3018 CNC Machine: Carve Wood, Acrylic and PCB on Your Desk

Every 3018 shares the same bones. Stepper motors drive the bed and gantry along guide rods on T8 lead screws, a third motor lifts the spindle, and a small controller board turns G-code into step pulses. Nema17 steppers are the norm, the same size as in most hobby 3D printers. The same frame goes by 3018 CNC engraving machine, 3018 CNC carving machine or desktop CNC 3018 machine, built as one open design by many makers.

• Wood: birch plywood, MDF and hardwood offcuts for signs, coasters and inlays.
• Plastics: cast acrylic, PVC foam board, HDPE and nylon for panels and brackets.
• Circuit boards: copper-clad FR4 for isolation-milled prototypes.
• Soft metal: thin aluminium, brass and copper in light, patient passes.

The three most bought machines split along clear lines. The Genmitsu 3018-PRO kit pairs a 300 × 180 × 45 mm work area with an offline controller, so a job can run from a card with no laptop attached. The Twotrees TTC3018 Pro swaps the usual moulded Z carriage for an all-metal one on a T8 anti-backlash screw. The plain Twotrees TTC3018 keeps the 775 spindle and ER11 collet at the lowest cost of the three.

Harder stock stays off the list: steel, glass, stone and ceramics ask more than a small brushed motor on slim rods can give. The materials and first cuts entry covers those limits and some starter projects. PCB traces and soft aluminium already sit at the edge of what the 775 kits do comfortably.

Next, weigh what arrives in the box. Three extras shape the first week more than spindle watts do:

1. Limit switches let GRBL home the machine with the $H command, so coordinates survive a restart.
2. An E-stop halts motion the moment a clamp or bit goes wrong.
3. A Z-probe sets tool height through the G38.2 probe cycle instead of by eye.

The Genmitsu 3018-PROVer V2 ships with all three, plus a one-piece aluminium spoilboard and a pre-assembled gantry. The 3018-PRO kit trades them for an offline controller; the probe and switches bolt on later through ports its board already has.

A laser plan needs a matching board. CNCTOPBAOS boards take 12V three-pin modules from 0.5W to 20W, and the 3018-PRO bundle with a 5W module in the box skips the search for a compatible head altogether.

Anyone already running a 3018 can skip new frames and go after the part that fixes a specific pain, from Z zeroing to stock that creeps mid-cut. For kit against kit, the 3018-PRO kits compared entry sets every spindle, Z height, offline controller and kit bundle side by side.

The stock 775 is a brushed DC can motor a little over 40 mm across, clamped in a holder and fitted with an ER11 collet. Twotrees runs its 775 at 7,000 to 9,000 rpm; CNCTOPBAOS rates its version at 120W and 10,000 rpm on 24V. The 500W spindles on the LUNYEE Pro Max, the WolfPawn 500W and the ACMER Ascarva 3S reach 12,000 rpm and sit in 52 mm holders.

Z travel matters less for depth of cut than for clearance. The 80 mm Z on the Pro Max clears a vise, a tall clamp or a thick hardwood blank. A 40 mm Z, as on the TTC3018, limits work to thin sheet once bit and collet hang below the holder.

Rigidity is the quiet column. These are the signs of a stiffer frame:

• A metal Z carriage in place of a moulded one, as on the TTC3018 Pro.
• Anti-backlash nuts on the T8 screws, which stop the bit wandering on direction changes.
• Linear guide rails instead of round rods, like the HGH15 on the Pro Ultra's X axis.
• Mass: the Pro Max weighs 13 kg, close to twice the 15.3 lb of a 3018-PRO.

More power on a flexible frame only turns into louder chatter. The 3018 Pro Max comparison sets the 500W frames against each other.

Plywood is the forgiving start. Watch for tear-out on the top veneer and for glue lines, which dull bits faster than the wood around them. A down-cut bit leaves a cleaner face on signs.

Hardwoods such as maple and walnut sit between plywood and acrylic. Shallower passes than plywood and a sharp bit keep scorch marks off the edges.

Cast acrylic cuts clean as long as chips leave the groove. Extruded sheet melts and welds shut behind the bit. When a gummy ribbon fills the slot, raise the feed or drop the rpm so each flute takes a real chip.

• PCB: flatness rules. A board 0.1 mm out of level loses traces on one side, so many owners run a height-map probe pass in Candle before isolation milling.
• Aluminium: mist on a little lubricant or alcohol, clear chips often, and expect a 500W frame to take deeper passes than a 775.
• Brass: chips break short and the finish comes up bright, which makes it kinder than aluminium for small nameplates.

The order to add them follows the problems a new owner meets, not the size of the upgrade:

1. A touch probe such as the SainSmart Z-axis probe: clip the lead to the bit, run the probe cycle, and GRBL sets Z zero on its own.
2. Low-profile side clamps like the Fuzqq four-pack, which grip from the edge on M6 holes or T-track and stay below the stock surface.
3. An MDF spoilboard, 300 × 180 × 12 mm with M6 holes, so through-cuts end in sacrificial board instead of the aluminium bed.
4. Limit switches and an E-stop, for homing and a hard stop.
5. A faster spindle: the Genmitsu GS-775M runs 20,000 rpm on 24V, paired with a 24V 4A supply sized for its start-up current.
6. A Y-axis extension to 3040 size once boards outgrow 180 mm.

Two more groups change what the machine does rather than how well it does it. Diode laser modules from 5W to 10W bolt into the spindle holder and take PWM from the same board. A rotary module turns pens and handles on the PROVer V2, holding pieces up to 40 mm across and 184 mm long.

Then come the comfort parts:

• Dust shoes for 42 mm or 52 mm motors, on a 38 mm vacuum hose, keep MDF dust off the rods and screws.
• The KABA Lite enclosure, a 450 × 390 × 300 mm PETG box, cuts noise and keeps chips on the desk.
• Wi-Fi and offline controllers free the machine from a laptop cable.

The upgrades in order of payoff entry takes each part in turn, with fit checks for the Genmitsu, Twotrees and LUNYEE frames.

• Spindle diameter. Stock 775 holders take a 42–43 mm body, 300–500W spindles need a 52 mm mount, and trim routers need 65 or 69 mm. Genmitsu's aluminium Z-axis assembly V2 ships with both 43 and 52 mm holders.
• Rods and screws. Extension kits such as the Daedalus X/Y kit expect an 8 mm T8 lead screw and 10 mm guide rods.
• Hole pattern. Clamps and spoilboards bolt through M6 holes or T-slots. LUNYEE's MDF board follows the Pro Max and Pro Ultra table, so other beds need a hole check.
• Supply voltage. Most 3018 boards run on 24V, FoxAlien's older FAC30 3018-SE V2 takes a 12V brick, and the 500W frames carry their own supplies.

Genmitsu splits its own line in two. The 3018-PRO and 3018-MX3 share one Y-axis extension kit; the 3018-PROVer V2 takes a different kit that adds 220 mm of Y travel for 420 mm in total. The T-slot 3040 aluminium spoilboard fits the 3018-PRO but not the PROVer V2.

Controller boards follow the same logic. A replacement GRBL 1.1 board has to match the stepper drivers, the 24V input and the laser header of the machine it replaces; the MKS DLC32 V2 adds a 32-bit chip, Wi-Fi and a touch screen in one kit.

Twotrees, CNCTOPBAOS, RATTMMOTOR, VEVOR and LUNYEE frames all speak GRBL, so senders and CAM files carry across. The every 3018 maker entry traces which frames share parts.

1. Design the part in Easel, Carveco, Fusion 360 or any CAD that exports SVG or DXF.
2. Generate toolpaths in CAM: pick the bit, depth per pass, feed and spindle speed for the stock.
3. Connect through the USB cable; many boards use a CH340 serial chip that wants a driver on older Windows.
4. Send the file from Candle or Universal Gcode Sender, or copy it to the SD card of an offline controller.
5. Zero X and Y at the stock corner, then Z with the probe, and start the job with a hand near the stop.

GRBL keeps its own settings, listed with the $$ command: steps per millimetre, maximum rates, acceleration and whether homing is on. Kits arrive set for their own screws and motors, so those values can stay alone until a part measures wrong. Once homing works, GRBL's soft-limits setting stops any job that would run past the travel.

Bench rules for a desk router stay short:

• Eye protection whenever the spindle turns, since small end mills snap without warning.
• A dust shoe and vacuum, or at least a mask, for MDF and its fine dust.
• Laser work only behind goggles rated for 450 nm or a shielded enclosure.
• No running job left alone, least of all a laser over wood.

The 3018 software setup entry walks through Candle, UGS and LaserGRBL, and the laser module guide covers diode heads from 5W to 10W.