Revo DCZ-200-GS User Manual

Thank you for your kind patronage to REVO By purchasing REVO DCZ-200- GS High Speed Self Lubricated Overlock Sewing Machine.

We are sure by installation of this machine in your workshop, you can get relief from your repeated troubles caused by the out-dated models of Overlock machines being used by you.

Further more it will make wonderful contribution, certainly to the productivity when the machine is operated appropriately.

To acquainte the users with proper operation adjustment and maintenance about this machine we are providing this Instruction-Manual.

Heartily wishing you successful service by REVO DCZ.

INTRODUCTION

SPECIFICATION

Name : High Speed Overlocked Stitch Sewing Machine

Dimensions : 350 x 225 x 285 mm.

Weight : 21 Kgs

Construction : Dust-Proof, Oil-tight, Enclosed completely.

Stitch type : Overedge seaming

Sewing Speed : upto 6,500 s.p.m.

Stitches per inch : 6-20 stitches per inch, 7- 23.5 stitches per 30mm

Use : Overedge Seaming, Blind Hemming and other uses on general or knitted materials.

Width of Overedge Seam : 3 - 4 mm, Standard and 2 - 8 mm is available by exchange of necessary Gauge Parts.

Stroke of Needle : 25 mm.

Needles : DC x 1 size 9 to 18

Adjusting of Feeding : Exchange of Eccentrics.

Knives for Fabric Cutting : Lower Knife - Made of Special Steel Flat type. Upper Knife - Made of Super Hard Alloy.

Lubrication : Force Feeding by gear pump and pressure regulating valve, and Splashed Oil is also

utilized.

Lubricant : Use H.P.'s TURBINOL-46, CASTROL's PERFECTO T-46 or any equipment Lubricant.

Keep Oil upto Maximum Level marked in the oil Indicator.

Change the entire Oil after Three Months or 1000 working hours which may be achieved earlier.

Capacity of Reservoir : ONE LITRE

INSTALLATION

Fix Supporting Board to the Table by Bolts and Nuts, on which the Rubber Cushion Holder Plate shall be fixed by Wood Screws. $ Rubber Cushions must be put exactly into each horrow on the plate when settiing machine.

Machine Table

Supporting Board

-- Fixing --

-- Fitting of Belt Cover--

-- Dimensions for Semi-submerged Installation --

230

106

135

200

175

214

100

260

D D

280

365

Operator

200

105

4-15

4-7.9

Section D-D

SEWING SPEED AND TURNING DIRECTION OF PULLEY

However the available highest sewing speed is 6,500 s.p.m., from the view point of durability of machines, it is preferable to operate at the economical speed of 6,000 s.p.m. after the initial operation at 5,000 s.p.m. in 200 hours approximately -- one month.

LUBRICATION

Lubricant. CASTROL'S PERFELTD T-46 is recommendable.

Feeding of Oil

At the time of Despatch, the oil will have been drained completely from the machine, So, it should be filled with Clean Oil to the Upper line of Oil Gauge (A) removing Screw at the mark "OIL"

Note : At the beginning of operation of brand-new machines or the re-use of machines rested long time, Clean Oil must be fed around Needle Guard and Upper Looper Bar additionally.

Oil Gauge and Confirmation of Oil Flow

Check Oil Guard everyday before operation replenish clean oil if the surface of oil is below the under line. At the beginning of operation, confirm that the oil is flowing smoothly out of Oil Sight Nozzle (B) inside machine.

Exchange of Oil

To keep the machine's life long time, oil for new machine must be exchanged completely with new one after the initial operation of about 250 hours, And, after the above , it must be exchanged in 2- 3 times every year, Exchange of Oil shall be made according to the following order.

(1) Remove V-Belt from Motor Pulley and take out machine-head to top face of

the Table. (2) Remove Belt Cover (A) (3) Drain the Oil from machine loosening Drain Hole Screw (B) and (C)

SF. OIL

Cleaning of Filter Screens

Everytime when the oil is exchanged, the inside of Base and Filter Screens should be cleaned removing the Base. To remove the Base, take out 4 Pcs. of its Screws after draining Oil and turning machine head over. After cleaning, make Base and its Gasket be as they were before and screws shall be tightened exactly.

