Contents
Contents ..................................................................................Chapter - Page
8.02 Commissioning ............................................................................................................. 8 - 9
8.03 Switching the machine on/off ........................................................................................ 8 - 9
8.04 Table top cutout .............................................................................................................8-10
9 Preparation ................................................................................................................... 9 - 1
9.01 Inserting the needle ....................................................................................................... 9 -1
9.02 Winding the bobbin thread / adjusting the preliminary thread tension ............................. 9 - 2
9.03 Removing/Inserting the bobbin case .............................................................................. 9 - 3
9.04 Inserting the bobbin case / Adjusting the bobbin thread tension ..................................... 9 - 3
9.05 Threading the needle thread / adjusting the needle thread tension .................................. 9 - 4
10 Care and maintenance ................................................................................................10 - 1
10.01 Cleaning the machine ...................................................................................................10 - 1
10.02 Checking the oil level / filling in oil ................................................................................10 - 2
10.03 Adjusting the lubrication ...............................................................................................10 - 3
10.03.01 Lubricating the needle head parts .................................................................................10 - 3
10.03.02 Hook lubrication ............................................................................................................10 - 3
11 Adjustment ..................................................................................................................11 - 1
11.01 Notes on adjustment ....................................................................................................11 - 1
11.02 Tools, gauges and other accessories ............................................................................ 11 - 1
11.03 Abbreviations ................................................................................................................11 - 1
11.04 Adjusting the basic machine .....................................................................................11 - 2
11.04.01 Pre-adjusting the needle height ..................................................................................... 11 - 2
11.04.02 Setting the bottom feed dog at its neutral position ........................................................11 - 3
11.04.03 Bottom feed dog motion .............................................................................................. 11 - 4
11.04.04 Bottom feed dog position ..............................................................................................11 - 5
11.04.05 Needle rise, hook clearance, needle height and bobbin case position finger ..................11 - 6
11.04.06 Thread check spring and thread regulator .....................................................................11 - 7
11.04.07 Knee lever stop ............................................................................................................. 11 - 8
11.04.08 Presser foot pressure ...................................................................................................11 - 9
11.05 Adjusting the thread trimmer –900/93 .......................................................................11 - 10
11.05.01 Adjusting the synchronizer ............................................................................................11 - 10
11.05.02 Adjusting the control cam .............................................................................................11 - 11
11.05.03 Position of the stationary knife ......................................................................................11 - 12
11.05.04 Needle thread tension release .......................................................................................11 - 13
11.06 Adjusting the thread wiper –909/93 ...............................................................................11 - 14
11.07 Adjusting the automatic presser foot lift –910/93 .......................................................... 11 - 15
11.08 Adjusting the backtacking mechanism –911/93 ............................................................11 - 16
12 Wearing parts ............................................................................................................. 12 - 1
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