Manuale d’uso / di manutenzione del prodotto Z-8550A del fabbricante Brother
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Z-8550A Z-8560A Please read this manual before making any adjustments. ELECTRONIC DIRECT DRIVE ZIGZAG LOCK STITCHER ELECTRONIC DIRECT DRIVE ZIGZAG LOCK STITCHER WITH THREAD TRIMMER SER VICE MANUAL.
Z-8550A, 8560A This service manual is intended for Z-8550A, Z-8560A; be sure to read the Z-8550A, Z-8560A instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” and the who le of this manual to underst and this p roduct before you start maintenance.
Z-8550A, 8560A i SAFETY INSTRUCTIONS [1] Safety indications and their meanings This service manual and the indications and symbols that are used on the machine itself ar e provided in order to ensure safe operation of this machine and to prevent acci dents and injury to y ourself or other people.
Z-8550A, 8560A ii [2] Notes on safety DANGER Wait at least 5 minutes after turning off the pow er swit ch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury.
Z-8550A, 8560A iii CAUTION Sewing This sewing machine should only be used by operators who have received the necessary training in safe use beforehand. The sewing machine should not be used for any applications other than sewing. Be sure to wear protective goggles when using the machine.
Z-8550A, 8560A iv CAUTION Maintenance and inspection Maintenance and inspection of the sew ing machine should only be carried out by a qualified technician. Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.
Z-8550A, 8560A v 4 Direction of operation 5 If the actuator is press ed by mistake when using the correction sewing function, the needle will move in a zigzag motion while the machine is operating, and injury may result. 6 Do not touch the thread takeup or the knife, otherwise injury may result.
Z-8550A, 8560A CONTENTS 1. MACHINE SPEC IFICATIONS............... 1 2. SEWING PATTERN .............................. 2 3. FUNCTION SETTINGS ......................... 3 3-1. Setting memory switches.................................. 3 3-2. List of memory switch settings .
Z-8550A, 8560A 9. ADJUS TMENTS ................................... 67 9-1. Actuator position ............................................... 67 9-2. Adjusting the safe ty switch position .................. 68 9-3. Thread tens ion spri ng .............
Z-8550A, 8560A 1. MA CHINE SPECIFICATIONS 1 1. MACHINE SPECIFICA TIONS 8550A 8560A 0 A 3 Thread trimmer - - c Upper thread feeding device - - c Back tack/condense device *1 - c c 8550A 8560A SPECIFICATIONS -031, -A31 -331 Use For light-weight to medium-w eight materials Max.
Z-8550A, 8560A 2. SEWING PA TTERN 2 2. SEWING P A TTERN • This sewing machine is equipped with the following built-in se wing patterns. Select the p a ttern number from the operation panel to use a pattern.(Refer to “6-2-2. Setting the sew ing pattern” of the instruction manual.
Z-8550A, 8560A 3. FUNCTION SETTINGS 3 3. FUNCTION SETTINGS 3-1. Setting memory switches • If the icon (1) on the LOCK key is on, release the lock before carry ing out the following operations. • If the icon (2) on the MAX key is on, pre ss the MAX key to return the main display to the stitch number display (orange).
Z-8550A, 8560A 3. FUNCTION SETTINGS 4 3-2. List of memory switch settings Memory switch No . 0 - 15 No. Initial value Setting range Setting details 0 0 (degrees) -10 - 10 (degrees) Needle up stop posi.
Z-8550A, 8560A 3. FUNCTION SETTINGS 5 Memory switch No . 16 - 30 No. Initial value Setting range Setting details 16 3 (minutes) 0 - 30 (minutes) Overtime function 0: None 1-30: After continuous operation for t he set length of time, operation stops and [Err 190] is displayed.
Z-8550A, 8560A 3. FUNCTION SETTINGS 6 Memory switch No . 31 - 46 No. Initial value Setting range Setting details 31 0 0 - 1 Stopping while start backtacking is in progress, and speed during start back.
Z-8550A, 8560A 3. FUNCTION SETTINGS 7 Memory switch No . 47 - 60 No. Initial value Setting range Setting details 47 0 0 - 1 Operation during st anding operation when AUTO function is on 0: When high-speed pedal turns on, se wi ng is momentarily stopped, and it is resumed when pedal turns off.
Z-8550A, 8560A 3. FUNCTION SETTINGS 8 Memory switch No . 68 - 69 No. Initial value Setting range Setting details 68 0 0 - 1 Seam matching function during automatic backtacking (Used when y ou would like seams to be accurately matched when using automatic backtacking; No.
Z-8550A, 8560A 3. FUNCTION SETTINGS 9 Memory switch No . 80 - 88 No. Initial value Setting range Setting details 80* 0 -7 - 7 Backward depression on (thread trimming) point for treadle 81* 0 -5 - 5 Ba.
Z-8550A, 8560A 3. FUNCTION SETTINGS 10 Memory switch No . 90 - 110 No. Initial value Setting range Setting details 90 160 (rpm) 150 - INCH (rpm) Thread trimming speed (TRIM) 91 220 (rpm) 150 - 300 (rpm) Low speed (INCH) 92 1400 (rpm) 500 - 2500 (rpm) Stop improvement position (POS) [Do not change this setting.
Z-8550A, 8560A 3. FUNCTION SETTINGS 11 Memory switch No . 111 - 123 No. Initial value Setting range Setting details 111 1000 (rpm) 500 - 2000 Limit speed for sewing patterns w ith changed sew ing pitch (T stitches) Needle lifting and needle lowering are carried out at low speed w hen No.
Z-8550A, 8560A 3. FUNCTION SETTINGS 12 Memory switch No . 125 - 148 No. Initial value Setting range Setting details 125 0 0 - 1 Servo lock operation 0: None 1: When stopped 2: When presser foot liftin.
Z-8550A, 8560A 3. FUNCTION SETTINGS 13 Memory switch No . 132 - 135 The following memory sw itch numbers are used for displaying maintenance information. No. Explanation of display details 132 Cumulative pow er on time (Actual time = Displayed time x 10 hours) 133 Cumulative running time (Actual time = Display xxxx x 10 hours) 135 ROM version (x.
Z-8550A, 8560A 3. FUNCTION SETTINGS 14 3-3. Data initialization Initialization of memory data refers to returning all oper ation panel setting data (inclu di ng data that has been set using memory sw itches) to the factory default settings.
Z-8550A, 8560A 3. FUNCTION SETTINGS 15 <Initialization of memory s w itch setting data only > 1 While holding down the FUNC key on the operat ion panel, turn on the power sw itch (1). 2 The memory switch setting data w ill be initialized. After this, operation panel and treadle operation will be possible.
Z-8550A, 8560A 3. FUNCTION SETTINGS 16 3-3-2. When data is initialized automatically All setting data will be initialized autom atically at the follow ing times.
Z-8550A, 8560A 3. FUNCTION SETTINGS 17 3-4. Error history checking method 3-4-1. Error history checking method The past error history can be che cked by the follow ing procedure. 1 While holding down the TEST key on the operat ion panel, turn on the power sw itch (1).
Z-8550A, 8560A 3. FUNCTION SETTINGS 18 3-4-2. Error history display examples Setting items Main display (1) Main display (2) If there is no error history [000] [E---] Error [E110] is displayed first. [001] [E110] 3-5. Software version checking method 3-5-1.
Z-8550A, 8560A 3. FUNCTION SETTINGS 19 3-6. Checking input and output Use this to check for any malfunctions of the operation panel keys, circuit boards or sensors, and fo r checking for broken cords and for adjusting sensor positions. You can check whether the CPU is correctly reading the signals from keys and sensors.
Z-8550A, 8560A 3. FUNCTION SETTINGS 20 Treadle unit and standing ope ration pedal operation Operation block Operation panel indicator block Forward depression - ON Plain zigzag LED Forward depression ON signal position Depress the treadle unit forward.
Z-8550A, 8560A 3. FUNCTION SETTINGS 21 3-7. DIP switch setting method DANGER Wait at least 5 minutes after turning off the power sw itch and disconnecting the power cord from the w all outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.
Z-8550A, 8560A 3. FUNCTION SETTINGS 22 3-8. Needle zigzag home position adjustment procedure OPERA TION PROCEDURE 1 While pressing the [zigzag width/zigzag reference line posit ion] key on th e operation panel, turn on the pow er switch (1).
Z-8550A, 8560A 4. USING CF CA RDS 23 4. USING CF CARDS 4-1. Precautions when handling CF cards (commercially available) • Use CF cards with a capacity of 32, 64, 128 or 256 MB. • Do not attempt to disassemble or modify the CF cards. • Do not forcibly bend, drop or scratch CF cards or place heavy objects on top of them.
Z-8550A, 8560A 4. USING CF CARDS 24 4-3. Preparation for reading/writing data 1 With the power turned off, insert the CF card into the CF slot. NOTE: • Make sure the CF card is facing the correct way . • Always be sure to keep the cover closed except w hen inserting and removing the CF card.
Z-8550A, 8560A 4. USING CF CA RDS 25 4-4. Reading additional sewing data into the sewing machine 1 Carry out steps 1 to 3 in “4-3. Preparation for reading/writing data”. 2 Select [r 1] in CF data read/write mode. 3 4 Select the program number s to be read (ALL, 1-99).
Z-8550A, 8560A 4. USING CF CARDS 26 4-5. Writing additional sewing data to CF cards 1 Carry out steps 1 to 3 in “4-3. Preparation for reading/writing data”. 2 Select [w 2] in CF data read/w rite mode. 3 4 Select the program numbers to be w ritten (ALL, 1 - 99).
Z-8550A, 8560A 4. USING CF CA RDS 27 4-6. Reading memory switch data into the sewing machine 1 Carry out steps 1 to 3 in “4-3. Preparation for reading/writing data”.
Z-8550A, 8560A 4. USING CF CARDS 28 4- 7 . Writing memory switch data to a CF card 1 Carry out steps 1 to 3 in “4-3. Preparation for reading/writing data”. 2 Select [w 4] in CF data read/w rite mode. 3 The buzzer will sound and the memory sw itch data will be copied from the internal memory onto the CF card.
Z-8550A, 8560A 4. USING CF CA RDS 29 4-8. Updating the control program version 4-8-1. Control program version updating procedure 1 Carry out steps 1 to 3 in “4-3.
Z-8550A, 8560A 4. USING CF CARDS 30 4-8-2. Restoring the control program if an error occurs during version updating If the version updating did not complete normally, such as because of a pow er outage, the se wing machine will not operate correctly. If this happens, restore the control pr ogram by the follow ing procedure.
Z-8550A, 8560A 4. USING CF CA RDS 31 4-9. Writing error log data to CF cards 1 Carry out steps 1 to 3 in “4-3. Preparation for reading/writing data”. 2 Select [w 8] in CF data read/w rite mode. 3 The buzzer will sound and the error log data will be copied from the internal memory onto the CF card.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 32 5. MECHANICAL DESCRIPTIONS Each mechanism operates in the order of the numbers show n in the illustration. * <number> and [number] indicate the flow of oper ations that occur separ ately from each other.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 33 5-2. Lower shaft and shuttle race mechanisms 1. プーリ 2. モータ 1. Motor 2. Upper shaft 3. T iming pulley U 4. Timing belt 5. T iming pulley D 6. Lower shaft 7. Bevel gear 8. Bevel gear 9. Rotary hook driving shaft 10.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 34 5-3. Zigzag mechanism 1. Pulse motor 2. Motor lever 3. Zigzag connecting rod 4. Zigzag joint 5. Needle bar base 6.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 35 5-4. Presser foot mechanism 1. Presser adjusting screw 2. Presser bar spring 3. Presser bar 4. Presser foot 1. Knee lifter 2. Knee lifter shaft 3. Knee lifter complying bar assembly 4. Knee lifter bar 5. Knee lifter lever 6.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 36 1. Lifting lever 2. Presser bar lifter lever 3. Presser bar bracket 4. Presser bar 5. Presser foot <For options> 1.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 37 5-5. Feed mechanism [Forw ard/back movement] 1. Lower shaft 7. Feed rocker bracket arm 2. Level feed eccentric wheel 8. Feed bar 3. Feed driving connecting rod 9. Feed dog (forward/back movement) 4. Side connecting rod 5.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 38 <Dial feed mechanism> 1. Stitch length dial 5 2. Feed regulator 3. Connecting rod U 4. Feed adjusting lever U 5. Connecting rod D 6. Feed adjusting lever D 7. Feed regulator shaft 8. Feed connecting lever 9.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 39 <Backtacking mechanism> Adjusting the condense dial changes the angle of the feed regulator when the reverse stitching lever is pushed down. When the condense dial is aligned with the - side scale, the angle of the feed regulator increases and feed is reversed.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 40 5-6. Lubrication mechanism ： F low of oil 1. Oil feeding 2. Oil tank 3. Plunger pump <3> Oil gauge window 4.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 41 ： F low of oil 1. Plunger pump 2. Rotary hook shaft bush 3. Rotary hook shaft <3> Adjusting screw 4.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 42 5-7. Thread trimmer mechanism (8560A only) 1. Thread trimmer solenoid 2. Solenoid joint 3. Solenoid lever 4. Driving rod 5. Thread trimmer driving rod plate 6. Main lever assembly 7. Roller 8. Thread trimmer cam 9.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 43 5-8. Tension release mechanism 1. Lifting lever <1> Knee lifter connecting rod (Press the knee switch.) 2. Presser bar lifter lever 3. Tension release plate 4. Tension release stud 5. Tension release pin (Press the tension disc presser.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 44 <During thread trimming (8560A only)> 1. Solenoid 2. Link 3. Lever B 4. Lever A 5. Tension release connecting rod 6. Tension release plate 7. Tension release stud 8. Tension release pin <Upper thread feeding mechanism (8560A only)> 1.
5. MECHA NICAL DESCRIPTIONS Z-8550A, 8560A 45 5-9. Thread wiper mechanism (8560A only, optional device) 1. Thread wiper solenoid 2. Thread wiper rod 3.
6. DISA SSEMBL Y Z-8550A, 8560A 46 6. DISASSEMBL Y DANGER Wait at least 5 minutes after turning off the power sw itch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages ar e present can result in severe injury.
6. DISA SSEMBL Y Z-8550A, 8560A 47 Disassemble the parts in the order shown in the illustration. * (number) indicates only the names of parts. ( It does not indicate the disassembly order.) 6-1. Covers 1. Screw (Loosen) 10. F lat screws [7 pcs] 2. Needle 11.
6. DISA SSEMBL Y Z-8550A, 8560A 48 6-2. Presser foot mechanism 1. Screw 2. Presser foot 3. Adjusting screw nut (Loosen) 4. Presser adjusting screw 5. Spring guide 6. Spring 7. Spring guide collar 8. Screw (Loosen) 9. Presser bar bracket 10. Presser bar 6-3.
6. DISA SSEMBL Y Z-8550A, 8560A 49 6-4. Zigzag mechanism <For the 8560A> Remove the solenoid before doing this. (1) Screws [3 pcs] (2) Shoulder screw 1.
6. DISA SSEMBL Y Z-8550A, 8560A 50 3. Screw 10. Set screw (Loosen) 4. Screw 11. Needle bar base guide R 5. Bolt (Loosen) 12. Set screw (Loosen) 6. Zigzag joint 13. Needle bar base guide pin (Loosen) (Pull out in the direction of the arrow.) 14. Needle bar base 7.
6. DISA SSEMBL Y Z-8550A, 8560A 51 6-5. Rotary hook mechanism 1. Slide plate (8550A) <1> Knife unit (8560A) 2. Flat screws [2 pcs] 3. Needle plate 4. Flat screws [2 pcs] 5. Auxiliary needle plate 6. Screws [2 pcs] 7. Feed dog 8. Scew 9. Bobbin case holder position bracket 10.
6. DISA SSEMBL Y Z-8550A, 8560A 52 6-6. Lubrication mechanism 1. Screw (Drain the oil from inside the gearbox.) 2. Screws [9 pcs] 3. Bed bottom cover assembly 4. Bottom cover packing 6-7. Feed mechanism 1. Screw (Loosen) (1) Set screw collar 2. Set screws [2 pcs] (Loosen) (2) Feed rocker arm 3.
6. DISA SSEMBL Y Z-8550A, 8560A 53 6-8. Thread trimmer mechanism (8560A only) 1. Shoulder screw [2 pcs] 2. Knife driving rod 3. Washer 4. Screws [3 pcs] 5. Thread trimmer solenoid assembly <Knife unit> 1. Screws [4 pcs] 2. Knife holder 3. Movable knife 4.
6. DISA SSEMBL Y Z-8550A, 8560A 54 6-9. Thread wiper mechanism (8560A only, optional device) 1. Screw 2. Presser foot 3. Screw 4. Solenoid cover 5. Retaining ring 6. Washer 7. Screws [2 pcs] 8. Screw 9. Bolt 10. Wiper bracket 11. Screw s [2 pcs] 12. Thread wiper base 13.
7. A SSEMBL Y Z-8550A, 8560A 55 7. ASSEMBL Y Assemble each part in the order shown in the illustration. * (number) indicates only the names of parts. (It does not indicate the assembly order.) IMPORTANT: Be sure to apply grease in the required location s w hen reassembling, and also o nce every two years.
7. A SSEMBL Y Z-8550A, 8560A 56 7-2. Feed mechanism 1. Feed lifting link 2. Feed bar set 3. Feed rocker shaft (Insert from the left all the way to the right.) (1) Spacer (2) Bush L (3) Feed rocker shaft (4) Retaining ring 4. Set screw collar 5. Set screws [2 pcs] 6.
7. A SSEMBL Y Z-8550A, 8560A 57 7-3. Lubrication mechanism 1. Bottom cover packing 2. Bed bottom cover assembly 3. Screws [9 pcs] 4. Screw 5. (Add lubricating oil [approx.
7. A SSEMBL Y Z-8550A, 8560A 58 7-4. Zigzag mechanism 1. Needle bar base 8. Wick (With needle bar base guide pin inserted) (Pull in oil tank.) 2. Needle bar base guide R 9. Wick (ring) 3. Set screw (Pass the shaft through the ring.) 4. Needle bar base guide pin 10.
7. A SSEMBL Y Z-8550A, 8560A 59 7-5. Needle bar mechanism 1. Needle bar connecting rod 2. Needle bar connecting rod shaft 3. Screws [2 pcs] 4. Needle bar clamp (1) Thread take-up crank (2) Felt 5. Needle bar 6. Screw (Temporarily tighten) 7. Thread guide 8.
7. A SSEMBL Y Z-8550A, 8560A 60 7-6. Rotary hook mechanism 1. Needle 2. Screw 3. Rotary hook 4. Set screws [2 pcs] (Temporarily tighten) 5. Bobbin case holder position bracket 6. Screw (Temporarily tighten) 7. Feed dog 8. Screws [2 pcs] (Temporarily tighten) 9.
7. A SSEMBL Y Z-8550A, 8560A 61 7-7. Presser foot mechanism 1. Presser bar 2. Presser bar bracket 3. Screw (Temporarily tighten) 4. Spring guide collar 5. Presser bar spring 6. Spring guide 7. Presser adjusting screw 8. Adjusting screw nut 9. Lifting lever (Lift up) 10.
7. A SSEMBL Y Z-8550A, 8560A 62 7-8. Covers 1. Window plate (8550A) 10. Thread guide 2. Pulse motor cover 11. Flat screw 3. Screws [3 pcs] 12. Rotary take-up mounting plate 4. Panel 13. Rotary thread take-up lever 5. Rear cover 14. Flat screws [3 pcs] 6.
7. A SSEMBL Y Z-8550A, 8560A 63 7-9. Thread wiper mechanism (8560A only, optional device) 1. Thread wiper base 2. Screws [2 pcs] 3. Solenoid setting plate 4. Screws [2 pcs] 5. Wiper bracket 6. Bolt 7. Washer 8. Retaining ring 9. Presser foot 10. Screw 11.
8. CHA NGING THE FEED AMOUNT TO LONG ST ITCH SPECIFICA TIONS (from 2.0mm to 5.0mm) Z-8550A, 8560A 64 8. CHANGING THE FEED AMOUNT TO LONG STITCH SPECIFICA TIONS (from 2.0mm to 5.0mm) CAUTION Replacement of parts should only be ca rried out by a qualified technician.
8. CHA NGING THE FEED AMOUNT TO LONG STITCH SPECIFICA TIONS (from 2.0mm to 5.0mm) Z-8550A, 8560A 65 5. Turn the stitch length dial (7) and the condense dial (8) to the maximum feed amount fo r the feed dog being used. (Set the condense dial (8 ) to a negative number.
