Brother LH4-B800E Service Manual download pdf (Page 99)

LH4-B800E

4 - 12

4. Adjustment

Upper thread trimming adjustment procedure

Adjusting the presser foot home

position sensor position 4-3

(1) (1)

Adjusting the longitudinal feed arm

assembly position 4-13-1

(2) (2) (1)

Adjusting the trimmer driving arm

assembly position 4-13-2

(3) (3) (2) (1)

Adjusting the lateral position of the upper thread

scissors at the sewing start 4-13-3

(4) (1)

Adjusting the longitudinal position of the upper

thread scissors 4-13-4

(5) (1)

Adjusting the cutting depth of the upper thread

scissors 4-13-5

(6) (1)

Adjusting the installation height of the upper

thread scissors 4-13-6

(7) (1)

Adjusting the upper thread scissors gradual

opening timing 4-13-7

(8) (4) (3) (2) (2) (1)

Adjusting the upper thread scissors opening

timing

4-13-8

(9) (5) (4) (3) (1)

When adjusting for the first time

4-13. Adjusting the upper thread trimming

When the home position sensor position

has been changed

When the longitudinal feed arm position has

been changed

When the trimmer driving arm position has

been changed

When the lateral position of the upper

thread scissors has been changed

When the longitudinal position of the up-

per thread scissors has been changed

When the cutting depth of the upper thread

scissors has been changed

When the installation height of the upper

thread scissors has been changed

When the gradual opening timing of the

upper thread scissors has been changed

When the opening timing of the upper

thread scissors has been changed

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Brother LH4-B800E Service Manual Page 99

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