Fanuc Robocut Alpha C400iA
Key Specifications
X / Y Travel
Z Travel
Max Workpiece Weight
Wire Diameter Range
Max Cutting Speed
Surface Finish Ra
Overview
The Fanuc Robocut Alpha C400iA is a mid-range wire EDM that combines the precision and reliability of Fanuc's Alpha series with a practical 400 x 300 mm cutting envelope suited for tool and die shops, precision parts manufacturers, and mold makers working on medium-to-large workpieces. The machine balances cutting speed, surface quality, and ease of use in a compact, thermally stable structure.
The Alpha C400iA uses Fanuc's refined pulse generator and AI-driven adaptive feed control, which continuously evaluates the spark gap and adjusts feed rate to prevent wire breakage and optimize material removal rate. This technology is especially effective when cutting materials like carbide, titanium, and hardened steels that are prone to unstable discharge conditions.
Fanuc's submerged cutting capability keeps the workpiece fully immersed throughout the process, improving thermal stability, flushing efficiency, and surface finish consistency. The optional automatic wire threading (AWT) unit enables reliable re-threading down to 0.1 mm wire in submerged mode, supporting long unattended production runs.
With a maximum workpiece weight of 800 kg and Z-axis travel of 220 mm, the Alpha C400iA accommodates a wide variety of tooling and component sizes. Its dedicated Robocut CNC interface provides a streamlined operator experience, and the machine integrates smoothly into Fanuc-heavy automation environments already using Robodrill or Roboshot equipment.
Full Specifications
| Parameter | Value |
|---|---|
| X / Y Travel | 400 x 300 mm |
| Z Travel | 220 mm |
| Max Workpiece Weight | 800 kg |
| Wire Diameter Range | 0.1 – 0.3 mm |
| Max Cutting Speed | 400 mm²/min |
| Surface Finish Ra | 0.25 µm (finishing mode) |
| Max Taper Angle | ±15° / 100 mm height |
| Control System | Fanuc CNC (Robocut dedicated) |
| Machine Weight | 3,800 kg |
Specifications sourced from emastercam.com — verified 2026-03-28
Strengths & Limitations
Strengths
- AI adaptive feed control significantly reduces wire breakage on difficult materials
- Submerged cutting with AWT enables reliable lights-out production
- Seamless integration with Fanuc automation ecosystems (Robodrill, Roboshot)
- Compact footprint relative to its 800 kg workpiece capacity
Limitations
- Mid-range price may be challenging for smaller job shops
- Slightly lower max cutting speed than the larger C600iA model
- Consumable and maintenance costs require factoring into total cost of ownership
Best For
Frequently Asked Questions
01
The C400iA has a 400 x 300 mm X/Y travel and 800 kg workpiece capacity, making it better suited for medium-sized workpieces. The C600iA offers 600 x 400 mm travel and 1,000 kg capacity for larger dies and molds. Both share similar control and pulse technology.
02
Yes. The C400iA supports taper angles up to ±15° over 100 mm workpiece height using the upper and lower wire guide axes, enabling complex die-clearance angles and 4-axis contoured surfaces.
03
In roughing mode the machine maximizes material removal rate; in fine finishing mode it achieves surface roughness of approximately Ra 0.25 µm, which is sufficient for many mold and die applications without hand polishing.
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Links to community discussions. Summaries are editorial — visit the original thread for full context.
