The integrity of the phenolic table is protected by a spoilboard made of MDF, typically with a 3/4-inch depth. CNC routers can have 2 to 8+ zones to help optimize and isolate vacuum.
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Instead of creating suction where it is wasted, the machine concentrates the full power of the vacuum pump exactly where it is needed to maximize hold-down effectiveness. So if you have a 5-foot by 10-foot table, but you are working with a 4-foot by 8-foot piece, the controller keeps the vacuum within that 4-foot by 8-foot section of the table. By accessing holes in the phenolic surface and the grooves between them, the vacuum pump under the machine can spread vacuum suction evenly around the table or through specified zones. A phenolic table’s matrix is essentially a rubber gasket that can be used to isolate the zones of the table you need to use.
Optimizing vacuum starts with understanding the advantages of having a router with a phenolic table. Optimizing machine performance depends on knowing what it takes for vacuum-pumped air to permeate your machine’s table and the MDF spoilboard that protects it. Dependable hold-down capability is crucial to all jobs, but especially those that involve cutting smaller parts. Manufacturers that work with nesting CNC routers depend on optimal vacuum to hold down their parts firmly and consistently.
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