The edge finder is manually selected from the tool magazine. It should be noted that the speed of the spindle is not higher than 500 revolutions / minute. You switch to the electronic handwheel and select the axis you want to move. Then you position the edge finder in front of the workpiece in the axis in which the zero point is to be taken.
Now proceed carefully to the workpiece until the edge finder first runs and then deflects. The reference point is then set for the axis. This operation is done for the X and Y axes with the edge finder.
A tool is called for the reference point in the Z-axis, e.g. the centre drill, and the tool is on the upper side of the workpiece. This can be done with a paper that is easily moved. The Z-axis is moved in the direction of the workpiece until the paper is clamped. Now the reference point is also set in Z.
The values of the reference points are now inserted into the zero point memory. It is important that the zero point table is the same as the one, which is called by the program.
There are a lot of variations of mechanical edge finders. In addition, there is also a wide range of electronic edge finders which have a high measuring accuracy.