ROBOFIL 440cc

Charmilles’ ROBOFIL 240cc/440cc uses the CC generator to dramatically improve machining speed while preserving the surface integrity of the machined material.

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Charmilles’ ROBOFIL 240cc/440cc uses the CC generator to dramatically improve machining speed while preserving the surface integrity of the machined material. With the machine, Charmilles has brought the technology of high-speed EDM to the wire EDM market. The cutting speed in tool steel can reach a high of 42 square inches an hour, once again raising the top speed barrier, which had previously been about 37 square inches an hour. The CC generator is a digital generator based on high-tech components. From roughing to finishing, the CC generator is ‘zero voltage’ to protect parts against electrolytic effects. As a result, users of the 240cc/440cc receive the fastest cutting speed on the market plus anti-electrolysis in rough and skim cutting. The cutting speed increases apply even when a tall part is being cut, up to 15.75” on the 440cc. The key to the 240cc/440cc’s speed is Charmilles’ new spark design. The maximum ignition voltage has been increased by 25%. The maximum amplitude has been tripled from 400 amp. to 1,200 amp. The high quality of the surface finish is another advantage of these revolutionary machines. The machine achieves finer surface finishes with fewer skim cuts. An important application segment of the CC generator is the medical industry, which uses a lot of titanium on titanium alloys that frequently are placed into the human body as artificial parts. The CC generator prevents oxidation on the titanium and maintains surface integrity free of brass and zinc materials originating during the cutting process from the wire electrode. In carbide applications the machine minimizes cobalt depletion, the effect of which is to hold tungsten together. This insures a higher bearing capacity of punches or dies. The new generator shines as well in cutting PCD (poly crystalline diamond) form tools. The surface finish and edge sharpness is at least equal and, in most cases, better than grinding. The 240cc/440cc also comes equipped with ThermoCut and collision protection. ThermoCut is a unique high-speed and maintenance-free wire threading system that stretches the wire and cuts it under the effect of heat, regardless of wire diameter and material. The collision protection provides effective protection on all five axes of the machine during manual or unattended operation. It boosts performance and cuts down on maintenance costs in the event of programming or manual positioning errors. Charmilles’ Taper-Expert option is also available to be added on the 240cc/440cc. This feature makes it possible to cut very high-precision angles, up to 30°. An accurate taper is especially important for moldmakers.