Trouble Shooting Guide - JUKI MO-2000QVP Instruction Manual

Trouble shooting guide

Problem
The machine • Looper or cloth plate cover is open.
does not sew:
• The main switch is not on.
• The machine is not plugged in.
Fabric does • Differential feed is wrongly adjusted.
not feed • Presser foot pressure is too low.
evenly
Thread • Thread tension is too tight for the
breaks thread being used.
• The machine is not threaded correctly.
• Needles are incorrectly inserted.
• Wrong needles.
Needles • Needles are bent or blunt, points are
break damaged.
• Needles are not inserted correctly.
• Fabric was pulled while sewing.
Skipped • Needles are bent or blunt.
stitches • Wrong needles used.
• Presser foot pressure is too low.
Poor stitch • Threads are not correctly between the
formation tension dials.
• Thread has got caught.
• Machine is incorrectly threaded.
Seams flute • Fabric was pulled while sewing.
or wave, es- • Presser foot pressure is too tight.
pecially when • Differential feed is set incorrectly.
sewing knits
Seams puck- • Needle thread tension is too tight.
er • Differential feed is set incorrectly.
Fabric edges • Too much fabric is in the stitch.
curl • Thread tension is too tight.
• Stitch selection lever is on roll hem.
35
Cause Solution
• Close the looper or the cloth plate
cover.
• Switch machine on. (Main switch to "I")
• Insert plug into main socket.
• Check the differential feed setting.
• Adjust the presser foot pressure.
• Reduce thread tension.
• Check the threading.
• Insert needles fully into needle clamp
with flat side to the back.
• Use needle system 130/705H or JLx2.
• Replace needles.
• Insert needles fully into needle clamp
with flat side to the back.
• Guide fabric gently with both hands.
• Replace the needles.
• Use needle system 130/705H or JLx2.
• Increase presser foot pressure.
• Check if thread is lying between ten-
sion discs.
• Raise the presser foot and pull the
thread.
• Check threading path of each thread.
• Check threading path of each thread.
• Guide fabric gently.
• Reduce presser foot pressure.
• Adjust differential feed to N - 2.
• Reduce the needle thread tension.
• Adjust differential feed to 0.7 - N.
• Reduce cutting width.
• Reduce thread tension.
• Set selection lever to overlock.
Page
9
9
7
14
15
23
17
11
11
12
11
--
11
11
15
16
16
17
17
--
15
14
23
14
13
23
15