Before You Call For Service.20 - Riccar Serger Instruction Manual

BEFORE YOU CALL FOR SERVICE
Your new overlock sewing machine was carefully inspected and tested at the factory and was in perfect working
order when shipped.
Under normal conditions, if you carefully follow instructions for threading, operating and maintenance, your
machine will give you years of trouble-free service.
Occasional difficulties are usually caused by a condition that can be easily remedied with a minor ad|ustment.
Some possible problems, their causes and corrections are given here
PROBLEM CAUSE
CORRECTION REF. PAGE
•Needle inserted incorrectly
Reset needle 5
•Thread tensions are too tight
Loosen thread tensions
11, 14.
THREAD BREAKS
15
•Bent or blunt needle
Insert new needle 5
•Machine not properly threaded Rethread machine
6-9
•Threads are caught in incorrect guide
Rethread machine
6-9
•Bent or blunt needle
Insert new needle 5
•Needle inserted incorrectly
Reset needle 5
MACHINE SKIPS
•Pressure on foot insufficient Increase pressure 12
STITCHES •Incorrect needle size or type
Insert correct needle 5
•Machine incorrectly threaded
Rethread machine
6-9
•Tensions set too high Loosen thread tensions
11,14.
15
•Pulling fabric while sewing Do not pull fabric
10
NEEDLE BREAKS
•Incorrect size needle or thread for Choose correct needle 5
fabric being sewn and thread
•Needle inserted incorrectly Reset needle
5
MACHINE DOES NOT •Pressure on presser foot insufficient Increase pressure
12
FEED PROPERLY
•Lower knife is dull
Change lower knife
19
•Stitch length not suitable for fabric
Readjust stitch length 12
FABRIC PUCKERS
•Thread tensions are too tight Loosen thread tensions
11.14,
15
12
•Seam width not suitable for fabric
Readjust seam width
1
-
■
LOOSE STITCHES OR •Tensions not adjusted properly
Check thread tensions 11.14.
LOOPS FORMED
15
MACHINE RUNS
•Dirt or lint in stitching mechanism Clean the machine 18
HEAVILY
MACHINE WILL NOT •Cord not plugged into electrical outlet Check plug
4
SEW
20