It is performed in a more simplified form, since most of the work is done in one installation, a simple binding is sufficient. The device simplifies the binding of the workpiece on the machine. It is about such a tool that we are talking about. Works on all coordinates x, y, z. The same system exists for machines, at the beginning of this video the work is shown: determining the center of a round blank. For example, set the spindle (axis of rotation, tip of the cutter) by eye in the center of the workpiece, and press the buttons in the machine control program that this position will be the starting point of all coordinates. In addition to the coordinates, there are many other codes in the program, they are also G codes, such as spindle speed, turning on the coolant, pauses, etc. Ideally, it would be nice to have a diamond probe 🙂 And it is necessary for the machine to report the offset very accurately so that there are no traces of the transition on the finished product. CNC machines have a 3D coordinate system, x y z. The described topic applies not only to the gurus of CNC machines, but also to people who are not associated with this terrible word. And in such a bundle, the process is fast and automated. With the development of computer technology, writing programs manually becomes a thing of the past, it is enough to indicate the required trajectory in the program, set the settings: revolutions spindle, feed, and the computer will generate a program that the CNC machine can understand. The measurement system RENISHAW is very common on the world market, probably many have seen it often on TV when a factory is shown somewhere and there the coordinate system determines the dimensions of the resulting large part, determines whether it fits into the tolerance or not.
And the main task is to make the material understandable to everyone. The probe itself is self-contained on batteries, it transmits the touch of the ruby tip and the emitter to the receiver (like a TV remote control), which stands nearby. Such a system is expensive and beyond the reach of many craftsmen, and sometimes such accuracy is not needed, you can do without it using alternative methods. But when you need to very accurately indicate the edge of the workpiece, or accurately determine the edges – to calculate the center, you will need additional tools. What is this obscure piece of iron and what is it for? And why is it so expensive.
Small digression. And the receiver is connected to the machine. On a CNC machine, in addition to installing tools, milling cutters, drills, engravers, etc. into the spindle, and screwing the workpiece to the table, it is necessary to indicate to the machine where the workpiece is located in its working area. It can be small, but the table is large. How it works and what exactly it binds, read on… The ruby tip is made with very high accuracy and after touching, the radius is automatically subtracted or added from the obtained coordinates to obtain the coordinates of the center of rotation of the spindle. And the ruby is used because it is more resistant to frequent contact with metal, and maintaining its size affects accuracy. The material requires an introductory part, I will describe it in the simplest possible way, I ask you not to criticize too much, but to treat it with understanding. Maybe someone in the future will be connected with this topic, and it may be useful to him. Returning to the main topic, there was a post recently about an engraving and milling machine, where the operation of indicating to the machine where the https://jiji.ng/mushin/20-sofas/leather workpiece is located is present, but not shown. And the main work of the machine is to read the "CNC program" in which it is written, to go along the coordinate x with such and such a speed, then (on the next line) go along the coordinate y and x at that speed, etc. But it may be the other way around, the workpiece is larger than the work area and the processing will have to be done with a rearrangement (if possible) and the launch of the next program. Of course, this operating point must also be initially specified in the program. The coordinates are given in mm, and the speed, aka feed, is expressed in mm/ min.