PCB Technical - Jigsaw specifications and standards of circuit board factories​

Jigsaw specifications and standards of circuit board factories

1. Circuit board manufacturer, the width of the circuit board jigsaw ≤260mm (SIEMENS line) or ≤300mm (FUJI line); if automatic dispensing is required, the PCB jigsaw width & TImes; length ≤ 125mm & TImes; 180mm;

2. The center distance between the small boards of the circuit board is controlled between 75mm and 145mm;

3. The outer frame (clamping edge) of the PCB jigsaw should adopt a closed loop design to ensure that the PCB jigsaw will not be deformed after being fixed on the fixture;

4. When setting the reference positioning point, usually leave a non-resistance area 1.5mm larger than it around the positioning point;

5. The shape of the PCB circuit board is as close to the square as possible. It is recommended to use 2&TImes;2, 3&TImes;3, and circuit board; but do not put together a Yin-Yang board;

6. Each small board in the PCB circuit board jigsaw must have at least three positioning holes, 3≤aperture≤6mm, and no wiring or patching within 1mm of the edge positioning hole;

7. Four positioning holes are made at the four corners of the outer frame of the circuit board jigsaw, with a diameter of 4mm±0.01mm; the strength of the holes should be moderate to ensure that they will not break during the upper and lower boards; the precision of the hole diameter and position should be high, and the hole wall should be smooth No burrs

8. The reference symbol used for the positioning of the entire PCB circuit board and the positioning of fine-pitch devices. In principle, the QFP with a spacing of less than 0.65mm should be set at its diagonal position; the positioning reference symbol used for the imposition PCB daughter board should be For use, it is arranged at the opposite corner of the positioning element;

9. There should be no large components or protruding components near the connection point between the outer frame of the circuit board and the internal small board, between the small board and the small board, and the edge of the components and the PCB circuit board should be more than 0.5mm Space to ensure the normal operation of the cutting tool;

10. Large components should have positioning posts or positioning holes, such as I/O interface, microphone, battery interface, micro switch, earphone interface, motor, etc.

The company is a manufacturer engaged in mass production of PCB circuit boards.