FITTING OF NEEDLE

Please remember that groove of needle should face always to the back side of machines.

FITTING ORDER :

(1) Turn Pulley until the needle comes to its highest position. (2) Raise Presser foot Release Lever (A) to the direction showed by arrow, and

swing Presser Foot (B) out sideways.

(3) Insert Needle into Needle Bar as far as it will go loosening Needle

Clamping Nut (C), then tighten the Nut again. At this moment the groove of needle should face to the back side of machine as stated above.

THREADING

Threading must be made correctly according to figures showed hereinafter.

In case of 1 Needle, 3 thread: A Needle thread. B Upper Looper thread. C Lower Looper thread.

Drain Hole Screw for Inner (B) ... for draining Oil inside Frame. Drain Hole Screw for Outer (C) for draining oil collected in the Opening space between between frame and body of the

machine. (4) Screw (B) and (C) must be re-tightened after draining.

(5) Feeding of new Oil.....

Filter

Screen

Base

Filter Screen

Position of Needle Thread Eyelet must be changed in case of blind hemming. Refer to "Needle thread Tension" on page 9 please.

In case of 1 Needle 2 thread with spreader A Needle Thread B Lower Looper thread.

THREAD TENSION

Tension of thread should be adjusted as loosely as possible unless the good balance is lost in the seaming. Stronger tension beyond necessity may cause the thread-breakage or skip-stitching. Note: Refer to items regarding to the thread tension in "Proper Adjustments" on page 9 please.

Pressure of Presser Foot

The pressure of Presser Foot should be adjusted most weakly so far as presser Foot can act properly. However the uniformity in the feeding and seaming will be lacked if the pressure is weak excessively. The pressure shall be strengthened when turning Adjusting Screw (C) to the direction (A) and weakened turning to (B) to the contrary.

Pressure of Presser Foot

(for Blind-Hemming Stitch)

- - - - (for Wooly Tread)

ADJUSTING OF FOOT LIFTER LEVER

Adjust Pressure Foot to Start to lift from the top face of stitch Plate turning Adjusting Screw (E) when the Foot Lifter Lever (F) is lowered in 3 mm from the end of Adjusting Screw (E) for Foot Lifter Lever Stopper (D). When Presser Foot is raised to its highest position, adjust the bottom face of it to be 4mm. from top face of Stitch Plate. At this moment Loosen Nut (I) and turn Stop Screw for Presser Foot (H) then adjust the Screw to touch with Arm of the machine.

ADJUSTING OF WIDTH OF OVEREDGE SEAM

To widen the width;

Loosen Screw (A) for upper Knife Holder and move the Holder to the

Direction (X) According to the necessity and tighten Screw (A) again.

Subsequently loosen Screw (B) for Lower Knife Holder. Then Lower Knife

Holder will move to the direction (X) by pressure of the spring inside,

consequently Lower Knife will adhere closely to Upper Knife (D) with suitable

strength. And, tighten Screw (B) again.]

To narrow the width

Loosen Screw (B) for Lower Knife Holder and Move the Holder to the

direction (Y) according to the necessity and tighten Screw (B) softly.

Subsequently, loosen Screw (B) for Lower Knife again and made Lower Knife

retighten Screw (B).

Note : For adjusting width of the overedge seam, make the blade of Upper

Knife be higher than if of Lower Knife in 0 - 1 mm.

Sharpness of Knives

Check the sharpness of knives turning Pulley manually with a thread put

between Upper and Lower Knives, after adjusting the seam of overedge

seam.

Note : When it may be necessary to sharpen knives please refer to

"Sharpening of knives for Fabric Cutting " on Page 14.

(1)

(2)

(3)

0 ~ 1mm

3mm

Thread

Main Feed Driving Eccentric (G) can be exchanged by the same manner stated as above, after removal of Nut (E) and (H) Differential Feed Bar Driving Connector (L)

In case of exchange of Eccentrics, from which dust and rubbish should be removed washing, by oil. And, assemble them making their stepped part face outside.

When Eccentric is smaller number than the one of "G" side is used at (C) side, the seam to be obtained will have a touch of loose.

ADJUSTING OF STITCH LENGTH

By the exchange of Feed Driving Eccentrics, stitch length is adjusted, Each Eccentric has a stamp showing Stitch numbers per inch. (25.4 mm) However, please pay your attention to the fact that there will be difference in some measure owing to kind or thickness of fabrics and ratio of differential feeding.

The illustration shows the view of machine set with Feed driving Eccentrics.

The Stitch Length shall be changed opening Cloth Plate (Upper) (A) and Feed Mechanism Cover (B).

The illustration shows the condition removed Eccentrics and also Socket Wrench and Eccentric Extractor. To Exchange Differential Feed Driving Eccentric only.

Remove Nut "E" by Socket Wrench (D)

Remove the Eccentric by Extractor (F) Screwed into its hole.

After, put Eccentric at need, and tighten Nut "E" As before.

Y 5 5 6 3 2 8 2 1 Y 6 6 7 3 2 8 2 2 Y 7 7 8 3 2 8 2 5 Y 8 8 9 3 2 8 2 3 Y 9 9 10.5 3 2 8 2 4

Y 1010 12 3 2 8 2 4

Y 11 11 13 3 2 8 2 4 Y 12 12 14 3 2 8 2 4 Y 13 13 15 3 2 8 2 4 Y 14 14 16.5 3 2 8 2 4

Y 15 15 18 3 2 8 2 4 Y 16 16 19 3 2 8 2 4 Y 17 17 20 3 2 8 2 4 Y 18 18 21 3 2 8 2 4 Y 19 19 22 3 2 8 2 4

Y 20 20 23.5 3 2 8 2 4 Y 22 22 26 3 2 8 2 4 Y 24 24 28 3 2 8 2 4 Y 26 26 31 3 2 8 2 4 Y 28 28 33 3 2 8 2 4

Y 30 30 35.5 3 2 8 2 4 Y 40 40 47 3 2 8 2 4 Y 50 50 59 3 2 8 2 4 Y 70 70 83 3 2 8 2 4 Y 100 100 118 3 2 8 2 4

Kind of Feed Driving Eccentrics

No. (Stamped) Stitches per inch Stitches per 30 mm. Parts No.

PROPER ADJUSTMENT

(1) TENSION OF NEEDLE THREAD

Loosening Screw (A) and lift up the Eyelet (B) for tightening of needle thread, and lower the Eyelet to loosen to the contrary.

In general overseaming, make underline of Eyelet (B) fit screw (A) as the standard manner.

In blind hemming, two threads with spreader, make upper-line of Eyelet fit Screw (A)

(2) TENSION OF LOWER LOOPER THREAD

Move Eyelet (C) to the direction (F) when it needs to tighten this thread only, and to loosen it move Eyelet to the direction (E) loosening Screw (D). On the other hand, when Looper Thread Pull-off (G) is moved to direction (F) both of upper and lower looper threads are tightened, and to direction ((E) to be loosened.

Such being the case, adjusting should be made in consideration of the goods balance of thread tension.

(3) TENSION OF UPPER LOOPER THREAD

When it needs to tighten Upper Looper thread only, move upper Looper Thread Eyelet (J) to the direction (K). To the contrary, for loosening of the said thread loosen Screw (I) and move Eyelet (J) to the direction (L)

ADJUSTING OF DIFFERENTIAL FEEDING

On machines with mark "D" on model plates, adjusting of normal differential feeding (Shrink Sewing) can be made by exchange and combination of eccentrics.

At the sewing to increase the effectiveness of differential feeding by exchange of eccentrics turn Pulley manually and confirm that differential Feed Dog will not touch with Main Feeding Dog and Stitch Plate before the operation.

When wooly thread is used:-

In case such thread which has a plenty elasticity is used, threading of Upper Looper Thread should be changed according to dotted line on the illustration (Right)

Note : When it is returned to of ordinary thread after the sewing of wooly thread, donot, forget that the threading must be changed as it was.

