S-7300A
4. MECHANICAL DESCRIPTIONS
48
4-7. Tension release and presser foot mechanism (Premier specifications)
(Presser foot is raised using the
lifting lever)
<1> Presser bar lifter lever
<10> Tension release plate
<11> Tension release stud assembly
<12> Tension release pin
<13> Tension disc presser
<14> Tension disc (Lifts up)
When the presser foot 12 is lowered, the
presser bar lifter lever spring (1)
causes the tension release plate <10> to
return.
When the thread trimming signal turns off,
parts such as the tension release wire [2]
return to their original positions.
(Presser foot is raised using the
knee lifter plate assembly)
1. Knee lifter plate assembly
2. Knee lifter lever
D
3. Knee lifter connecting rod
4. Knee lifter F
5. Knee lifter R
6. Knee lifter bar
7. Knee lifter lever
D
8. Knee lifter connecting rod
9. Presser bar lifter lever
10. Lifting plate
11. Presser bar
12. Presser foot
(Raised)
(2) Presser bar lifter lever spring
(Thread trimming signal is input)
[1] Thread trimmer solenoid
[2] Tension release wire
[11] Tension release stud A
[12] Tension release pin A
[13] Tension disc presser
[14] Tension disc (close)
<Premier specifications>
1262D
