Yamato VT2500 User Manual Download

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Thank you for purchasing this product. This instruction manual contains infor-
mation on how to handle this product and precautions in usage. Before using
the product, read this instruction manual carefully and familiarize yourself with
its content. Also, keep this manual in safe handy place so that others may use
it as future reference.

Instruction Manual

3-Needle Cylinder Bed

Interlock Stitch Machine

VT2500

Class

VT1500.2500_01

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Summary of Contents for VT2500

Page 1: ...t and precautions in usage Before using the product read this instruction manual carefully and familiarize yourself with its content Also keep this manual in safe handy place so that others may use it as future reference Instruction Manual 3 Needle Cylinder Bed Interlock Stitch Machine VT2500 Class VT1500 2500_01 ...

Page 2: ...guard installation 9 2 8 Presser lifter pedal installation 10 2 9 Supplementary cover installation 11 3 Sewing speed and pulley rotating direction 12 4 Lubrication 13 4 1 Lubricating oil 13 4 2 Lubricating 13 4 3 Changing oil 14 4 4 Oil filter check and replacement 15 5 Proper operation 16 5 1 Detaching reattaching cylinder front cover 16 5 2 Needle system 16 5 3 Needle installation 16 5 4 Threadi...

Page 3: ...to the indicated illustration 5 10 Using Presser Foot Release Lever 20 5 11 Fabric edge guides adjustment 21 5 12 Cleaning 22 6 Machine adjustment 23 6 1 Needle thread tension adjustment 23 6 2 Top cover thread tension adjustment 24 6 3 Looper thread tension adjustment 24 6 4 Needle and spreader adjustment 25 6 4 1 Spreader adjustment 25 6 4 2 Top cover thread guide adjustment 26 6 4 3 Top cover t...

Page 4: ...frequency welding machines 1 4 Unpacking and transportation 1 Unpack from the top 2 Never hold the parts near the needle or threading parts when removing the sewing machine head from the buffer of box 3 When carrying the sewing machine head have an assistant 4 Pay attention not to get excessive impact or shock when moving the sewing machine head with a pushcart 2 Installation and preparation Alway...

Page 5: ...eading or replacing the needles 4 Never place your hands close to the knives when operating the sewing machine with the trimming devices 5 Be sure to turn off the power supply switch when terminating the sewing work or leaving the sewing machine 6 If the sewing machine malfunctions abnormal sound or smell something unusual while operating be sure to turn off the power supply switch 2 6 Removal 1 T...

Page 6: ...label indicates that electric shock may be caused This mark indicates the caution which if not grounded the machine or device could malfunction and could result in personal injury 5 Warning labels on sewing machines 1 2 This label indicates that removal of the safeguards and works except for sewing performance while the power supply switch is on are prohibited For details see the next page High vo...

Page 7: ...ion of Safety Labels Safety labels are placed adjacent to potential hazards Keep these labels clean and easily readable at all times should a label become damaged or lost a replacement should be ordered 1 2 Safety Instructions ...

Page 8: ... Presser spring regulator Lifter lever Differential lever Thread tension unit Oil sight window Presser foot Pushbutton Chain cutter Eye guard Oil gauge Oil reservoir Pulley Cylinder front cover 001 002 Finger guard 003 Presser foot release lever ...

Page 9: ...gs 343 5 359 Operator 25 80 R25 R25 R10 154 230 C D 41 222 257 Belt center Presser lifter shaft support Table external dimensions 1200 595 40 mm 60 10 Section Y Y Section X X 3 φ9 5 Motor installation hole 3 φ26 7 50 B A E F 15 224 5 Pedal position Right 260 270 200 410 Left E F For dimensions A B C and D see the Instruction Manual of the motor Presser lifter shaft support installation location ...

