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 1 

    

1

HOW TO USE THE THREAD TRIMMER   

 
 
 
 

■ 

Pressing the pedal with toe (position A) starts the 

machine.  Releasing the pedal (position B) stops the 
needle at the top/bottom of its stroke (adjustable with 
the motor). 

■ 

If the needle stops at the bottom of its stroke as adjusted, 

pressing the pedal with heel (position C) raises the 
needle. 
As soon as the needle stops at the top of its stroke by 
pressing the pedal with heel, the thread trimmer gets 
actuated (if the needle stops at the top of its stroke as 
adjusted, the thread trimmer gets actuated by pressing 
the pedal with heel). 

■ 

Returning the pedal to position B lowers the presser foot. 

■ 

The presser foot can be raised or lowered freely by releasing the pedal (position B) or 

pressing the pedal with heel (position C) until the pedal is placed at position A for the 
next sewing operation after the threads are cut. 

 
 
 

2

INSTALLING THE POSITION DETECTOR   

 

■ 

Install position detector A and tighten screw B 

temporarily. 

■ 

Fit positioner bar C onto the guide groove of the position 

detector.    Then tighten screw D. 

■ 

Turn on the motor. 

 
 
 
 
 

■ 

Press the pedal with heel after two to three stitches are 

formed by pressing the pedal with toe. 
Then the needle stops. 

■ 

Loosen screws B for the position detector. 

Turn the machine pulley while checking that the 
position of screws B is not shifted.  Align mark P on 
handwheel E with the alignment mark on the arm. 
Then the needle bar is at the top of its stroke. 
Tighten screws B to secure the position detector. 

■ 

Check to see if the needle bar stops at the top of its 

stroke by pressing and then releasing the pedal. 

 
 

< Note > 
Do not use this thread trimmer with no fabric under the presser foot.

 

< Note > 

Remove the connector for the thread trimmer cylinder. 

Make sure the knife is retracted all the way. 

 

 

 

Содержание RX/UTC Series

Страница 1: ...UCTION INSTRUCTION INSTRUCTION RX UTC MANUAL Industrial Industrial Industrial Industrial Sewing Sewing Sewing Sewing Machines Machines Machines Machines First published September 1991 Eighth edition July 2001 No 010086 ...

Страница 2: ...cial s RX UTC Series Read and study this instruction manual carefully before beginning any of the procedures and save it for later use This instruction manual describes adjustments and maintenance procedures for the thread trimmer Refer to the RX Series instruction manual for other information ...

Страница 3: ...5 9 Looper thread clamp spring pressure 5 6 ADJUSTING THE THREAD RELEASER 6 1 Thread releaser block 6 6 2 Thread releaser connection plate 6 6 3 Thread releaser lever 6 6 4 Thread releaser plate 7 6 5 Thread releaser hook 7 7 SAFETY DETECTOR 7 8 ADJUSTING THE SPEED CONTROLLER AND AIR PRESSURE 8 9 THREAD WIPER ADJUSTMENT 8 10 ADJUSTING THE PRESSER FOOT LIFT 9 11 ADJUSTING THE TOP COVER THREAD TRIMM...

Страница 4: ...laced at position A for the next sewing operation after the threads are cut 2 INSTALLING THE POSITION DETECTOR Install position detector A and tighten screw B temporarily Fit positioner bar C onto the guide groove of the position detector Then tighten screw D Turn on the motor Press the pedal with heel after two to three stitches are formed by pressing the pedal with toe Then the needle stops Loos...

Страница 5: ... be approximately 26mm clearance between ring G and bracket D 4 ADJUSTING THE THREAD TRIMMER SOLENOID 4 4 4 4 1 Solenoid stroke 1 Solenoid stroke 1 Solenoid stroke 1 Solenoid stroke The stroke of the solenoid should be approximately 15mm To adjust this stroke remove rubber cover F and loosen nut A Set the clearance between rubber cushion B and the rear end of the solenoid at 15mm To position shaft...

Страница 6: ...per thread clamp spring is simultaneously loosened 5 5 5 5 2 Ad 2 Ad 2 Ad 2 Adjusting the looper thread clamp spring justing the looper thread clamp spring justing the looper thread clamp spring justing the looper thread clamp spring Position of looper thread clamp spring D so that the part a 1 of movable knife and the part d 1 of looper thread clamp spring are on the same plane And adjust it will...

