How to determine the origin of workpiece coordinate system?

Determining the origin of the workpiece coordinate system: firstly, it can be regarded as the moving process of the part model, that is, the position of the workpiece coordinate system is moved to the origin of the system coordinate system by using commands such as moving and rotating, and the direction of the workpiece coordinate system is kept consistent with the actual coordinate system of the machine tool. Of course, it is necessary to determine the machining origin of parts, and also consider the influence of different tool sizes on machining. These all need to be solved by aligning the knives.

The classification of cutting tools is introduced in detail:

1, roughly aligned?

General tool alignment refers to manual tool alignment using relative position detection on machine tools. Below, take Z-direction tool setting as an example to illustrate the tool setting method. After the tool is installed, first move the tool to manually cut the right end face of the workpiece, then retract the tool along the X direction, and input the distance n from the right end face to the machining origin into the numerical control system, that is, complete the tool alignment process in the Z direction. ?

2. Use the off-machine tool setting instrument for tool setting?

The essence of off-machine tool alignment is to measure the distance between the imaginary tool tip point and the tool table benchmark in X and Z directions. Using the off-machine tool alignment instrument can calibrate the tool outside the machine tool in advance, so that after the machine tool is installed, you only need to input the tool alignment length into the corresponding tool compensation number to use it. ?

3. Automatic tool alignment?

Automatic tool alignment is realized by tool tip detection system. The tip of the tool approaches the contact sensor at a set speed. When the tool tip touches the sensor and sends a signal, the numerical control system immediately records the coordinate values at that moment and automatically corrects the tool compensation value.