Instruction Manual HIGH SPEED CYLINDER BED 3-NEEDLE INTERLOCK STITCH MACHINE VG3511-8F Thank you for having purchased the Model VG3511-8F. Before using your VG3511-8F, please read the instruction manual and understand the contents well. A f ter reading the instruction manual, please keep it in a location where it is easily accessible to the operator.
CONTENTS S a f e t y i n s t r u c t i o n s ⅰ－ⅳ 1. Name of each part 1 2. Installation 2 2.1 2.1.1 2.1.2 2.2 2.3 2.4 2.5 2.6 2.7 T a b l e c u t t i n g d i a g r a m T a b l e t o p t y p e ( T y p e A : s t a n d a r d ) T a b l e t o p t y p e ( T y p e B ) T a b l e t o p t y p e M o t o r , b e l t a n d p u l l e y H a n g i n g b e l t B e l t c o v e r E y e g u a r d a n d f i n g e r g u a r d T h r e a d g u i d e p l a t e 2 2 3 4 5 6 6 7 7 2.
CONTENTS 6. Adjustments 6.1 6.2 6.3 6.4 6.4.1 6.4.2 6.4.3 6.5 6.6 6.7 6.8 6.9 6.10 6.11 6.12 6.13 6.14 6.15 6.
Safety instructions １． To ensure safe use ２．Installation and preparation Always observe the following instructions to ensure the safe use of the industrial sewing machines and devices. 2-1 Instruction and training 1-1 Application and purpose The sewing machine is designed to improve productivity in the sewing industry and must not be used for other applications and purposes. Do not use this sewing machine until it can be confirmed that safety measures for the drive units have been taken.
Safety instructions (4) When operating a new sewing machine, make sure the rotating direction of pulley agrees with the rotating-direction mark. 2-5 During operation (1) Be sure to operate the sewing machine with the safeguards such as belt cover, finger guard, and eye guard. (2) Never place the finger, hair or objects under the needle or close to the moving parts while operating the sewing machine. (3) Be sure to turn off the power supply switch when threading or replacing the needles.
Safety instructions 4-2 Alert pictorial markings This mark indicates the warning which, if not heeded, could result in death or Serious injury. This mark indicates the caution for high temperature. This mark indicates the warning which, if not heeded, could result in death or Serious injury. High-voltage applies in the control box. This label indicates that electric shock may be caused.
Safety instructions Rotating direction symbol iv
1. Name of each part Thread guide plate Seal plug (lubricating) SP device Handwheel Needle thread eyelet Oil sight window Needle bar guard Presser spring regulator Thread tension spring cap Adjusting screw (differential feed) Needle thread take-up guard Differential feed graduations Front cover Finger guard Oil sight gauge Main feed bar adjusting screw Hemming guide(right) Eye guard Screw (draining oil) Slide cover Suction pipe Fig.
Fig. 2-1 VG3511-8F 2 operator 4- Φ 9 Φ 16 countersunk hole depth 16 Refer to the instruction of the motor for dimensions A, B, C, and D. Section Y-Y Section X-X 3- Φ 9.5 (installing hole for motor) Ttable dimensions: 1200×595×50 center of pulley 2. Installation 2.1 Table cutting diagram 2.1.
Refer to the instruction of the motor for dimensions A, B, C, and D. Section X-X operator 4- Φ 9 Φ 16countersunk hole depth 16 3- Φ 9.5 (installing hole for motor) Table dimensions: 1200×595×50 center of pulley 2. Installation 2.1.2 Table top type (Type Ｂ ) Fig.
2. Installation 2.2 Table top type Install a machine correctly referring to Figs. 2-3 and 2-4. sewing machine ⑤ sewing machine ⑤ ① ① ⑤ ② ⑤ ② ⑤ ② ③ ④ ② ③ machine table Fig. 2-3 Fig.
2. Installation 2.3 Motor, belt and pulley See the instruction manual for the motor used and install the motor properly. 64.5 ㎜ 40° Clutch motor: To install the clutch motor, align the center of the machine pulley with that of the motor pulley when the motor pulley shifts to the left with toeing down the pedal. 5.5 ㎜ 10 ㎜ M-type of V-belt Fig.
2. Installation 2.4 Hanging belt ② ① Before hanging belt, ALWAYS turn the power switch OFF and check that the machine has already stopped. 10 - 20 ㎜ Use the M-type of V-belt. (1) Hang the belt ① on the machine pulley ② , and then on the motor pulley ③ while rotating the machine pulley. (2) Adjust the belt tension so that the belt has a slack of 10 - 20 ㎜ when its center is pushed with 10 N. (3) Lock the motor with the adjusting bar ④ . ③ ④ Fig. 2-6 2.
2. Installation 2.6 Eye guard and finger guard To ensure safe use, always install the eye guard ① and the finger guard ② on the prescribed position when operating. ① ② Fig. 2-10 2.7 Thread guide plate (1) Put the screws ③ into the hole of the thread guide plate ④ and push it to the left. (2) Fix the thread guide plate ④ with the screws ③ . ③ ④ Fig.
2. Installation 2.8 Accessories Install the accessories as the suction pipe(rear), the suction pipe support, the flexible hose and the speed controller on the machine as follows: (1) Install the speed controller ⑧ in the screw hole on the bottom of the lower knife holder. (2) Insert the suction pipe(rear) ① into the hole of the bottom of the lower knife holder bracket ② and fix them with the screw ③ . (3) Remove the screws ④ at the rear of the machine frame.
3. Sewing speed and rotating direction of pulley The maximum sewing speed is 5500 sti/min and usually sewing speed is 5000 sti/min (during intermittent operation). Run a new machine at speed about 15 - 20% lower than maximum speed during the first 200 hours (for about one month) so that a machine can offer a long service life in good condition. The rotating directions of the machine pulley ① and the handwheel ② are clockwise as shown in the figure. ② ① Fig.
4. Lubrication Before lubricating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 4.1 Lubricating oil Use YAMATO SF OIL No. 28. ① Never add additives to the oil. If added, it can cause the deterioration of the oil and the damage to the machine. Fig. 4-1 4.2 Lubricating When using a new machine, or a machine which has not been run for a while, supply a few drops of oil to the needle bar ① and the looper bar ② .
4. Lubrication Before lubricating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 4.3 Changing oil Period of changing: When using a new machine, change the lubricating oil after running a machine for 200 hours (for about one month). After that, change the oil once or twice a year. ① Procedure for changing: (1) (2) (3) (4) (5) Remove the belt cover. (See page 6.) Remove V-belt from the motor pulley. (See page 6.) Remove the machine from the machine table.
5. Proper operation 5.1 Needle system Use UY × 128GAS (UY128GAS). Select a proper needle in size depending on the thickness and type of fabric. Japanese standard Metric standard 9 10 11 12 13 14 65 70 75 80 85 90 Table 3 5.2 Installing needles Before installing, ALWAYS turn the power switch OFF and check that the machine has already stopped. (1) Loosen the screws ① with a screwdriver. (Fig. 5-1) (2) Remove an old needle with a pair of tweezers.
5. Proper operation 5.3 Threading When threaded, rethread by tying new threads with the preset threads. When not threaded, thread correctly as shown in Fig. 5-4. A: Needle thread Pull out the threads until they come to the front of the needles. Then, cut off the knots before passing them through the needle eyes. Thread correctly for the left needle which is in the inmost position as shown in the figure. B: Looper thread B C Pull the thread until the knot comes out. Then, cut off the knot.
5. Proper operation 5.4 Adjusting thread tension Adjust the thread tension with the thread tension spring caps ① depending on fabric type, thread type, seam width, stitch length, and other sewing conditions. ● To tighten the thread tension, turn the caps clockwise. ● To loosen the thread tension, turn the caps counterclockwise. ① loosen tighten Fig. 5-5 5.5 Pressure of presser foot Loosen the lock nut ② and turn the adjusting screw ③ to adjust the pressure.
5. Proper operation Before operating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 5.7 Adjusting movement of differential feed dog The differential ratio has been set from 1:0.7 to 1:1.4 at shipment. When aligned the differential feed lever(right) ① with the line ② of the differential feed graduations, the movement of the differential feed dog is the same as that of the main feed dog (differential ratio 1:1), resulting in uniform sewing.
5. Proper operation 5.8 Adjusting stitch length Stitch length is adjustable from 1.4 to 3.6 ㎜ . Table 4 shows the number of stitches per inch (25.4 ㎜ ) and 30 ㎜ converted to the stitch length. The main feed lever stopper ⑤ has been adjusted so as to stop at 3.6 ㎜ at the maximum with the screw ⑥ at shipment. Stitch length Number ou stitch Number of stitch (㎜) (per 1 inch) (per 30 ㎜ ) 1.4 18 21 2.0 13 15 3.0 8.5 3.6 7 10 8 Table 4 Adjusting procedure: (1) Loosen the lock nut ① .
5. Proper operation 5.9 Hemming guide(left) (1) Loosen the screw ② of the hemming guide(left) ① . (2) Align the right on the guiding part of the hemming guide(left) ① with that of the upper knife ③ . (3) Tighten the screw ② securely. ③ SUPPLEMENT See“7.1 Adjusting trimming position of fabric ”to adjust the right-and-left position of lower fabric. aligned ① ② Fig. 5-12 5.
5. Proper operation 5.11 Hemming guide(right) (1) Loosen the screws ② of the hemming guide(right) ① . (2) Align the right end of the hemming guide(right) ① with that of folded fabric set for hem width. (3) Tighten the screws ② securely. ① ② Fig. 5-14 5.12 Fabric guide(right) (1) Loosen the screws ④ of the fabric guide(right) ③ . (2) Align the left end of the fabric guide(right) ③ with the guiding part of the hemming guide(right) ① . (3) Tighten the screws ④ securely. ③ ① Fig.
5. Proper operation Before operating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 5.13 Raising upper feed roller (with puller mechanism) Move the upper feed roller lifting lever ② up or down to raise the upper feed roller ① when pulling out a fabric due to fabric jam. Raising the upper feed roller lifting lever ② keeps raising the upper feed roller ① . ② ① Fig. 5-16 5.
5. Proper operation Before operating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 5.15 SP device and HR device ① Use SP device (needle thread oiling) equipped as standard to prevent thread breakage and skip stitch when running a machine at high speed or using synthetic thread and/or synthetic fabric. Also use HR device (needle point cooling) as an extra. Use dimethyl silicon oil. Open the lid ① of SP container and the lid ② of HR container to check the oil level.
6. Adjustments Before operating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 6.1 Needle thread tension 34.5 ㎜ Needle thread take-up a Procedure: (1) Loosen the screws ② and ③ . ● To tighten the needle thread, move the needle thread take-up ① in the direction T. ● To loosen the needle thread, move the needle thread take-up ① in the direction L. (2) Tighten the screws ② and ③ securely.
6. Adjustments Before adjustment, ALWAYS turn the motor switch OFF and check that the motor has already stopped. As the needle thread loop may difficult to be formed depending on the type of thread, the looper can not catch the needle thread. This can cause skip stitch. In this case, thread the needle thread through the needle thread retainer disc ① and the needle thread retainer support which has been attached with the machine as accessories. ① Fig.
6. Adjustments 6.2 Top cover thread tension Loosen the screws ② and move the top cover thread eyelet(left) ① to adjust it. a ① Ｔ ● To decrease take-up amount, turn the eyelet(left) ① in the direction T. ● To increase take-up amount, turn the eyelet(left) ① in the direction L. Ｌ The part “a” on the top cover thread eyelet(left) ① is horizontal as standard. When using stretchable thread like stretchable thread, turn the top cover thread eyelet(left) ① in the direction L. ② for stretchable thread Fig.
6. Adjustments 6.4 Needle and spreader 6.4.1 Spreader ② 0.5 - 0.8 ㎜ (1) Loosen the screws ③ and ④ of the spreader holder. (Fig. 6-10) (2) Make the clearance between the left needle and the hook ② of the spreader ① to 0.5 - 0.8 ㎜ . (Fig. 6-8) (3) Make the clearance between the center of the left needle and the hook ② to 4.5 - 5.5 ㎜ when the spreader ① is at the extreme left. Then tighten the screw ④ securely. (Figs.
6. Adjustments 6.4.2 Top cover thread guide (1) Loosen the screws ② of the top cover thread guide ① . (Fig. 6-11) (2) Make the clearance between the top of the spreader ③ and the bottom of the top cover thread guide ① to 0.5 ㎜ . (Fig. 6-11) (3) Set the hook ④ in the center of the slot of the top cover thread guide ① when the spreader ③ is at the extreme right. Then, tighten the screws ② securely. (Figs. 6-11 and 6-12) ① ② ⑤ 1.0 ㎜ ① 0.5 ㎜ ⑤ ③ ③ Fig. 6-11 6.4.
6. Adjustments 6.5 Distance between needle and looper The distance “L” between the looper tip and the center of the right needle depends on the needle distance when the needles are at the lowest points and the looper ① is at the extreme right. ① See Table 5 and loosen the screw ② of the looper holder to adjust the distance. ② SUPPLEMENT The distance between the center of the needle bar and the looper ① tip is 6.0 mm even if the needle distance changes. needle distance （mark） gauge mark Ｌ Fig.
6. Adjustments 6.7 Height of needle (1) Install the needle to the left hole in the needle clamp. (2) Check the looper is inserted into the looper holder fully. (3) Turn the handwheel until the looper tip meets the center of the left needle. (4) Loosen the screw ① of the needle bar bracket and move the needle bar up and down. Adjust the looper tip to pass 0.8 - 1.3 ㎜ above the top of the needle eye. (5) Tighten the screw ① securely.
6. Adjustments 6.9 Needle and needle guard(rear) (1) Turn the handwheel clockwise to lower the needles at the lowest points. (2) Loosen the screw ① . (3) Align the line ③ on the needle guard(rear) ② with the centers of the needle eyes. (4) Tighten the screw ① securely. (5) Turn the handwheel until the looper tip meets the center of the right needle. (6) Loosen the screws ① and ④ , and move the needle guard(rear) ② back or forth. Make the clearance between the right needle and the looper tip to 0 - 0.05 ㎜ .
6. Adjustments 6.10 Needle and needle guard(front) (1) Turn the handwheel clockwise until the looper tip meets the center of the left needle. (2) Loosen the screw ① . Adjust the height from the needle point to the angular part of the needle guard(front) ② to 1.5 - 2.0 ㎜ . (3) Tighten the screw ① securely. (4) Loosen the screws ① and ③ . Adjust the clearance between the needle guard(front) ② and the left, or right needles to 0 - 0.3 ㎜ respectively. (5) Tighten the screws ① and ③ securely. ② 1.5 - 2.
6. Adjustments 6.12 Changing range of differential ratio Differential ratio 1:1.1 - 1:2 (1) Remove the side cover ① (three pcs. of screws). (2) Remove the screw ② of the differential feed bar connection ③ . (3) Fix the differential feed bar connection ③ in the hole ④ with the screw ② . ＮＯＴＥ Max. stitch length of the main feed dog is 2.3 ㎜ in a differential ratio of 1:2, and 3.0 ㎜ in 1:1.5 respectively. ① Fig. 6-27 1:2 gathering 1:1.5 1:1.1 Fig. 6-28 ③ ③ ② ④ ② Fig.
6. Adjustments 6.13 Presser foot lift The presser foot lift for the needle distance 5.6 ㎜ is as follows: - with spreader: 5.5 ㎜ - without spreader: 7.0 ㎜ ② (1) Loosen the lock nut ① . (2) Push down the lifter lever ② to make the lift between the top of the stitch plate and the bottom of the presser foot to 5.5 ㎜ (7.0 ㎜ ). (3) Apply the screw ③ to the lifter lever ② when the presser foot is raised by 5.5 ㎜ (7.0 ㎜ ). (4) Tighten the lock nut ① securely. (5) Loosen the screws ⑤ of the collar ④ .
6. Adjustments 6.14 Replacing fabric presser The fabric presser ② for hem width 19.1 ㎜ (3/4 inches) has been set on the right of the presser foot ① at shipment. Also packed for 25.4 ㎜ (one inch). Use the fabric presser depending on hem width. To remove the fabric presser ② , loosen the screw ③ of the presser foot ① . ③ ① ② Fig.
6. Adjustments 6.15 Feeding amount of puller (with puller mechanism) (1) Remove the top cover seal plug ① . (2) Rotate the handwheel until the screw ② of the upper feed roller regulator comes right above. Loosen the screw ② with a hexagon socket screwdriver. (3) Rotate the handwheel until the adjusting screw ③ comes right above. (Fig. 6-34) (4) Turn the adjusting screw ③ to adjust the feeding amount. ① increase decrease ③ ● To decrease the amount, turn it clockwise.
