CNC Router with a 60greenBull Version 2 60° angled table to save space and provide ease of part removal. Can accommodate a future laser gantry (in design phase). The bed is formed to house a 4th axis along the middle of the bed.
The kit version of this machine will be available when the assembly instructions are completed.
This CNC router has the capability of automated cutting, milling, drilling, 3D carving and pocketing (all subtractive fabrication). Materials that this CNC router can cut or engrave is soft metals (aluminum, brass, mild steel, wood of all types, plastics of all types, foam and other similar materials).
Machine Technical specifications:
- Maximum stock size: 4'x8'- Travel: X=8 feet, Y=4 feet, Z=7 inches- Spindle: 220V 2.2kW Spindle and VFD- Stepper motors: X and Y use a NEMA 34 651 oz-in, and the Z uses a NEMA 24 425 oz-in- Mechanical method of movement: X axis use roller chain and drive sprockets and the Y and Z use 1/2" lead screw- Structure based around MDO (Medium Density Overlay), Aluminum Y carriage, Steel Rails with HIWIN specifications- Interface: Pokeys57CNC
Accuracy and Precision
The resolution per axis is variable as you can change the driver's microstepping, but I typically set the parameters so that the mechanical and digital combination configuration yields greater than 1000 steps per inch. The x and y axes mechanical systems are based on roller chain which is tensioned. This provides a reduction in backlash, so the precision is very good (repeatability). The accuracy is generally based on how well the machine in calibrated and squared. Squaring is very simple as the gantry is squared by a combination of adjusting the roller chain sprockets on each side of the gantry and the adjustment of the gantry back hardware. Once the machine is squared and in a relaxed state, the hardware is tightened to maintain square permanently. Calibration is done through software and is as accurate as the physical measurement system is.