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Positioning Control Board – FUJI EP-3358C-C
The EP-3358C-C is an electronic positioning control board (“Positioning Control Board”) manufactured by FUJI Electric, designed for use in CNC systems and industrial automation equipment of the same make. The board handles axis position control and feedback processing from encoders or resolvers, interfacing with the servo drives within the same control system. It is not a CPU or generic I/O module, but a dedicated unit for precise machine axis positioning.
The positioning board is the electronic module that closes the position loop in the CNC system: it processes axis encoder feedback signals, calculates position error, and generates correction references for the servo drives. Without it, precise axis positioning is impossible: any machining operation requiring tight geometric tolerances would produce out-of-tolerance parts or risk collisions due to position reference errors.
FUJI Electric is a Japanese manufacturer with over a century of history in industrial electronics, founded in 1923 as a joint venture between Furukawa Electric and Siemens. Specialised in power electronics, drives, CNC systems and factory automation (FA), its product lines include the FRENIC inverter series and Alpha servo systems. Products in the EP-3358C-C family belong to a legacy / discontinued generation of controls and are available only as used units, NOS stock, or through specialist repair services.
Main Technical Specifications
| Type | Positioning control board (Positioning Control Board) |
| Part number | EP-3358C-C (EP3358CC) |
| Brand | FUJI Electric (legacy) |
| Known application | FUJI Electric CNC systems and industrial automation equipment |
| Function | CNC axis positioning control and regulation |
| Feedback | Incremental encoder / resolver (typical FUJI systems) |
| Logic supply voltages | ±15 V and +5 V DC (typical FUJI control boards) |
| Interfaces | Edge / flat cable connectors towards CPU and servo drives |
| Axes managed | ~1–4 axes |
| Weight | ~0.3–0.8 kg |
| Dimensions | ~150–280 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |