7. 調整送布齒差動比
向左或向右搬動差動扳手可變換差動比，
在刻記 4”與“5”之間，
主送布齒與副送布齒差動比為 1：1。
向“9”方向搬動差動比加大(縮縫)
向“1”方向搬動差動比減小(伸縫)
螺樁用來限制扳手的搬動範圍
7. Adjusting differential feed dog
Move the differential feed operating lever
right or left to adjust differential feed dog.
The lever between the graduations
“4”and“5”makes the equal movement of the
Main feed dogs and the differential feed dogs.
To make normal differential, move the lever
to“9”.(shrinkage)
To make reverse differential, move the lever
to “1”.(stretch)
The screw is for restrain the lever movement
and keeping the differential movement within its
limitation.
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