Specifications

0.2mm/div 0.2mm/div
Machining Samples
Fine High-accuracy Machining
Highly accurate machining shapes
Electrode wear suppression circuit: α-SC circuit (standard for all models)
Ultrafine surface
Example of connector part machining
Narrow pitch positioning on the incorporated connector is essential
for attaining high densities on electrical and electronic parts.
The MA2000 and EA8PV are capable of attaining optimally sharp
corners and fine finishing on high-accuracy connectors for flexible
printed circuit (FPC) board.
• Electrode wear is suppressed when machining a steel workpiece with a
small copper or copper tungsten electrode
• This circuit is effective for multiple set-up machining and shapes
requiring edges
• Compatible with small undersize amounts of 0.03 to 0.07mm per side
(0.0012 to 0.0028")
Ultrafine matte finish circuit: NP2 circuit (standard for EA8PV Advance, MA2000)
• This circuit realizes an ultrafine matte surface of Rz: 1μm (Ra: 0.15μm)
or less
• Rz: 0.4μm (Ra: 0.06μm) is realized with 10×10mm (0.4×0.4")
machining
• Ultrafine electrical-discharge mark is formed with the NP2 circuit
Narrow gap circuit (standard for all Advance models)
• Electrode wear is suppressed when machining a steel workpiece
with a small copper or copper tungsten electrode
• Compatible with small undersize amounts of 0.015 to 0.03mm 
per side (0.0006 to 0.0012")
Model
Workpiece material
Electrode material

In-corner R
Surface roughness
Machining time
EA8PV Advance
ELMAX
3 copper electrodes

(electrode undersize 0.05mm (0.002") per side)

0.010mm (0.0004")
Rz: 0.50μm Ra: 0.10μm
45 minutes
Machining of 16 shapes with undersize amount 0.05mm per side
(shape comparison after 16 cuts are made using the same electrode)
Comparison of electrical-discharge marks on optimum 
surface machined with PS circuit and NP2 circuit
Without α-SC circuit With α-SC circuit
PS circuit (Rz: 0.7μm) NP2 circuit (Rz: 0.4μm)
Reduces wear by 10 to 20%
(comparison with conventional Mitsubishi Electric EDM)
Reduces wear by 20 to 30%
(comparison with conventional Mitsubishi Electric EDM)
Realizes Rz: 0.4μm 
(Ra: 0.06μm)
Machining of four shapes with undersize amount 0.05mm per side
(shape comparison after 4 cuts are made using the same electrode)
Without narrow gap circuit With narrow gap circuit
0.201mm/div0.201mm/div
Rib and Gate Machining
Uniform electrical-discharge gap control:
FIT control (standard for all models)
Examples of rib machining
Both low-wear and high-speed machining are required for rib
machining of die-cast and plastic molds. The discharge of sludge
is especially important.
• A uniform machined surface is easily attained during rib machining
with long thin electrodes, can flex under the normal gap hydraulics,
directly effecting the surface finish
Machining stabilizing jump control: 
SS Jump 3
(standard for all models)
• This control is effective during jump up operations, when using an
electrode with low rigidity, such as for thin ribs
• The load on the electrode is reduced by optimized smoothing of the
jump movement, thereby stabilizing machining and increasing the
speed
Model EA12V Advance
Workpiece material NAK55
Electrode material Graphite
Machining depth 70mm (2.8")
Surface roughness Rz: 10μm Ra: 1.7μm
Machining time 7.5 hours
Super-low-wear circuit: SC circuit (standard for all models)
Example of gate machining
The discharge of sludge is especially important for gate
machining, which is required for plastic molds.
• This circuit is effective when machining with copper electrodes,
during which low-wear machining is essential
• The electrode wear is reduced by 10 to 50% during rough machining
with an undersize amount of 0.07mm per side or more (0.0028")
(comparison with conventional Mitsubishi Electric EDM)
• By suppressing the electrode wear and reducing the number of
electrodes used, the total machining time can be shortened and
costs can be reduced
Model EA12V Advance
Workpiece material SKD11
Electrode material Copper
Machining depth 40mm (1.6")
Surface roughness Rz: 5μm Ra: 0.93μm
Machining time 1.3 hours/hole
Cross-section of 4th spool machined hole
Without SC circuit With SC circuit
Without FIT With FIT
High-grade rib machining
High-grade gate machining
Reduces wear by 10 to 50%
(comparison with conventional Mitsubishi Electric EDM)
0.4mm (0.016")
(machining depth 20mm (0.8"))
Position
Z-axis jump path
Generated
negative pressure
Jump direction
Time
Without SS Jump 3
With SS Jump 3
Jump up
Jump down
Z-axis
load
Electrode-to-
workpiece
pressure
Time

5 6
0.125mm
0.074mm
Product Line-up Machining Samples
Total Solutions
Machine Specifications
and Options
Advance Series
Functions and Features
EA Series Functions
and Features
Advance Series
Product Introduction
MA, EA Series
Product Introduction
Advance Control Unit
Tooling
64-bit Control Unit
Power Supply/Control
Specifications
Preparation for
Machine Installation
Precautions