(4) HEIGHT OF NEEDLE

When the Needle reaches to its highest position, there should be the distance of

9.5 to 10.0mm between needle point and top face of Stitch plate.

(But 11.5 - 12.0mm for DCZ - 202)

To adjust the above distance turn the Pulley and make needle be at its highest position and then loosen screw (A) for the Needle Bar Connection Bracket which can be seen through Needle Bar Connecting Link Cover.

(4) TIMING BETWEEN NEEDLE AND UPPER LOOPER

Insert the Upper Looper to its Looper Bar(B) at the deepest, then tighten Screw (C) for the time being.

When needle begins to descend and pass in back of Upper Looper, make Upper Looper be close to Needle but without touch. And tighten Screw (C). And, when Upper looper reaches to the left end of its movement, the distance between Center of Needle and the point of the Looper must be 5 - 6mm.

To re-adjust the distance stated above, open Front Cover and remove the Looper thread Eyelet Supporter (D) and then loosen Screw (F) for Upper Looper Bar Driving Arm (E)

Note : At the tightening of Screw (F), care must be taken to make Upper Looper Bar Driving Arm (E) not to move in front or the Rear.

5 ~6mm

9.5~ 10mm

(6) TIMING BETWEEN UPPER AND LOWER LOOPERS

At the rendesvous of Upper and Lower Loopers (A,B) the point Upper Looper passes through the depression just under swelling part on back face of the Lower Looper.

It should be adjusted to be less than 0.2mm for allowance of Upper Looper against the backface of Lower Looper, and also against its swelling part.

To obtain this allowance, adjust the positioning of Lower Looper in front-rear loosening its Screw (C)

Note : After the adjusting, Screw (C) shall be tightened. But care must be given to its tightness not to be too strong because the adjusting of Lower Looper in right-left is also necessary.

(7) TIMING BETWEEN NEEDLE AND LOWER LOOPER

Distance between point of Lower Looper and Center of Needle must be 3-4mm. when Looper comes to the left end of its movement.

To obtain the distance mentioned above, Screw (C) for Lower Looper Holder will be loosened to adjust lower Looper in right and left.

As for machines of Heavy Duty, the above-mentioned distance shall be

6.5/7.5mm.

(8) POSITIONING OR NEEDLE AND LOWER LOOPER IN FRONT-REAR RELATION

As Closely as possible but without touch, the point of Lower Looper must pass behind of the Needle which is going up, and at this moment the distance between them shall be 0.05-0.1 mm in general case.

To make this adjusting, Screw (D) will be loss loosened.

0.2mm

3~4mm

0.05~0.1mm

(9) NEEDLE AND NEEDLE GUARDS

(a)

(b)

(10) SETTING AND REMOVAL OF FEED DOGS

By Screw (B) setting and removal of Differential Feed Dog (A) shall be made and by Screw (D) for main Feed Dog (C)

Auxiliary Feed Dog (E) will be removed loosening Screw (D) and (F) because it is used fitting to Main Feed Dog (C).

(11) INCLINATION AND HEIGHT OF FEED DOGS

Both top face of Feed Dog (A) and (C) must be at the same height, and run parallel with the surface of Stich Plate. Which is the standard condition of Inclination of Feed Dogs.

When Feed Dogs are at their highest position adjust the last second edge of Main Feed Dog (C) to be at 1mm. approximately higher than the top face of Stitch Plate.

This adjusting shall be made loosening Screws (B,D)

Auxiliary Feed Dog (E) must be fitted at 1-1.5mm lower than Main Feed Dog (C)

0.05mm

1mm

Stich plate

0.2mm

Needle and Needle Guard (Rear) : When the Needle which is ascending meets Lower Looper, adjust the allowance with Needle Guard (Rear) (A) to be 0-0.5 mm

The Adjusting of Needles Guard (Rear) should be made by Screw (B) for its front-Rear and right-left positioning and by loosening of Screw (C) for Highlow positioning.

