Before commissioning three needle five thread stretch sewing machine, first of all, we want to confirm the accuracy of the machine to meet the use requirements. First replace the original authentic qualified parts, so that the accuracy of the machine to keep the state close to the factory with the gap from the difference between the larger equipment factory state. You can then check the positioning of the various parts of the size as well as mutual cooperation opportunity accordance with the requirements of the manual.

　　Here, the author based on personal experience, manual adjustment requirements focus on finishing and supplemented (some references may differ) described in the description.

　　Needle and looper meet the timing adjustment

　　Machine needle and looper meet timing adjustment, the most important and most easily overlooked when the needle dropped to the lowest point of the looper must move to the right to the farthest limit positions, rising to the highest Similarly, when the needle curved needle point must be moved to the left limit position to the farthest this repeated observation confirmed.

　　Addition to have about the operation of the curved needle (toward the operator) before (away from the action of the operator). Then we should pay attention to the movement limit position in the fastest time to move around the curved needle placed around the curved needle, make curved needle before and after moving action in the bent needle is moved leftward to reach the position of the machine needle minimum.

　　At this point, we should pay attention to the balance between the left and right limit position, is necessary to prevent the looper moves to the left Guaceng needle, but also to prevent the the curved needle moves to the right Guaceng needle too much. Of course, we can also match the size of the amount of movement and slightly clockwise rotation of a little needle bar before and after adjusting looper angle to achieve the best results. Range of some machines can adjust the looper moves back and forth, some machines can not.

　　When the needle dropped to the lowest position, bend the needle tip from the right needle 3mm-4mm. When the rising needle looper moves to the left, bend the needle tip reaches the right center of the needle bend the needle tip in the needle below the eye of a needle on top 2.5mm. The gap between looper and needle 0 ~ 0.05mm.

　　When the needle down to reach the back of the looper, the left needle eye of a needle and curved needle threading hole meet. At this point, the back of the looper allows slight contact with needle but best not Guaceng, or as slight as possible.

　　The Rear Guards needle adjustment

　　Need to follow the principles of the needle guard before and after adjustment fancy contour: front and rear needle guard from the direction of the operator should be consistent with the connection of the needle tip, one side in order to prevent the machine needle jitter bar near the needle, the needle guard on the needle guard should be appropriate chamfer. The front (close to the operator) of the needle guard should play both the role of the needle guard also play a role in blocking the smooth formation of the sewing thread in the machine in front of the needle eye of the needle (close operation) to form a wire loop, the wire loop behind the machine needle pinholes. After the needle guard both played the role of the needle guard can not block the smooth formation of the Central Line.

　　Since the differences of different producers and machine model, the shape of the front and rear needle guard allows the adjustment range of different ideal state there are some gaps, maintenance personnel in specific cases, as much as possible to move closer to the need to follow the principle of.

　　When the needle is moved downward, the front and rear needle guard to the direction away from the machine needle movement; When the machine needle is rising from the lowest position, the front and rear needle guard to the close to the direction of the needle movement.

　　Needle guard should escape the needle when the needle down to the location of the needle guard to avoid Guaceng needle.

　　In addition, when bending tip is moved to the left to the right needle position, the gap between the needle guard and the needle of the needle guard before and after work, the front (close to the side of the operator) is 0.1mm-0.3mm, the needle guard and machine The gap between the needle 0 ~ 0.1mm.

　　Looper thread take-up cam adjustment

　　Looper thread take-up cam design because each plant is different, some with the actual size and shape may be some gap, the gap is too large, are likely to cause the jumper and increase maintenance difficulty.

　　Role looper thread take-up cam: mobile and braided wire a timely manner to the looper when the looper moves to the left line of sewing thread trace need, when curved needle moves to the right in a timely manner to recover the excess sewing thread .

　　Need to pay special attention to the need to use: In order to facilitate the triangular wire loop of the needle into the back of the looper, the looper thread take-up cam needle into triangular wire loop, looper state of tension. But tension over cause the looper thread disconnection and looper thread tight in the back of the sewing material seems.

　　The right to adjust the standard of the looper thread take-up cam: When the needle down, left needle tip reaches the looper edge is just securely enter triangular wire loop, looper thread take-up cam on the looper thread take-up cam the highest point.

　　Speed of looper thread take-up cam can do minor adjustments on the basis of the above criteria, in accordance with its own direction of rotation tune fast sewing the back stitch seemed more relaxed looper thread tension, on the contrary, it appears that bend the needle thread tension is tight.

　　Stretch needle and stretched the needle thread board of adjustment

　　Some brands of machines, stretch needle and needle with timing can be adjusted. The Tongyu F007 three needle five lines stretch sewing machine, for example, by adjusting the stretch needle cam (F00710004) relative to the axis of the front section (F00708001) angle to adjust the timing baste and machine needles with purpose. The best time to tie stretched the needle began to move to the right when entering the stretch needlework ring when the decline of the needle, right needle.

　　The the stretch needle swing amplitude must ensure that: when hooked stretched needlework, returns to the left of the the stretch needle swing to the right-most limit position to stretch when the stretch needle swing to the left-most point of a needle to the left needle distance of 4.5mm-5.5mm.

　　Stretched needle mounting height should be possible to rely on but the gap between the stretched needle above and stretched the needle over the line board following should enable stretched needlework successfully passed.

　　When the stretch needle over the line board mounting height should enable stretched needlework in the needle up to the highest point, the right needle smooth slide into the back of the right needle tip (away from the operator\'s side), so that the right needle drops easily pinned stretched needlework.

　　When stretched the point of a needle to swing to the left in front of the needle, the gap between the left needle and stretched needlepoint 0.5mm-0.8mm.

　　Feed motor coordination

　　Stretch Sewing Machine accurate feed action can reduce the probability of the needle jump phenomenon. The impact equipment daily feed action with the height of the feed dog, presser foot pressure, differential feed, stitch length density is closely related to the use of speed.

　　Propose a theory: the the looper back of the triangular wire loop stability depends on the stability and the thread take-up cam feed action correctly with. If the feed action is unstable, triangular wire loop is deformed or suddenly big and small, so that the needle can not enter triangular wire loop.

　　Adjust the feed dog height to grasp the principle is: when the feed dog to completely return from the needle plate, feed action is completed any sewing regressive actions are not allowed. The presser foot pressure to ensure that the the sewing material does not slip to the operator side action. Sewing elastic sewing or operator sewing excessive force to pull his arms, we should increase the device differential feed amount. Needle ring also from the small triangle line, so the density should be appropriate, and in the extent possible, should not small. Too fast will make sewing flighty or instant suppress the presser foot, thus affecting the stability of the Central Line.