4 of 271
Z-TIMING: Bottom Center & Head-Up 87
Bottom Center (Z Timing) 87
Z-Drive Belt Tensioning 92
Inspection and Adjustment 92
Z-Home Adjustment 94
Procedure to Identify the Closest Needle 95
Needle Case Calibration 98
Fine calibration procedure: 98
Rough Calibration Process: 99
Rotary Hook Support Adjustment 101
Inspection Procedure 101
Adjustment Procedure 103
Color Change, Take-Up, Feeder Housing Assembly 105
Replacement Procedure for Entire Color Change/Take-Up/Feeder Assembly: 105
Color Change Linear Actuator Replacement 107
Replacement Procedures: 107
Thread Feeder Gear Replacement 110
Replacement Procedures: 110
Thread Feeder Optical Sensor PCB Replacement 112
Replacement Procedure: 112
Thread Feeder Radial Bearing Replacement 113
Replacement Procedures: 113
Thread Feeder Stepper Motor Assembly 114
Replacement Procedure: 114
Laser Pointer Assembly 116
Replacing the laser assembly: 116
LED Cluster PCB Replacement 118
Presser Foot Assembly Replacement 119
Reciprocator 122
Replacement Procedure 122
Take-Up Lever Cam Replacement 124
Replacement Procedure 124
Z-Drive Repair and Adjustment 127
Z-Drive Belt Replacement and Tensioning 127
Z-Home Sensor PCB Replacement 129
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