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S-7200C

4. PREPARATION BEFORE SEWING

18

4156M

4-6. Adjusting the stitch length

1. Push the dial lock lever (1) up until it clicks to release the

lock.

2. Turn the stitch length dial (2) clockwise or counter-

clockwise so that the desired stitch length is at the upper-
most position on the dial.

The larger the number, the longer the stitch length will

be.
(The numbers on the dial are for use as a guide. The
length of the finished stitches may vary depending on
the type and thickness of material being sewn. Adjust
while looking at the finished stitches.)

When turning the stitch length dial (2) from a larger

setting to a smaller setting, it will be easier to turn the
dial if the reverse lever (3) is pushed to the halfway-
down position.

3. Push the dial lock lever (1) down firmly to lock it.

* Check that the stitch length dial (2) does not rotate.

4-7. Using the thread wiper (-4[][] specifications)

Press the thread wiper key (1) on the operation panel so that
the indicator illuminates. If this is done, the thread wiper (2)
will operate after the thread is trimmed.

4-8. Using the knee lifter

The presser foot (2) can be raised by pressing the knee lifter
plate (1).

4157M

4158M

Unlocked

Locked

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Содержание S-7200C

Страница 1: ...200C Please read this manual before using the machine Please keep this manual within easy reach for quick reference SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER WITH THREAD TRIMMER INSTRUCTION MANUAL ...

Страница 2: ...l 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 Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the machine so that you will know how to use it correctly ...

Страница 3: ...ath or serious injury CAUTION The instructions which follow this term indicate situations where failure to follow the instructions could cause injury when using the machine or physical damage to equipment and surroundings Symbols This symbol indicates something that you should be careful of The picture inside the triangle indicates the nature of the caution that must be taken For example the symbo...

Страница 4: ...ion should only be carried out by a qualified technician Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done The sewing machine weighs more than 45 kg The installation should be carried out by two or more people Do not connect the power cord until installation is complete The machine may operate if the treadle is depressed by mistake which could ...

Страница 5: ...hen tilting back the machine head If the table moves it may crush your feet or cause other injuries Use both hands to hold the machine head when tilting it back or returning it to its original position If only one hand is used the weight of the machine head may cause your hand to slip and your hand may get caught Be sure to wear protective goggles and gloves when handling the lubricating oil and g...

Страница 6: ...n off the power before opening the cover 4 Be careful not to get your hands caught when returning the machine head to its original position after it has been tilted 3 5 Be careful to avoid injury from the moving thread take up 6 Be sure to connect the ground If the ground connection is not secure you run a high risk of receiving a serious electric shock and problems with correct operation may also...

Страница 7: ...ging the needle stop position 34 8 2 Slow start 35 8 3 Correction sewing 36 8 4 Thread trimming lock 37 8 5 Setting the maximum sewing speed 38 8 6 Adjusting the needle up stop position 39 8 7 Lock function 40 8 8 Resetting all settings to their defaults 40 9 SEWING 41 9 1 Sewing 41 9 2 Backtacking 41 9 3 Sewing condensed stitches 42 10 THREAD TENSION 43 10 1 Adjusting the thread tension 43 10 2 A...

Страница 8: ...peed 1 800 rpm Max stitch length 4 2 mm 5 mm Lifting lever 6 mm Presser foot height Knee lifter 16 mm Feed dog height 0 8 mm 1 2 mm Needle DB 1 DP 5 NS 9 11 11 18 19 22 Motor AC servo motor 4 pole 450W Control circuit Microprocessor When sewing at speeds of 4 000 rpm or higher set the stitch length to 4 2 mm or less Rotary hook 33S 43S 303 403 333 433 305 405 45S 453 Lubricated for light materials...

Страница 9: ...e lifter assembly 7 Power switch 8 Oil gauge window 0 3 specifications 9 Reverse lever 10 Stitch length dial 11 Oil feeding pocket 0 3 specifications 12 Machine pulley 13 Operation panel 14 Cotton stand 15 Control box Safety devices 16 Thread take up cover 17 Finger guard 4124M G10 operation panel basic function LED G50 operation panel advanced function LCD ...

