送布同步调节（图 30,31,32）/ Synchronous Feeding Adjustment（Fig 30 31 32 - Jack H2 Series Product Instruction Manual

22.送布同步调节（图 30,31,32）/ Synchronous feeding adjustment（Fig 30 31 32）
1、标准位置
转动上轮，降低送布牙（A）, 当和针板表面
（B）相平时，机针（C）的针尖应与针板、送布
牙表面同在一水平面上。
调整可以通过调节送布凸轮和抬牙凸轮的安
装位置进行。
2、抬牙凸轮的安装
打开后盖板，卸下挡油板，用左手逆时针转
动上轮，油孔对上上轴齿轮第二只固定螺钉
（A），以上轴齿轮第二只固定螺钉（A）为基
准，抬牙凸轮的第二只固定螺钉（B）中心，将对
齐（A）中心，稍微向下偏一点。
3、送布凸轮的安装
继续逆时针转动上轮，以抬牙凸轮第二只紧
固螺钉（B）为基准，迸布凸轮的第三只紧固螺钉
（C）中心，将对齐（B）中心， 稍微向上偏一点
（如将两螺孔缺口标记对成一直线亦可）。
1. Standard position
Turn the upper wheel to lower the feed dog (A).
When it is level with the needle plate surface (B), the
needle point of the needle (C) should be on the
same level as the needle plate and the surface of the
feed dog. The adjustment can be carried out by
adjusting the installation positions of the cloth
feeding cam and the lifting cam.
2. Installation of the lifting cam
Open the rear cover, remove the oil baffle, turn
the upper wheel counterclockwise with your left
hand, use the second fixing screw (A) of the upper
shaft gear as the reference, and the center of the
second fixing screw (B) of the lifting cam will be
aligned ( A) The center, slightly lower.
3. Installation of feeding cam
Continue to turn the upper wheel
counterclockwise, and take the second fastening
screw (B) of the lifting cam as the reference, and lay
the center of the third fastening screw (C) of the
cam, which will be aligned with the center of (B), slightly upward ( If the marks of the two screw holes are aligned
in a straight line)
B A
C
14
30
C
31
32
B