Mitsubishi Electric EA8PV Advance

$180,000 - $260,000 Updated 2026-03-16

Key Specifications

Accuracy

±0.002 mm (±0.00008 in)

x axis travel

400 mm (15.7 in)

y axis travel

300 mm (11.8 in)

z axis travel

300 mm (11.8 in)

work table

600 x 400 mm (23.6 x 15.7 in)

max workpiece weight

500 kg (1,102 lb)

Overview

The Mitsubishi Electric EA8PV Advance is a precision sinker EDM machine from one of the three manufacturers — alongside Sodick and Makino — that define the premium sinker EDM market. The EA8PV Advance sits in the mid-size sinker EDM class, offering 400 x 300 x 300 mm (15.7 x 11.8 x 11.8 in) X/Y/Z travels, and targeting mold and die shops producing injection mold cavities, stamping dies, and precision tooling where surface finish quality and electrode consumption efficiency are the primary decision criteria.

Mitsubishi Electric's M800 DSS (Digital Signal System) pulse generator is the heart of the EA8PV Advance's performance. The DSS pulse generator controls each discharge at the microsecond level, independently managing ignition delay, discharge duration, and pause time to maximize material removal while minimizing re-cast layer formation and electrode wear. The result is superior surface quality — Ra down to 0.05 µm (2 µin) in fine-finishing mode — and lower electrode wear ratios versus older analog pulse systems.

The SV (Servo Vector) drive system maintains the gap between electrode and workpiece with high-speed feedback control, adapting to changing workpiece geometry and electrode wear in real time. The machine's C-axis rotary spindle head (optional) enables helical EDM cycles, gear electrode burning, and complex-geometry electrode paths. The ADVANCE-Office control software provides CAM-style operation planning for complex multi-electrode programs.

At $180,000-$260,000 new, the EA8PV Advance is competitively priced against the Sodick AG40L and GF Machining Solutions Form P 350 in the mid-size sinker EDM class. Mitsubishi Electric's global service network and the widespread familiarity of their CNC technology in machine shops make the EA8PV Advance particularly accessible for shops already using Mitsubishi CNC controls on their machining centers.

Full Specifications

Parameter	Value
X Axis Travel	400 mm (15.7 in)
Y Axis Travel	300 mm (11.8 in)
Z Axis Travel	300 mm (11.8 in)
Work Table	600 x 400 mm (23.6 x 15.7 in)
Max Workpiece Weight	500 kg (1,102 lb)
Max Electrode Weight	50 kg (110 lb)
Best Surface Finish	Ra 0.05 µm (2 µin)
Drive System	Ball screws with servo drives
Positioning Accuracy	±0.002 mm (±0.00008 in)
Pulse Generator	M800 DSS (Digital Signal System)
Max Machining Current	50A
CNC Control	Mitsubishi CNC (ADVANCE-Office)
Machine Weight	~3,200 kg (7,055 lb)

Strengths & Limitations

Strengths

M800 DSS pulse generator controls discharge at microsecond level for superior surface finish down to Ra 0.05 µm
Mitsubishi Electric's proven CNC platform provides a familiar programming environment for shops using Mitsubishi machining center controls
SV drive system maintains electrode gap with high-speed feedback, adapting to varying workpiece geometry automatically
Competitive pricing at $180K-$260K versus Sodick and Makino sinker EDMs with equivalent capability
Mitsubishi Electric's global service network provides better support coverage than Sodick or GF in most regions
ADVANCE-Office CAM-style control software simplifies multi-electrode program planning for complex mold work

Limitations

Ball screw drives versus Sodick's linear motors mean the EA8PV Advance has marginally lower positioning accuracy at ±0.002 mm versus Sodick's ±0.001 mm
500 kg workpiece weight limit is adequate for mid-size mold work but constrains large mold base applications
Dielectric system and generator parameter optimization requires operator experience to achieve the best results consistently
No standard integrated C-axis — rotary head is optional at additional cost
Positioning at ±0.002 mm is excellent but trails Sodick's linear motor accuracy for shops with sub-micron EDM requirements

Best For

Mold shops producing injection mold cavities and inserts where Ra 0.05 µm surface finish reduces post-EDM polishing time Stamping and progressive die shops burning complex punch and die geometries in D2, M2, and carbide Precision tooling manufacturers machining small complex features in hardened steel that cannot be cut conventionally Shops already standardized on Mitsubishi CNC controls seeking minimal operator retraining on the sinker EDM Mid-size mold shops requiring a reliable, well-supported sinker EDM at competitive pricing below Makino EDAF3

Frequently Asked Questions

01 What surface finish does the EA8PV Advance achieve?

The EA8PV Advance achieves Ra 0.05 µm (2 µin) in fine-finishing mode using the M800 DSS pulse generator's optimized discharge parameters. This is a near-mirror finish achievable by the EDM process without hand polishing, which significantly reduces post-EDM finishing labor in mold production.

02 How does the EA8PV Advance compare to the Sodick AG40L?

The Sodick AG40L uses linear motors for ±0.001 mm positioning accuracy; the Mitsubishi EA8PV Advance uses ball screws for ±0.002 mm accuracy. For most mold and die applications, the 0.001 mm accuracy difference is not meaningful. The Mitsubishi offers broader service coverage and Mitsubishi CNC familiarity. The Sodick offers higher positioning accuracy and is preferred where sub-micron EDM accuracy is required.

03 What electrode materials work on the EA8PV Advance?

The EA8PV Advance works with standard EDM electrode materials including graphite (machined), copper, copper-tungsten, and silver-tungsten. Graphite is the most common choice for mold cavities due to its machinability and low wear characteristics. Copper gives better surface finish in fine-finish modes. The M800 DSS pulse generator has optimized condition sets for each electrode material.

04 Does the EA8PV Advance support automatic electrode changing?

An optional automatic electrode changer (AEC) is available for the EA8PV Advance for lights-out unattended burning of multi-electrode programs. The AEC stores multiple electrodes and switches between them automatically per the program's electrode sequence. This is particularly useful for long mold cavity programs that require roughing, semi-finishing, and finishing electrodes.