Overview

The document presents the ETESIAN line of high-performance gantry-type CNC machining centers manufactured by Promac in Italy. These machines support 3, 3+2, and 5-axis continuous machining for medium to large-sized workpieces, targeting sectors such as mold construction, automotive, aerospace, energy, precision prototypes, and general tooling.

Machine Architecture and Concept

The ETESIAN machines feature a movable gantry with a transversely translated upright and a fixed saddle, ensuring maximum rigidity and precision across the entire work area. Linear axis movements utilize generously dimensioned rectified guides, preloaded roller slides, and double lead nut recirculating ball screws. For axis strokes exceeding 6 meters, an electronically preloaded rack-and-pinion drive system is employed.

Technology and Control

Designed using FEM analysis, the ETESIAN structure guarantees high rigidity, dynamic performance, and accuracy. The machines incorporate advanced numerical controls and digital drives for high-speed, precise positioning. Thermal compensation algorithms monitor internal and external machine temperatures to electronically offset residual thermal expansion.

Tool Heads

• Automatic Orthogonal Fork Head (HTH): Supports HSK A63/HSK A100 tool tapers, suitable for 3+2 or 5-axis continuous machining with power machining capabilities.
• Automatic Orthogonal Index Head (TA): Also supports HSK A63/HSK A100, designed for roughing, semi-finishing, and finishing in 3+2 or 5-axis continuous machining.
• Horizontal Head (TO): Supports HSK A63/HSK A100, intended for 3-axis high-speed roughing and semi-finishing.

Technical Specifications

Rotary Axes and Spindle Details

• Axis A rotation: ±110° (HTH and TA heads)
• Axis C rotation: ±200° (HTH and TA heads)
• Positioning: Continuous path for HTH, index/continuous for TA, fixed for TO
• Electro-spindle speed range: 3,000 to 20,000 rpm
• Power: 25 to 45 kW
• Torque: 80 to 800 Nm
• Spindle taper: HSK A63 or HSK A100
• Tool changer capacity: Standard 20 tools, optional 24 to 200 tools

Standard Equipment

• CE-compliant integral safety cabin with lighting
• Preloaded double-circuit recirculating ball screws for axis transmission
• Linear guides with roller recirculation in X configuration
• Automatic chip evacuation system for low chip volume
• High-resolution linear optical axis measurement system
• Electronic portable handwheel with jog controls
• Electro-spindle temperature control and cooling system
• Standard tool changer with 20 positions (HSK A63/HSK A100)

Optional Accessories

• Tool changers with 24 to 200 positions (HSK A63/HSK A100)
• Touch probe system for workpiece measurement
• Laser tool presetting system
• High-volume chip evacuation system
• Dust extraction system
• Spray mist lubrication and cooling system (air/oil nebulized)
• High-pressure internal tool cooling system (24 bar, 30 l/min)
• Rotary tables with diameters 1000, 1500, 2000 mm

Manufacturer and Legal Notes

Promac, located in Salzano, Venice, Italy, reserves the right to modify product specifications without notice to improve performance. All rights reserved; unauthorized reproduction or publication of the catalog is prohibited.