Page 10: ...CAUTION 2 1 2 Installation onto table Install the sewing machine correctly as shown in Fig 004 005 and 006 1 Attach the bolts and nuts to the machine table 2 Cover the bolts with the rubber cushions 3 Set the sewing machine over the rubber cushions Rubber cushion Nut Bolt Machine table Machine table Sewing machine Rubber cushion 005 006 ...

Page 11: ...ation location Right Left Section X X 4 places Section Y Y Table external dimensions 1200 595 40 mm Internal dimension between table legs Operator Machine pulley center E F E F 270 260 410 200 Presser lifter shaft support 007 2 2 Semi submerged type 2 2 1 Table cutting diagram ...

Page 12: ...weighs 42 kg or more Work in twos or more when unpacking carrying and installing the machine CAUTION Machine table Supporting board Machine For dimensions A B C and D see the Instruction Manual of the motor 2 2 2 Installation onto table Properly install the sewing machine referring to the figures 007 008 009 and 010 1 Attach the bolt 4 in total to the supporting board 2 Cover the bolt with the rub...

Page 13: ...anual of the motor you are using Calculate motor pulley outer diameter from the below formula Or select the best size of motor pulley from Table 2 Sewing speed Motor pulley O D 66 5 5mm Servomotor speed Commercially available pulleys have outer diameters with every 5 mm increment therefore select a pulley of an outer diameter that is near to the calculated outer diameter Belt Use an M type V belt ...

Page 14: ...other end of belt around the motor pulley 3 Stretch the belt so that the belt has a 10 to 20 mm slack when a force of about 10 N 1 02 kgf is applied to the center of the belt 4 Once the belt is sufficiently taut securely lock the motor pulley How the motor is locked down differs depending on motor therefore see the instruction manual of the motor SUPPLEMENT Semi submerged installation of the machi...

Page 15: ...nstalled hands clothing or the stitched fabric may become entangled in the belt resulting in injury or damage CAUTION 016 014 015 017 1 Insert the screws halfway into the oil reservoir 2 Fit the holes on the supplementary belt cover over the heads of the screws slide the cover to the rear and tighten the screws 3 Attach the belt cover lower to the sewing machine with the screws 4 Fit the belt cove...

Page 16: ...each left and right 2 Attach the tension release lever connector to the lifter lever with the screw 3 Press the lifter lever downward to check it moves smoothly 020 019 018 2 7 Eye guard and finger guard installation Use the sewing machine with the eye guard and the finger guard attached Also lower the eye guard to the set position when working CAUTION ...

Page 17: ...r shaft support as shown in the figure 3 Check that the presser lifter shaft lower turns smoothly 4 Move the collar to the left and right so that the arm of the presser lifter shaft lower is directly beneath the lifter lever 5 Lock down the arm of the presser lifter shaft lower so that it is parallel to the lifter shaft lever 6 Connect the arm of the presser lifter shaft lower and the lifter lever...

Page 18: ...nstalling the supplementary cover Working with the power on can result in injury CAUTION 023 024 2 9 Supplementary cover installation Attach the supplementary cover to the cylinder front cover with the screws The fabric edge guides can be attached to the supplementary cover with the screws and the washers ...

Page 19: ...achine at 15 to 20 lower speed of its maximum sewing speed during the first 200 hours approx 1 month so that it will offer a long service life in good condition Both the motor pulley and the machine pulley rotate in the clockwise direction If the pulleys rotate in reverse direction oil can not be properly supplied to parts resulting in sewing machine breakdown CAUTION 025 ...

Page 20: ...il resulting in sewing machine breakdown CAUTION 4 1 Lubricating oil Lubricating oil YAMATO SF OIL No 28 Capacity of oil reservoir 600 mL 4 2 Lubricating When using a sewing machine for the first time A sewing machine is shipped with the oil drained Before using a sewing machine for the first time charge with oil To add oil remove the rubber seal plug labeled OIL and add oil up to the top line on ...

