Brother BM-917B Instruction Manual
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Brother BM-917B Instruction Manual

Brother BM-917B Instruction Manual

Chainstitch button sewer with thread trimmer
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BM-917B
CHAINSTITCH BUTTON SEWER WITH THREAD TRIMMER

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Summary of Contents for Brother BM-917B

  • Page 1 BM-917B CHAINSTITCH BUTTON SEWER WITH THREAD TRIMMER...

  • Page 2: Safety Instructions

    This symbol ( ) 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”.) BM-917B, 917C...

  • Page 3: Notes On Safety

    Furthermore, do not drink the oil under any circumstances, receiving a serious electric shock, and problems as it can cause vomiting and diarrhoea. with correct operation may also occur. Keep the oil out of the reach of children. BM-917B, 917C...

  • Page 4: Maintenance And Inspection

    Wait before using the machine. until the motor stops fully before starting work. Any problems in machine operation which result from unauthorized modifications to the machine will not be covered by the warranty. BM-917B, 917C...

  • Page 5: Warning Labels

    Direction of operation <Rear> Motor 1959M 1958M BM-917B, 917C...

  • Page 6: Table Of Contents

    10-1. Main thread tension ........15 10-2. Adjusting the sub tension timing....15 10-3. Adjusting the thread presser tension opening amount............15 10-4. Adjusting the auxiliary tension ...... 16 10-5. Adjusting the rotor ........16 10-6. Adjusting the presser arm pressure ..... 16 BM-917B, 917C...

  • Page 7: Names Of Major Parts

    Needle TQ x 1 Button size 10−20 mm (W) (10−30 mm : When using the optional button clamp) Button hole spacing 2.0−6.5 mm×0−6.5 mm (X x Y) Button clamp lift stroke 14 mm Maximum sewing speed 1,500 rpm BM-917B, 917C...

  • Page 8: Table Processing Diagram

    The top of the table should be 40 mm in thickness and should be strong enough to hold the weight and withstand the vibration of the sewing machine. Drill holes as indicated in the illustration below. <Seen from above table> For two treadles Machine head fixing hole Motor pulley center Motor mounting holes Table center line 1966M BM-917B, 917C...

  • Page 9: Motor

    Motor pulley (Outer diameter) V-belt 50Hz N-75 pulley(75mm) 1,500 rpm 60Hz N-65 pulley(65mm) <Diagram of installation position for pulley covers (sold separately)> <Seen from above table> Pulley cover Motor Machine head fixing hole Motor pulley center Pulley cover 1967M BM-917B, 917C...

  • Page 10: Installation

    7. Return the machine head to its original position, and then tighten the bolt (3). Pedal stoppers 1969M 8. Remove the screw (7) from the face plate, and then install the needle bar cover (8). 9. Install the eye guard (9) with the bolt (10). 1970M BM-917B, 917C...

  • Page 11: Installing The Belt

    2. Secure it by tightening the set screw (2). 1972M 5-4. Installing the cotton stand Assmble the cotton stand as shown in the illustration, and then install it to the far right corner of the table with the two wood screws. Push in 1973M BM-917B, 917C...

  • Page 12: Ground Wire Connections

    Use only the lubricating oil (Nisseki Mitsubishi Sewing Lube 10N; VG10) specified by Brother. 1. Open bed cover R (1) and bed cover L (2). 2. Add 1−2 drops of oil in the places indicated by the arrows. 1976M <Left side of sewing machine> BM-917B, 917C...

  • Page 13: Test Operation

    (4) comes into contact with the end of the stop cam segment (5). (The presser arm will lift up, and the cycle of operations for attaching a single button will then be complete.) * Repeat steps 1 to 4 to carry out the next cycle of operations 1978M BM-917B, 917C...

  • Page 14: Preparation Before Sewing

    2. Insert the needle in a straight line as far as it will go, making sure that the long groove on the needle is toward the front, and then securely tighten the screw (1). Long groove in needle Front 1979M BM-917B, 917C...

  • Page 15: Threading

    * The motor will keep turning even after the power is switched off as a result of the motor’s inertia. Wait until the motor stops fully before starting work. 1980M <View from above> If thread breakage occurs grequently when using extrafine thread (cotton #80/3S or #70/2S) pass the thread through only one thread hook hole. 64-70mm 1981M BM-917B, 917C...

  • Page 16: Adjusting The Thread Take-Up Lever

    * If the stitch joint is too loose, move the thread take-up lever (1) down to increase the amount of thread take-up. Reference line <Cotton thread> <Synthetic thread> 1983M BM-917B, 917C...

  • Page 17: Vertical Feed And Transverse Feed Positioning

    (scale indicator) (for buttons with four thread holes). 1987M 1985M <Transverse feed> At the sewing machine stopping position, loosen the nut (3) and align the index mark of the transverse feed plate (4) with the button hole spacing (scale indicator). 1986M BM-917B, 917C...

  • Page 18: Setting The Button

    1. Insert a button into the button clamp (2). 2. Loosen the shoulder screw (4), push the size adjust plate (3) in as far as it will go so that the button is held tightly, and then securely tighten the shoulder screw (4). 1990M BM-917B, 917C...

  • Page 19: Setting The Number Of Stitches

    1. Pull out the stitch control knob (1) and then turn it in the direction of the arrow. 2. Remove the shoulder screw (2) and roller (3) from the bed base, and then install them to the stitch hanging gear (4). 1993M BM-917B, 917C...

  • Page 20: Sewing

    3. Depress the pedal to start the sewing machine. 4. Release the pedal quickly. The button will be attached, after the thread is trimmed, and then the presser arm will lift up and the sewing machine will stop. BM-917B, 917C...

  • Page 21: Thread Tension

    Opening amount becomes larger 1. Loosen the nut (2), and then turn the thread presser tension stud (3) to adjust the opening amount. Loosen 2. Tighten the nut (2). 0.5-0.8mm 1998M BM-917B, 917C...

  • Page 22: Adjusting The Auxiliary Tension

    1. Loosen the nut (1), and then turn the nut (2) to adjust the pressure. 2. Tighten the nut (1). Becomes Becomes Becomes Becomes stronger weaker stronger weaker 2002M BM-917B, 917C...

  • Page 23: Cleaning

    Wipe the eye guard clean with a soft cloth. NOTE : Do not use solvents such as kerosene or thinner to clean the eye guard. 2003M <Checking the needle> If the needle tip is bent or broken, replace the needle. 2004M BM-917B, 917C...

  • Page 24: Standard Adjustments

    * If using a TQx7 needle, adjust by aligning reference line (d). 1. Loosen the two set screws (4), and then turn the looper setting shaft (5) to adjust the timing. 2. Tighten the set screws (4). 2006M BM-917B, 917C...

  • Page 25: Adjusting The Needle And Looper Clearance

    <Transverse direction> 1. Loosen the two set screws (5). 2. Turn the triangular cam (6) to align the reference line with Reference Lines the reference line of the looper setting shaft (4). 3. Tighten the set screws (5). 2010M BM-917B, 917C...

  • Page 26: Adjusting The Machine Pulley Clearance In The Direction Of Thrust

    Adjust the distance from the top of the feed plate (1) to the edge of the button clamp (2) to 13-14 mm. 1. Loosen the bolt (3), and then move the presser adjust plate (4) up or down to adjust the distance. 2. Tighten the bolt (3). 13-4mm 2013M BM-917B, 917C...

  • Page 27: Adjusting The Button Opener

    Turn the machine pulley and check that the opening amount for the tip of the button clamp (8) is 2-3 mm at both left and right. * If the opening amount is not correct, repeat the “Vertical position” adjustment above. 2-3mm 2-3mm 2016M BM-917B, 917C...

  • Page 28: Adjusting The Fixed Knife And Movable Knife

    1. First adjust the position of the fixed knife (1). (Refer to above.) 2. Loosen the nut (4), and then move the connecting lever (5) to adjust the distance. 3. Tighten the nut (4). 4. Install the feed plate and the needle plate. 2019M BM-917B, 917C...

  • Page 29: Installing Optional Parts

    * If using the B913 or B915 type of presser arm, adjust using the button holder hook (sold separately) instead of the presser adjust plate. Button holder hook (Parts No. : S38181001) 6. Securely tighten the bolt (12). 7. Install the needle. 13-14mm 2075M BM-917B, 917C...

  • Page 30: Feed Plate

    1. If the needle does not drop into the centers of the button thread holes, loosen the bolts (1) and adjust the position of the button clamp assembly (3). After adjusting, tighten the bolts (1). 2026M BM-917B, 917C...

  • Page 31: Troubleshooting

    Adjust the position of the thread take-up lever in accordance with the thread being used. • Is the button opener adjusted correctly? ・ (4-hole) (2-hole) Adjust the transverse position and vertical position of the button opener. • Insufficient thread remainder. • Stitch is too short. 2060M BM-917B, 917C...
  • Page 32 Adjust the position of the thread handler. (4-hole) (2-hole) 2062M Thread end not properly • Is the thread take-up amount for the rotor too large? ・ wound on the first stitch. Reduce the scale setting for the rotor. (4-hole) (2-hole) 2064M BM-917B, 917C...
  • Page 33 • Is the clearance between the needle and the looper too large? ・ Adjust the position of the looper. • Is the clearance between the needle and the needle guide too large? ・ Adjust the position of the needle guide. BM-917B, 917C...
  • Page 34 • Is the fixed knife or movable knife blunt? ・ trimming － Replace the fixed knife or the movable knife. ・ • Is the position of the fixed knife or movable knife correct? Adjust the positions of the fixed knife and movable knife. 2073M BM-917B, 917C...
  • Page 35 • Is the sewing machine operating speed too slow? ・ the stop position. Use a machine pulley that matches the frequency. Button clamp lift stroke is • Is the braking force too strong? ・ too small. Adjust the brake. Thread is not cut. BM-917B, 917C...
  • Page 36 INSTRUCTION MANUAL 　　　　□ MANUAL DE INSTRUCCIONES 878-917 SA0723-001 2002.10.B(1)

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