Troubleshooting - Silvercrest KH 4300 Operating Instructions Manual

Troubleshooting

Problem
Needles break
Thread breaks
Stitches are omitted
Stitches are irregular
Seams cause wrinkles
Material is not cut off cleanly
Material edges ruffle them-
selves
Cause
• Needles are bent, blunt or da-
maged at the points.
• Needles are not correctly inserted.
• You have pulled the material too
heftily.
• Yarn has not been correctly
threaded.
• Thread tension is too high.
• Needles are not correctly inserted.
• Needles are bent, blunt or da-
maged at the points.
• Needles are not correctly inserted.
• Yarn has not been correctly
threaded.
• Incorrect needles are fitted.
• Thread tension is not correct.
• Thread is trapped.
• Thread tension is too high.
• Yarn has not been correctly
threaded.
• Thread is blocked.
• Differential feed motion not
adjusted.
• Upper blade a is blunt or in-
correctly inserted.
• Too much material in a stitch.
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Solution
• Fit new needles.
• Insert the needles into the retainers
correctly.
• Carefully guide the material with
both hands.
• Thread the yarn correctly.
• Reduce the thread tension.
• Insert the needles into the retainers
correctly.
• Fit new needles.
• Insert the needles into the retainers
correctly.
• Check the course of the individual
threads.
• Use the correct needles (HA x 1
or 130/705H)
• Correct the thread tension.
• Check the course of the individual
threads.
• Adjust the thread tension.
• Thread the yarn correctly.
• Check the course of the individual
threads.
• Place the differential feed motion
at "S".
• Change the blade a or insert it
correctly.
• Alter the seam width.