***Pre-orders start October 29. Come back soon!***
The AltMill 4×8 is the next generation of prosumer CNCing. Designed for power, precision and production, the 4×8 has the reliability and rapidity professionals need, and the value and rigidity advanced users want. Built for sheet goods, the AltMil 4×8 is a turnkey CNC that makes large format cutting a breeze.
Highlights include:
- Production level cutting speeds (approx. 1,000 inches per minute)
- Closed loop motor system on all three axis to auto-correct positioning and auto-stop when necessary (reliable for production style work)
- Requires little maintenance during project production
- Advanced, production-style features including Y-axis auto-squaring; limit switches by default; and tram adjustment capabilities
- Cuts materials ranging from hardwoods to plastics, foams, composites, aluminum – even steel
- Support for 80mm spindles and routers
- 49.8″ x 104″ working area with a max Z-height of 8.3″ (1265 mm × 2640 mm × 210 mm)
- Footprint of roughly 66″ wide and 114″ deep
The AltMill 4×8 comes with a standard 80mm spindle mount only. It does not come with a spindle or an Automatic Tool Changer system, which must be purchased separately.
Quick highlights:
- 104" Y-Axis Travel
- 50" X-Axis Travel
- 8" Z-Axis Clearance
- High-Torque Closed-Loop Stepper Motors
- 1,000 IPM Traverse Speed
- Rack & Pinion with Gearbox Reduction on Y-Axis
- Precision Ball Screws on X & Y Axes
- SLB-Ext 32-bit Controller with grblHAL Firmware
- 120VAC, Single Phase 4A Power
In depth specs:
- Footprint: Roughly 66″ wide and 114″ deep
- X, Y, Z Axis Working Area: 1265 mm × 2640 mm × 210 mm (49.8″ x 104″ x 8.3″)
- Z-axis Maximum Stock Clearance: 203 mm (8″)
- Rapid Traverse Speed: Approx. 25,000 mm/min (1,000 IPM) in Y-axis; 16,000mm/min (590 IPM) in X-axis; 6,000mm/min (236 IPM) in Z-axis
- Repeatability: ±0.05 mm (±0.002″)
- Motion System: Rack and pinion using precision gearbox reduction on Y-axis; 16mm precision ball screw on X-axis; 12mm precision ball screw on Z-axis
- Linear Motion: 15mm profiled linear guide rails and bearing blocks on all axes
- Drive Motors: High-Torque NEMA 23 Closed-Loop Stepper Motors. 3NM torque on Y-axis; 2NM torque on X and Z axes.
- Control System: SLB-Ext 32-bit controller with grblHAL firmware
- Power Requirements: 120VAC, Single Phase, 4A (Spindle power requirements listed separately)
- Weight: Approximately 400lbs as assembled, not including weight of add-ons such as spindles
- Spindle Mount: Supports 80mm spindles and routers
- Frame Construction: Rigid frame and linear motion design using HGR15 linear guides and ball screws on all axis mounted to a custom-designed, machined aluminum extrusion; with sturdy metal legs with the ability to add 4ft wide shelving underneath for sheet goods
Pre-orders for the 4×8 start October 29, with expected delivery date to begin late February/early March 2026. For more info on expected shipping and delivery times, please see the Sienci Order Status page
Altmill
Item SKU: ALTMILL48
