Brother International CB3-B917 Service Manual - Page 14

1-8. Button clamp mechanism 1-8-1. Button clamp descent (sewing start) Button clamp lifter arm Button clamp regulating plate Button clamp arm assembly Spring Button clamp lifter 7 connecting rod 9 10 Button clamp presser spring 1. MECHANICAL DESCRIPTIONS Button clamp driving lever 8 Button clamp driving connecting rod Button clamp driving lever Clutch shaft 4 5 Clutch 3 Operating lever pawl 6. Pawl is disengaged and arm is raised by tension spring. Driving link 1-8-2. Button clamp lift (machine stop) 127s 2 Clutch lever 1. Depress pedal Button clamp lifter arm Button clamp regulating plate Button clamp arm assembly 9 Button clamp lifter 5 connecting rod 7 8 1 Button clamp driving lever 6 Button clamp driving connecting rod Number of stitches control lever Clutch shaft Button clamp driving 2 lever Driving cam 3 Button clamp operating fork 128s Driving link 4. Pawl is caught and lever is pulled down. CB3-B916A/B917A 8