Page 21: ...install the belt cover See page 7 and 8 4 3 Changing oil Oil changing interval With a new sewing machine change the lubricating oil after about 200 hours approx 1 month of use After that change the oil once or twice a year How to change 1 Remove the belt cover See page 8 2 Remove the V belt from the sewing machine See page 7 3 Remove the sewing machine from the machine table 4 Set a container for ...

Page 22: ...ed with dirt Check the filter for clogging and breakage every 6 months If very little oil is sprayed out from the nozzle despite a sufficient charge of oil or if there are many bubbles in the oil check and replace the oil filter Check and replace Remove the oil filter cap pull out the O ring and the oil filter and check the oil filter If the oil filter is clogged with dirt clean or replace with a ...

Page 23: ...5 80 85 90 5 Proper operation 5 1 Detaching reattaching cylinder front cover Detaching Slide out the cylinder front cover towards your side Reattaching Align the cylinder front cover with the pins and slide it onto the sewing machine until hearing it clicks 5 2 Needle system Proper needle system for this sewing machine is UY x 128GAS needles Select a proper needle in size according to type and thi...

Page 24: ...reads A Needle threads Pull the thread knots to the front of needles cut the knots off and rethread through the needles B Top cover thread Pull the thread until the knot comes out C Looper thread Pull the thread until the knot comes out then cut the end with scissors CAUTION SUPPLEMENT A B C 037 SUPPLEMENT If the needle threads need to be tightened pass the threads t h r o u g h h o l e s a s show...

Page 25: ... Relieve presser foot pressure as much as possible within a range that keeps the stitch stable 1 Loosen the lock nut and turn the presser spring regulator To increase the pressure turn the regulator clockwise To decrease the pressure turn the regulator counterclockwise 2 Once pressure has been adjusted tighten the lock nut 5 7 Differential feed adjustment 1 Loosen the lock nut 2 Adjust differentia...

Page 26: ...rom 1 2 mm to 4 0 mm Each graduation on the pulley indicates a stitch length mm The actual length of the stitch may vary depending on the type and thickness of fabric and differential ratio Changing Stitch Length 1 Press the pushbutton with your left hand until feeling the button tip contact the internal part 2 With the pushbutton still depressed turn the machine pulley to the front with your righ...

Page 27: ... remove the felt from the device If left inside it may adversely affect sewing condition If dimethyl silicon oil is adhered to other than the SP device be sure to wipe it off Adhering dimethyl silicon oil can result in sewing machine breakdown 5 10 Using Presser Foot Release Lever To remove sewn pre closed materials perform maintenance or clean the machine while keeping the presser foot up move th...

Page 28: ...c edge guide right adjusts the fold width of the fabric 1 Loosen the screws and slide the fabric edge guide right to the left and right until properly positioned To greatly reposition the guide use other screw holes 2 Tighten the screws The fabric edge guide left adjusts the left edge of the folded fabric 1 Loosen the screw and slide the fabric edge guide left to the left and right until properly ...

Page 29: ... on hands or clothing may become entangled whereby resulting in injury At the end of work everyday remove the cylinder front cover and clean away dust and lint accumulated in the sewing machine Once a week remove the cylinder front cover and the presser foot to clean the grooves in the stitch plate and the feed dog area 5 12 Cleaning ...

Page 30: ...dle thread loops can be adjusted with the needle thread strike off pins While the needle thread strike off pins are in the standard positions the top of the needle bar thread eyelet becomes flush with the bottom of the recess of the pins when the needle bar reaches the lowermost position See Fig 053 Loosen the screws to adjust the needle thread strike off pins Once the pins have been positioned ti...

Page 31: ...ead or other stretchable thread as the top cover thread lower the top cover thread take up eyelet 6 3 Looper thread tension adjustment Thread Take up Eyelet Adjustment The thread take up eyelet is at the standard position when the screw is at the lowermost position of the slot Loosen the screw to adjust the thread take up eyelet Once the eyelet has been positioned tighten the screw To decrease tak...

