A magnet application from our customer: positioning for stencil printers for circuit board assembly.
Positioning for stencil printers for circuit board assembly
A steel sheet with recesses is positioned over a circuit board. Apply solder paste with a squeegee. After removing the stencil, there are small „islands“ of solder paste in the places where soldering is to take place. The components are placed in this paste. After assembly, the circuit board is placed in a special oven. The solder paste melts and solders the components to the circuit board.
The original fixing tool for the printer is quite large and inflexible. Small pot magnets are therefore ideal for circuit boards with an outer contour and smaller prototypes.
The pot magnets NFGB-06-Z and NFGB-10-Z have a standard bolt with a 3 mm thread and M3 x 6 mm grub screws. NFGB-16-Z is probably even better suited for this.
How neodymium pot magnets with steel pot work:
A neodymium magnet is embedded in a steel pot. This metal housing protects the neodymium magnet from damage and increases the adhesive force. In order to achieve optimal adhesive force, the pot magnet must rest directly on the metal surface. A thin iron sheet or a paint finish can reduce the adhesive force very quickly. The adhesive force only works on the open side of the magnet, as the steel pot shields the magnetic effect.