Страница 7: ...f its travel there should be a distance of 22mm from the center of the needle bar to the point of movable knife A To make the above adjustments remove pin S and make a fine left to right adjustment on movable knife driver lever M by turning screw T 5 5 5 5 6 Adjusting the movable knife front to back 6 Adjusting the movable knife front to back 6 Adjusting the movable knife front to back 6 Adjusting...

Страница 8: ...art the machine Movable knife A should enter needle thread loops B Cutting edge C for the looper thread should pass looper thread D When the movable knife is returning home the needle threads and looper thread are pulled to the right by cutting edges E and F and cut by the stationary knife 5 5 5 5 9 Looper thread clamp spring pressure 9 Looper thread clamp spring pressure 9 Looper thread clamp spr...

Страница 9: ...er connection plate 2 Thread releaser connection plate 2 Thread releaser connection plate 2 Thread releaser connection plate Fit thread releaser connection plate D to guide screw E Create a clearance between plate D and thread releaser connection lever G Adjustment is made by loosening screw H 6 6 6 6 3 Thread releaser lever 3 Thread releaser lever 3 Thread releaser lever 3 Thread releaser lever P...

Страница 10: ...le thread should not protrude long from the underside of the fabric at the start of sewing Loosen screw I and adjust thread releaser hook J To decrease the amount of the thread supplied by the thread take up raise the thread releaser hook To increase the amount lower the thread releaser hook If the amount is too little the stitches cannot be formed at the start of sewing 7 SAFETY DETECTOR The safe...

Страница 11: ...stopper ring D 2 Secure shaft F with screw G There should be 1mm clearance between lever B and secure shaft F 3 Position thread wiper K with screw H The distance between the left end of the thread wiper and the center of the needle bar should be approximately 19mm when the thread wiper is all the way to the left and clearance between the needle center and point P of the thread wiper should be appr...

Страница 12: ...5 1mm Pneumatic presser foot lift When the cylinder gets actuated the presser foot should be 6mm or 7mm above the top surface of the needle plate Position stopper E so that lever G cannot be lowered Then secure stopper E with nut F Electric presser foot lift When plunger H moves in direction of J the presser foot should be 6mm or 7mm above the top surface of the needle plate Adjust by using chain ...

Страница 13: ...the movable knife refer to 11 6 11 11 11 11 2 Adjusting the top cover thread clamp spring 2 Adjusting the top cover thread clamp spring 2 Adjusting the top cover thread clamp spring 2 Adjusting the top cover thread clamp spring Top cover thread clamp spring G should protrude approximately 3mm from end F of the stationary knife Loosen screws I and adjust spring G while checking spring G is parallel...

Страница 14: ... should hook the top cover thread when the movable knife returns home Loosen screws J on movable knife installation base I Set the clearance between hook end D of movable knife C and the top cover thread at approximately 1mm 11 11 11 11 6 Adjusting the height of the movable knife 6 Adjusting the height of the movable knife 6 Adjusting the height of the movable knife 6 Adjusting the height of the m...

Страница 15: ...acket D To decrease the pressure move down bracket D The pressure of spring F should be as light as possible yet be sufficient to return the movable knife home correctly when the solenoid gets actuated 11 11 11 11 8 Adjusting the top cover thread releaser hook 8 Adjusting the top cover thread releaser hook 8 Adjusting the top cover thread releaser hook 8 Adjusting the top cover thread releaser hoo...

Страница 16: ... PNEUMATIC DEVICES 12 12 12 12 1 RX9800 1 RX9800 1 RX9800 1 RX9800 Connect air lines and cords by referring to the illustration below and the parts list 12 12 12 12 2 RX9800ALK 2 RX9800ALK 2 RX9800ALK 2 RX9800ALK PHK PHK PHK PHK ...

Страница 17: ...14 12 12 12 12 3 RX9800PLK 3 RX9800PLK 3 RX9800PLK 3 RX9800PLK 13 WIRING AND PIPING FOR ELECTRIC DEVICES ...

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