Leson 1Sistèm tansyon: pwosedi dyagnostik ak ajisteman tansyon anwo ak bobinPran konfyans pou ajiste tansyon fil pou kouti konsistan. Aprann ki jan tansyon anwo ak bobin yo entèraksi, ki jan pou dyagnostike move balans soti nan aparans kouti a, ak ki jan pou fè ajisteman ak tès kontwole san twòp koreksyon.
Reading stitch balance on top and undersideTesting and setting bobbin case tension rangeAdjusting upper tension and check spring actionEffects of thread size and fabric on tensionRecording baseline settings for repeatabilityLeson 2Pye, arbr, ak chalè ki gen rapò ak lubrifikasyon: deteksyon ak antretyen korektifAprann ki jan pwoblèm pye ak arbr kreye chalè, ki jan pwi lubrifikasyon akselere mete, ak ki jan pou detekte chalè twòp bonè lè l sèvi ak touche, pran sant, ak zouti, apre sa aplike antretyen korektif an sekirite pou retabli operasyon dou ak fre.
Typical overheating symptoms and risk indicatorsChecking bearings and shafts for play and scoringAssessing oil level, grade, and delivery pathsUsing temperature, smell, and noise for diagnosisCorrective steps and post-repair verificationLeson 3Kalite zegwi, gwosè, ak materyèl pou denim pwa mwayen; chwazi zegwi kòrèk ak rekonèt mete zegwiFokis sou seleksyon zegwi pou denim pwa mwayen. Konpare sistèm zegwi, gwosè, ak materyèl, matche yo ak fil ak twal, ak aprann rekonèt mete, domaj, ak defo sibtil ki degrade kalite kouti ak ogmante kas.
Needle systems used on industrial lockstitch unitsChoosing size and point for denim and threadCoatings and materials for heat and wear controlVisual and tactile signs of needle wear or damageReplacement intervals and documentation habitsLeson 4Chemen fil ak erè filaj komen ki lakòz kasTrase chemen fil konplè a ak aprann kote erè yo rive. Idantifye move wout, gid rate, ak bypass tansyon ki lakòz kas, kouti rate, ak efriye, apre sa aplike yon woutin filaj ak verifikasyon repetab.
Mapping the full upper thread pathCommon misrouting points and missed guidesBobbin winding and insertion best practicesThread quality issues that mimic path faultsStandardized threading and double-check stepsLeson 5Fòmasyon kouti, mekanis longè kouti, ak kòz longè kouti iregilyeKonprann ki jan yon lockstitch fòme ak sa ki kontwole longè kouti. Etidye mekanis alimantasyon, regilatè kouti, ak kòz komen nan longè iregilye pou w kapab retabli kouti inifòm, espesifye sou denim ak materyèl menm jan an.
Sequence of lockstitch formation step by stepFeed dog motion and stitch length regulatorEffects of presser foot pressure on feedingSlippage, drag, and operator handling issuesInspection and adjustment of feed componentsLeson 6Anatomi machin lockstitch endistriyèl: bar zegwi, navèt/krochi, ka bobin, chen alimantasyon, pye presè, asanble tensyonEtidye asanble prensipal yon machin lockstitch endistriyèl ak ki jan yo entèraksi pou fòme yon kouti. Idantifye bar zegwi, krochi/navèt, ka bobin, chen alimantasyon, pye presè, ak inite tansyon pou w kapab trase defo nan konpozan espesifik.
Needle bar, clamp, and driving mechanismsShuttle or rotary hook and bobbin case layoutFeed dog, throat plate, and presser foot rolesUpper tension, check spring, and guidesDrive train, handwheel, and belt connectionsLeson 7Defo krochi ak revizyon: sentòm, mezi, ak tcheke revizyon senpIdantifye sentòm defo krochi ak revizyon, tankou kouti rate ak kas fil. Aprann mezi revizyon debaz, ki jan pou tcheke relasyon zegwi ak krochi, ak ki lè ajisteman senp an sekirite pou teknisyen teren.
Visual symptoms of timing and hook problemsMeasuring needle height at hook intersectionChecking hook point clearance and positionSimple timing corrections within safe limitsWhen to escalate to advanced timing serviceLeson 8Lis tcheke zouti ak konsomab pou dyagnostik ak reparasyon sou teren (mezi santiman, chassye vis, lwil oliv, zegwi ranplasman)Prepare pou sèvis sou teren ak yon zouti pratik. Kreye yon lis tcheke zouti men, mezi, lubrifkan, pwodwi netwayaj, ak konsomab tankou zegwi ak vis pou pifò tach dyagnostik ak reparasyon ka fini nan yon sèl vizit.
Essential screwdrivers, wrenches, and pliersFeeler gauges, rulers, and timing scalesOils, greases, and cleaning materialsAssorted needles, screws, and small hardwareOrganizing and transporting a mobile tool kitLeson 9Tès apre reparasyon: pwosedi kouti tès, tès vitès pwogresif, kritè akseptasyon kalite koutiVerifye kalite reparasyon lè l sèvi ak tès kouti kontwole. Aprann pou mete materyèl tès, kouri kouti vitès ba a segondè, evalye balans kouti ak aparans kouti, ak aplike kritè akseptasyon klè anvan retounen machin nan pwodiksyon.
Preparing test fabric, thread, and needle setupLow-speed functional checks and observationsProgressive speed testing and heat monitoringEvaluating stitch balance and seam appearanceDefining pass, rework, and documentation rulesLeson 10Lis tcheke enspèksyon vizyèl etap pa etap ak tès dyagnostik manyèl (wòch men, depoze zegwi, enspèksyon bobin)Sèvi ak yon woutin enspèksyon vizyèl estriktire ak tès manyèl anvan mete machin lan an kouran. Tcheke kondisyon ekstèn, pwoteksyon, filaj, ak pati k ap deplase, apre sa vire wòch men an, teste depoze zegwi, ak enspèkte zòn bobin ak krochi an sekirite.
Exterior, guards, and wiring visual checklistChecking belts, pulleys, and moving clearancesHandwheel rotation feel and noise assessmentNeedle drop alignment and clearance checksBobbin, case, and hook area inspection stepsLeson 11Aksyon korektif komen: refilaj, ranplasman zegwi, ajisteman tensyon, sèvis krochi, lubrifikasyon, ak ranplasman patiPran pratik aksyon korektif ki pi komen yo itilize nan reparasyon teren. Aprann refilaj sistematik, chanjman zegwi an sekirite, ajisteman tansyon, netwayaj ak polisaj krochi, woutin lubrifikasyon, ak ki lè pati mete dwe ranplase olye de ajiste.
Standardized re-threading and path verificationSafe needle removal, fitting, and alignmentFine-tuning upper and bobbin thread tensionsHook cleaning, deburring, and lubrication stepsCriteria for replacing worn or damaged partsLeson 12Kalite fil ak pwopriyete pou denim: fòs tensile, tòde, lubrifkan, gwosè fil apwopriyeEkplòre kalite fil adapte pou denim, tankou poliester, koton, ak corespun. Konpare fòs tensile, tòde, fini, ak gwosè, ak aprann ki jan chwa fil afekte chalè zegwi, paramèt tansyon, durabilite kouti, ak aparans.
Common thread fibers for denim applicationsThread size selection for seams and topstitchingTwist direction, ply count, and seam behaviorLubricants and finishes that reduce frictionMatching thread, needle, and tension settingsLeson 13Kòz chalè ak pliye zegwi: friksyon, zegwi move, pwoblèm revizyon, ak efè wo vitèsKonprann poukisa zegwi chofe ak pliye anba chay, tankou friksyon, chwa zegwi move, erè revizyon, ak twòp vitès. Aprann trase sentòm nan kòz rasin ak aplike ajisteman vize ki anpeche echèk repete.
Friction sources at needle, fabric, and threadEffects of incorrect needle size and point typeTiming errors that overload or deflect the needleHigh-speed operation and inadequate coolingPreventive adjustments and operator guidanceLeson 14Pwosedi sekirite ak tcheke anvan enspèksyon espesifik pou machin lockstitch (blokaj/etikèt, izolasyon elektrik, tès wòch men)Devlope abityid an sekirite anvan manyen yon machin lockstitch. Aplike blokaj ak etikèt, verifye izolasyon elektrik, ak sèvi ak tès wòch men kontwole pou enspèksyon ak ajisteman fèt san risk chòk, anpwazonman, oswa blesi.
Lockout and tagout steps for sewing stationsVerifying power off and residual energy releaseGuarding, PPE, and safe body positioningSafe handwheel rotation and needle clearance testsDocumenting hazards and communicating with operators
