How to deal with eyelet buttonhole sewing machine lock failure?

Round head lockstitch machine normal work traces of neat, clear, cross-listed parts into a straight line, the left and right side of the needle trace to be equal in length, and to be positive, the round head part to be round and centered relative to the knife.

Enterprises for the equipment factory commissioning requirements: when the machine is cut after the state, the inner trace leaves the space of the knife, cutter traces in the inner two rows of stitches between the left and right symmetry, and in the round head of the inner and center. When the machine for the first cut state, the inner stitches should be reunited into a straight line, the cutter traces should be exactly cut on the inner traces and uniformly around the outside of the round head.

The so-called eyelet buttonhole sewing machine lockout of the "round head is not round", refers to the round head part of the relative knife and the cross-stream stitch asymmetry, to the left or right out. In my opinion, to solve this phenomenon can be checked and adjusted according to the following steps.

Step 1: check the effect of the presser foot pressure cloth

The presser foot should be reliable when pressing the cloth, if the presser foot can not press the cloth, then the cloth will be skewed when sewing with the round head lockstitch machine, so it is impossible to ensure that the stitches are beautiful and the round shape of the round head is smooth.

Step 2: Check the effect of the cutter

When the machine is working normally, the cutting fabric should be neat and sharp, please check the knife blade of the round head lockstitch machine regularly to see if it is sharp; the knife block should be sharpened to make sure: the outline of the knife blade is visible on the knife block.

In practice, the round head lockstitch machine "round head lock not round" is often because the knife block is not ground well, resulting in a poor cutting effect.

Step 3: Check the cam disk clearance

Round head locking machine cam disk part of the structure: the following is the cam disk seat, which plays the role of transmission, and support; the middle is the lower control cam disk, its role is to control the cross-tail or straight tail; the top is the upper control cam disk, its role is to control the round head or flat head.

The positioning of the two cam discs relies on two pins, one of which is fastened by a nut below the positioning pin, check whether the nut is fastened reliably, and then, using the hand to determine the cam disc of the left and right swaying gap, under the condition of ensuring that the machine runs lightly and smoothly, the smaller the gap the better.

In general, the machine does not suffer serious wear and tear, this gap does not need to be adjusted. For long-term use and wear, the gap is a larger machine, which can be adjusted as follows:

There is a worm gear seat cover under the cam seat, in which the worm gear engages with the worm gear, loosen the three tightening screws of the worm gear seat cover, and adjust the locating screw on the worm gear seat cover. If this screw is screwed out, the center distance between the worm wheel and worm gear decreases, and the meshing clearance decreases, and vice versa.

When the above pressure foot, cutter, and cam disk clearance factors are ruled out, the source of the eyelet buttonhole sewing machine lock round head is not round the reason is the upper control cam disk time phase position is not right.

Adjustment method: if the round head is to the left, adjust the upper control cam disk phase a little earlier, and adjust the from the rear of the machine, the cam disk to the clockwise direction to turn a little bit, the adjustment should be tightly fixed firmly.

If you need to purchase an eyelet buttonhole sewing machine, you can choose DAPSEW.

you can contact:

Email: evan@dapsew.com

WhatsApp: +8613186027908