Brother International T-8422C Instruction Manual - English - Page 74

Thread take-up amount for thread take-up spring, < Adjustment method &gt

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13. STANDARD ADJUSTMENT 13-2. Thread take-up amount for thread take-up spring < Measurement method > 3014M Pass upper thread through thread take-up The standard thread take-up length for thread take-up springs R (1) and L (2) is 7 mm. You can adjust the thread take-up amounts by changing the heights of the stopper [right] (3) and the stopper [left] (4). * The standard heights of the stopper [right] (3) and the stopper [left] (4) are when the are aligned with the tension stud (5). < Adjustment method > The thread take-up amount for a thread take-up spring decreases when the height of the stopper is increased. Height of stopper [right] (3) [for right thread] 1. Loosen the screw (6), and then slide the stopper [right] (3) to adjust the thread take-up amount. 2. Tighten the screw (6). Height of stopper [left] (4) [for left thread] 1. Loosen the screw (7), and then slide the stopper [left] (4) to adjust the thread take-up amount. 2. Tighten the screw (7). 35mm or more Pull Trailing thread 3015M NOTE: If using a thread trimming sewing machine, the trailing length for the left upper thread may become shorter after thread trimming because of the twist in the thread. The trailing length is normal if the upper thread length is 35 mm when the thread is pulled from the needle hole. If the thread length is shorter than this, reduce the thread take-up amount of the thread take-up spring. However, if using fine threads (such as #50 polyester thread or finer), reducing the thread take-up amount too much may cause the right upper thread to be cut too short, or it might result in thread trimming errors for the left upper thread. 3016M 65 T-8421C, 8422C, 8452C, 8722C, 8752C

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T-8421C, 8422C, 8452C, 8722C, 8752C
13. STANDARD ADJUSTMENT
65
13-2. Thread take-up amount for thread take-up spring
The standard thread take-up length for thread take-up
springs R (1) and L (2) is 7 mm. You can adjust the thread
take-up amounts by changing the heights of the stopper
[right] (3) and the stopper [left] (4).
* The standard heights of the stopper [right] (3) and the
stopper [left] (4) are when the are aligned with the tension
stud (5).
< Adjustment method >
The thread take-up amount for a thread take-up spring
decreases when the height of the stopper is increased.
Height of stopper [right] (3) [for right thread]
1. Loosen the screw (6), and then slide the stopper [right] (3)
to adjust the thread take-up amount.
2. Tighten the screw (6).
Height of stopper [left] (4) [for left thread]
1. Loosen the screw (7), and then slide the stopper [left] (4)
to adjust the thread take-up amount.
2. Tighten the screw (7).
NOTE:
If using a thread trimming sewing machine, the trailing
length for the left upper thread may become shorter after
thread trimming because of the twist in the thread.
The trailing length is normal if the upper thread length is
35 mm when the thread is pulled from the needle hole. If
the thread length is shorter than this, reduce the thread
take-up amount of the thread take-up spring.
However, if using fine threads (such as #50 polyester
thread or finer), reducing the thread take-up amount too
much may cause the right upper thread to be cut too short,
or it might result in thread trimming errors for the left upper
thread.
< Measurement method >
3015M
3014M
3016M
35mm or more
Pull
Trailing thread
Pass upper thread through
thread take-up