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2. Adjusting the needle thread trimmer

! Warning

Please turn off the power switch and confirm that the motor has stopped before operation to

prevent personal injuries caused by unexpected start.

(1) Adjusting the thread grasping force of the needle

thread trimmer

If the needle thread trimmer fails to provide consistent

thread grasping force, the needle thread can slip off at

the beginning of sewing.

1) If the thread grasping force of the needle thread

trimmer has reduced, loosen setscrew

①

and

detach needle thread trimmer

②

2) Slightly bend the top end of thread presser spring

and adjust the contact clearance between presser

spring

③

and needle thread trimmer

④

to zero.

(2) Installation height of needle thread trimmer

Loosen setscrew



of needle thread trimmer and adjust

the installation height of needle thread trimmer

Try to make needle thread trimmer do not touch presser

as far as possible in order to minimize the length of

remaining thread on the needle after trimming.

Note that the presser tilts when sewing a multi-layered

portion of the material. Attach the needle thread

trimmer to slightly raise the installing position of the

trimmer.

When replacing the needle thread trimmer,

make sure that the trimmer normally works

under the needle thread trimmer adjusting

mode (memory switch level 2: K051).

Содержание GT1790A

Страница 1: ...GT1790A COMPUTER CONTROLLED HIGH SPEED LOCKSTITCH BUTTONHOLING MACHINE INSTRUCTION BOOK...

Страница 2: ...r type 25 5 Selecting pattern 26 6 Change needle thread tension 27 7 Performing re sewing 29 8 Winding bobbin thread 31 9 Using the counter 33 10 Using the initial value management 35 11 Changing sewi...

Страница 3: ...Adjusting the presser bar pressure 69 4 Adjusting the bobbin presser unit 69 5 Thread tension 70 6 Replacing the fuse 71 VII Standard Parts 72 1 Cloth cutting knife 72 2 Throat plate 72 3 Presser 72...

Страница 4: ...ng Machine Subclass Major application Buttonholes on button cloth such as shirts blouses working uniforms suit dress Buttonhole size 1 Specifications Sewing speed Standard speed 3600sti min Max 4200st...

Страница 5: ...2 2 List of standard sewing shapes...

Страница 6: ...3 3 Structure...

Страница 7: ...4 CSM 1790A is composed of the following components Power switch Sewing machine head CSM 1790A Operation panel Electrical box Pressor lifting pedal Thread stand device...

Страница 8: ...ing strip 3 Pass four bed base fixed screws 4 through bed base 4 Install rubber cushions to holes 4 for fixing bed base and the fixe the bed base 5 Fix machine head support bar on the table 6 Connect...

Страница 9: ...ease choose cables according to the specification Voltage indication tag Rating label Please do not run the machine under different voltage specifications Connection for single phase 200V 220V 230V an...

Страница 10: ...be caused when the sewing machine is tilted 1 Rubber Metal Danger Perform the work so as not to allow your fingers to be caught in the machine when tilting or raising it In addition to avoid possible...

Страница 11: ...Connect the safety switch connector to the connector on the machine head side 6 Installation of the hook oil proof plate 7 Installation of operation panel Please fix the operation panel with 4 wood sc...

Страница 12: ...ition when using electric bobbin winding device optional please pass the cable through the cable holder and then connect it to CN44 2 Directly insert the cable connected to the operation panel on the...

Страница 13: ...ewing machine slowly while confirm that no cable is forcibly pulled 2 As shown in the figure secure cables with cable fixing plate When tilting the sewing machine please make sure that the machine hea...

Страница 14: ...ake sure the eye protective cover has been installed before operating the sewing machine When placed longitudinally When placed horizontally 11 Fixation of STOP switch At the time of delivery the STOP...

Страница 15: ...12...

Страница 16: ...guide rod so that two side holes in the thread guide rod face the thread guide 13 Installation of thread stand 1 Assemble the thread stand into the holes on the top right of the table 2 Tighten the se...

Страница 17: ...the auxiliary table temporarily 2 Fix the auxiliary table with bolts 2 on the sewing machine bed temporarily 3 Fix the bolts 4 to remove the clearance between the sewing machine bed and the auxiliary...

Страница 18: ...time please remove the bobbin case and drip 2 3 droplets of oil on the side slots of the cover In addition drip several droplets of oil into the oiling hole in the metal parts in front of the lower s...

Страница 19: ...different methods shall be used for the thread guide 4 Threading the bobbin case Rotating direction of bobbin and threading 1 Insert the bobbin in the direction of arrow 2 Pass the thread through thre...

Страница 20: ...05N after the hook has been installed because an anti spin spring has been installed in the machine Caution When bobbin thread tension is adjusted check the needle thread tension setting of the memor...

Страница 21: ...18...

Страница 22: ...e In mm 1 4 6 40 3 8 9 50 7 16 11 10 1 2 12 70 9 16 14 30 5 8 15 90 11 16 17 50 3 4 19 10 13 16 20 60 7 8 22 20 1 25 40 11 8 28 60 11 4 31 80 13 8 34 90 1 1 2 38 10 If the knife in service is displaye...

Страница 23: ...20 V Operation of the Sewing Machine 1 Description operation panel switch...

Страница 24: ...ey is pressed S022 1st clearance and S023 2nd clearance will be displayed alternately Item selection key This key selects the data No and other data Thread Tension key This key is used to select the t...

Страница 25: ...ttern No you desire to sew The selected pattern No C is displayed when the power is switched on In case of pattern change press the Data Change key and select the intended pattern No Pattern No 1 10 a...

Страница 26: ...ds then the memory switch Level 2 on the menu will be displayed Select with Item selection key Press the Edit key and memory switch Level 2 editing screen A will be displayed If pedal type selection p...

Страница 27: ...product 2 Confirmation of set sewing product Depress the pedal to Level 1 and the presser will drop down to the intermediate position 3 Confirmation of sewing start Depress the pedal to Level 2 and t...

Страница 28: ...er type below 2 Table of presser type Engraved part number of presser should be in line with the type of presser Type 1 Type 2 Type 3 Type 5 Type Part No of presser foot Type 1 Type 2 Type 3 Type 5 Se...

Страница 29: ...rently selected pattern No A is displayed 3 Call the pattern selection screen Press Data Change key and the patterns which have been registered are changed over in order and displayed Now select patte...

Страница 30: ...Press Data Change key to increase or decrease set value D then the thread tension can be changed The relation between the sewing effect and the set value is as shown in the illustration below Set the...

Страница 31: ...edle thread to permit it to pass straight through fabric the purl stitch is formed by the bobbin thread which is pulled over from both sides to the center line Whip stitch The whip stitch is formed in...

Страница 32: ...splayed 2 Return the presser Press Backward key 1 and the presser returns stitch by stitch Press Forward key 2 and the presser advances stitch by stitch Return the presser to the re sewing position 3...

Страница 33: ...the step motion screen C is displayed 2 Return the pressor to the sewing object setting position Press again Reset key and the presser returns to the sewing object setting position starting position 3...

Страница 34: ...starts winding bobbin thread 4 Stop the sewing machine Once the bobbin is wound with the predetermined amount of thread bobbin winding lever will be released Press Presser and Winder key or depress th...

Страница 35: ...32 Direction A Decrease Direction B Increase...

Страница 36: ...em Select key to display the icon B indicating the counter type in reverse video Press Data Change key and select the proper counter from the following counter types 3 Change the counter set value Pre...

Страница 37: ...s stitching is performed the existing value is counted up When the existing value is equal to the set value count up screen is displayed Pcs No down counter Each time one cycle or one continuous stitc...

Страница 38: ...ct shape The shape selection screen B is displayed to show the currently selected shape C Select shape C to sew with Data Change key It is possible to select the shape from 12 shapes at the time of yo...

Страница 39: ...36 confirmed through the steps above to the normal pattern Refer to V 14 Copying sewing pattern P 39 for the copying procedure...

Страница 40: ...input mode 2 Call sewing data editing screen Press Edit key and the sewing data edit screen A for the currently selected pattern No is displayed 3 Select sewing data to be changed Press Item Selection...

Страница 41: ...initial value data 1 Set the mode to the input mode Under the input mode where Set Ready LED goes out data setting is enabled In sewing mode press to change over the mode to input mode 2 Call sewing d...

Страница 42: ...fter setting the U019 Function of plural motions of cloth cutting knife of memory switch data as active you can make knife act as per the knife size set in the item U018 Cloth cutting knife size to cu...

Страница 43: ...t shape 1 8 1 1 S016 Eyelet width This item sets crosswise size of the inside of eyelet shape Actual needle entry point is the dimension to which S04 Knife groove left width is added 1 0 10 0 0 1mm 1...

Страница 44: ...5 Basting pitch This item sets pitch at the time of basting 1 0 5 0 0 1mm 3 S036 Rolling length of basting This item sets rolling length of needle thread when performing basting 2 0 20 0 0 1mm 3 S037...

Страница 45: ...left parallel section of 1st cycle at the time of double stitching 0 200 1 2 3 S054 Right parallel section tension 1st cycle of double stitching This item sets needle thread tension at right parallel...

Страница 46: ...sewing 0 0 2 0 0 1 mm 2 S067 Bar tacking width at the end of sewing This item sets tie stitching width at the end of sewing 0 1 1 5 0 1 mm S068 Number of stitches of bar tacking at the end of sewing T...

Страница 47: ...025mm K002 Width of advancing This item sets sewing width of advancing side of bar tacking shape Shape Nos 27 28 29 and 30 of S001 0 1 10 0 0 05mm K003 Pitch of returning This item sets sewing pitch...

Страница 48: ...5 Selecting pattern P 24 When creating new pattern data it is convenient to copy the initial value pattern Refer to V 10 Using the initial value pattern P 30 3 Call copy screen Press Copy key and copy...

Страница 49: ...e 2 Call mode screen Press Mode key to display the mode screen operator level Press Mode key for 3 seconds and then mode screen maintenance personnel level will be displayed On each level mode screen...

Страница 50: ...ister key P 42 for details 5 Selection of editing sewing parameter Refer to V 12 Method of setting sewing data with without edit P 32 for details 6 Check program Refer to Service Manual for details 7...

Страница 51: ...rameter registration key setting screen can also be displayed by pressing and holding the parameter registration key to be edited 3 Select parameter Item B which can be registered to the key is displa...

Страница 52: ...ontinuous sewing data selection is enabled In sewing mode press Ready key to change over the mode to input mode The continuous sewing data can be selected only in input mode 2 Call the pattern selecti...

Страница 53: ...int is carried to the last piece of data the additional indication pictograph is displayed if there is an available pattern number Move forward the editing point from there and then the data name will...

Страница 54: ...eady key to cancel insertion of pattern data and change over to sewing mode Press Return key to cancel insertion of pattern data and change over to input mode Input is completed by the steps above For...

Страница 55: ...ange over the mode to input mode The continuous sewing data can be selected only in data mode 2 Selection of cycle sewing data Press Item Selection key and then the selected patterns will be displayed...

Страница 56: ...t is carried to the last piece of data the additional indication pictograph is displayed if there is an available pattern number Move forward the editing point from there and then the data name will b...

Страница 57: ...icon display to cancel insertion of pattern data In addition press Ready key to cancel insertion of pattern data and change over to sewing mode Press Return key to cancel insertion of pattern data an...

Страница 58: ...int Press Item Selection key and then the editing point will move sequentially Text displayed between and is the editing point to be selected 3 Change the text in editing point Press Data Change key t...

Страница 59: ...Then press Data Change key to set the size of knife C attached For details refer to V 22 List of memory switch data p 52 3 Set the plural motions of cloth cutting knife as enabled Next press Item Sel...

Страница 60: ...personnel level will be displayed You can choose memory switch data in this screen level 2 3 Select memory switch data to be changed Press Item Selection key and select the data item to be changed 4 C...

Страница 61: ...0 1 35 U008 Needle thread tension of basting for sewing together setting 0 200 1 60 U009 Soft start speed setting 1st stitch 400 4200 100 sti min 800 sti min U010 Soft start speed setting 2nd stitch 4...

Страница 62: ...ng Presser up Presser down Presser up U023 Needle thread trimming motion start distance Distance from the start of sewing to the start of needle thread trimmer release motion is input 0 15 0 0 1mm 1 0...

Страница 63: ...e K007 Max sewing speed setting Max speed of sewing machine can be limited When K006 machine is set to dry head type the max sewing speed is limited to 3300sti min automatically 400 4200 100sti min 36...

Страница 64: ...bin thread trimmer at the start of sewing This item sets the amount of releasing the bobbin thread trimmer at the start of sewing 0 15 1 pulse 8 K022 Presser lifter speed This item sets presser lifter...

Страница 65: ...and displayed in reverse video successively Select the targeted registration destination The destination can be selected from the five ones shown in the table at the right 3 Register pedal depression...

Страница 66: ...ss Edit key and then screen A for contrast adjustment value will be displayed 2 Adjust the contrast The contrast can be adjusted in five steps from 1 brightest to 4 darkest by pressing Data Change key...

Страница 67: ...ata Content Parameter Data Sewing shape Cloth cutting length stitch width and other inherent sewing data forms compiled Icon form data Data of compiled needle entry point Refer to the service manual f...

Страница 68: ...65 4 Select No Press Item Selection key to select file No B to be read Press Data Change key to select file No C to be written Press Ready key to write data...

Страница 69: ...just the needle to hook relation when the needle enters the center of the needle hole in the throat plate 1 Needle bar height 1 Drop the needle bar to the lowest point 2 Insert part 1 A of timing gaug...

Страница 70: ...eedle bar and throat plate where the needle bar touches the timing gauge 3 Loosen setscrew C of the hook sleeve and align blade point of the sewing hook with the center of needle hole Make a clearance...

Страница 71: ...d of thread presser spring and adjust the contact clearance between presser spring and needle thread trimmer to zero 2 Installation height of needle thread trimmer Loosen setscrew of needle thread tri...

Страница 72: ...e mode to input mode 2 Call S090 presser pressure Press Edit key and use Item Selection key to select S090 presser pressure A If S090 value is increased presser bar pressure will increase and the clot...

Страница 73: ...e slot of thread tension post while screw is tightened and turn it Turning it clockwise will increase the pressure of the thread take up spring Turning it counterclockwise will decrease the pressure 2...

Страница 74: ...Unplug the power cord from power outlet after confirming the power switch turned OFF Then wait for over 5 minutes 3 Remove four screws for fixing rear cover of electric box and then open the rear cov...

Страница 75: ...47N 7 8 22 2 P CS2702047P 1 25 4 Q CS2702047Q 1 1 4 31 8 S CS2702047S 2 Throat plate Stitch width Type 5mm marking AxB 6mm marking AxB Standard S CS79004350 S5 1 4x6 2 CS79004351 S6 1 4x7 4 For knits...

Страница 76: ...ROM When the mounted EEP ROM is different in type Turn OFF the power Previous screen E019 Oversized file Size of the file to be read is too large Restart by reset Previous screen E020 FLASH write erro...

Страница 77: ...tected Turn OFF the power E082 Feed motor out of step detection error When the out of step of the Y feed motor is detected Turn OFF the power E083 Presser foot position error When the presser foot hei...

Страница 78: ...ser foot motor immovable E224 Presser foot motor out of control E231 E310 Knife motor position error E232 knife motor overcurrent E233 Knife motor immovable E234 Knife motor out of control E304 Knife...

Страница 79: ...a of basting exceeds presser size Re input by reset During individual sewing cycle sewing Sewing data edit screen S040 Basting needle entry compensation during continuous sewing Standard screen E493 O...

Страница 80: ...efectiveness or phase lack When encoder of sewing machine motor is abnormal Turn OFF the power E731 Main motor hole sensor defectiveness or position sensor defectiveness When hole sensor or position s...

Страница 81: ...ieval error When origin sensor signal is not input at the time of origin retrieval motion Turn OFF the power E912 Sewing motor speed detection error When the sewing machine motor malfunctions Turn OFF...

Страница 82: ...ead tension at parallel section 25 2 Position of needle thread trimmer is too high Lower the needle thread trimmer to such an extent that it does not come in contact with the presser 62 3 Stroke of th...

Страница 83: ...needle comes in contact with the blade point of hook 3 Check whether needle thread trimmer comes in contact with needle when it opens 4 Check whether needle comes in the center of the needle hole of...

Страница 84: ...ting Compensation of left side position of basting Compensation of right side position of basting Setting basting speed Left parallel section tension Right parallel section tension Left parallel secti...

Страница 85: ...ic chinatypical com www chinatypical com Certificate of the international ISO9001 Certificate of the ISO14001 Certificate of the international CE Certificate for Ecolabelling Product Certificate for E...

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