Needle and Needle Guard (Front) : The allowance between Needle and Needle Guard (front) (D) shall be adjusted according to the thickness of thread in use, which is standard adjusting.

In general, however, the allowance will be adjusted in 0.2 mm. Loosening Screw (C).

(12) PARALLELISM OF FEED DOG AND STITCH PLATE

When it needs to adjust the Parallelism of Feed Dogs and stitch Plate according to conditions of the sewing, its adjusting shall be made as follows :

1) Remove Rear Cover (A)

2) Remove Cloth Plate Upper (B)

3) Remove Feed Mechanism Cover (C)

4) By the hexagonal Wrench Key (Size - 1/8") loosen Screw (D) and turn Feed

Adjusting Pin (F) by the Screw Driver (E) and adjust the parallelism.

5) After adjusting, tighten Screw (D) taking care to be no allowance between

Feed Adjusting Pin (F) and Feed Bar (G)

6) Assemble in order of (C), (B) and (A) as they were before.

(13) ADJUSTING OF KNIVES FOR FABRIC CUTTING

Height of Lower Knife;

Blade (A) of this knife be even with the top face of Stitching Plate or a little lower (0-

0.3mm) than the Plate.

Height of Upper Knife; Loosening Screw (C) when this knife reaches to the bottom of its motion, make the engagement with Lower Knife be 0.5-1.0mm

F E

0.0.3mm

0.5

~1mm

(14) EXCHANGE OF LOWER KNIFE

Lower Knife can be removed pulling it off downwards after loosening of Screw (B) To fit new Lower Knife or re-sharpened one, insert its blade from the underside and tighten screw (B)

(15) SHARPENING OF KNIVES

Upper Knife is needles to be re-shapened about one year, because this knife is made of Special Super Steel Alloy.

If sharpness of the cutting becomes blunt during the above period, resharpen Lower Knife referring to figure to the left side.

Due to aforementioned reason, it is impossible to re-sharpen Upper Knife by the ordinary Grinder, therefore, provisional one must be readied always.

When re-sharpening of Upper Knife becomes necessary, please contact with us or dealer who sold the machine to you.

The figure shows (Angle) of Upper Knife.

(16) ADJUSTING OF 2 NEEDLE 4 THREAD, OVERLOCKED STITCH MACHINES

(16-1) FITTING OF NEEDLES

Both of two needles should be set correctly facing their scarfs towards the back side of machines. Needles to be used must be those of same kind. (System Dc x 1)

7.7

1.2

2.2

(16-2) THREADING

(Machines for Light Duties)

It should be made correctly according to the figure.

A Needle Thread

(Left Needle)

B Needle Thread

(Right Thread)

C Upper Looper

Thread

D Lower Looper

Thread.

(Machines for Heavy Duties)

A Needle Thread

(Left Needle)

B Needle Thread

(Right Thread)

C Upper Looper

Thread

D Lower Looper

Thread.

-----(for Wooly Thread)

(16-3) EXCHANGE OF NEEDLE CLAMP

To Exchange Needle Clamp (... in cases of removal of Needle Bar or Exchange of Needle distance ...) Loosen Screws (B and C) and Pull Needles off, and then turn Needle Clamp (A) anti-clockwise. Tighten Needle Clamp steadily without any looseness to set it.

Adjusting of Needle and Looper shall be made according to following order as "Standard Manner"

1) Height of Needle

2) Needle Dropping.

3) Needle and Upper Looper.

4) Upper Looper and Lower Looper

5) Needle and Lower Looper.

(16-4) HEIGHT OF NEEDLES

When both Needles reach to their highest position, the distance between the left Needle Point and the top face Stitch Plate shall be 9.5 - 10mm.

(16-5) ADJUSTING OF NEEDLE DROPPING POINT

Set Lower Looper and Stop it temporarily.

And, loosen Screw, (D) for Needle Bar Connecting Bracket and decide dropping points of Needles making each allowance between their back faces and Lower Looper point be just the same.

9.5~10mm

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Revo DCZ-200-GS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual