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Brother S-7780A Instruction Manual
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Brother S-7780A Instruction Manual

Brother S-7780A Instruction Manual

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S-7780A
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
SINGLE NEEDLE DIRECT DRIVE LOCK STITCHER WITH SIDE
CUTTER, ELECTRONIC FEEDING SYSTEM AND THREAD TRIMMER
INSTRUCTION MANUAL

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Summary of Contents for Brother S-7780A

  • Page 1 INSTRUCTION MANUAL S-7780A Please read this manual before using the machine. Please keep this manual within easy reach for quick reference. SINGLE NEEDLE DIRECT DRIVE LOCK STITCHER WITH SIDE CUTTER, ELECTRONIC FEEDING SYSTEM AND THREAD TRIMMER...
  • Page 2 Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instructions and the explanations given in the instruction manual. With industrial sewing machines, it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take-up, and consequently there is always a danger of injury that can be caused by these parts.
  • Page 3 ) indicates something that you must do. The picture inside the circle indicates the · · · · · nature of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.) S-7780A...
  • Page 4 Contact your Brother dealer or a qualified electrician for any electrical work that may need to Secure the table so that it will not move when tilting be done.
  • Page 5 If the table moves, it may crush your feet or cause other injuries. Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the Use both hands to hold the machine head when electrical system.
  • Page 6 CAUTION Modification To prevent accidents and problems, do not modify the sewing machine (including the control devices) yourself. Brother will not be held responsible for any accidents or problems resulting from modifications made to the equipment. S-7780A...
  • Page 7 The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. Be careful not to get your...
  • Page 8 Oil tank 1768D S-7780A...

  • Page 9: Table Of Contents

    4-8. List of memory switch settings ....... 34 4-9. Setting design stitches ........38 4-9-1. Switching the display item ....39 4-9-2. No. of stitches setting......40 4-9-3. Direction setting ........41 4-9-4. Pitch setting ......... 42 4-9-5. Design stitch sewing method ....43 S-7780A...

  • Page 10: Machine Specifications

    AC servo motor Single-phase 200V-230V, 3-phase 200V-230V, Control box power supply voltage*2 Power consumption 550 VA Control circuit Microprocessor *1 Standard feed locus *2 If using a power supply voltage which is outside the normal specifications, contact the place of purchase. S-7780A...

  • Page 11: Installation

    If the table moves, it may crush your feet or cause other injuries. Contact your Brother dealer or a qualified electrician Use both hands to hold the machine head when for any electrical work that may need to be done.

  • Page 12: Installation

    1412D 2-2. Installation 1. Control box + Oil pan Control box (2) Bolts [4 pcs] (3) Nuts [4 pcs] (4) Spring washers [4 pcs] (5) Washers [4 pcs] 2. Connecting rod (6) Connecting rod (7) Nut 1413D S-7780A...
  • Page 13 ・ Tap the head rest (3) securely into the table hole. ・ If the head rest (3) is not pushed in as far as it will go, the machine head will not be sufficiently stable when it is tilted back. 1797D S-7780A...
  • Page 14 7. Turn the adjusting screw (8) to adjust so that the presser foot (7) is at the desired position within a distance of 13 mm from the needle plate when the knee lifter plate is fully pressed. 8. After adjustment is completed, securely tighten the nut (6). Within 13mm 1775D S-7780A...

  • Page 15: Lubrication

    (5) on the oil cover (4). <Lubrication oil replenishment interval> If the oil level drops below the lower reference line (6) on the oil cover (4), be sure to replenish the oil. Upper reference line Lower reference line 1418D S-7780A...

  • Page 16: Connecting The Cords

    2-4. Connecting the cords CAUTION Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done. Do not connect the power cord until all cords have been connected. The machine may operate if the treadle is depressed by mistake, which could result in injury.
  • Page 17 ・ For Europe specifications and 220 V Green and yellow wire (ground wire) specifications, refer to “2-4-2. Other cords”. <Europe specifications> Ground symbol Green and yellow wire (ground wire) Gray (ground wire) 1794D S-7780A...
  • Page 18 2. INSTALLATION 3. Cords (2) (1) Machine motor connector 4-pin (2) Feed motor connector 6-pin Lower the tab (3). Push in securely until the tabs (3) engage. 1421D S-7780A...

  • Page 19: Other Cords

    <Seen from underneath table> ・ Take care when tapping in the staples (8) to make sure that they do not pierce the cords. ・ Do extension cords, otherwise machine operation problems may result. Control box Green and yellow wire (ground wire) 1795D S-7780A...

  • Page 20: Using The Upper Knife

    (5) with the two screws (6). <Installing the needle plate cover> If it is not necessary to deposit the cut sewing scraps below the bed, fit the supplied needle plate cover (7) over the auxiliary needle plate (5). 1776D S-7780A...

  • Page 21: Using The Operation Panel (Basic Operations)

    0 up to 9. ・ If you press the key once more when “9” is displayed, the value will return to “0”. ・ If you hold down the key, the value will change continuously. 1429D S-7780A...
  • Page 22 After this, the sewing speed corresponds to the treadle depression amount. 1332D (11) Half stitch key When the sewing machine is stopped, the needle bar can be moved up and down by pressing this key. 1329D S-7780A...

  • Page 23: Sewing Start And End Backtack Stitches

    ・ If the treadle is depressed backward before sewing of the set number of start backtack stitches is complete, end backtacking will not be carried out. ・ If thread trimming lock is set, the sewing machine will stop in the needle up position without thread trimming being carried out. 2160M S-7780A...

  • Page 24: Sewing Continuous Backtack Stitches

    ・ If thread trimming lock is set, the sewing machine will stop in the needle up position without thread trimming being carried out. 2159M If "-" is set as the number of stitches for C, the number of stitches set by AB can be sewn D times. For example, if D=3: ABA If D=6: ABABAB S-7780A...

  • Page 25: Using The Operation Panel (Advanced Operations)

    (*1) When the function for memory switch No. 407 (=MSW407) (Linked/not linked to pitch) is enabled and MSW407 is "ON", the backtack sewing pitches are synchronized with the main sewing pitch so that the pitch settings are the same. When set to "OFF", the main sewing pitch and the backtack sewing pitches can be set separately. S-7780A...

  • Page 26: Switching The 4-Digit Display

    ・ When the D key is pressed, the setting increases by 100. ・ When the C key is pressed, the setting decreases by 100. NOTE: The setting range is from 220 to 4000 sti/min. 1356D S-7780A...

  • Page 27: Backtack Sewing Speed Setting Method

    ・ When the D key is pressed, the setting increases by 100. ・ When the C key is pressed, the setting decreases by 100. NOTE: The setting range is from 220 to 3000 sti/min. 1358D S-7780A...

  • Page 28: Setting The Counters

    If the A key is pressed again for 2 seconds or more, the counter display will return to the initial value and counting from the initial value will be possible. S-7780A...

  • Page 29: Production Counter

    1. ・ When the C key is pressed, the counter value decreases by 1. ・ If you press the A key for 2 seconds or more, the counter value can be reset to "0". 1363D S-7780A...

  • Page 30: Needle Replacement Counter

    If the A key is pressed again for 2 seconds or more, the counter display will return to the initial value and counting from the initial value will be possible. S-7780A...

  • Page 31: Sewing Locus Setting Method

    The setting range is from 0 to 3. 0: The feed dog moves along the standard locus. 1: The feed dog moves along special locus 1. 2: The feed dog moves along special locus 2. 3: The feed dog moves along special locus 3. 1368D 1478D S-7780A...

  • Page 32: Setting Basic Functions

    Refer to ”4-12”. 『A35』 『oSCF』 function sewing Function other than optional hand switch 1: Reverse Refer to ”4-12”. 『A36』 『oSoF』 correction sewing * Refer to MSW501 in "4-8. List of memory switches" for details on the thread holder function. S-7780A...

  • Page 33: Changing The Needle Stop Position

    (Needle down stop) (Needle up stop) 1370D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 34: Thread Trimming Disable

    (Thread trimming (Thread trimming operation enabled) disable) 1372D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 35: Correction Sewing

    (Correction sewing disabled) (Correction sewing enabled) 1376D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 36: Slow Start

    * If the maximum sewing speed is set to 4,000 sti/min NOTE: If the key is pressed once more, the indicator will switch off and the display will return to the setting item. 1378D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 37: Setting The Illumination Led Light

    NOTE: If the key is pressed once more, the indicator (Dark) (Bright) will switch off and the display will return to the setting item. 1380D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 38: Setting Lower Thread Counter Operation

    (Lower thread (Lower thread counter disabled) counter enabled) 1463D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 39: Prev. Thread Away

    ("Prev. thread ("Prev. thread away" function away" function is disabled) is enabled) 1382D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 40: Correction Sewing Function (1)

    (Correction (Correction will switch off and the display will return to the setting item. sewing function sewing function disabled) enabled) 1386D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 41: Correction Sewing Function (2)

    (Function other will switch off and the display will return to the setting item. than correction than correction sewing is disabled) sewing is enabled) 1388D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 42: Memory Switch Setting Method

    Decreases the value Increases the value 1392D Confirming the memory switch setting value ・ When the key is pressed, the setting value is confirmed. Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 43: List Of Memory Switch Settings

    ON: Presser foot can be raised and lowered ON/OFF (*) If No.051 is set to "ON", thread trimming pedal operation is disabled － after the presser foot lifter pedal has been operated during standing operation. OFF: No operation (only possible using presser foot lifter pedal) S-7780A...
  • Page 44 3: If the counter goes below "0", sewing stops, and the warning operation for a setting of "2" occurs. Feed pitch display mode 0: mm display 0 - 2 1: stitch per inch display 2: stitch per 30 mm display S-7780A...
  • Page 45 6: A - B - A - B - A - B *Same as AB (x3) Operation mode for manual production counter increment function using hand switch 0 - 1 0: Counter can be incremented at any time 1: Counter can only be incremented after sewing stops and thread has been trimmed S-7780A...
  • Page 46 Feed timing for 1st stitch at sewing end *2 (Degrees) (Degrees) -50 - 50 Feed timing for 2nd stitch at sewing end *2 (Degrees) (Degrees) -50 - 50 Feed timing for 3rd stitch at sewing end *2 (Degrees) (Degrees) S-7780A...

  • Page 47: Setting Design Stitches

    Example of design stitch setting Step Step 1 4… Item Step 2 No. of stitches … Step 1 Direction … Step 2 Sewing pitch 3.00 1.00 3.00 … * To end the program, set "No. of stitches" to "0". 1618D S-7780A...

  • Page 48: Switching The Display Item

    *2 If you press the - key when the step number is "1", the design stitch number will decrease by 1 and the step number will change to 8. (For design stitch number 1, it will become 5.) 1621D S-7780A...

  • Page 49: Of Stitches Setting

    If the number of stitches is set to 1 or more, the setting for the selected design stitch step is applied to the sewing operation. * The number of stitches for step 1 cannot be set to "0". 1622D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 50: Direction Setting

    1624D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 51: Pitch Setting

    0.05 (mm). ・ When the D key is pressed, the pitch for the selected step increases by 0.05 (mm). 1626D Setting mode will be exited and normal operation will be possible. Press the key. S-7780A...

  • Page 52: Design Stitch Sewing Method

    ② Reverse feed operation is carried out when any one of the hand switch, program reverse fixed stitches, design stitches (reverse direction) is enabled. * If an instruction for a different reverse operation occurs during reverse operation, sewing will continue in the reverse direction without returning to forward operation. S-7780A...

  • Page 53: Reading And Writing Data Using Usb Media

    Same as above Cycle programs ISMCYC.SEW Same as above Program functions in common ISMCOM.SEW Same as above Design stitches ISMDST.SEW Same as above Hand switch ISMHSW.SEW Same as above E*******.LDT ¥BROTHER¥ISM¥ISMLDT¥ Error log M*******.LDT Production data P*******.LDT Same as above S-7780A...

  • Page 54: Resetting All Settings To Their Defaults

    When initialization is complete, the 4-digit display will change to show "End", and then after one second it will switch back to the previous display. 4. Press the key. Initialization mode will be exited and normal sewing machine operation will then be possible. * For details on initialization items other than “C01 ALL”, refer to the Service Manual. S-7780A...

  • Page 55: Hand Switch

    Stops after sewing a single stitch. correction pitch (*1) Reverse continuous correction sewing at 2nd If the switch is kept pressed, sewing continues. correction pitch (*1) (*1) Set the 2nd correction pitch separately. (Refer to "4-12-2. 2nd correction pitch setting ".) Pleat presser sewing S-7780A...
  • Page 56 (*2) Set the 2nd pitch separately. (Refer to "4-12-3. 2nd pitch setting ".) (*3) When using this setting, "Settings for correction sewing switch" are disabled, even if the correction sewing setting (A04) is S-7780A...

  • Page 57: Hand Switch Function Setting

    ・ When the key is pressed, the mode returns to function setting mode. ・ When the key is pressed, the mode returns to sewing standby Select the setting mode. 1398D S-7780A...

  • Page 58: 2Nd Correction Pitch Setting

    ・ When the key is pressed, the mode returns to function setting mode. Set the ratio. ・ When the key is pressed, the mode returns to sewing standby mode. 1402D S-7780A...

  • Page 59: Cleaning

    2. eturn the machine head to its original position. 3. Replace the needle if it is bent or if the tip is broken. 4. Check that the upper threads have been threaded correctly. 5. Carry out a test sewing. 1781D S-7780A...
  • Page 60 3. Remove the two screws (3), and then remove the needle plate (4). 4. Use a soft wire brush to clean any dust from the feed dog (5). 5. Install the needle plate (4) with the two screws (3). 1782D S-7780A...

  • Page 61: Standard Adjustments

    The machine may operate if the treadle is depressed Ask your Brother dealer or a qualified electrician to by mistake, which could result in injury. carry out any maintenance and inspection of the ・...

  • Page 62: Presser Foot Height

    7. Adjust the presser foot pressure using the presser adjusting screw (4), and then tighten the nut (3). NOTE: After adjusting, check that the needle moves down into the center of the groove in the presser foot. Needle 1784D S-7780A...

  • Page 63: Adjusting The Feed Dog Height

    7. Loosen the screw (4). 8. Turn the feed lifting shaft crank (5) to move the feed bracket (6) up and down. 9. Tighten the screw (4). 10. After adjusting, press the SEL key (2). Becomes higher Becomes lower 1436D S-7780A...

  • Page 64: Adjusting The Feed Dog Angle

    2. Remove the rubber cap (3) from the face plate. 3. Loosen the screw (4) and move the needle bar (1) up or down to adjust its position. 4. Securely tighten the screw (4). 5. Install the rubber cap (3). 1785D S-7780A...

  • Page 65: Adjusting The Needle And Feed Mechanism Timing

    <A>, it may cause the needle to break. 7. After adjusting, securely tighten the set screw (6). 8. Install the side plate. Needle timing is (Standard) Needle timing is 9. After adjusting, press the SEL key (2). advanced retarded 1786D S-7780A...

  • Page 66: Needle And Rotary Hook Timing

    (3) with the center of the needle (4). The distance between the tip of the rotary hook (3) and the needle (4) should be approximately 0 - 0.05 mm at this time. 3. Securely tighten the three set screws (5). 3869M S-7780A...

  • Page 67: Adjusting The Rotary Hook Lubrication Amount

    NOTE: Turn the rotary hook adjusting screw (3) and check the lubrication amount repeatedly until the lubrication amount is correct. 4. Check the lubrication amount again after the sewing 1440D machine has been used for approximately two hours. S-7780A...

  • Page 68: Thread Trimming (Other Than Short Trailing Thread Specifications)

    2. Remove the presser foot, needle plate and feed dog. 3. Tilt back the machine head. 4. Loosen the screw (2) of the thread trimmer lever (1). 1441D 5. Install the movable knife (4) to the movable knife holder (5) with the two screws (3). 1789D S-7780A...
  • Page 69 * Tighten the screw (8) so that there is no play in the forked shaft (9). * The lower thread finger (10) must be underneath the movable knife (6). 3. Install the feed dog, needle plate and presser foot. 1442D 1mm - 1.5mm 1mm - 1.5mm 1443D S-7780A...
  • Page 70 2. Check that the edge of the thread trimmer cam (2) and the roller shaft (4) do not touch when the roller shaft (4) returns to the right. (Fig. [B]) * Tighten the two set screws (5) to approximately 4 N.m. Direction of cam rotation 0.5mm 1.0mm Should not touch 1790D S-7780A...

  • Page 71: Adjusting The Upper Knife

    * If the upper knife (2) is pressed too tightly against the needle plate (5), the upper knife (2) may not be able to rise properly. * After adjusting, press the release lever and make sure the upper knife (2) rises smoothly. 0 - 0.05mm 1792D S-7780A...

  • Page 72: Replacing Gauge Parts

    7. Install the presser foot (4) with the screw (3). 8. Install the needle (2) with the screw (1). 9. Firmly tighten the feed dog screws (13). * After installing all parts, adjust the upper knife. (Refer to "6-10. Adjusting the upper knife".) 0 - 0.05mm 1793D S-7780A...

  • Page 73: Troubleshooting

    ・ Is the thread take-up spring too weak? Adjust the tension of the thread take-up spring. ・ Is the needle and rotary hook timing correct? Adjust the height of the needle bar. Adjust the clearance between the needle and the tip of the rotary hook. S-7780A...
  • Page 74 ・ Is the presser foot being raised before the sewing machine has stopped sewing? Raise the presser foot after the sewing machine has stopped sewing. Large bird's nests ・ Is the upper thread trailing length too long after thread trimming? forming sewing Increase the tension of the pre-tension. start. S-7780A...
  • Page 75 Attach the anti-spin spring. ・ Is the bobbin turning smoothly? If the bobbin is not turning smoothly, replace the bobbin. ・ Is a bobbin other that the light-alloy bobbin specified by Brother being used? Use only bobbins which are specified by Brother.
  • Page 76 1. Check the upper thread trailing length. 2. Re-adjust the upper thread trailing length to make it longer. (1) Delete the stitch pitch for the previous stitch. (2) Decrease the sewing speed for the final stitch and the stitch before it. S-7780A...
  • Page 77 (If the power cord is too long or too many appliances are being run from a single outlet, this may cause voltage drops which will in turn cause the reset function to activate and stop the machine, even if the power supply itself is normal.) S-7780A...
  • Page 78 ・ The illumination may become momentarily darker or flicker when the momentarily darker sewing machine starts or stops, depending on the power supply in flickers. the environment where the sewing machine is being used. This is not a sign of a malfunction. S-7780A...

  • Page 79: Error Code Displays

    ・ For items with "**" appearing in the "Page" column, ask the place of purchase for advice. 1454D <Connector layout diagram> Connector P1 Connector P3 Connector P4 Connector P2 Connector P6 Connector P7 Connector P5 Connector P8 Power supply connector Feed motor connector Sewing machine motor connector 1584D S-7780A...
  • Page 80 Sewing machine motor was running continuously Turn the power off and then back on again. for too long during sewing. Thread trimming solenoid operation was not Turn off power and check if the thread trimming E191 completed within the specified period. mechanism is stiff. S-7780A...
  • Page 81 ・Turn off the power and check the connection of connector P6. ・Check that there are no foreign objects caught in the fan. Abnormal solenoid mechanism current detected Turn off the power and check the connection of E791 when solenoid was activated. connector P1. S-7780A...
  • Page 82 Turn off the power, and then repeat the version E891 programs which have been saved. update procedure. If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the place of purchase. S-7780A...

  • Page 83: Segment Display

    8. 7-SEGMENT DISPLAY 8. 7-SEGMENT DISPLAY S-7780A...
  • Page 84 INSTRUCTION MANUAL * Please note that the contents of this manual may differ slightly from the actual product purchased as a result of product improvements. © 2020 Brother Industries, Ltd. All Rights Reserved. S-7780A This is the original instructions. I0011380D E...

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