Singer 14T957DC User Manual

104 73 06-26
16 March 2010
© 2010 Singer Company Ltd- All Rights Reserved.
Service Manual
14T957DC
14T967DC
14T968DC - Professional 5

Singer 14T957DC Specifications

General

Type	Overlock
Sewing Speed	1300 stitches per minute
Differential Feed	Yes
Number of Needles	2
Adjustable Stitch Length	Yes
Adjustable Stitch Width	Yes
Stitch Types	Overlock, Rolled Hem
Included Accessories	Tweezers, Screwdriver
Number of Threads	4

Summary

Presser Bar Height Adjustment

Check Presser Bar Height

Verify the 4.4 mm gap between needle plate and presser foot.

Setting Presser Bar Height

Adjust presser bar using screws to achieve correct gap.

Needle Bar Height and Parallelism

Check Needle Bar Height and Parallelism

Ensure 10.8 mm distance from needle tip to plate and needle holder alignment.

Setting Needle Bar Height

Adjust needle bar position for correct height and alignment.

Test Needle Bar Parallelism

Check needle holder parallelism and clearance from needle plate.

Needle Timing Adjustment

Check Needle Timing

Verify needle tip level with plate and feed dog movement.

Setting Needle Timing

Adjust eccentric screws for precise needle timing.

Lower Looper Height Adjustment

Check Lower Looper Height

Measure distance from looper point to drive shaft hole (61.3-62.0 mm).

Setting Lower Looper Height

Adjust lower looper position for correct vertical distance.

Lower Looper to Needle Clearance (A)

Check Lower Looper to Needle Clearance (A)

Ensure 2.6 mm gap between lower looper tip and 'A' needle.

Setting Lower Looper to Needle Clearance (A)

Adjust looper lever screw for correct clearance.

Looper to Needle Clearance

Check Looper to Needle Clearance

Verify 0-0.03 mm clearance when looper is in needle scarf.

Setting Looper to Needle Clearance

Adjust looper lever and needle guard for precise clearance.

Lower Looper Timing

Check Lower Looper Timing

Ensure looper point is 1 mm outside needle left side at specific points.

Setting Lower Looper Timing

Adjust eccentric screws for correct looper timing.

Lower Looper Needle Guard Clearance

Check Lower Looper Needle Guard Clearance

Verify 0-0.08 mm clearance between needles and front needle guard.

Setting Lower Looper Needle Guard Clearance

Adjust front needle guard position for specified clearance.

Upper Looper Position to Left Needle

Check Upper Looper Position

Ensure 4.6 mm distance between upper looper point and left needle.

Setting Upper Looper Position

Adjust upper looper arm for correct distance to left needle.

Upper Looper Timing

Check Upper Looper Timing

Verify 0.8-1.0 mm clearance between upper and lower looper points.

Setting Upper Looper Timing

Adjust upper looper eccentric for correct timing.

Upper and Lower Looper Clearance

Check Upper and Lower Looper Clearance

Ensure 0.05-0.2 mm clearance between upper looper point and lower looper back.

Setting Upper and Lower Looper Clearance

Adjust upper looper position for specified clearance.

Chain Stitch Looper Height

Check Chain Stitch Looper Height

Measure 58.7-60.2 mm distance from looper point to drive shaft.

Setting Chain Stitch Looper Height

Adjust chain stitch looper for correct vertical distance.

Chain Stitch Looper to Left Needle Clearance

Check Chain Stitch Looper to Left Needle Clearance

Ensure 2.6 mm gap between chain stitch looper tip and 'C' needle.

Setting Chain Stitch Looper to Left Needle Clearance

Adjust chain stitch looper for correct clearance.

Chain Stitch Looper to Needle Clearance

Check Chain Stitch Looper to Needle Clearance

Verify 0-0.03 mm clearance when chain stitch looper is in needle scarf.

Setting Chain Stitch Looper to Needle Clearance

Adjust chain stitch looper lever for specified clearance.

Chain Stitch Ellipsoidal Movement

Check Chain Stitch Ellipsoidal Movement

Ensure chain stitch looper shaft is at its most back position.

Setting Chain Stitch Ellipsoidal Movement

Adjust eccentric for correct ellipsoidal movement.

Chain Stitch Needle Guard to Needle Clearance

Check Chain Stitch Needle Guard to Needle Clearance

Verify 0-0.08 mm clearance between needle and chain stitch front needle guard.

Setting Chain Stitch Needle Guard to Needle Clearance

Adjust front needle guard for specified clearance.

Feed Timing Adjustment

Check Feed Timing

Verify front feed dog position at highest point before backward movement.

Setting Feed Timing

Adjust front feed dog for equal height at both positions.

Feed Dog Height Adjustment

Check Feed Dog Height

Ensure rear feed dog is 1 mm above plate, front feed dog 0.2-0.3 mm higher.

Setting Feed Dog Height

Adjust rear feed dog for correct height relative to needle plate.

Lower Knife Adjustment

Check Lower Knife Alignment

Verify lower knife cutting edge is aligned with needle plate surface.

Setting Lower Knife Alignment

Adjust lower knife for alignment with needle plate.

Upper Knife Adjustment

Check Upper Knife Overlap

Ensure upper and lower blades overlap by 1.0-0.5 mm.

Setting Upper Knife Overlap

Adjust upper blade position for correct overlap.

Lower Looper Lower Thread Guide

Check Lower Looper Lower Thread Guide

Ensure left side of brackets is flush with the right side.

Setting Lower Looper Lower Thread Guide

Adjust thread guide position until correct measurement is achieved.

Upper Looper Lower Thread Guide

Check Upper Looper Lower Thread Guide

Align lower/upper thread guides (1mm gap) and check distance to cover bracket (2.5mm).

Setting Upper Looper Lower Thread Guide

Adjust thread guide for correct alignment and distance.

Upper Looper Upper Thread Guide

Check Upper Looper Upper Thread Guide

Verify 1.5 mm distance between upper and lower thread guides.

Setting Upper Looper Upper Thread Guide

Adjust upper loopers thread guide to correct position.

Chain Stitch Loopers Thread Take Up

Check Chain Stitch Loopers Thread Take Up

Ensure 1.5 mm clearance from the right chain stitch looper.

Setting Chain Stitch Loopers Thread Take Up

Adjust thread take up for 1.5 mm clearance.