松线器挺线调节（图 33）/ Adjust Opening Time Of The Tension Discs（Fig 33; 上送料机构的调节（图 34）/Adjusting The Tension Releasing Mechanism（Fig 34 - Jack H2 Series Product Instruction Manual

23.松线器挺线调节（图 33）/ Adjust opening time of the tension discs（Fig 33）
压脚在提升范围内，夹线器上的夹线板有一
个张开期，挺线的时间可进行调节。调节时，先
卸下机头背面的橡皮擦，用螺丝刀（B）旋松膝控
提升杠杆（左）螺钉（A） ，这时松线凸轮可以左
右转动，往右移挺线慢，往左移挺线快。
The tension discs should be pushed apart to
open when the presser foot is lifted. But the open
timing of the tension discs can be adjusted as
follows: Remove face plate and the rubber plug at
rear side of arm and loosen screw (A) of the knee
lifting lever (left), then the tension releasing cam can
be moved leftward or rightward when the cam is moved right-ward. It is later to open, otherwise it is earlier to
open.
24.上送料机构的调节（图 34）/Adjusting the tension releasing mechanism（Fig 34）
上、下同步送料是该产品的重要性能之一。
在缝纫过程中，应根据各种缝料的摩擦系数的不
同和缝纫工艺的不同要求，对上送料机构的摆压
脚滑块与摆压脚轴的中心距（L）进行调节。
调节方法：
增大中心距 L——上送料量增大。
减小中心距 L——上送料量减少。
对于某些制品的特殊缝纫要求，如缝件的上
层的送料量要求大于（或小于）下层的送料量，
也可以根据以上原理在一定范围内调节使用。
During the sewing, the center gauge (L)
between the walking foot sliding block and its shaft can be adjusted according to the differences of the friction
coefficients of the friction coefficients of materials and the sewing process.
Method: Increase L -- the upper feed amount enlarged
Reduce L – the upper feed amount shorten
For special sewing requirements, for example, the upper layer of material needs more amount than the lower
layer does, in this case, adjustment can be done in the range of above theory for operation.
左
15
33
右
D
34