The design of super multi-head computerized embroidery […]
The design of super multi-head computerized embroidery machine is not simply to increase the number of heads on the ordinary embroidery machine, but needs to be redesigned. In the development of super multi-head computerized embroidery machine, the following key issues need to be solved:
Driving mode of embroidery frame
Ordinary embroidery machines generally adopt a driving mode of 2 points in X direction and 4 to 5 points in Y direction. The stepping motor drives the embroidery frame to move in the X and Y directions through the pulley. This method is feasible when the embroidery frame is relatively small. However, the width of the embroidery frame has greatly exceeded that of the traditional machine. If the traditional transmission method is still used, it will cause torsional vibration of the embroidery frame and deform the pattern. Therefore, innovative design of the transmission method is required.
Vibration reduction of frame vibration
The working process of the embroidery frame of the embroidery machine is non-continuous, that is to say, it must be stationary every time the needle penetrates the cloth surface. After the needle bar leaves the cloth surface, it requires quick start. Generally, the speed of flat embroidery can reach more than 750 stitches per minute, especially when the number of heads increases and the length of the machine increases, the vibration of the embroidery frame will be more intense, and the vibration of the whole machine is the key to restricting the speed of the embroidery machine.
Increased rigidity of the drive shaft
The number of heads of ordinary embroidery machines is generally within 40. When the number of heads reaches 50, the rigidity of the upper and lower shafts can no longer meet the needs. However, when the number of heads increases to more than 65, the transmission system will undergo a qualitative change. On the one hand, the length of the equipment is greatly increased, and the transmission route is lengthened; on the other hand, when the number of heads increases, the upper shaft needs to drive more heads. The load of the thread take-up lever and the cloth stabbing mechanism, and the load of the thread take-up lever and the cloth stabbing mechanism also change periodically, so the rigidity of the drive shaft, especially the upper shaft, needs to be redesigned.
Computer control system needs to be more flexible
In super multi-head computerized embroidery machines, in order to reduce the length of the equipment, the head spacing is generally relatively small. In order to enable the equipment to embroider large-format patterns, the computer control system is required to be able to set the head embroidery function, that is, to be able to stop several machine heads. Thread breakage and patching are the basic functions of embroidery machines, especially for super multi-head embroidery. If one of the heads is missing and needs to be patched, the computer control system needs to be flexibly set to avoid all heads working together during patching.