8. CHA NGING THE FEED AMOUNT TO LONG ST ITCH SPECIFICA TIONS (from 2.0mm to 5.0mm) Z-8550A, 8560A 66 9. For sewing machine models a nd specificatio ns other than 8550A-031, push the reverse stit ching.
Z-8550A, 8560A 9. A DJUSTMENTS 67 9 . ADJUSTMENTS CAUTION Maintenance and inspection of the sewing machine should only be carried out by a qualified technician. Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.
Z-8550A, 8560A 9. A DJUSTMENTS 68 9-2. Adjusting the safety switch position The safety switch (1) is normally installed as shown in figure [A]. However, if the processing me thod used for the table leaves too much space between the machine bed and the table ho le, it may adversely affect the operat ion of the safety sw itch (1).
Z-8550A, 8560A 9. A DJUSTMENTS 69 9-3. Thread tension spring <Thread tension spring position> The standard position of the thr ead tension spring (1) is 5-8 mm above the surface of the thread guide (3) when the presser foot (2) is lowered. 1. Lower the presser foot (2).
Z-8550A, 8560A 9. A DJUSTMENTS 70 9-4. Presser foot height The standard height of the presser foot (1) is 6 mm w hen the presser foot (1) is raised by means of the lifting lever (2). 1. Loosen the t wo screws (3) and then remove the thread take-up guard (4).
Z-8550A, 8560A 9. A DJUSTMENTS 71 0141B 0140B 9-6. Feed dog angle The standard angle for the feed dog (1) is for the top of the needle plate to be parallel with the top of the feed dog (1) (for the 85.
Z-8550A, 8560A 9. A DJUSTMENTS 72 9-8. Feed amounts for reverse stitching and condense stitching The feed amounts for reverse stitching and condense stitching are set using the condense dial (1). If the stitch length for the fini shed stitches diff ers greatly fro m the scale, carry out the following adjustment.
Z-8550A, 8560A 9. A DJUSTMENTS 73 9-10. Needle bar height With the accessory needle bar height gauge (2) installed to the needle bar (1), adjust so that the needle bar height gauge (2) is touching the top of the needle plate (3) when the needle bar (1) is at its low est position.
Z-8550A, 8560A 9. A DJUSTMENTS 74 9-11. Needle zigzag forward/back position Adjust so that the following are obtained. • The needle is in the center of the needle hole in the forward/back direction. • T here is no play in the needle bar in the forward/back direction.
Z-8550A, 8560A 9. A DJUSTMENTS 75 9-12. Needle zigzag sideways position Adjust the position of the needle so that it is in about th e center of the slot in the needle hole when the power is turned on and the zigzag width and zigzag base line position have both been set to 0 mm at the operation panel.
Z-8550A, 8560A 9. A DJUSTMENTS 76 9-13. Needle zigzag load This adjusts the resistance load for needle zigzagging. 1. Turn off the power switch. 2. Loosen the nut (1). 3. Tighten the screw (2) to increase the needle zigzag load. * Adjust so that the l oad is 12-15 N.
Z-8550A, 8560A 9. A DJUSTMENTS 77 4. Remove the presser foot (3), needle plate (4), auxiliary needle plate (5), feed dog (6) and needle plate spacer (7) (8560A only).
Z-8550A, 8560A 9. A DJUSTMENTS 78 9-16. Adjusting the rotary hook lubrication amount CAUTION Be careful not to touch y our fingers or the lubrication amount check sheet against moving parts such as the rotary hook or the feed mechanism w hen checki ng the amount of oil supplied to the ro tary hook.
Z-8550A, 8560A 9. A DJUSTMENTS 79 9-17. Adjusting the presser foot floating amount (minute lifting amount) When sewing stretch materials and materials with long pile, you can make minute adjustment s to the floating amount for the presser foot (1) in accordance with the material.
Z-8550A, 8560A 9. A DJUSTMENTS 80 9-19. Adjusting the quick reverse device (8550A-A31, 8560A) Adjust so that the plunger rubber (3) touches the bottom of the quick reverse solenoid (2) when the reverse stitching lever (1) is lowered to its low est position w hile the feed amount is at the maximum setting.
Z-8550A, 8560A 9. A DJUSTMENTS 81 9-20. Adjusting the tension release during thread trimming (8560A only) <a> : 6-7mm <b> : 0.2-1.0mm The tension release mechanism operates during thread trimming.
Z-8550A, 8560A 9. A DJUSTMENTS 82 9-21. Adjusting the position of the thread trimming cam (8560A only) The knife unit (1) should already be installed in the correct way when the follow ing adjustments are carried out. <Horizontal position adjustment> 1.
Z-8550A, 8560A 9. A DJUSTMENTS 83 9-22. Adjusting the tension of the plate spring (8560A only) Adjust the tension of the plate spring (1) so that the tension is 0.03 to 0.11 N when the plate spring (1) is pulling the lower thread (nylon thread: 100D 1 X 3 (Z)) after thread trimming.
Z-8550A, 8560A 9. A DJUSTMENTS 84 <Adjusting the upper thread trailing amount> The standard trailing length fo r the upper thread is 50-60 mm. If adjustment is necessary, adjust the positi on of the wire e as described below. 1. Loosen the set screw (1).
Z-8550A, 8560A 10. A PPLYING GREA SE (When “G r EA SEUP” appears ) 85 1 0 . APPL YING GREASE (When “GrEASEUP” appears) If “GrEASEUP” flashes on the main display (1) and a buzzer sounds when the power switch is turned on, it means that grease needs to be applied.
Z-8550A, 8560A 10. A PPLYING GREASE (When “G r EA SEUP” appears) 86 10-2 . Applying grease Use Brother-specified <GREASE (SA2355-001)>. 1. Using the tube 2. Applying grease 1. Turn the power switch to “OFF”. 2. Apply grease in the places indicated by arrow s [A] to [G] below.
Z-8550A, 8560A 10. A PPLYING GREA SE (When “G r EA SEUP” appears ) 87 After applying grease in the places indicated by arrow s [A ] to [G] above, carry out the reset operation described below.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 88 11. ELECTRICAL MECHANISM DANGER Wait at least 5 minutes after turning off the power sw itch and disconnecting the power cord from the w all outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 89 11-2 . Control box internal configuration Main P .C. board Secured to the side. This is the P .C. boar d that controls sewi ng machine operation. There is 1 fuse on this P .C. board. PMD P .C. board Secured to the base plate.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 90 11-3 . Description of fuses 11-3-1. Power supply P .C. board (fuses and fuse resistors) When replacing the fuses and fuse resistors, be sure to use the parts specified below . If the components on the P .C.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 91 11-3-2 . Main P .C. board (fuses and fuse resistors) No. Part name Parts code Symptom w hen fuse blows F Fuse 8A (Glass tube fuse 8A-250V) J04502-001 [Err 790] is displayed when the sew ing machine starts. R25 Fuse resistor 1/2W 0.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 92 11-4. Description of connectors A large number of problems are often caused by connectors that are not inserted corre ctly or w hich are contacting poorly .
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 93 Pow er supply P.C. board 0165B.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 94 11-5. T roubleshooting 11-5-1. T roubleshooting procedure Carry out troubleshooting by follo wing the procedure given below . 1 Checking connectors With the power turned of f, check that a ll connectors are securely inserted w hile referring to “1 1-4.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 95 11-5-2. Diagnosis flowchart Description of symbols Switch operation Setting and status Judgment OFF Powe r switch OFF Refer to the corresponding “Problem No.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 96 0304B.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 97 11-5-3. Remedy If a problem No. is reached while carrying out the diagnosis steps in “11-5-2. Diagnosis flow chart”, refer to the table for the corresponding number.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 98 Cause Inspection/Remedy/Adjustment Replacement if a malfunction 5. When [Err 91] is displayed: Problem with treadle unit settings Repeat the standard settings for the treadle unit. (Refer to “12-3. Standard settings for treadle depression stroke”.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 99 Problem No. 4, 5, 6, 7 Needle bar does not move to the home position and an error code is displayed when the power sw itch is turned on.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 100 Problem No. 11 Error code is displayed w hile sewing machine is operating. Cause Inspection/Remedy/Adjustment Replacement if a malfunction When [Err 710] is displayed w hile sewing machine is operating: Abnormal current detected in sewing machine motor (Replace the part(s) indicated at right.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 101 11-6. Wiring diagrams 0124B.
1 1. ELECTRICAL MECHA NISM Z-8550A, 8560A 102 0125B.
