = S J0M umes ~ Burpeeids yuetorsynsur- zt | 3995 | 4essesd kq Atpeq prey 40m umes: TT aangound eTpseu spts yz pue re8j sessc.d ey. 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