Maintenance
Before you call for help: Trouble and corrective measures
The following problems should not be regarded as the machine trouble. Check the following table before you call for
help from us.
Trouble Cause (reason) Corrective measures Page
Fabric does not feed • Presser foot pressure is too low. • Increase the presser foot pressure
by turning the presser foot pressure
adjusting screw to the right.
14
Needles break • Needles are bent, or the needle point is blunt.
• Needles are incorrectly attached.
• The material cloth is excessively stretched.
• Replace the needles.
• Attach the needle correctly.
• Hold the edge of the material cloth
lightly with your hand when sewing.
15
15
-
Thread breaks • The machine is incorrectly threaded.
• Thread tension is too high.
• Needles are incorrectly attached.
• Rethread the machine correctly.
• Adjust the thread tension properly.
• Adjust the needles correctly.
16-21
24,25
15
Stitch skips • Needles are bent or needle point is blunt.
• Needles are incorrectly attached.
• The machine is incorrectly threaded.
• Replace the needles.
• Attach the needle correctly.
• Rethread the machine correctly.
15
15
16-21
Poor stitches are for
-
mation
• Thread tension is not proper. • Adjust the thread tension properly. 24,25
Seams flute or wave,
especially when sew
-
ing knits
• Presser foot pressure is too high.
• Differential feed is set incorrectly.
• Reduce presser foot pressure.
• Adjust differential feed to N - 2.
14
28
Seams pucker • Thread tension is too high.
• Differential feed is set incorrectly.
• Set the thread tension adjusting dial
to the smaller value.
• Adjust differential feed to 0.7 - N.
24,25
28
Motor trouble • The motor makes noise.
• The motor will not rotate.
• Unusually large sparks are emitted.
• Replace the carbon brush. -
When the trouble is not corrected by the above measures, contact your local dealer.
32
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