In our system we use the pneumatic quick-clamping frame LPKF ZelFlex Z4P Slim. Stencils for this frame require special perforation on the edge. This is used to fix the stencil in the frame and stretch it by using compressed air.

• External frame dimensions 584x584x25mm
   
• Internal frame dimensions 504x504mm
   
• External stencil dimensions 549x549mm
   
• Maximum working area 484x484mm
   
• perforation on the edge of the stencil

• Stencil thickness depends on the components to be assembled
   

What the positioning of the soldering structures should look like is illustrated in the following PDF.