Attaching the trimmer, Closing timing of the needle thread trimmer, Opening timing of the needle thread trimmer – SINGER 1371A2 User Manual
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Attaching the trimmer
Loosen setscrew ®, and adjust the height of trimmer ®. Set the height of trimmer ® as
low as possible, provided that it does not touch work clamp check ©, in order to minimize
the length of remaining thread on the needle after trimming.
* Closing timing of the needle thread trimmer
Adjust the closing timing of the needle thread trimmer so that the trimmer completely
colses when it advances farthest.
To perform the adjustment, loosen screw ®, and move needle thread trimmer driving
plate A ® back and forth. When the needle thread trimmer driving plate is moved
towards you, the closing timing is delayed with reduced amount of closing.
(NOTE) Confirm that an allowance of 0.3 to 0.5 mm is left between the blades of the
trimmer when the trimmer has completely closed.
If there is no such allowance, the trimmer would interfere with the operation of the
needle thread trimmer driving plate, preventing smooth movement of lifting lever®.
* Opening timing of the needle thread trimmer
Adjust the timing of the thread trimmer so that the trimmer begins to open gradually at a
distance of approx. 2.5 to 3mm (3/32" to 1/8") from the start.
To perform the adjustment, loosen screw @, and move needle thread trimmer driving
plate B ® back and forth. As it moves towards you, the trimmer begins to open earlier.
(NOTE); Take care not to cause the already fixed needle thread trimmer driving plate A
to get out of position.
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