Страница 10: ... hand to slip and your hand may get caught About the machine set up location Do not set up this sewing machine near other equipment such as televisions radios or cordless telephones otherwise such equipment may be affected by electronic interference from the sewing machine The sewing machine should be plugged directly into an AC wall outlet Operation problems may result if extension cords are used...

Страница 11: ...he weight and with stand the vibration of the sewing machine Drill holes as indicated in the illustration below 3 2 Installation 1 Control box 1 Control box 2 Bolts 3 pcs 3 Nuts 3 pcs 4 Spring washers 3 pcs 5 Washers 3 pcs 2 Connecting rod 6 Connecting rod 7 Nut 4126M Cotton stand hole Cord hole Head rest hole Control box mounting hole 4127M ...

Страница 12: ...s 2 pcs 2 Nails 4 pcs 5 Knee lifter complying bar 3 Knee lifter complying bar 6 Machine head 1 Hinges 2 pcs 2 Machine head 3 Head rest NOTE 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 2094M 4128M 4129M ...

Страница 13: ...crews 2 pcs Use for tightening rear cover 8 Sticker Remove 1 Sticker 9 Cotton stand 1 Cotton stand NOTE Securely tighten the nut 4 so that the two rubber cushions 2 and the washer 3 are securely clamped and so that the cotton stand 1 does not move 4131M 3636M 4306M ...

Страница 14: ...screw 9 to adjust so that the amount of play in the knee lifter 8 is approximately 2 mm when the knee lifter plate 1 is gently pressed 5 Securely tighten the nut 7 6 Loosen the nut 10 7 Turn the screw 11 until the distance between the end of the screw 11 and the knee lifter 12 is approximately 3 mm 8 Turn the adjusting screw 11 to adjust so that the presser foot 6 is at the desired position within...

Страница 15: ...t The sewing machine should always be lubricated and the oil supply replenished before it is used for the first time and also after long periods of non use Use only the lubricating oil Nippon Oil Corporation Sewing Lube 10N VG10 specified by Brother If this type of lubricating oil is difficult to obtain the recommended oil to use is Exxon Mobil Essotex SM10 VG10 1 Hold the base of the nozzle of th...

Страница 16: ... 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 When securing the cords do not bend the cords excessively or fasten them too hard with staples otherwise there is the danger that fire or electric shocks could occur Be sure to connect the ground If the ground connection is not secure you run a hig...

Страница 17: ...that the connector does not get pulled out All cords that come out from the control box should be secured to the cord holder 2 using the repeat cable tie 1 otherwise vibration from the sewing machine may cause the cords to become disconnected which can cause problems with the operation of the control box 4139M Push in securely until the tabs 6 engage Closing the cover 4141M Removal Securing Press ...

Страница 18: ...appropriate plug to the power cord 4 The green and yellow wire is the ground wire 2 Insert the power plug into a properly grounded electrical outlet NOTE Take care when tapping in the staples 3 to make sure that they do not pierce the cords Do not use extension cords otherwise machine operation problems may result 4143M Green and yellow wire ground wire Ground symbol Oil pan 4142M Seen from undern...

Страница 19: ...to the power cord 4 The green and yellow wire is the ground wire 2 Insert the power plug into a properly grounded electrical outlet NOTE Take care when tapping in the staples 5 to make sure that they do not pierce the cords Do not use extension cords otherwise machine operation problems may result 4145M Green and yellow wire ground wire Operator 4147M 4146M ...

Страница 20: ...2 pcs 9 Power cord 1 Attach an appropriate plug to the power cord 9 The green and yellow wire is the ground wire 2 Insert the power plug into a properly grounded electrical outlet NOTE Take care when tapping in the staples 7 to make sure that they do not pierce the cords Do not use extension cords otherwise machine operation problems may result Operator 4145M 4148M Green and yellow wire ground wir...

Страница 21: ...Check that the machine sews at low speed when the treadle 1 is gently pressed to position B 2 Then check that it sews at high speed when the treadle 1 is gently pressed to position C 3 After pressing the treadle 1 forward check that the needle is lowered to the top of the needle plate when the treadle 1 is returned to the neutral position A when needle down stopping has been set 4 If the treadle 1...

Страница 22: ...he screw 1 4 2 Removing the bobbin case CAUTION Turn off the power switch before removing the bobbin case The machine may operate if the treadle is depressed by mistake which could result in injury 1 Turn the machine pulley to raise the needle until it is above the needle plate 2 Pull the latch 1 of the bobbin case upward and then remove the bobbin case 3 The bobbin 2 will come out when the latch ...

Страница 23: ...bbin and cut the thread with the knife 4 Loosen the screw 5 and move the bobbin presser 6 to adjust the amount of thread wound onto the bobbin NOTE The amount of thread wound onto the bobbin should be a maximum of 80 of the bobbin capacity 4 4 Installing the bobbin case CAUTION Turn off the power switch before installing the bobbin case The machine may operate if the treadle is depressed by mistak...

Страница 24: ...threading the upper thread The machine may operate if the treadle is depressed by mistake which could result in injury Turn the machine pulley and raise the thread take up 1 before threading the upper thread This will make threading easier and it will prevent the thread from coming out at the sewing start 4155M ...

Страница 25: ...material being sewn Adjust while looking at the finished stitches When turning the stitch length dial 2 from a larger setting to a smaller setting it will be easier to turn the dial if the reverse lever 3 is pushed to the halfway down position 3 Push the dial lock lever 1 down firmly to lock it Check that the stitch length dial 2 does not rotate 4 7 Using the thread wiper 4 specifications Press th...

Страница 26: ...increases from 0 up to 99 When the key is pressed the setting decreases from 99 down to 0 3 Start backtack key When this key is pressed so that the indicator illuminates the number of start backtack stitches 0 99 in the A and B stitch number displays is sewn 4 End backtack key When this key is pressed so that the indicator illuminates the number of end backtack stitches 0 99 in the C and D stitch ...

Страница 27: ...he maximum amount The sewing speed can also be adjusted while sewing is in progress When the key is pressed the sewing speed becomes faster When the key is pressed the sewing speed becomes slower 13 Thread trimming lock key When this key is pressed so that the indicator illuminates the sewing machine stops in the needle up position without thread trimming being carried out even if the treadle is d...

Страница 28: ...ntil the set number of start backtack stitches has been sewn 4 End backtacking is carried out After it has finished the thread is trimmed automatically and the sewing machine stops in the needle up position NOTE 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 the indicator of the thread trimming ...

Страница 29: ...arried out the sewing machine will stop at the point where the treadle returns to the neutral position If the treadle is depressed again operation will resume from the point where it was interrupted If the indicator of the thread trimming lock key is illuminated the sewing machine will stop in the needle up position without thread trimming being carried out Automatic sewing When the AUTO key is pr...

Страница 30: ... thread trimming function When the treadle is continuously depressed thread trimming is carried out after the fixed stitches have been sewn Automatic sewing When the AUTO key is pressed to turn on the automatic sewing function the fixed stitches are sewn simply by depressing the treadle once without needing to depress it continuously Start and end backtack sewing The start backtack key and end bac...

Страница 31: ... the presser foot is also lifted automatically Automatic thread trimming Press the thread trimming key to turn on the thread trimming function Thread trimming is carried out automatically after the second set of F stitches has been sewn Automatic sewing When the AUTO key is pressed to turn on the automatic sewing function the fixed stitches in E and F are sewn respectively simply by depressing the...

Страница 32: ...read trimming is carried out Automatic sewing and automatic thread trimming These functions cannot be used Start and end backtack sewing The start backtack key and end backtack key can be pressed to turn on the backtack sewing function If changing the number of end backtack stitches indicated in C and D press the pleat presser sewing key to turn off the pleat presser sewing function before making ...

Страница 33: ...initial setting value will be accepted when sewing starts Lower thread counter operation 1 When sewing is carried out the value shown in the lower thread counter display is reduced by 1 for every 10 stitches sewn When the value goes below zero 0 a minus sign appears and counting continues to a maximum of 999 2 When the value goes below 0 a warning icon 1 illuminates and an electronic buzzer sounds...

Страница 34: ...achine is stopped sewing will be carried out at slow speed 220 rpm while the actuator switch is being pressed NOTE If you press the actuator switch while sewing is in progress backtack stitches will be sewn Correction sewing cannot be carried out while the indicator of the pleat presser sewing key 8 is illuminated If you press this key again while the icon 22 is illuminated the icon 22 will turn o...

Страница 35: ...he key the setting value will increase and the needle up stop position will become lower If you press the key the setting value will decrease and the needle up stop position will become higher The setting range is from 10 to 10 A setting value of 10 corresponds to an angle of rotation of approximately 10 for the upper shaft 4 The setting values will be memorized 4192M 5 Normal sewing machine opera...

Страница 36: ...his state the following three key operations are disabled so that the setting values cannot be changed accidentally FUNC key 3 This key is used to make settings for various functions ENTER key 4 This key is used to accept function settings MAX key 5 This key is used to change the maximum sewing speed Refer to the Service Manual for details on using these keys 4194M ...

Страница 37: ...ESET key press the power ON switch init ALL will appear in orange in the main display 1 1 2 Press for 2 seconds or more Once initialization is complete the main display will return to green 4192M 3 Initialization mode will be exited and normal sewing machine operation will then be possible 4193M If the X keys 2 are pressed at this time you can select the items to be initialized as shown below For ...

Страница 38: ... 9 When the key is pressed the setting decreases from 9 down to 0 3 Start backtack key When this key is pressed so that the indicator illuminates the number of start backtack stitches 0 9 in the A and B columns of the display are sewn 4 End backtack key When this key is pressed so that the indicator illuminates the number of end backtack stitches 0 9 in the C and D columns of the display are sewn ...

Страница 39: ...tinue operating until the set number of start backtack stitches has been sewn 4 End backtacking is carried out After it has finished the thread is trimmed automatically and the sewing machine stops in the needle up position NOTE 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...

Страница 40: ...nd then the needle bar will stop in the needle up position NOTE If the treadle is returned to the neutral position while continuous backtacking is being carried out the sewing machine will stop at the point where the treadle returns to the neutral position If the treadle is depressed again operation will resume from the point where it was interrupted If thread trimming lock is set the sewing machi...

Страница 41: ...he lock function off refer to 8 7 Lock function 1 Activating setting mode While pressing the end backtack key press the power ON switch 2 Setting the needle up stop and needle down stop positions When the key is pressed the UP display will appear When the key is pressed the dn display will appear Needle up stop Needle down stop NOTE If the start backtack key 1 is pressed once more the start backta...

Страница 42: ...he end backtack key press the power ON switch 2 Selecting SloW slow start Press twice 3 Enabling and disabling slow start When the key is pressed the on display will appear When the key is pressed the oFF display will appear Slow start enabled Slow start disabled NOTE If the start backtack key 1 is pressed once more the start backtack indicator will switch off and the display will return to the se...

Страница 43: ...he power ON switch 2 Selecting Corr correction sewing Press once 3 Enabling and disabling correction sewing When the key is pressed the on display will appear When the key is pressed the oFF display will appear Correction sewing enabled Correction sewing disabled NOTE If the start backtack key 1 is pressed once more the start backtack indicator will switch off and the display will return to the se...

Страница 44: ...en the key is pressed the on display will appear When the key is pressed the oFF display will appear Thread trimming locked Thread trimming not locked NOTE If the start backtack key 1 is pressed once more the start backtack indicator will switch off and the display will return to the setting item 4 The setting will be stored and the display will return to the setting item 5 Setting mode will be ex...

Страница 45: ...tion off refer to 8 7 Lock function 1 2 Setting the maximum sewing speed The maximum sewing speed is set in columns A and B Setting can be carried out in units of 100 rpm When the key is pressed the setting increases When the key is pressed the setting decreases 3 The display will return to what was shown before the MAX key was pressed NOTE While the indicator of the MAX key is illuminated all key...

Страница 46: ...f you press the key the setting value will decrease and the needle up stop position will become higher The setting range is from 10 to 10 A setting value of 10 corresponds to an angle of rotation of approximately 10 for the upper shaft 4 The setting will be stored and the display will return to the setting item 5 Normal sewing machine operation will then be possible 4206M For details on other adju...

Страница 47: ...witch 1 to OFF The lock will be canceled and the functions can then be set 8 8 Resetting all settings to their defaults If the sewing machine stops operating normally the cause may be that an incorrect setting may have been made for the memory data by means of memory switches for instance In such cases it may be possible to restore normal operation by following the steps given below to initialize ...

Страница 48: ...e machine Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries Use both hands to hold the machine head when tilting it back or returning it to its original position If only one hand is used the weight of the machine head may cause your hand to slip and your hand may get caught 9 1 Sewing 1 Press the power ON ...

Страница 49: ...urn the bolt 6 until its head is touching the solenoid lever 7 5 Tighten the nut 5 to secure the bolt 6 6 Return the machine head to its normal position Sewing 1 Return the stitch length dial 4 to the stitch length for normal sewing 2 Push down the dial lock lever 3 to engage the lock 3 Start sewing 4 At the position where you would like to start sewing condensed stitches press the actuator switch...

Страница 50: ...hread tension Upper thread tension too strong or lower thread tension too weak Decrease the upper thread tension Increase the lower thread tension Lower thread tension Adjust by turning the adjustment screw 1 until the bobbin case drops gently by its own weight while the thread end coming out of the bobbin case is held Upper thread tension After the lower thread tension has been adjusted adjust th...

Страница 51: ...st the presser foot pressure 3 Tighten the adjusting nut 1 10 3 Adjusting the trailing length after thread trimming y At the time of thread trimming the thread tension is loosened and tension is applied by the pretension 1 only y The standard trailing length for the upper thread is 35 40 mm y If the tension of the pretension 1 is increased the lengths of the threads trailing from the needle tips w...

Страница 52: ...ench 3 to loosen the set screws 2 and 3 by approximately two turns 4 Adjust the thread take up amount To increase the thread take up amount Turn the thread take up support shaft 4 clockwise so that the groove 5 is facing straight upward To return the thread take up amount to the standard setting Turn the thread take up support shaft 4 counterclockwise so that the groove 5 is facing straight downwa...

Страница 53: ...he weight of the machine head may cause your hand to slip and your hand may get caught 11 1 Daily cleaning procedures The followinig cleaning operations should be carried out each day in order to maintain the perfomance of this machine and to ensure a long service life Furthermore if the sewing machine has not been used for a long period of time carry out the following cleaning procedures before u...

Страница 54: ...m the factory 1 Look at the oil window 1 from directly in front 2 If the oil level is below the normal level add more lubricating oil as described in the following procedure Lubrication Use only the lubricating oil Nippon Oil Corporation Sewing Lube 10N VG10 specified by Brother If this type of lubricating oil is difficult to obtain the recommended oil to use is Exxon Mobil Essotex SM10 VG10 1 Rem...

Страница 55: ...more oil if the oil gauge 2 is below the lower reference line Refer to page 8 3 Checking 1 Replace the needle if it is bent or if the tip is broken 2 Check that the upper threads have been threaded correctly Refer to page 17 3 Carry out a test sewing 4239M 4238M Upper reference line Lower reference line ...

Страница 56: ...and sewing will be possible when the treadle is depressed NOTE If you do not apply grease when the GrEASEUP notification flashes the notification will continue to flash each time the power is turned on until you reset the notification by carrying out the procedure on the following page If you continue to use the sewing machine after the GrEASEUP notification appears without applying grease or with...

Страница 57: ...ount After the grease has been applied carry out the following procedure to reset the grease consumption amount 1 While pressing the key 3 and the key 4 at the right end simultaneously press the power ON switch 2 GuCt xxx will appear in the main display 1 xxx represents the amount of grease consumed For example 100 means that 100 of the grease has been consumed 3 Press the RESET key 2 for two seco...

Страница 58: ...sewing will be possible when the treadle is depressed NOTE If you do not apply grease when the GrUP notification flashes the notification will continue to flash each time the power is turned on until you reset the notification by carrying out the procedure on the following page If you continue to use the sewing machine after the GrUP notification appears without applying grease or without carrying...

Страница 59: ...ocedure to reset the grease consumption amount 1 While pressing the key 3 and the key 4 at the right end simultaneously press the power ON switch 2 GuCt will appear in the display 1 3 Press the end backtack key 5 4 The indicator of the end backtack key 5 will illuminate and the display 1 will change to showing xxx xxx represents the amount of grease consumed For example 100 means that 100 of the g...

Страница 60: ...g speed for 8 seconds Any type of paper can be used as the lubrication amount check sheet 1 5 Check the amount of oil which has spattered onto the sheet If adjustment is necessary carry out the following operations in Adjusting the lubrication amount NOTE If the lubrication amount does not match the correct amount shown in the illustration at left if the amount of spattered oil is too much or none...

Страница 61: ... hand may get caught Turn off the power switch and disconnect the power cord from the wall outlet at the following times otherwise the machine may operate if the treadle is depressed by mistake which could result in injury When carrying out inspection adjustment and maintenance When replacing consumable parts such as the rotary hook and knife If the power switch needs to be left on when carrying o...

Страница 62: ...tween the machine head and the table hole is 1 5 mm If the clearance is 3 5 mm or more install the safety switch 1 so that the washer 2 is on the machine head side as shown in Figure B If the position cannot be satisfactorily adjusted in this way add more washers of the same thickness Safety switch operation 4249M 3690M 3691M 3692M Sewing machine Table By changing the position of the safety switch...

Страница 63: ...wn in the table S specifications 0 1 0 24N 3 specifications 0 25 0 35N 5 specifications 0 30 0 5N 1 Push the needle thread with your finger until it is slightly higher than the thread tension bracket 5 and so that the upper thread is not pulled out 2 Pull the upper thread down until the thread take up spring 1 is at the same height as the base of the thread guide 3 and then measure the tension of ...

Страница 64: ... will become less 13 5 Adjusting the presser foot height The standard height of the presser foot 1 is 6 mm when the presser foot 1 is raised by means of the lifting lever 2 1 Loosen the nut 3 of the adjustment screw 4 and then turn the adjustment screw 4 so that there is no pressure applied to the presser foot 2 Raise the lifting lever 2 The presser foot 1 will also rise 3 Remove the oil cap 5 4 L...

Страница 65: ...urn the feed lifting rock bracket stud 3 within a range of 90 from the reference line 4 to adjust the vertical height of the feed bar 5 Fig A 5 Tighten the screw 2 If you are worried about the angle of the feed dog 1 turn the shaft 6 while carrying out the above adjustment Fig B Refer to 13 7 Adjusting the feed dog angle on the next page for details of this operation 2279M S 3 0 8mm 5 1 2mm Become...

Страница 66: ...position Fig C In order to prevent puckering lower the front of the feed dog 1 In order to prevent the material from slipping raise the front of the feed dog 1 5 Securely tighten the set screws 4 If you would like to tilt the feed dog 1 further turn the feed lifting rock bracket stud 5 while carrying out the above adjustment Fig D Refer to 13 6 Adjusting the feed dog height on the previous page fo...

Страница 67: ... and the point of the needle should be approximately 1 mm below the needle plate 2 5 The top of the feed dog 1 and the top of the needle plate 2 should be aligned and there should be a clearance of approximately 3 mm between the point of the needle and the needle plate 2 1 Tilt back the machine head 2 Loosen the two set screws 5 and then turn the vertical cam 3 sligtly to adjust the timing Use the...

Страница 68: ...llustration The needle should rise by 1 8 mm 2 2 mm for 5 specifications and the distance from the needle hole to the tip of the rotary hook should be 0 5 0 7 mm 2 Loosen the set screws 5 and then align the tip of the rotary hook 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 3 Securely tighten the set screws 5...

Страница 69: ...o the position in figure B The treadle stroke will then be increased by approximately 27 At this time the treadle forward and backward depression sensitivity will change so readjust if necessary 13 12 Adjusting the presser foot floating amount minute lifting amount When sewing stretch materials and materials with long pile you can make minute adjustments to the floating amount for the presser foot...

Страница 70: ...is not tight y Is the lower thread tension too weak or is the upper thread tension too strong Adjust the lower thread tension or upper thread tension 43 3 Loops appear in seam y Is the thread path not smooth enough Use a file with a fine grain or sandpaper to polish smooth the thread path y Is the bobbin not turning smoothly Pull out the lower thread to check that there is no slackness in the thre...

Страница 71: ...n 56 56 44 15 27 35 28 39 6 Uneven seam y Is the presser foot pressure too weak Adjust the presser foot pressure y Is the feed dog too low Adjust the feed dog height y Is the bobbin scratched If the bobbin is damaged smooth it with an oiled grindstone or replace it 44 58 7 Large degree of puckering excess tension y Is the upper thread tension too strong Make the upper thread tension as weak as pos...

Страница 72: ...he machine properly threaded If it is incorrect thread the thread correctly y Is the rotary hook sufficiently lubricated 0 3 specifications If the oil gauge is down to the lower reference line in the oil gauge window add more oil y Is the upper or lower thread tension too weak or too strong Adjust the upper thread or lower thread tension y Is the upper thread may be loose because the thread take u...

Страница 73: ...iability regulations 15 60 61 60 14 Oil gauge 1 is not visible in oil gauge window y Is the oil tank empty 0 3 specifications Fill the oil tank with oil 8 15 Machine does not operate when power is turned on and treadle is pressed y Is the power supply connector disconnected from the control box Insert the connector securely 12 13 16 Machine does not operate at high speed y Is the sewing speed sett...

Страница 74: ...onnected from the control box Insert the connector securely y Is the operation panel connector inside the control box disconnected Insert the connector securely 12 10 19 GrEASEUP or GrUP flashes in the panel display when the power switch is turned on y This display is to notify you that it is time to apply grease Apply grease 49 51 4263M 4264M ...

Страница 75: ...ch first E051 The machine head was detected as being tilted back during sewing Turn the power off and then back on again E055 Was the power ON switch pressed while the machine head was still tilted back Press the power OFF switch and then return the machine head to the upright position Is the 14 pin machine connector inside the control box disconnected Press the power OFF switch and then check tha...

Страница 76: ...ewing machine could not stop correctly at the needle up stop position after thread trimming Remove any thread scraps that may be blocking the motor Press the power OFF switch and then turn the machine pulley by hand and check that it turns easily Check that there are no problems with the thread trimming mechanism E130 The sewing machine or motor do not operate when the treadle is depressed Is the ...

Страница 77: ...hine motor locks during thread trimming Remove any thread scraps that may be blocking the motor Check that there are no problems with the thread trimming mechanism E410 Error communicating with operation panel Is the 12 pin operation panel connector inside the control box disconnected Press the power OFF switch and then check that the 12 pin operation panel connector is connected to connector P7 o...

Страница 78: ...ow Check the power supply voltage Problem with control box Replace the control box E710 Motor overcurrent Is the electrical equipment connector inside the control box disconnected Press the power OFF switch and then check that the drive P C board connectors are connected to connectors P3 and P4 on the main P C board Problem with control box Replace the control box E791 Solenoid overcurrent This is...

Страница 79: ...S 7200C 15 7 SEGMENT DISPLAY 72 15 7 SEGMENT DISPLAY 4268M ...

Страница 80: ...INSTRUCTION MANUAL 15 1 Naeshiro cho Mizuho ku Nagoya 467 8561 Japan Phone 81 52 824 2177 2008 Brother Industries Ltd All Rights Reserved S 7200C SA9809 001 E 2008 07 B 1 http www brother com ...

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