In the sewing work, sometimes the cloth does not move forward, but moves in the direction of the operator, that is, the cloth moves backward

Source: Time:2018-09-20 14:03:33 frequency:

在缝制工作中有时出现衣料不向前走动,反而向操作者方向移动,即衣料向后退。产生这种故障是由于上轴曲拐与凸轮偏心螺丝的角度不对。牙齿所以能够有节奏地向前移动.完全是靠送布凸轮的拨动。因凸轮本身是偏心的。所以使牙叉前后拨动,而牙叉又带动送布轴和牙架,促使牙齿前后往复运动。由此可见,凸轮的偏心位置是非常重要的。 上轴曲拐与凸轮螺丝的标准角度。只要把凸轮螺丝与上轴曲拐的夹角调到260-300的位置,衣料就不会向后退了。 调整时,把机头后盖向下扳开,就可看见送布凸轮,把螺丝刀插入机壳内部,将送布凸轮螺丝松开,然后把螺丝拨到与上轴曲拐成260-300的位置,再拧紧凸轮螺丝。
In the sewing work, sometimes the cloth does not move forward, but moves in the direction of the operator, that is, the cloth moves backward. This failure occurs because the angle between the upper shaft crank and the cam eccentric screw is not correct. Therefore, the teeth can move forward rhythmically. It is completely driven by the feeding cam. Because the cam itself is eccentric. Therefore, the tooth fork is moved back and forth, and the tooth fork drives the feed shaft and the tooth frame to promote the reciprocating movement of the tooth. This shows that the eccentric position of the cam is very important.
The standard angle between the upper shaft crank and the cam screw. As long as the angle between the cam screw and the crank of the upper shaft is adjusted to the position of 260-300, the clothing will not move backwards.
When adjusting, pull the back cover of the machine head down to see the feed cam, insert a screwdriver into the casing, loosen the feed cam screw, and then turn the screw to 260-300 with the upper shaft Position, and then tighten the cam screw.
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