Mitsubishi Electric EA28V Advance
Key Specifications
Accuracy
x axis travel
y axis travel
z axis travel
work tank interior
max workpiece weight
Overview
The Mitsubishi Electric EA28V Advance is the large-format flagship of Mitsubishi's sinker EDM lineup, offering generous 800 x 600 x 450 mm (31.5 x 23.6 x 17.7 in) X/Y/Z travels for large mold base and die block work that smaller sinker EDMs cannot accommodate. The EA28V Advance is deployed in large injection mold shops, heavy stamping die facilities, and aerospace tooling operations where single-setup EDM burning of large complex features is required.
The machine's M800 DSS pulse generator — the same technology in Mitsubishi's smaller sinker EDMs — scales to the EA28V's 100A maximum machining current, enabling high material removal rates on large roughing operations while retaining the fine-finish capability (Ra 0.05 µm) required for final surface quality on mold cavities. The SV servo system maintains electrode gap stability even at high currents and large electrode areas, where gap control becomes more challenging as EDM flushing becomes less effective at depth.
Workpiece capacity reaches 3,000 kg (6,614 lb), enabling large mold base and die block work on a machine with proper structural support. The work tank interior measures 1,400 x 900 mm (55.1 x 35.4 in), providing ample space for large workpiece fixturing. Maximum electrode weight is 200 kg (441 lb), allowing large graphite block electrodes common in large cavity EDM work.
At $350,000-$500,000 new, the EA28V Advance is priced in the large sinker EDM segment alongside the Sodick AG100L and Makino EDAF5. Mitsubishi Electric's service coverage and CNC platform familiarity make it particularly attractive for large mold shops and die facilities that need comprehensive service support for a mission-critical machine. The EA28V Advance competes effectively with Japanese alternatives at equivalent specifications and pricing.
Full Specifications
| Parameter | Value |
|---|---|
| X Axis Travel | 800 mm (31.5 in) |
| Y Axis Travel | 600 mm (23.6 in) |
| Z Axis Travel | 450 mm (17.7 in) |
| Work Tank Interior | 1,400 x 900 mm (55.1 x 35.4 in) |
| Max Workpiece Weight | 3,000 kg (6,614 lb) |
| Max Electrode Weight | 200 kg (441 lb) |
| Best Surface Finish | Ra 0.05 µm (2 µin) |
| Drive System | Ball screws with precision servo drives |
| Positioning Accuracy | ±0.002 mm (±0.00008 in) |
| Pulse Generator | M800 DSS (Digital Signal System) |
| Max Machining Current | 100A |
| CNC Control | Mitsubishi CNC (ADVANCE-Office) |
| Machine Weight | ~9,500 kg (20,944 lb) |
Specifications sourced from mitsubishielectric-edm.eu — verified 2026-03-28
Strengths & Limitations
Strengths
- 800 x 600 x 450 mm travels handle large mold bases and die blocks that smaller sinker EDMs cannot accommodate in a single setup
- 3,000 kg workpiece capacity supports heavy mold base and die block work without custom lifting fixtures
- 100A maximum current enables high material removal rates on large roughing operations, reducing total burning time
- M800 DSS pulse generator achieves Ra 0.05 µm in fine-finish mode across the full machine scale
- Mitsubishi Electric global service network provides comprehensive support coverage for a machine in this size and price class
- 200 kg electrode capacity supports large graphite block electrodes common in large cavity and die work
Limitations
- 9,500 kg machine weight requires reinforced concrete foundation and careful installation planning
- Ball screw drives at this scale have more inherent thermal expansion than linear motors — thermal compensation is important
- Large EDM work tank requires significant dielectric fluid volume and a robust filtration system
- $350K-$500K investment requires dedicated large-cavity mold or die work to justify — not appropriate for shops that occasionally see large work
- Flushing large cavity volumes effectively at depth requires careful fixture and flushing circuit design
Best For
Frequently Asked Questions
01
The EA28V Advance accommodates workpieces up to 3,000 kg (6,614 lb) within the 1,400 x 900 mm work tank interior. The 800 x 600 x 450 mm axis travels define the accessible machining envelope. Large mold bases, die sets, and tooling blocks that exceed the capacity of mid-size sinker EDMs are the EA28V's target workpieces.
02
Setup time on the EA28V Advance includes workpiece fixturing, electrode mounting, program loading, and datum setting. For a typical mid-size mold cavity program with 3-5 electrodes, setup takes 2-4 hours. Large multi-electrode programs with 10+ electrodes may take a full shift to set up properly. Using the optional automatic electrode changer (AEC) reduces program interruptions during execution.
03
An optional C-axis rotary spindle head is available for the EA28V Advance, enabling helical EDM cycles and rotational electrode paths for gears, rotors, and other rotationally symmetric EDM features. The C-axis option adds significant cost and is appropriate when the workpiece mix includes features that benefit from rotary EDM burning.
04
Both are large-format sinker EDMs with similar maximum workpiece capacity. The Sodick AG100L uses linear motors for ±0.001 mm positioning versus the Mitsubishi's ±0.002 mm with ball screws. For large mold work where electrode positioning tolerances are typically ±0.01 mm or looser, both machines perform comparably. The Mitsubishi offers broader service coverage; the Sodick offers marginally higher positioning precision.
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