CNCTOPBAOS 3018-PRO CNC Router

The frame mixes materials. Side plates are PA6 nylon, the gantry and base rails are aluminium profile, the worktable is aluminium and the screws are stainless. Nylon keeps the weight down to 6.7 kg and damps some vibration, but it flexes more than an all-metal frame under a heavy cut.

The spindle sets what the machine is good at. A 775 motor rated 120 W reaches 10,000 rpm at 24 V, which suits small bits in soft and medium materials:

• Pine, basswood and plywood: signs, coasters and V-carved lettering.
• Expanded PVC and foam board: fast, clean profile cuts for models and signage.
• Cast acrylic: engraving and thin cut-outs with a single-flute bit.
• FR4 and FR1 copper-clad board: isolation milling for prototype circuit boards.
• Brass, copper and aluminium: engraving and very light passes, as CNCTOPBAOS lists them.

The GRBL 1.1f board is the better half of the package. It sits in a case with a fan and power switch, and it has ports for an E-stop, probe, three limit switches and the offline controller, so every common 3018 add-on plugs straight in.

The broader 3018-PRO comparison puts this kit next to the other builds of the same frame.

The offline controller reads G-code from an SD card and lets you jog X, Y and Z, set the work zero and start or stop the spindle with no computer attached. It is the difference between a laptop tethered to the machine for every job and a machine that runs on its own in the garage.

Limit switches and an E-stop are the safety pair. The switches stop an axis that runs past its travel, and the button kills motion mid-job when a clamp is about to meet the bit.

• Laptop always beside the machine: the base kit or the switch kit.
• Machine in a garage or shed: an offline kit.
• First CNC, or shared with a teenager: a kit with switches and E-stop.
• Easiest menus: the 2.8-inch touchscreen kit.

All five use the same USB link and GRBL 1.1f firmware, so a job file made for one runs on any other. The offline controller is a convenience layer, not a different machine.

The switch-equipped kits also change the look: the Y-axis side plates are orange resin boards instead of black. That is the quick way to tell them apart in photos.

The machine tells you when a number is wrong. A squeal and melted edges on acrylic mean the feed is too slow; a hammering gantry and a stalling note from the 775 mean the depth is too greedy.

Limits worth knowing before buying:

• 45 mm of Z: stock plus bit plus clamp must fit under the spindle.
• Nylon plates: fine for wood, but they flex in aluminium, so keep metal passes shallow.
• Spindle drive headroom: the board can run a spindle up to 20,000 rpm, so a faster 775-size motor is a plug-in upgrade.
• Laser port: 12 V 3-pin PWM/TTL modules from 0.5 W to 20 W connect directly.

A laser swap turns the kit into a 2-in-1 for leather, cardboard and wood marking. The 3018 laser rundown covers the 5W and 10W modules that fit this bracket style.

Genmitsu brings the larger support library and a big range of parts made for its own frame. Twotrees moves to a 32-bit board. CNCTOPBAOS gives the widest choice of kits on one machine, up to the touchscreen with switches.

• Wood, plastics and PCB on a tight budget: CNCTOPBAOS or RATTMMOTOR.
• Most add-ons and guides built for the frame: the Genmitsu 3018-PRO.
• Aluminium and thick stock: a 500W machine such as the LUNYEE Pro Max.

Shared parts cut both ways. A 775 motor, T8 nut or Nema17 from any of these 3018-PRO kits will usually swap into another, which keeps spares cheap and easy to find. Brand-specific add-ons, such as a maker's own Z assembly or bed extension, are where you need to check dimensions before assuming a fit.

Before ordering, check:

• Which kit: offline controller, switches, both, or touchscreen.
• Your thickest stock fits under 45 mm of Z with the bit and clamps.
• A laser, if planned, is a 12 V 3-pin module.