Shaking off perforated metal excess - GIF

[Frank S]

Agreed. A fly or roll punch is a distinct possibility, just can't quite picture why they're ejecting as a second operation of punch work.
These COULD be plasma or water jet, and keep the pieces out of the catch basin.

We know that a punch is the only thing that will leave a center mark sans a second operation. My 35 station CNC punch I had in the Middle East had 4 orbital stations. for directional punching. That thing could be programed to make just about any shape or hole pattern even louvers and the knockouts for electrical enclosures or Switch gear panels. Once cut folded spotwelded and painted the only way you could tell one of our products from Square D or others was the custom size to suit the customer's requirements. We could one off produce them economically as well, not cheap but less costly than trying to talk a big name supplier into making custom sized enclosures