Z-8550A, 8560A 12. TREA DLE UNIT 103 12. TREADLE UNIT 12-1 . Types • T wo types of treadle unit are available: a type which controls the automatic presser foot lifter and a type which does not control it.
Z-8550A, 8560A 12. TREA DLE UNIT 104 12-2. Standard setting values SPECIFICATIONS Treadle unit -G Treadle unit -H Operation Automatic presser foot lifting does not occur Automatic pre sser foot liftin.
Z-8550A, 8560A 12. TREA DLE UNIT 105 12-3. Standard settings for treadle depression stroke DANGER Wait at least 5 minutes after turning off the power sw itch and disconnecting the power cord from the w all outlet before opening the cover of the control box.
Z-8550A, 8560A 12. TREA DLE UNIT 106 3) Storing the neutral position Press the straight stitch key (2 ) w hile your foot is released from the treadle. “Pdrr x.
Z-8550A, 8560A 13. STA NDING OPERATION PEDA L 107 13. ST ANDING OPERA TION PEDAL The CDD foot plug assembly (J04099-001, sold separately) is required. <Related table parts> Part name Code No.
Z-8550A, 8560A 13. STA NDING OPERATION PEDA L 108 13-2. Connectors <At foot plug> <At pedals> <A> Two-step pedal <B> Variable speed pedal Standing operation pedal No.
Z-8550A, 8560A 14. TROUBLESHOOTING 109 14. TROUBLESHOOTING • Please check the following points befor e calling for repairs or service. • If the following remedies do not fix the problem, turn off the power sw itch and consult a qualif ied technician or the place of purchase.
Z-8550A, 8560A 14. TROUBLESHOOTING 110 Problem Possible cause Page 3 Skipped stitches occur whi l e s ewi n g. • Is the needle tip bent? Is the needle tip blunt? If the needle tip is bent or broken, replace the needle. • Is the needle properly installed? If it is incorrect, install the needle correctly.
Z-8550A, 8560A 14. TROUBLESHOOTING 111 Problem Possible cause Page 6 Uneven seam • Is the presser foot pressure too weak? Adjust the presser foot pressure. • Is the feed dog too low? Adjust the feed dog height. • Is the bobbin scratched? If the bobbin is damaged, smooth it with an oiled grindstone or replace it.
Z-8550A, 8560A 14. TROUBLESHOOTING 112 Problem Possible cause Page 9 Lower thread is tangled at the sewing start. Spinning of bobbin during thread trimming • Is the bobbin spinning direction correct when the lower thread is being pulled? Set the bobbin so that it turn s in the opposite direction to the rotary hook.
Z-8550A, 8560A 14. TROUBLESHOOTING 113 Problem Possible cause Page 12 Incorrect thread trimming (8560A) (Upper and lower threads are both not being trimmed) • Is the fixed knife or mo vable knife damaged or worn? Replace the fixed knife or the movable knife.
Z-8550A, 8560A 15. ERROR CODES 114 15. ERROR CODES DANGER Wait at least 5 minutes after turning off the power sw itch and disconnecting the power cord from the w all outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.
15. ERROR CODES Z-8550A, 8560A 115 <Communication and memory-related errors> Code Cause and remedy Err 401 Communication error w ith motor CPU was detected w hen t he power w as turned on. Turn off the power sw itch and then turn the power back on again.
Z-8550A, 8560A 15. ERROR CODES 116 <P.C. board-related errors> Code Cause and remedy Err 700 Abnormal rise in pow er supply voltage. Turn o ff the pow er switch and che ck the power supply voltage. Err 701 Abnormal rise in sew ing machine motor power supply vo ltage.
16. SEGMENT DISPLA Y DEFINITION T ABLE Z-8550A, 8560A 117 16. SEGMENT DISPLA Y DEFINITION T ABLE LCD display character list <Additional special symbols> 0169B.
Z-8550A, 8560A MEMO 118.
SERVICE MANUAL Z-8550A, 8560 A I5120896B 2006. 12. B (1) Printed in Ja p an.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Brother Z-8550A è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Brother Z-8550A - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Brother Z-8550A imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Brother Z-8550A ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Brother Z-8550A, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Brother Z-8550A.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Brother Z-8550A. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Brother Z-8550A insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
