GF Machining Solutions Form P 350 Sinker EDM

$200,000 – $450,000 Updated 2026-03-17

Key Specifications

Tank Work Area

500x350 mm

Axis Travel

350x250x350 mm (X/Y/Z)

Maximum Workpiece Weight

800 kg

Generator

AC FORM with iGEN4 adaptive intelligence

Electrode Changer

Up to 60-position System 3R or Erowa compatible

Surface Finish

Ra 0.05 micron (mirror finish conditions)

Overview

The GF Machining Solutions Form P 350 (Charmilles Form P 350) is a CNC sinker EDM machine from GF Machining Solutions, the EDM, milling, and laser division of Georg Fischer AG. The Form P 350 targets precision mold making, automotive powertrain tooling, and medical device manufacturing with its AC FORM generator technology, which minimizes electrode wear and delivers superior surface finish on deep cavities. The machine features a 500x350x350 mm work tank and accommodates workpieces up to 800 kg. GF Machining Solutions' intelligent power module technology, iGEN4, provides real-time adaptive spark control across variable cavity geometry, maintaining stable machining conditions as electrode-to-workpiece contact area changes. A 3R or System 3R electrode changer (up to 60 positions) enables lights-out electrode management for complex mold cavities requiring multiple electrode passes. The integrated Erowa Robot Compact gripper system coordinates electrode handling with the EDM control. The Form P 350 is used globally in automotive plastic injection tooling, consumer electronics mold making, and precision aerospace components.

Full Specifications

Parameter	Value
Tank Work Area	500x350 mm
Axis Travel	350x250x350 mm (X/Y/Z)
Maximum Workpiece Weight	800 kg
Generator	AC FORM with iGEN4 adaptive intelligence
Electrode Changer	Up to 60-position System 3R or Erowa compatible
Surface Finish	Ra 0.05 micron (mirror finish conditions)
C-Axis	CNC C-axis rotation (optional)
Control	GF Machining Solutions AC CNC
Positioning Accuracy	±0.001 mm
Power	380V, 3-phase

Strengths & Limitations

Strengths

iGEN4 adaptive generator automatically adjusts to changing cavity geometry
Ra 0.05 micron mirror-finish capability for optical and cosmetic mold surfaces
Up to 60-position electrode changer for complex multi-electrode mold cavities
System 3R and Erowa compatible — integrates with most mold shop pallet systems
GF Machining Solutions global support network (formerly Charmilles)

Limitations

High price compared to Asian sinker EDM competitors of similar table size
Complex electrode management system requires trained EDM programmers
Mirror finish conditions are extremely slow — Ra 0.05 is reserved for final finishing passes only
Electrode changer adds capital cost and floor space requirements

Best For

Automotive injection mold shops producing cosmetic and functional tool surfaces Consumer electronics mold makers requiring mirror finish on visible part surfaces Medical device manufacturers machining complex implant and instrument tooling Precision aerospace tooling shops producing deep-cavity forming dies

Frequently Asked Questions

01 What is AC FORM generator technology?

AC FORM is GF Machining Solutions' alternating current EDM generator that reduces electrode wear by periodically reversing spark polarity. This maintains electrode geometry longer during deep cavity burns, reducing the number of electrodes required per job.

02 Is the Form P 350 compatible with Erowa workholding systems?

Yes. The Form P 350 features Erowa-compatible tooling interfaces on the electrode holder and optional workpiece clamping, enabling seamless integration with Erowa Robot Compact and ITS automation systems common in European mold shops.

03 What is the difference between the Form P 350 and the Form P 600?

The Form P 600 has a larger 700x500 mm tank and increased workpiece weight capacity, targeting larger mold blocks and structural components. The Form P 350 is optimized for medium-size automotive and consumer electronics tooling.