GF Machining Solutions AgieCharmilles FORM P 900
Key Specifications
X Travel
Y Travel
Z Travel
travel c
max workpiece size
max workpiece weight
Overview
The GF Machining Solutions AgieCharmilles FORM P 900 is the flagship model of the FORM P series — the largest and most capable sinker EDM in GF's performance lineup. With X/Y/Z travels of 900 x 600 x 500 mm and a workpiece capacity up to 1,500 x 1,100 x 700 mm rated at 5,000 kg (11,023 lb), the FORM P 900 is engineered for the largest and most complex die-sinking applications: large automotive body panel dies, massive injection mold cores, aerospace structural tooling, and heavy-duty die casting molds.
The scale of the FORM P 900 places it in a class shared only by a handful of large-frame sinker EDMs worldwide. At this size, thermal management becomes even more critical — the larger machine structure amplifies the effect of thermal growth on dimensional accuracy. GF Machining Solutions addresses this with the full Intelligent Thermal Management (ITM) system, which includes an elevated number of sensors and compensation zones proportional to the machine's larger footprint, ensuring the same level of dimensional control found in the FORM P 600 is maintained across the larger work envelope.
The AC FORM control on the FORM P 900 manages multi-electrode operations with full Automatic Electrode Changer (AEC) support, enabling unattended sequential sinker EDM operations — a necessity for large cavity work where multiple electrode geometries and sizes are required to rough out and finish complex 3D forms. The machine's high electrode weight capacity (up to 300 kg) accommodates the large graphite or copper electrodes needed for roughing passes on massive cavities.
Applications for the FORM P 900 include automotive body die construction, where panel cavities are too large for mid-size sinker EDMs, as well as large-part aerospace tooling and heavy die casting mold work. The machine's ability to sink deep cavities — up to 500 mm Z-travel — enables die work on deep-draw stamping dies and deep core cavities that require prolonged sinker EDM cycles.
Pricing for new FORM P 900 machines ranges from $250,000 to $400,000, reflecting the machine's size, the sophistication of its ITM and IPG systems, and the small number of manufacturers capable of producing sinker EDMs at this scale. Competitors include the Makino EDAC8, Mitsubishi EA40V, and ONA AV80 in the large-frame sinker EDM segment.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 900 mm (35.4 in) |
| Y-Axis Travel | 600 mm (23.6 in) |
| Z-Axis Travel | 500 mm (19.7 in) |
| Travel C | ±180° |
| Max Workpiece Size | 1,500 x 1,100 x 700 mm (59.1 x 43.3 x 27.6 in) |
| Max Workpiece Weight | 5,000 kg (11,023 lb) |
| Max Electrode Weight | 300 kg (661 lb) |
| Surface Finish | Ra 0.1 µm (VDI 3, mirror finish) |
| Dielectric | Dielectric oil |
| Thermal Management | Intelligent Thermal Management (ITM) with multi-zone active compensation |
| CNC Control | AC FORM (GF Machining Solutions proprietary sinker EDM control) |
| Power Supply | Intelligent Power Generator (IPG) |
| Auto Electrode Changer | Compatible (AEC option) |
| Machine Weight | 12,000 kg (26,455 lb) |
Strengths & Limitations
Strengths
- 900 x 600 mm X/Y travel and 5,000 kg workpiece capacity handle the largest automotive, aerospace, and die casting tooling — applications simply impossible on mid-size sinker EDMs
- Multi-zone Intelligent Thermal Management (ITM) maintains dimensional accuracy across the large machine structure during extended multi-day sinking operations on massive die cavities
- 300 kg electrode weight capacity accommodates the large graphite and copper electrode sets required for roughing passes on automotive body dies and large mold cores
- Full AEC integration enables automated multi-electrode sequences on complex large cavities, providing lights-out productivity on jobs that would otherwise require continuous operator attendance
- IPG power supply with full technology database ensures consistent finish quality from roughing to VDI 3 mirror finish, even on jobs spanning multiple shifts and operators
- Deep 500 mm Z-travel capability allows work on deep-draw stamping dies, deep core cavities, and large-scale aerospace structural tooling that requires significant ram travel
Limitations
- At $250K-$400K, the FORM P 900 represents a major capital investment justified only by a steady volume of large-cavity tooling work — most job shops and smaller moldmakers need a smaller machine
- The machine's large footprint and 12,000 kg weight require significant floor space, reinforced concrete foundations, and careful facility planning before installation
- Large-frame sinker EDMs accumulate dielectric oil — fire suppression systems, larger filtration units, and oil disposal are proportionally more demanding and costly at this machine size
- Long electrode and workpiece change times on large jobs add setup overhead — the AEC system helps, but handling 300 kg electrodes requires appropriate lifting equipment and fixturing
Best For
Frequently Asked Questions
01
The FORM P 900 is for moldmakers and toolmakers whose workpieces and cavity dimensions exceed what a FORM P 600 can physically accommodate — specifically X/Y travel beyond 600 x 400 mm or workpieces weighing more than 2,000 kg. Typical FORM P 900 customers are automotive Tier-1 die shops, large mold builders producing bumper and instrument panel tools, and heavy die casting mold manufacturers. If your work regularly fits within a 600 x 400 mm footprint, the FORM P 600 or even FORM E 600 is more cost-effective.
02
Yes, with the AEC (Automatic Electrode Changer) option. Large cavity work often involves multi-electrode sequences — a large roughing electrode removes bulk material, followed by progressively smaller or more detailed finishing electrodes. The AEC stores multiple electrodes in a carousel, and the AC FORM control cycles through them automatically. This enables 16-24 hour unattended operation on large cavity jobs. Operators load electrodes and the workpiece, set the program, and return to a finished or substantially progressed cavity. Fire suppression is mandatory for unattended oil-dielectric operation.
03
Large machine structures amplify thermal effects — a 1°C temperature change causes proportionally more dimensional shift in a machine with 900 mm of axis travel than in one with 400 mm. GF's ITM system for the FORM P 900 includes a larger number of distributed temperature sensors and compensation zones than the smaller FORM P models, and the compensation algorithms are tuned for the specific thermal mass and characteristics of the larger structure. The system continuously adjusts axis positions to counter measured thermal growth, maintaining accuracy over multi-day sinker EDM cycles even in shop environments without precision climate control.
04
The FORM P 900 supports electrode weights up to 300 kg (661 lb). In practical terms, a large graphite roughing electrode for a major automotive body panel cavity might be 600 mm x 400 mm x 150 mm — well within this capacity. The machine's Z-axis ram is designed to handle the moment loads from large offset or irregularly-shaped electrodes. For the largest and heaviest electrodes, shops use overhead cranes or manipulators to load electrodes onto the ram fixture. The AEC option can manage electrodes within its carriage weight rating for automated changeover.
05
New FORM P 900 machines price between $250,000 and $400,000. Used machines are considerably rarer than smaller sinker EDMs, as fewer were built and large-frame sinker EDMs tend to stay in service for long periods in the die shops that purchased them. When available, used FORM P 900 or equivalent large-frame GF sinker EDMs from the 2010s can be found in the $80,000-$180,000 range depending on age, condition, and control generation. Buyers should factor in ITM sensor calibration, oil system service, and AEC inspection before purchasing used.
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