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3-Axis Servo Drive – VICKERS DBM-3A
The DBM-3A is a 3-axis servo amplifier drive (“3-Axis Servo Drive Module”) manufactured by Vickers, designed for the simultaneous control of three servo axes in CNC machining plants (vertical and horizontal machining centres, CNC milling machines, special-purpose machines). The module integrates within a single chassis the speed and current regulation circuits for each of the three axes, interfacing with the CNC controller via analogue speed references and with the DC servo motors of the machine axes via the internal power stage. Different production variants are documented; compatibility with the target CNC system version must be verified.
The 3-axis drive is the electronic core that converts the position and speed commands generated by the CNC controller into drive currents for the X, Y and Z axis servo motors: it ensures synchronisation of interpolated movements and tool-path accuracy during machining. A failure of the DBM-3A causes the immediate shutdown of all three machine axes, making any machining cycle impossible and requiring urgent replacement of the module to restore production.
Vickers is a historic US manufacturer of power transmission components, originally specialised in industrial hydraulics (pumps, valves, actuators) and subsequently extending into electronic axis control for CNC machine tools. The brand was acquired by Eaton Corporation and absorbed into the Eaton Vickers division. Products from the electronic axis control line are legacy / discontinued: available exclusively as used, surplus or through specialist repair.
Main Technical Specifications
| Type | 3-axis servo amplifier drive (3-Axis Servo Drive Module) |
| Part number | DBM-3A (DBM3A) |
| Brand | Vickers (Eaton Vickers – legacy) |
| Number of axes | 3 servo axes (X, Y, Z) |
| Known application | CNC machining centres, milling machines and machine tools with Vickers control system |
| Function | Speed and current regulation for three DC servo motors of the machine axes |
| Supply voltage | 115 V / 230 V AC, 50/60 Hz |
| Reference signal | Analogue speed reference ±10 V per axis |
| Feedback | DC tachogenerator or incremental encoder from axis servo motor |
| Output current per axis | ~5–30 A continuous per axis |
| Interfaces | Terminal strip and/or edge connectors; enable and fault inputs per axis |
| Weight | ~3–8 kg |
| Dimensions | ~300–500 × 200–400 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |