Fanuc Robocut Alpha-C400iB Wire EDM

The Fanuc Robocut Alpha-C400iB is a wire EDM, and the figures FANUC lists for it describe wire handling and unattended running rather than the work envelope: a minimum wire diameter of 0.05 mm, automatic wire threading in 10 seconds and up to 140 hours of unmanned machining. No axis travels appear in the table, so the envelope has to be settled from the quotation before anything else.

Surface finish is listed as Ra 0.1 micron with 4 trim cuts. That is the result of a rough cut followed by four skims, so it shows what the machine can reach on a part that justifies the cycle time, not what a single pass leaves. Taper cutting goes up to ±30° over 100 mm height. Because the figure is tied to that height, ask what angle is available on thicker work.

The wire system is where the table is most specific. Wire as fine as 0.05 mm suits narrow slots and small inside corner radii, and tension is held to +/- 15 g, which matters most with wire that thin. After a break, automatic rethreading works in sections up to 150 mm thick. Below that thickness a wire break need not end an unattended shift; above it, plan for someone to be present.

Two figures frame lights-out work. The standard wire capacity lasts 60 hours, while the longest unmanned run is given as 140 hours, more than twice as long, so the longer figure depends on more wire than the standard supply carries. Ask which spool arrangement it assumes. The control is a FANUC CNC with up to 7 simultaneously controlled axes. Maximum workpiece weight is listed as 60 kg, a low figure that should be confirmed for the machine on the quote.