GF Machining Solutions Sinker EDM (Ram EDM)

GF Machining Solutions Form 3000 Sinker EDM

$450,000 – $900,000 Updated 2026-03-17

Key Specifications

Work Tank Dimensions

Approx. 1,500 x 1,000 mm

X/Y/Z Travel

1,000 x 800 x 500 mm

Max Workpiece Weight

5,000 kg

Dielectric System

Petroleum (kerosene) or deionized water, integrated filtration

Surface Finish Ra

Ra 0.1 micron (mirror conditions); Ra 0.4–0.8 standard finishing

Control System

GF Machining Solutions AC CNC with iGEN4 adaptive generator

Overview

The GF Machining Solutions Form 3000 is a large-format CNC sinker EDM machine targeting heavy mold and die applications requiring substantial work tank capacity and high workpiece weight tolerance. Designed and manufactured by GF Machining Solutions — the precision manufacturing division of Georg Fischer AG, headquartered in Biel/Bienne, Switzerland — the Form 3000 addresses the upper tier of the sinker EDM market where automotive stamping dies, large plastic injection molds, forging dies, and aerospace structural tooling require tank dimensions and workpiece capacity beyond mid-range machines.

The Form 3000 features a work tank of approximately 1,500x1,000mm and accommodates workpieces weighing up to 5,000 kg, placing it firmly in the large-format die and mold segment. GF Machining Solutions' AC FORM generator technology with iGEN4 adaptive intelligence governs spark parameters in real time, maintaining optimal cutting conditions as electrode-to-workpiece contact area changes across complex cavity geometry. This adaptive capability is especially important in large-cavity burns where varying cross-sections can destabilize less sophisticated generators, leading to poor surface finish uniformity or electrode wear.

The Form 3000 integrates with GF Machining Solutions' System 3R and Erowa pallet automation platforms, enabling fully automated multi-electrode sequencing for complex deep-cavity mold burns that require many electrode passes. The machine's large C-axis rotary electrode holder and high-rigidity Z-axis ram support heavy graphite and copper electrode assemblies without deflection. Surface finish capability reaches Ra 0.1 micron under mirror-finish conditions, with standard finishing to Ra 0.4–0.8 micron across large cavity areas.

The Form 3000 is deployed globally in automotive stamping die shops, tier-1 plastics tooling facilities, aerospace structural component tooling rooms, and defense industry die makers. GF Machining Solutions provides dedicated application engineering support for large-format sinker EDM, including generator parameter databases for common die steels, electrode materials, and dielectric types. The machine represents a long-term capital investment targeting the most demanding large-cavity EDM applications.

Full Specifications

Parameter	Value
Work Tank Dimensions	Approx. 1,500 x 1,000 mm
X/Y/Z Travel	1,000 x 800 x 500 mm
Max Workpiece Weight	5,000 kg
Dielectric System	Petroleum (kerosene) or deionized water, integrated filtration
Surface Finish Ra	Ra 0.1 micron (mirror conditions); Ra 0.4–0.8 standard finishing
Control System	GF Machining Solutions AC CNC with iGEN4 adaptive generator
Generator Power	AC FORM iGEN4, 64A peak discharge current
Machine Weight	Approx. 30,000 kg

Strengths & Limitations

Strengths

5,000 kg workpiece capacity handles the largest automotive stamping and forging die blocks
iGEN4 adaptive generator maintains optimal spark conditions across variable cavity geometry in large burns
System 3R and Erowa pallet compatibility enables automated multi-electrode sequencing for complex deep cavities
Ra 0.1 micron mirror-finish capability for surface-critical optical and cosmetic tooling
GF Machining Solutions global application engineering support for large-format sinker EDM

Limitations

Very high capital cost — only justifiable for shops with sustained large-format die and mold workload
Requires substantial floor space, reinforced foundation, and large dielectric filtration system
Mirror-finish conditions on large cavity areas are extremely slow — not practical for rough EDM applications
Machine weight and size make installation, relocation, and maintenance complex compared to mid-range sinker EDMs

Best For

Automotive stamping die shops producing body panel, structural, and chassis tooling requiring deep-cavity EDM Large plastic injection mold makers producing automotive exterior trim and structural component tooling Aerospace structural tooling rooms machining forming dies, hydroforming tools, and composite lay-up molds Forging die manufacturers requiring precise cavity generation in H13, P20, and other high-strength die steels

Frequently Asked Questions

01 What is the Form 3000 work tank size?

The Form 3000 work tank is approximately 1,500x1,000mm with X/Y/Z axis travel of 1,000x800x500mm. This positions it as a large-format sinker EDM capable of accommodating die blocks and mold bases that exceed the capacity of mid-range machines like the Form P 350 or Form 200.

02 How does the iGEN4 generator benefit large-cavity EDM?

In large-cavity burns, the electrode-to-workpiece contact area changes significantly as the electrode sinks into the cavity. Conventional generators with fixed parameters struggle with this variation, causing surface finish inconsistencies and electrode wear spikes. The iGEN4 adaptive generator monitors arc gap conditions in real time and adjusts pulse parameters continuously, maintaining stable machining conditions even as contact area changes by an order of magnitude through the burn depth.

03 Is the Form 3000 available with automated electrode changing?

Yes. The Form 3000 integrates with GF Machining Solutions' System 3R robot and Erowa Robot Compact systems for automated electrode changing. For large-format mold cavities requiring 10–30+ electrode passes with progressively finer electrodes, automated electrode management is essential for lights-out deep-cavity burning over multi-day EDM cycles.