JUKI LU-2810 - 29. NORMAL-;REVERSE-FEED STITCH NEEDLE ENTRY POINTS ALIGNMENT AT THE TIME OF AUTOMATIC REVERSE FEED STITCHING (LU-2810-7, LU-2860-7); How to align needle entry points; Reverse feed stitching speed on the basis of stitch pitch

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29. NORMAL-/REVERSE-FEED STITCH NEEDLE ENTRY POINTS
ALIGNMENT AT THE TIME OF AUTOMATIC REVERSE FEED
STITCHING (LU-2810-7, LU-2860-7)
Whenthesewingspeedorstitchpitchischanged,thenormal-andreverse-feedstitchneedleentrypoints
maynotbealignedatthetimeofautomaticreversefeedstitching.
Insuchacase,correctthealignmentofneedleentrypointsbychangingtheON/OFFtimingoftheautomatic
reversefeedcylinder.Ifitisdifculttocorrectthetimingoftheautomaticreversefeedcylinderbecauseof
thelargestitchpitch,itisrecommendedtodecreasethereversefeedstitchingspeed.
Referto"III-8.Detailedexplanationofselectionoffunctions
⑯
Compensationoftimingofthesolenoidfor
reversefeedstitching"intheInstructionManualfortheSC-922fordetail.
Normal-andreverse-feedstitchesmayneedtobeadjustedaccordingtothestitchpitchtobeused.Referto
theEngineer'sManualforhowtoadjustthestitches.
1) Howtoalignneedleentrypointsofthereversefeedstitchingwiththoseofthenormalfeedstitching
 Carryout"correctionofthetimingofthereversefeedstitching"accordingtothedifferencebetweenthe
needleentrypointsofthereversefeedstitchingandthoseofthenormalfeedstitching.
 Referto"III-6.SettingtheSC-922functions"intheInstructionManualfortheSC-922forhowtocarry
outthe"correctionofthetimingofthereversefeedstitching".
2) Reversefeedstitchingspeedonthebasisofstitchpitch
 ThisspeedcanbechangedusingFunctionsettingNo.8.
Defaultvalue Recommendedvalue Recommendedvalue
Stitchpitch(mm) 3to6 7to8 9
Reversefeedstitchingspeed(sti/min) 600 500 400
②
 CorrectionoftheOFF-timingof
thereversefeedstitchingatthe
beginningofsewing(Function
settingNo.52)
③
 CorrectionoftheOFF-timingof
thereversefeedstitchingatthe
endofsewing(Functionsetting
No.53)
Sewing starting position
Stitch length
is smaller
Decrease the set
value of No. 51.
Increase the set
value of No. 51.
Decrease the set
value of No. 52.
Increase the set
value of No. 52.
Stitch length is
smaller
Decrease the set
value of No. 53.
Increase the set
value of No. 53.
Stitch length is
smaller
Sewing end
position
①
 ON-timingofthereversefeed
stitchingatthebeginningof
sewing(FunctionsettingNo.51)
Stitch length is smaller
Sewing end
position