Precautions for installation of electronic ruler o

Precautions for the installation of electronic ruler of EDM perforating machine

generally, the grating ruler is installed on the workbench of high-speed EDM small hole machining machine tool, moves with the machine, and the reading head is fixed on the machine body, so that the reading head is installed below the main ruler as far as possible. The selection of its installation method must pay attention to the splashing direction of the machining fluid of the high-speed EDM small hole machining machine tool. In addition, generally speaking, the reading head should be installed on the static parts of the relatively high-speed EDM small hole machining machine tool as far as possible. At this time, the output wire does not move and is easy to fix, while the ruler body should be installed on the parts moving relative to the machine tool

1. When the installation base surface of the grating ruler of the EDM perforating machine is installed on the bed of the EDM perforating machine tool, the optical ruler cannot be directly installed on the rough bed. The optical ruler and the reading head are respectively installed on the two parts of the relative movement of the machine tool. Use a dial indicator to check the parallelism between the main ruler mounting surface of the machine tool workbench and the direction of guide rail movement. The dial indicator shall be fixed on the bed and the workbench shall be moved, and the parallelism shall be within 0.1mm/1000mm. If this requirement cannot be met, a grating ruler base needs to be designed and processed. In addition, the reading head shall be installed on the base of the reading head. The total error between the base of the reading head and the base of the ruler body shall not be greater than ± 0.2m. At the same time, during installation, 1 pay attention to the installation of the locking device M. During installation, adjust the position of the reading head so that the parallelism between the reading head and the grating ruler body is about 0.1mm, and the distance between the reading head and the grating ruler body is about 1-1.5mm

2. Installation of grating ruler main ruler put the grating ruler on the mounting surface of the workbench of the high-speed EDM small hole machining machine tool with M4 screws, but do not tighten it. Fix the dial indicator on the bed and directly foam it without heating, and move the workbench. Use a dial indicator to measure the parallelism between the plane of the main ruler and the moving direction of the machine tool guide rail, adjust the position of M4 screw of the main ruler, and when the parallelism of the main ruler is within 0.1mm/1000mm, tighten 2 screws completely

3. Installation of grating ruler reading head when installing the reading head, first ensure that the base surface of the reading head meets the installation requirements, and then install the reading head. Its installation method is similar to that of the main ruler in terms of industrial structure. Finally, adjust the reading head to ensure that the parallelism between the reading head and the grating main ruler is within 0.1mm, and the gap between the reading head and the main ruler is controlled within 1-1.5mm

4. After the optical ruler is installed, connect the digital display meter, move the workbench, and observe whether the counting of the digital display meter is normal

select a reference position on the machine tool and move the working point back and forth to the selected position. The readings of the digital display meter should be the same (or return to zero). In addition, a dial indicator can also be used to set the dial indicator and the digital display to zero at the same time

5. The grating ruler is equipped with a shield. The design of the shield is determined according to the enlargement of the external section of the grating sensor, leaving a certain space size. The shield is usually sealed with rubber, so that it has a certain water and oil resistance