7. Trimming mechanism Before operating, ALWAYS turn the power switch OFF and check that the machine has already stopped. 7.1 Adjusting trimming position of fabric Loosen the screw ① of the lower knife braket to move the lower knife holder ② right and left. ④ ③ Adjust it as follows: (1) Loosen the screw ① . (2) Move the lower knife holder ② at required position. (3) Tighten the screw ① with a tightening torque of 1.5 2 N･m.
7. Trimming mechanism 7.2 Adjusting suction pipe(front) Set right-and-left position of the suction pipe(front) ② about 5 ㎜ apart from the left side of the chip receiver ④ . Loosen the screw ③ to adjust the position of the suction pipe(front) ② or remove it. 5㎜ ☆ Suction by compressed air: Adjust the suction power with the speed controller ① . Keep the pressure to a minimum for suctioning the chips.
7. Trimming mechanism 7.4 Removing and resetting lower knife Removing the lower knife: (1) Loosen the screw ② of the collar(left) ① . (2) Move the upper knife holder ④ to the left and make the clearance between the upper knife ③ and the lower knife ⑤ . (3) Tighten the screw ② slightly. (4) Loosen the screw ⑥ of the lower knife ⑤ and pull out the lower knife ⑤ downward. ② ① Resetting the lower knife: (1) Make the lower knife ⑤ blade even with the top of the stitch plate.
7. Trimming mechanism 7.5 Removing and resetting upper knife Removing the upper knife: (1) (2) (3) (4) ⑨ Loosen the screw ⑥ on the upper knife holder ④ . Remove the upper knife holder ④ . Remove the screw ⑦ on the upper knife ③ . Remove the upper knife ③ . ④ ② ① Resetting the upper knife: (1) Attach the upper knife ③ to the pin ⑧ in the upper knife holder ④ and tighten the screw ⑦ securely. (2) Set the left end of the chip receiver ⑨ fixed on the left of the upper knife holder ④ 1.
7. Trimming mechanism 7.6 Adjusting upper knife stroke Adjust the stroke of the upper knife to 3.0 - 6.5 ㎜ . It has been adjusted 4.0 ㎜ at shipment. Adjust the stroke as follows: (1) Loosen the screws ① to remove the bracket cover ② and the bracket cover gasket ③ . (2) Loosen the nut ⑤ on the upper knife adjusting lever pin ④ to adjust it. ● To make stroke smaller, move it in the direction Y. ● To make stroke larger, move it in the direction X. (3) Tighten the nut ⑤ securely.
7. Trimming mechanism 7.7 Sharpening knives If the knives cut badly, re-sharpen the lower knife ② . Prepare the cold water and re-sharpen the lower knife with keeping it cool. Re-sharpen the correct angle as in the figure. ① ② ＡＤＶＩＣＥ Normal grinder is not useful to sharpen the upper knife ① made of super hard alloy. Contact us directly or the dealer for re-sharpening it. Fig. 7-14 10° 45° Fig.
8. Specifications Model VG3511-8F Description High speed cylinder bed 3-needle interlock stitch machine with left hand trimming mechanism Dimensions 470 ㎜（L）× 220 ㎜（W）× 405 ㎜（H) Circumference of Cylinder 340 ㎜ Weight 41.5 kg Stitch Type ISO 406, 407, 602, 605 Application Hemming operation of knitted fabric for lightweight material Sewing Speed Up to 5500 rpm (during intermittent operation) 1.4 - 3.6 ㎜ Stitch Length Number of stitches per inch(25.
4-4-12, NISHI T ENM A , K I T A - K U , O S A K A , J A P A N T E L：81- 6 - 6 3 6 4 - 5 6 21 F A X：81- 6 - 6 3 6 5 - 718 5 〒５３０- ００４７ 大 阪 市 北 区 西 天 満4 丁 目4 番12 号 TEL（ ０ ６）６ ３ ６ ４- ５ ６ ２１（ 代 ）FAX（ ０ ６）６ ３ ６ ５- ７１８ ５ P/N 9720349（Ｉ） No.1 Edited in 2009.9 （VG3511-8F) Printed in Japan 2009.8.
