How Is CNC Milling Located In PCB Machining

The positioning is simple and reliable, and the plate can be loaded and unloaded quickly and chip can be removed at the same time.There are a variety of positioning methods, such as some number milling machine design reciprocating table, when a table in the processing, another table installed, unloading plate.There are two sets of milling positioning pad method, when a milling positioning pad in CNC milling work table processing, another milling positioning pad in the platform jacket, unloading plate.The exchange takes only a few seconds.The CNC milling table in PCB proofing is itself a positioning plate, it is a pin positioning, screw fixed aluminum alloy plate.

Under the spindle of each CNC milling machine there is a hole and slot type positioning system on the table surface.The milling pad is actually an intermediate positioning fixture, sometimes called "soft positioning".It is required to be able to locate reliably and unload quickly, reduce auxiliary time and improve production efficiency.Before milling the shape, a groove with the same dimension as the printed board is pre-milling the backing plate.In general, the size of the groove width is the actual milling cutter diameter plus 0.5 mm.The depth of the groove is 2.5 mm.During machining, it is a path of the milling cutter's motion path.As a result of the vacuum cleaner suction, in the groove to produce a stream of air, eliminate the chip, so that be processed more smooth, prevent chip blocking milling cutter chip slot, reduce the front.When machining, the milling cutter should be inserted into the groove 1.5 ~ 2 mm.This prevents the end wear due to the milling cutter continuous cutting plate, diameter reduction and due to the milling cutter manufacturing allowed end diameter reduction resulting in printed board processing size deviation.