Page 32: ... adjustment so that the distance from the center of the left needle to the hook is 4 5 5 5 mm when the spreader is at the extreme left Then tighten the screw See Fig 057 and 058 4 Make adjustment so that the distance from the top surface of the stitch plate to the bottom surface of the spreader is 11 12 mm Then tighten the screw See Fig 057 and 059 SUPPLEMENT Match the height of the spreader accor...

Page 33: ... slot on the top cover thread guide when the spreader comes to the extreme right Then tighten the screws See Fig 060 and 061 6 4 3 Top cover thread eyelet adjustment 1 Loosen the screw of the top cover thread eyelet See Fig 061 2 Adjust the top cover thread eyelet so that the clearance between the top surface of the top cover thread guide and the top cover thread eyelet is 1 0 mm when the needle b...

Page 34: ... See Fig 064 6 5 2 Looper angle and height Insert the looper to the end of the looper holder and tighten the screw Looper height and looper installation angle 2 will be fixed 6 5 3 Looper front and rear position 1 Turn the machine pulley until the tip of the looper comes to the center of the left needle 2 Loosen the screws to adjust the looper holder together with the looper holder collar so that ...

Page 35: ...kage 6 6 Needle height 1 S e t t h e n e e d l e i n t o t h e l e f t n e e d l e installation hole of the needle clamp 2 Remove the screw 3 Loosen the screw of the needle bar bracket and adjust the needle bar in the vertical direction so that the tip of the left needle is the height N given in Table 7 from the stitch plate top surface This height varies depending on needle distance 4 Check the n...

Page 36: ... right needle therefore the right needle will be pushed by the needle guard rear and the clearance between the needle and the looper will be 0 0 05 mm Also at this time adjust the angle and front and rear position of the needle guard rear so that the clearance between the left needle and the needle guard rear is 0 0 05 mm 3 Check that the middle and left needles start contacting the needle guard r...

Page 37: ...ntial feed dog middle feed dog and main feed dog to the same height Adjustment Loosen the screw of the differential feed dog the screw of the main feed dog and the screw of the middle feed dog and position the feed dogs Once the feed dogs have been positioned tighten the screws 6 10 Presser foot position adjustment Correctly set the presser foot on the presser bar and position the presser foot so ...

Page 38: ...is 0 3 mm when the presser foot is at the topmost position 6 12 Detaching reattaching presser foot Detaching 1 Loosen the screw 2 Press the lifter lever downward and detach the presser foot Reattaching 1 Press the lifter lever downward and insert the presser foot into the presser bar 2 Position the presser foot as explained in 6 10 Presser Foot Position Adjustment page 30 and tighten the screw Sti...

Page 39: ...the thread at the tension unit 18 Is the needle too thick for the thread Either replace the needle or the thread with the proper size 16 Is the thread good quality Use a good quality thread Did the thread break under heat Use the SP device 20 Is there damage on eyelet looper thread take up etc Either repair the damage or replace with a new part Needle breakage Did the needle contact the looper Cor...

Page 40: ...tches inch 25 4 7 5 25 stitches 30mm Needle system UY 128GAS 9 14 Standard 10 65 90 Needle distance 3 needle 4 8 5 6 6 4 2 needle 3 2 4 0 Needle stroke 31 5 Presser foot lift 8 with spreader Feed regulation Pushbutton system Differential ratio Max normal differential 1 2 Max reverse differential 1 0 8 Differential feed regulation External lever Lubrication Automatic lubrication by trochoid shaped ...

Page 41: ...A KIT A KU OSAK A JAP AN T E L 81 6 636 4 1321 F A X 81 6 636 4 1307 ５３０００４７大阪市北区西天満 4 丁目 4 番 1 2 号 TEL ０６６３６４１３２１代 FAX ０６６３６５５１７６ Printed in Japan 2008 5 1H Y P N 9720256 I No 2 Edited in 2008 5 VT2500 ...

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