Connecting the working principle of sewing machine

1, 4, respectively by connecting rods and a three CAM wheel, see below, and control of four link 1, 2, 3 and control of the triangle to and fro, cancel the line up, the suture needle moving from a shift () to another, larger acupuncture needle swing control.

2 and coordinated movements. The four parts of the chain sprocket wants to coordinate, is related to cancel the line of the suture, triangle before the shift and suture swinging by coordination, otherwise will appear all sorts of a kind of problems, such as the disconnection, fall, single (double needle sewing), the sleeve seam firmness not...

3 and adjusting method:

A hook, line and up-down adjustment of movement:

Look line is the right of the hook and sports, such as inappropriate can adjust and 1 pole position, the specific method of CAM is put on the screws of the CAM, slightly turn it sent. Then try. But 1 bar of the CAM, 2 after adjusting the length is also attune, namely to look line hook the up and down movement, look around the sewing machine can encounter stitches. If not, change 1 and 2, the length of the rod is to loosen 1 or 2 in the stem rod that one part of the bearing connection, but turn this part, should turn the first half, cannot turn, turn on a rotating after installation, sewing machine that cancels the line before swinging and triangle is appropriate, such as sports, until the right to adjust. But it is not a professional maintenance personnel, or not to the length of the link.
The hook and line movement up and down movement or improper, line not line, hook is hanged to produce off because of phenomenon. Because of high hook line not line, the simplest hang the adjustment method is: the above the adjusting screw nut with knurling rolling method, the flower is with the hungry screw nut on the hex nuts, clockwise unscrew the knurling nut, know to hook and line (but not suture together), then tighten the hex nuts. This is GouGua line not line commonly used methods.
B, the adjustment of the suture shift:

The suture needle refers to the big shift from a needle moving to another chain sprocket. Sewing machine pulley, turning the position of moving a pinprick suture, cannot have the deviation. If there is, will cause break, deviation needle etc. Drop Specific please click below process inspection: the suture needle tip, 3 big needle bar impetus behind slowly to the CAM movement (have), disk is clockwise motion in according to the uniform motion, acupuncture is also slowly, clockwise motion by acupuncture and suture () of the movement is synchronous, i.e. to remain relatively motionless. That, in the process of sport suture in the direction of movement, the suture needle and before the moving is consistent, without any deviation, please click the deviation method adjustment: one is to adjust the number three pole behind the CAM CAM, 2 pieces of hex screws relax a little bit, turning point and CAM slightly a little tight, see, isn't that meets the requirement. If there is no repeat until meets the requirement. 2 3 bar on the components are three holes, also can put screw to other 2 hole test.