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Large-format CNC with a choice of GRBL or Masso control, three working-area sizes
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The Mega V 2 covers three sizes on one build: Standard at 19 x 19 x 5.25 in (6.25 in Z stroke), XL at 35 x 35 x 5.25 in (6.25 in Z stroke), and XXL at 50 x 50 x 5.25 in (6.25 in Z stroke). It runs high-speed steel rack-and-pinion drive on X and Y with an improved screw-drive Z axis and linear profile rails on every axis, and ships with a router mount for the Makita RT0701C or DeWalt DW618 (router not included) or an optional 1.5kW or 2.2kW VFD spindle, with a 2.2kW automatic tool changer option. Assembly is required; instruction booklets are provided.
Every cut starts with one formula: Feed Rate = Spindle Speed (RPM) x Chip Load x Number of Cutting Edges (flutes). Chip load is the thickness of material each cutting edge removes in one revolution of the bit. This number comes from the manufacturer of the bit, which publishes a chip-load chart for each bit diameter and material. Look up your exact bit and material, start from the middle of the published range, and you have the third number in the formula. The chart below shows the recommended spindle speed for each material and bit type.
The Mega V 2's spindle depends on what you order: a router mount with no spindle included, or an optional 1.5kW or 2.2kW VFD spindle. Check whichever unit you have for its actual RPM against the chart. Its high-speed steel rack-and-pinion drive and linear profile rails on every axis are built for real rigidity. A truly rigid machine with a powerful spindle can cut as deep as the bit is wide in a single pass, but that takes real spindle torque, a drive train and clamps that hold firm, a gantry that will not flex, and enough mass to soak up vibration. With the VFD spindle option, the Mega V 2 gets close to that bar; with just a router mounted, treat it more conservatively and take shallower passes. Push too deep and the bit deflects and chatters, leaving scalloped edges, or it rubs instead of cutting and burns the material. The fastest way to dial in a cut is to see what has already worked for other people.
Worked example for feed rate: 1/8in (3.175mm) two-flute solid carbide end mill in hard wood. The chart says 16,000 RPM. The Mega V 2's spindle depends on what you order, so check the RPM on your spindle's plate or VFD readout and use that number if it differs from 16,000. With the bit maker's 0.025mm per tooth (0.0010 in), at 16,000 RPM: 16,000 x 0.025 x 2 = 800 mm/min (31 in/min) feed. For depth per pass, start shallow and check Community Cut Settings in Easel for what works on this machine. If the cut sounds strained, reduce the depth, not the feed. Slowing the feed below the chip load makes the bit rub instead of cut.
Community Cut Settings shows the spindle speed, feed rate, and depth per pass other makers actually run for your machine, material, and bit.
The Mega V 2 ships with a choice of control system: order it with the GRBL Control System to connect over USB through the free Easel Driver, install the driver on your Mac or Windows computer, design in the browser, and use the Carve button to walk through homing, zeroing, and carving. Order it with Masso G3 Touch Control instead and you get a standalone industrial touchscreen controller; Easel's real-time carving connects to machines over USB through GRBL controllers, so the Masso option does not connect through the Easel Driver the same way. Choose GRBL at checkout if you plan to run this machine with Easel. In Easel's menu, select 'Mega V2' (19 x 19 x 5.25 in), 'Mega V2 XL' (35 x 35 x 5.25 in), or 'Mega V2 XXL' (50 x 50 x 5.25 in) to size the canvas to your machine; the matching '(non-GRBL)' entries are for machines ordered with Masso control.
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