包装机有立式和卧式之分，立式又有连续式(也叫滚轮式)和间歇式(也叫合掌式)之分，成袋有三边封、四边封、背封，还有一出多列的包装设备。包装设备品种繁多，各设备之间的差异也很大。在实际使用复合膜卷材时，会遇到各种问题，本文详细分析光标问题的产生原因，供参考。
Packaging machine with vertical and horizontal, vertical and continuous type (also called roller type) and intermittent (also called crossing their type), three bags of edge-sealing, four edge sealing, back sealing, there are more than a column packing equipment. Is a great variety of packaging equipment, has a very big difference between various devices. In actual use composite film coil, will encounter all sorts of problems, this article detailed analysis of causes of the problem of the cursor, for your reference.

复合膜卷材的自动包装过程中常常需要进行定位热合和定位裁切，需要设制电眼光标用来定位。光标的大小，不同的包装机会有一定的差异。一般要求光标的宽度大于2mm，长度大于5mm。光标一般选用与底色有较大反差的深色，最好用黑色，一般不能用红色和黄色作光标，也不能用与光电眼光同一颜色的色标作为光标颜色，如光电眼的发光为绿光，就不能用浅绿色的颜色作为电眼光标颜色，因为绿光电眼是不能识别绿颜色的。如果底色是较深的颜色(如黑色、深蓝色、深紫色等)，这时光标应设计成镂空露白的浅色光标。
Composite film coil automatic packaging process often need to locate a thermal and locate the cutting, need a magic eye cursor used to locate. The size of the cursor, different packing chance have certain differences. General requirements of the cursor width is greater than 2 mm, length is greater than 5 mm. Cursor generally choose bigger contrast with the background of dark, had better use black, generally cannot make the cursor with red and yellow, also cannot be used with photoelectric eye color code of the same color as the cursor color, such as photoelectric light for the green light, will not be able to color with the light green color as the magic eye cursor, because does not recognize the green color is green light magic eye. If the background is dark color (like black, dark blue, purple, etc.), then the cursor should be designed as a hollow out the thief the light color of the cursor.

一般的自动包装机的电眼系统是简单的识别系统，不能像制袋机那样具有智能定长的功能，因而在电眼光标纵向范围内，卷膜不允许有任何干扰的文字和图案，否则会引起识别错误。当然有些灵敏度较高的电眼，其黑白平衡可以精密调节，对于一些浅色的干扰信号可以通过调节来去除，但颜色与光标相近或更深色的图案干扰信号是无法去除的。
General electric eye system of automatic packing machine is a simple recognition system, not like the bag making machine has the function of intelligent fixed, therefore in the magic eye cursor vertically within the scope of film text and don't allow any interference pattern, otherwise it will cause identification errors. Some high magic eye sensitivity, of course, the black and white balance can be precision adjustment, for some of the light interference signal can be remove by adjusting, but close to the cursor or a darker color pattern is unable to remove the interference signal.

光标之间的间距是用来定长的，因而其实际间距与设计值的误差不能太大，一般只允许有0.5mm误差。对于许多自动包装设备来说，负偏差要比正偏差的跟踪效果要好，因而建议设计为负偏差。镀铝或纯铝具有较强的镜面反射，会影响电眼的识别，建议其复合膜光标印上白色底。对于透明复合膜，由于受与它相接触的物品的颜色影响，也建议光标印上白色底，从而减少干扰.
The spacing between the cursor is used for long, so the error between the actual distance and the design value can't be too big, generally only allowed error is 0.5 mm. For many automatic packaging equipment, negative deviation than positive deviation tracking effect is better, that is designed for negative deviation. Aluminum plating or pure aluminium has strong specular reflection, can affect the magic eye recognition, suggest the composite film cursor printed on white. For transparent composite film, because is affected by the color of the items in contact with it, and also suggests the cursor printed on white, thereby reducing interference

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