PCB Tech - Commonly used PCB jigsaw specifications

Commonly used PCB jigsaw specifications

PCB factory editor: 1. The center distance between the small boards is controlled between 75 mm and 145 mm

2. There should be no large devices or protruding devices near the connection points between the outer frame of the panel and the inner small board, and the small board and the small board, and there should be more than 0.5mm space between the components and the edge of the PCB board. To ensure the normal operation of the cutting tool

3. PCB panel width ≤260mm (SIEMENS line) or ≤300mm (FUJI line); if automatic dispensing is required, PCB panel width*length ≤125 mm*180 mm

4. The shape of the PCB jigsaw should be as close to the square as possible, and 2*2, 3*3, …… jigsaw is recommended; but don’t make it into a yin and yang board.

5. The reference symbols used for the positioning of the entire PCB and the positioning of fine-pitch devices. In principle, the QFP with a pitch less than 0.65mm should be set in its diagonal position; the positioning reference symbols used for the imposition PCB daughter board should be paired Used, arranged at the opposite corner of the positioning element

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

7. Large components should have positioning posts or positioning holes, such as I/O interfaces, microphones, battery interfaces, micro switches, headphone jacks, motors, etc.

8. The outer frame (clamping side) 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

9. Four positioning holes are made at the four corners of the frame of the 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 and free of burrs.

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

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