Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
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Table of Contents
About the Manual ................................................................................................................... 4
Service Manual General Rule ................................................................................................. 4
General Specifications .............................................................................................................. 5
Lubrication of the Hook ........................................................................................................... 6
General Observation of the Front Frame Cover, Mast and Hand Wheel ........................... 6
Replacement of cover ............................................................................................................. 8
Removal of the Front Cover ................................................................................................... 9
Machine Cross Section ........................................................................................................... 11
Adjustment for Y axis:.......................................................................................................... 20
Adjustment for X axis:.......................................................................................................... 20
Loop Lift ............................................................................................................................... 27
Needle Hook Reference ........................................................................................................ 28
Loop Lift, Hook, Tension Illustration................................................................................... 29
Bobbin Case Tension Adjustment ........................................................................................ 30
Understanding Top Tension.................................................................................................. 31
Thread Shredding & Breaking Issues ................................................................................... 32
Skipped Stitches.................................................................................................................... 33
Proper Stitch formation:.................................................................................................... 33
Four major causes of skipped stitches: ............................................................................. 33
More Causes of Skipped Stitches: .................................................................................... 33
Four things required for proper machine timing setting: .................................................. 34
Stitch Regulator ...................................................................................................................... 36