Requirements for mounting machine on PCB
Process edge: PCB edge that will be clamped when placed on the conveyor rail of the machine. The width of the plywood is 5mm (3mm on the front);
The clamping edge is required to be parallel and straight, and no component can be placed 5 mm (3 mm on the front) close to the plate edge (if not, please add the process edge);
The nonclamping edge shall not have any element protruding out of the plate;
The length of the clamping edge must be greater than 80mm, and it should be designed on the long side as far as possible, at least meeting the requirement that the clamping edge: the other side>1:1.5;
The process edge shall be added in the direction of fewer Vcuts to reduce the deformation of the plate.
The following figure does not consider the clamping edge, and the edge components may be damaged by the machine.
The process edge is added in the direction of less Vcuts to reduce deformation and avoid plate breakage
PCB overall dimensions and splicing
The size of PCB is 60 * 80mm-250 * 330mm, and the shape of PCB is rectangular (square). If not, please splice the board and add process edges.
The thickness of PCB is 0.8-4mm, and the maximum width thickness ratio is 150:1 (when the length of PCB is 150mm, the thickness cannot be less than 1mm);
Optimum panel size and quantity
PCB thickness is less than 1mm and there are precision components (0402, 0.5mm, and below). It is recommended that the size of the splice board be 100 * 150mm;
The thickness of PCB is less than 1mm, with precision components (0402, 0.5mm and below), and the number of splice plates does not exceed 10 * 15;
The recommended size of a conventional plate is 100 * 150-180 * 250mm.
Outline example drawing
Positioning point: also called datum point, the placement machine determines the position through the positioning point.
1mm diameter round pad+3.5mm diameter green oil windowing anti-interference+3mm diameter and 0.5mm width ring
In case of insufficient space: the Fid Mark is drawn as a 1mm round pad+2mm above resistance welding window
The outermost process ring can improve the influence of the PCB production process on the Fid Mark
When there is a splice board, the Mark point should be drawn into the board as far as possible
The design suggested by Fid Mark: mark point+green oil window anti-interference area+process ring.
Unavailable design: The green oil window is not enlarged, and the Mark point is partially covered by the solder mask, causing the machine to be pasted away from the correct position.
The pins are not all placed on the bonding pad, which can easily be poorly welded.