Service manual

S-101.M
2-6
Revised: 10/2013
E-mail: [e-mail]; webside: www.amfreece.com
Phone: [phone]; Fax: [phone]
TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSE POSSIBLE SOLUTION
SERVICE
SECTION
Breakage of lower
thread
Incorrect threading Correct it C - 3
Excessive thread tension Adjust it optimal
Damaged needle Replace
Left spreader has axial play Adjust
Damaged left spreader Repair or replace
Damaged threads guide Check - replace damaged part
Incorrectly adjusted trimming knife Adjust it optimal
Needle breakage Weak needle Use properly needle
Needle contact the clamp foot Adjust the play between the needle
and clamps
Needle contact the looper or spreader a) Adjust the play between the needle
and loopers
b) Adjust timming of sewing
Needle support too far Bent for 0,3 mm max.
Sewing stop not adjusted Check adjutment
Incorrectly adjusted needle bar height Adjust correctly
Incorrectly adjusted trimming knife Adjust optimal
4. APPEARANCE DEFECT ON SEWING BUTTONHOLE
SYMPTOM POSSIBLE CAUSE POSSIBLE SOLUTION
SERVICE
SECTION
Buttonhole quality
uctuating
The functional an aesthetic of a buttonhole can be inuenced by the following
factors:
Density of stitches See appropriate adjustment
Number of stitches in eye
Size of material spreading
Sewing distance from buttonhole
Upper and lower thread tension
Used threads
Not even parallel
sides
Clamp plates wrong position Adjust D - 14
Knife outside the centre Adjust D - 13
Not even spreading Adjust
Not even clamp pressure Adjust
Bent needle Replace
Loose cam brakes Adjust D - 4