How to determine the tool point of the CNC machining center? What is the relationship between the workpiece coordinate system and the programmed coordinate system?

1. The tool point can be set on the part to be machined, but note that the tool point must be the reference position or the finished part. Sometimes the tool point is destroyed after the first process, which will lead to the second path. There is no way to find the tool and the subsequent tool points. Therefore, when pairing the tool in the first process, pay attention to set a relative tool setting position in a relatively fixed size relationship with the positioning reference, so that you can find the relative positional relationship between them. Return to the original point. This relative pair of tool positions is usually located on the machine table or fixture. The selection principles are as follows:

1) It is easy to find.

2) Easy to program.

3) The tool setting error is small.

4) It is convenient and reliable to check during processing.

2. The origin position of the workpiece coordinate system is set by the operator. After the workpiece is clamped, it is determined by the tool setting. It reflects the positional relationship between the workpiece and the machine zero. Once the workpiece coordinate system is fixed, it is generally not changed. Both the workpiece coordinate system and the programmed coordinate system must be uniform, that is, the workpiece coordinate system and the programmed coordinate system are identical during machining.